Do you want this big green box to go away? Well here's how...
Click here for full update
Wildcat! photo archives restored.
Click here for full update
Donors can now disable ads.
Click here for instructions
Add yourself to the user map.
Click here for instructions
Click here for full update
Wildcat! photo archives restored.
Click here for full update
Donors can now disable ads.
Click here for instructions
Add yourself to the user map.
Click here for instructions
Sensenich prop 74 x 58"
-
Robert Johnson
Sensenich prop 74 x 58"
This message is for Brian regarding your new Sensenich 74" Dia. x 58" pitch. This is what I have on Rebel "652" on my O320 H2AD 160HP. I can't pull the full 2700 RPM on a static run-up, more like 2500, but it climbs like a rocket, and just the other day, with a passenger on board and 3/4 fuel, I demonstrated to him, in level flight, fire wall the throttle, fight to stop from climbing, and watch the airspeed indicator creep past 160 mph, while approaching 2700 rpm. From what you described with your performance, it does not sound like a 58" pitch. Have you checked the markings on the hub ??
-
Brian & Pat Cross
Sensenich prop 74 x 58"
Hi Robert
Thanks very much for your info. I am going way over the engine red-line assuming my tach is correct. I am going to get my tach checked somewhere. Static rpm is at least 2500 rpm. I can go over 2700 rpm at 12,000 feet...something Sensenich thought would never happen.
I will pull the prop assembly apart this weekend & check for markings. I contacted the fine folks at Purple Hill Air who just painted the aircraft & installed the prop for & they stated that no information of any kind came with the prop save a generic prop log booklet.
Robert, you mention that the hub has the diameter & pitch marked on the hub. Is this on the front or back? I have not seen the hub as it is covered by the great looking Sensenich spinner. Getting their spinner, by the way, turned out really well. No cutting required, and the spinner is all predrilled, with nut plates, and the best part is that the material is heat treated. I would also not be inclined to use the Murphy spinner. Had some trouble with the forward flange although the rear flange with a doubler & the spinner itself looks great.
That sounds like one heck of speed for a Rebel. Have you cross checked your airspeed with GPS etc? As I mentioned earlier, I am now back at the speed of Rebel equipped with the Rotax 912. Although the 912 is a very fine engine, this is not what I am looking for.
Thanks again for your help.
Brian #328R
Thanks very much for your info. I am going way over the engine red-line assuming my tach is correct. I am going to get my tach checked somewhere. Static rpm is at least 2500 rpm. I can go over 2700 rpm at 12,000 feet...something Sensenich thought would never happen.
I will pull the prop assembly apart this weekend & check for markings. I contacted the fine folks at Purple Hill Air who just painted the aircraft & installed the prop for & they stated that no information of any kind came with the prop save a generic prop log booklet.
Robert, you mention that the hub has the diameter & pitch marked on the hub. Is this on the front or back? I have not seen the hub as it is covered by the great looking Sensenich spinner. Getting their spinner, by the way, turned out really well. No cutting required, and the spinner is all predrilled, with nut plates, and the best part is that the material is heat treated. I would also not be inclined to use the Murphy spinner. Had some trouble with the forward flange although the rear flange with a doubler & the spinner itself looks great.
That sounds like one heck of speed for a Rebel. Have you cross checked your airspeed with GPS etc? As I mentioned earlier, I am now back at the speed of Rebel equipped with the Rotax 912. Although the 912 is a very fine engine, this is not what I am looking for.
Thanks again for your help.
Brian #328R
-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of Robert Johnson
Sent: Thursday, March 28, 2002 8:25 AM
To: murphy-rebel@dcsol.com
Subject: Sensenich prop 74 x 58"
This message is for Brian regarding your new Sensenich 74" Dia. x 58" pitch. This is what I have on Rebel "652" on my O320 H2AD 160HP. I can't pull the full 2700 RPM on a static run-up, more like 2500, but it climbs like a rocket, and just the other day, with a passenger on board and 3/4 fuel, I demonstrated to him, in level flight, fire wall the throttle, fight to stop from climbing, and watch the airspeed indicator creep past 160 mph, while approaching 2700 rpm. From what you described with your performance, it does not sound like a 58" pitch. Have you checked the markings on the hub ??
-
Mike Kimball
Sensenich prop 74 x 58"
Poor man's way to check the tach: Put a little piece of duct tape on the back of a prop blade, wait for the sun to do down, then position the airplane with one of the airport flood lights behind the plane. In the USA we have 60 cycles per second AC power (plus or minus no more than ~2% usually). The light will flicker at that rate even if you can't see it. (I don't know if Canada might be 50 Hz.) Set the rpm at factors of the power cycle rate. For instance, set 1800 rpm for 60 Hz power. At 1800 rpm the prop with the tape on it should appear to stop. If it stops at something other than 1800 rpm, that is how far off your tach is. If it stops at 1700 rpm, it is reading 100 rpm low. (You need the tape because most props are painted black on the back and would be harder to see.) The prop should appear to stop at all factors of 60, such as 1200 and 2400 rpm as well as 1800 rpm.
Mike Kimball
SR#044
-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of Brian & Pat Cross
Sent: Thursday, March 28, 2002 4:46 PM
To: murphy-rebel@dcsol.com
Subject: RE: Sensenich prop 74 x 58"
Hi Robert
Thanks very much for your info. I am going way over the engine red-line assuming my tach is correct. I am going to get my tach checked somewhere. Static rpm is at least 2500 rpm. I can go over 2700 rpm at 12,000 feet...something Sensenich thought would never happen.
I will pull the prop assembly apart this weekend & check for markings. I contacted the fine folks at Purple Hill Air who just painted the aircraft & installed the prop for & they stated that no information of any kind came with the prop save a generic prop log booklet.
Robert, you mention that the hub has the diameter & pitch marked on the hub. Is this on the front or back? I have not seen the hub as it is covered by the great looking Sensenich spinner. Getting their spinner, by the way, turned out really well. No cutting required, and the spinner is all predrilled, with nut plates, and the best part is that the material is heat treated. I would also not be inclined to use the Murphy spinner. Had some trouble with the forward flange although the rear flange with a doubler & the spinner itself looks great.
That sounds like one heck of speed for a Rebel. Have you cross checked your airspeed with GPS etc? As I mentioned earlier, I am now back at the speed of Rebel equipped with the Rotax 912. Although the 912 is a very fine engine, this is not what I am looking for.
Thanks again for your help.
Brian #328R
Mike Kimball
SR#044
-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of Brian & Pat Cross
Sent: Thursday, March 28, 2002 4:46 PM
To: murphy-rebel@dcsol.com
Subject: RE: Sensenich prop 74 x 58"
Hi Robert
Thanks very much for your info. I am going way over the engine red-line assuming my tach is correct. I am going to get my tach checked somewhere. Static rpm is at least 2500 rpm. I can go over 2700 rpm at 12,000 feet...something Sensenich thought would never happen.
I will pull the prop assembly apart this weekend & check for markings. I contacted the fine folks at Purple Hill Air who just painted the aircraft & installed the prop for & they stated that no information of any kind came with the prop save a generic prop log booklet.
Robert, you mention that the hub has the diameter & pitch marked on the hub. Is this on the front or back? I have not seen the hub as it is covered by the great looking Sensenich spinner. Getting their spinner, by the way, turned out really well. No cutting required, and the spinner is all predrilled, with nut plates, and the best part is that the material is heat treated. I would also not be inclined to use the Murphy spinner. Had some trouble with the forward flange although the rear flange with a doubler & the spinner itself looks great.
That sounds like one heck of speed for a Rebel. Have you cross checked your airspeed with GPS etc? As I mentioned earlier, I am now back at the speed of Rebel equipped with the Rotax 912. Although the 912 is a very fine engine, this is not what I am looking for.
Thanks again for your help.
Brian #328R
-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of Robert Johnson
Sent: Thursday, March 28, 2002 8:25 AM
To: murphy-rebel@dcsol.com
Subject: Sensenich prop 74 x 58"
This message is for Brian regarding your new Sensenich 74" Dia. x 58" pitch. This is what I have on Rebel "652" on my O320 H2AD 160HP. I can't pull the full 2700 RPM on a static run-up, more like 2500, but it climbs like a rocket, and just the other day, with a passenger on board and 3/4 fuel, I demonstrated to him, in level flight, fire wall the throttle, fight to stop from climbing, and watch the airspeed indicator creep past 160 mph, while approaching 2700 rpm. From what you described with your performance, it does not sound like a 58" pitch. Have you checked the markings on the hub ??
-
Legeorgen
Sensenich prop 74 x 58"
Brian,
The prop markings for pitch, length, etc., were etched into the hub of my Sensenich prop. You can't miss them. I don't remember if it was front or back.
Bruce G 357R
The prop markings for pitch, length, etc., were etched into the hub of my Sensenich prop. You can't miss them. I don't remember if it was front or back.
Bruce G 357R
-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------
-
Brian & Pat Cross
Sensenich prop 74 x 58"
Hi MIke
That is quite a thought re: RPM testing. We do indeed have the same frequency here. Though I believe the frequency spec. is much much tighter than 2%. I used to balance large fans using strobe equipment etc. to measure phase angles of the out of balance fans etc. Same principal. I could give that a try. I guess I better not try that inside with my hangar door shut if I can't wait for nightfall! (Just kidding).
Thanks for your thoughts.
Brian #328R
That is quite a thought re: RPM testing. We do indeed have the same frequency here. Though I believe the frequency spec. is much much tighter than 2%. I used to balance large fans using strobe equipment etc. to measure phase angles of the out of balance fans etc. Same principal. I could give that a try. I guess I better not try that inside with my hangar door shut if I can't wait for nightfall! (Just kidding).
Thanks for your thoughts.
Brian #328R
-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of Mike Kimball
Sent: Friday, March 29, 2002 10:21 PM
To: murphy-rebel@dcsol.com
Subject: RE: Sensenich prop 74 x 58"
Poor man's way to check the tach: Put a little piece of duct tape on the back of a prop blade, wait for the sun to do down, then position the airplane with one of the airport flood lights behind the plane. In the USA we have 60 cycles per second AC power (plus or minus no more than ~2% usually). The light will flicker at that rate even if you can't see it. (I don't know if Canada might be 50 Hz.) Set the rpm at factors of the power cycle rate. For instance, set 1800 rpm for 60 Hz power. At 1800 rpm the prop with the tape on it should appear to stop. If it stops at something other than 1800 rpm, that is how far off your tach is. If it stops at 1700 rpm, it is reading 100 rpm low. (You need the tape because most props are painted black on the back and would be harder to see.) The prop should appear to stop at all factors of 60, such as 1200 and 2400 rpm as well as 1800 rpm.
Mike Kimball
SR#044
-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of Brian & Pat Cross
Sent: Thursday, March 28, 2002 4:46 PM
To: murphy-rebel@dcsol.com
Subject: RE: Sensenich prop 74 x 58"
Hi Robert
Thanks very much for your info. I am going way over the engine red-line assuming my tach is correct. I am going to get my tach checked somewhere. Static rpm is at least 2500 rpm. I can go over 2700 rpm at 12,000 feet...something Sensenich thought would never happen.
I will pull the prop assembly apart this weekend & check for markings. I contacted the fine folks at Purple Hill Air who just painted the aircraft & installed the prop for & they stated that no information of any kind came with the prop save a generic prop log booklet.
Robert, you mention that the hub has the diameter & pitch marked on the hub. Is this on the front or back? I have not seen the hub as it is covered by the great looking Sensenich spinner. Getting their spinner, by the way, turned out really well. No cutting required, and the spinner is all predrilled, with nut plates, and the best part is that the material is heat treated. I would also not be inclined to use the Murphy spinner. Had some trouble with the forward flange although the rear flange with a doubler & the spinner itself looks great.
That sounds like one heck of speed for a Rebel. Have you cross checked your airspeed with GPS etc? As I mentioned earlier, I am now back at the speed of Rebel equipped with the Rotax 912. Although the 912 is a very fine engine, this is not what I am looking for.
Thanks again for your help.
Brian #328R-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of Robert Johnson
Sent: Thursday, March 28, 2002 8:25 AM
To: murphy-rebel@dcsol.com
Subject: Sensenich prop 74 x 58"
This message is for Brian regarding your new Sensenich 74" Dia. x 58" pitch. This is what I have on Rebel "652" on my O320 H2AD 160HP. I can't pull the full 2700 RPM on a static run-up, more like 2500, but it climbs like a rocket, and just the other day, with a passenger on board and 3/4 fuel, I demonstrated to him, in level flight, fire wall the throttle, fight to stop from climbing, and watch the airspeed indicator creep past 160 mph, while approaching 2700 rpm. From what you described with your performance, it does not sound like a 58" pitch. Have you checked the markings on the hub ??
-
Bob Patterson
Sensenich prop 74 x 58"
Hi Brian !
Sounds like you've checked everything out and the prop
IS what it's supposed to be ..... tach error is only remaining
possibility. There's likely somebody in the chapter who has
an optical tach. If you can get up earlier tomorrow night,
before the RAA meeting, we can try to catch somebody ...
Per might have one ... and he's usually there.
We'll be there by about 7 anyway, as Anna is doing the
coffee & donuts for the meetings. Call us earlier, if you want.
Would like to see the bird and talk to you anyway.
.....bobp
---------------------------------orig.----------------------------
At 05:21 PM 3/31/02 -0500, you wrote:
-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------
Sounds like you've checked everything out and the prop
IS what it's supposed to be ..... tach error is only remaining
possibility. There's likely somebody in the chapter who has
an optical tach. If you can get up earlier tomorrow night,
before the RAA meeting, we can try to catch somebody ...
Per might have one ... and he's usually there.
We'll be there by about 7 anyway, as Anna is doing the
coffee & donuts for the meetings. Call us earlier, if you want.
Would like to see the bird and talk to you anyway.
.....bobp
---------------------------------orig.----------------------------
At 05:21 PM 3/31/02 -0500, you wrote:
couldHi MIke
That is quite a thought re: RPM testing. We do indeed have the same
frequency here. Though I believe the frequency spec. is much much tighter
than 2%. I used to balance large fans using strobe equipment etc. to
measure phase angles of the out of balance fans etc. Same principal. I
could give that a try. I guess I better not try that inside with my hangar
door shut if I can't wait for nightfall! (Just kidding).
Thanks for your thoughts.
Brian #328R
-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of
Mike Kimball
Sent: Friday, March 29, 2002 10:21 PM
To: murphy-rebel@dcsol.com
Subject: RE: Sensenich prop 74 x 58"
Poor man's way to check the tach: Put a little piece of duct tape on the
back of a prop blade, wait for the sun to do down, then position the
airplane with one of the airport flood lights behind the plane. In the USA
we have 60 cycles per second AC power (plus or minus no more than ~2%
usually). The light will flicker at that rate even if you can't see it. (I
don't know if Canada might be 50 Hz.) Set the rpm at factors of the power
cycle rate. For instance, set 1800 rpm for 60 Hz power. At 1800 rpm the
prop with the tape on it should appear to stop. If it stops at something
other than 1800 rpm, that is how far off your tach is. If it stops at 1700
rpm, it is reading 100 rpm low. (You need the tape because most props are
painted black on the back and would be harder to see.) The prop should
appear to stop at all factors of 60, such as 1200 and 2400 rpm as well as
1800 rpm.
Mike Kimball
SR#044
-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of
Brian & Pat Cross
Sent: Thursday, March 28, 2002 4:46 PM
To: murphy-rebel@dcsol.com
Subject: RE: Sensenich prop 74 x 58"
Hi Robert
Thanks very much for your info. I am going way over the engine red-line
assuming my tach is correct. I am going to get my tach checked somewhere.
Static rpm is at least 2500 rpm. I can go over 2700 rpm at 12,000
feet...something Sensenich thought would never happen.
I will pull the prop assembly apart this weekend & check for markings. I
contacted the fine folks at Purple Hill Air who just painted the aircraft &
installed the prop for & they stated that no information of any kind came
with the prop save a generic prop log booklet.
Robert, you mention that the hub has the diameter & pitch marked on the
hub. Is this on the front or back? I have not seen the hub as it is
covered by the great looking Sensenich spinner. Getting their spinner, by
the way, turned out really well. No cutting required, and the spinner is
all predrilled, with nut plates, and the best part is that the material is
heat treated. I would also not be inclined to use the Murphy spinner. Had
some trouble with the forward flange although the rear flange with a doubler
& the spinner itself looks great.
That sounds like one heck of speed for a Rebel. Have you cross checked
your airspeed with GPS etc? As I mentioned earlier, I am now back at the
speed of Rebel equipped with the Rotax 912. Although the 912 is a very fine
engine, this is not what I am looking for.
Thanks again for your help.
Brian #328R
-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of
Robert Johnson
Sent: Thursday, March 28, 2002 8:25 AM
To: murphy-rebel@dcsol.com
Subject: Sensenich prop 74 x 58"
This message is for Brian regarding your new Sensenich 74" Dia. x 58"
pitch. This is what I have on Rebel "652" on my O320 H2AD 160HP. I can't
pull the full 2700 RPM on a static run-up, more like 2500, but it climbs
like a rocket, and just the other day, with a passenger on board and 3/4
fuel, I demonstrated to him, in level flight, fire wall the throttle, fight
to stop from climbing, and watch the airspeed indicator creep past 160 mph,
while approaching 2700 rpm. From what you described with your performance,
it does not sound like a 58" pitch. Have you checked the markings on the hub
??
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.2600.0" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><SPAN class=650074017-31032002><FONT face=Arial color=#0000ff size=2>Hi
MIke</FONT></SPAN></DIV>
<DIV><SPAN class=650074017-31032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650074017-31032002><FONT face=Arial color=#0000ff size=2>That
is quite a thought re: RPM testing. We do indeed have the same frequency
here. Though I believe the frequency spec. is much much tighter than
2%. I used to balance large fans using strobe equipment etc. to measure
phase angles of the out of balance fans etc. Same principal. I
doorgive that a try. I guess I better not try that inside with my hangar
size=2>Thanksshut if I can't wait for nightfall! (Just kidding).</FONT></SPAN></DIV>
<DIV><SPAN class=650074017-31032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650074017-31032002><FONT face=Arial color=#0000ff
size=2>Brianfor your thoughts.</FONT></SPAN></DIV>
<DIV><SPAN class=650074017-31032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650074017-31032002><FONT face=Arial color=#0000ff
size=2>Poor#328R</FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> murphy-rebel@dcsol.com
[mailto:murphy-rebel@dcsol.com]<B>On Behalf Of </B>Mike
Kimball<BR><B>Sent:</B> Friday, March 29, 2002 10:21 PM<BR><B>To:</B>
murphy-rebel@dcsol.com<BR><B>Subject:</B> RE: Sensenich prop 74 x
58"<BR><BR></FONT></DIV>
<DIV><SPAN class=390400903-30032002><FONT face=Arial color=#0000ff
backman's way to check the tach: Put a little piece of duct tape on the
withof a prop blade, wait for the sun to do down, then position the airplane
have 60one of the airport flood lights behind the plane. In the USA we
usually). Thecycles per second AC power (plus or minus no more than ~2%
knowlight will flicker at that rate even if you can't see it. (I don't
theif Canada might be 50 Hz.) Set the rpm at factors of the power cycle
rate. For instance, set 1800 rpm for 60 Hz power. At 1800 rpm
somethingprop with the tape on it should appear to stop. If it stops at
2400 rpmother than 1800 rpm, that is how far off your tach is. If it stops at
1700 rpm, it is reading 100 rpm low. (You need the tape because
most props are painted black on the back and would be harder to see.)
The prop should appear to stop at all factors of 60, such as 1200 and
size=2>Mikeas well as 1800 rpm.</FONT></SPAN></DIV>
<DIV><SPAN class=390400903-30032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=390400903-30032002><FONT face=Arial color=#0000ff
checkedKimball</FONT></SPAN></DIV>
<DIV><SPAN class=390400903-30032002><FONT face=Arial color=#0000ff
size=2>SR#044</FONT></SPAN></DIV>
<DIV><SPAN class=390400903-30032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=390400903-30032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=390400903-30032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV class=OutlookMessageHeader><FONT face="Times New Roman"
size=2>-----Original Message-----<BR><B>From:</B> murphy-rebel@dcsol.com
[mailto:murphy-rebel@dcsol.com]<B>On Behalf Of</B> Brian & Pat
Cross<BR><B>Sent:</B> Thursday, March 28, 2002 4:46 PM<BR><B>To:</B>
murphy-rebel@dcsol.com<BR><B>Subject:</B> RE: Sensenich prop 74 x
58"<BR><BR></FONT></DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff size=2>Hi
Robert</FONT></SPAN></DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2>Thanks very much for your info. I am going way over the engine
red-line assuming my tach is correct. I am going to get my tach
2700 rpmsomewhere. Static rpm is at least 2500 rpm. I can go over
markings. at 12,000 feet...something Sensenich thought would never happen.
</FONT></SPAN></DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff size=2>I
will pull the prop assembly apart this weekend & check for
kindI contacted the fine folks at Purple Hill Air who just painted the aircraft
& installed the prop for & they stated that no information of any
marked oncame with the prop save a generic prop log booklet.</FONT></SPAN></DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2>Robert, you mention that the hub has the diameter & pitch
hub asthe hub. Is this on the front or back? I have not seen the
theit is covered by the great looking Sensenich spinner. Getting their
spinner, by the way, turned out really well. No cutting required, and
the spinner is all predrilled, with nut plates, and the best part is that
Murphymaterial is heat treated. I would also not be inclined to use the
size=2>Thatspinner. Had some trouble with the forward flange although the rear
flange with a doubler & the spinner itself looks
great.</FONT></SPAN></DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
Sensenich 74"sounds like one heck of speed for a Rebel. Have you cross checked your
airspeed with GPS etc? As I mentioned earlier, I am now back at the
speed of Rebel equipped with the Rotax 912. Although the 912 is a very
fine engine, this is not what I am looking for.</FONT></SPAN></DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2>Thanks again for your help.</FONT></SPAN></DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2>Brian #328R</FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> murphy-rebel@dcsol.com
[mailto:murphy-rebel@dcsol.com]<B>On Behalf Of </B>Robert
Johnson<BR><B>Sent:</B> Thursday, March 28, 2002 8:25 AM<BR><B>To:</B>
murphy-rebel@dcsol.com<BR><B>Subject:</B> Sensenich prop 74 x
58"<BR><BR></FONT></DIV>
<DIV><FONT size=2>This message is for Brian regarding your new
160HP.Dia. x 58" pitch. This is what I have on Rebel "652" on my O320 H2AD
andI can't pull the full 2700 RPM on a static run-up, more like 2500, but it
climbs like a rocket, and just the other day, with a passenger on board
past 1603/4 fuel, I demonstrated to him, in level flight, fire wall the throttle,
fight to stop from climbing, and watch the airspeed indicator creep
mph, while approaching 2700 rpm. From what you described with your
performance, it does not sound like a 58" pitch. Have you checked the
markings on the hub ??</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>
-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------
-
Brian & Pat Cross
Sensenich prop 74 x 58"
Hi Bob
I have something on tomorrow night thanks. I will try to catch up with you.
As I stated in another email, my tach is probably not dead on, but I know I
have never had the engine running so fast. It is really easy to the engine
to red line now compared to when the Warp Drive prop was installed. Do you
think that will change with the warmer weather?
Thanks again for your thoughts Bob.
Brian #328R
-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of
Bob Patterson
Sent: Sunday, March 31, 2002 7:54 PM
To: murphy-rebel@dcsol.com
Subject: RE: Sensenich prop 74 x 58"
Hi Brian !
Sounds like you've checked everything out and the prop
IS what it's supposed to be ..... tach error is only remaining
possibility. There's likely somebody in the chapter who has
an optical tach. If you can get up earlier tomorrow night,
before the RAA meeting, we can try to catch somebody ...
Per might have one ... and he's usually there.
We'll be there by about 7 anyway, as Anna is doing the
coffee & donuts for the meetings. Call us earlier, if you want.
Would like to see the bird and talk to you anyway.
.....bobp
---------------------------------orig.----------------------------
At 05:21 PM 3/31/02 -0500, you wrote:
** To unsubscribe, send e-mail to list-server@dcsol.com with **
** UNSUBSCRIBE MURPHY-REBEL in the message body on a line by itself **
** Archives located at http://rebel:builder@www.dcsol.com:81/default.htm **
** To contact the list admin, e-mail mike.davis@dcsol.com **
-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------
I have something on tomorrow night thanks. I will try to catch up with you.
As I stated in another email, my tach is probably not dead on, but I know I
have never had the engine running so fast. It is really easy to the engine
to red line now compared to when the Warp Drive prop was installed. Do you
think that will change with the warmer weather?
Thanks again for your thoughts Bob.
Brian #328R
-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of
Bob Patterson
Sent: Sunday, March 31, 2002 7:54 PM
To: murphy-rebel@dcsol.com
Subject: RE: Sensenich prop 74 x 58"
Hi Brian !
Sounds like you've checked everything out and the prop
IS what it's supposed to be ..... tach error is only remaining
possibility. There's likely somebody in the chapter who has
an optical tach. If you can get up earlier tomorrow night,
before the RAA meeting, we can try to catch somebody ...
Per might have one ... and he's usually there.
We'll be there by about 7 anyway, as Anna is doing the
coffee & donuts for the meetings. Call us earlier, if you want.
Would like to see the bird and talk to you anyway.
.....bobp
---------------------------------orig.----------------------------
At 05:21 PM 3/31/02 -0500, you wrote:
(IHi MIke
That is quite a thought re: RPM testing. We do indeed have the same
frequency here. Though I believe the frequency spec. is much much tighter
than 2%. I used to balance large fans using strobe equipment etc. to
measure phase angles of the out of balance fans etc. Same principal. I
could give that a try. I guess I better not try that inside with my hangar
door shut if I can't wait for nightfall! (Just kidding).
Thanks for your thoughts.
Brian #328R
-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of
Mike Kimball
Sent: Friday, March 29, 2002 10:21 PM
To: murphy-rebel@dcsol.com
Subject: RE: Sensenich prop 74 x 58"
Poor man's way to check the tach: Put a little piece of duct tape on the
back of a prop blade, wait for the sun to do down, then position the
airplane with one of the airport flood lights behind the plane. In the USA
we have 60 cycles per second AC power (plus or minus no more than ~2%
usually). The light will flicker at that rate even if you can't see it.
doublerdon't know if Canada might be 50 Hz.) Set the rpm at factors of the power
cycle rate. For instance, set 1800 rpm for 60 Hz power. At 1800 rpm the
prop with the tape on it should appear to stop. If it stops at something
other than 1800 rpm, that is how far off your tach is. If it stops at 1700
rpm, it is reading 100 rpm low. (You need the tape because most props are
painted black on the back and would be harder to see.) The prop should
appear to stop at all factors of 60, such as 1200 and 2400 rpm as well as
1800 rpm.
Mike Kimball
SR#044
-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of
Brian & Pat Cross
Sent: Thursday, March 28, 2002 4:46 PM
To: murphy-rebel@dcsol.com
Subject: RE: Sensenich prop 74 x 58"
Hi Robert
Thanks very much for your info. I am going way over the engine red-line
assuming my tach is correct. I am going to get my tach checked somewhere.
Static rpm is at least 2500 rpm. I can go over 2700 rpm at 12,000
feet...something Sensenich thought would never happen.
I will pull the prop assembly apart this weekend & check for markings. I
contacted the fine folks at Purple Hill Air who just painted the aircraft &
installed the prop for & they stated that no information of any kind came
with the prop save a generic prop log booklet.
Robert, you mention that the hub has the diameter & pitch marked on the
hub. Is this on the front or back? I have not seen the hub as it is
covered by the great looking Sensenich spinner. Getting their spinner, by
the way, turned out really well. No cutting required, and the spinner is
all predrilled, with nut plates, and the best part is that the material is
heat treated. I would also not be inclined to use the Murphy spinner. Had
some trouble with the forward flange although the rear flange with a
fine& the spinner itself looks great.
That sounds like one heck of speed for a Rebel. Have you cross checked
your airspeed with GPS etc? As I mentioned earlier, I am now back at the
speed of Rebel equipped with the Rotax 912. Although the 912 is a very
Ofengine, this is not what I am looking for.
Thanks again for your help.
Brian #328R
-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf
hubRobert Johnson
Sent: Thursday, March 28, 2002 8:25 AM
To: murphy-rebel@dcsol.com
Subject: Sensenich prop 74 x 58"
This message is for Brian regarding your new Sensenich 74" Dia. x 58"
pitch. This is what I have on Rebel "652" on my O320 H2AD 160HP. I can't
pull the full 2700 RPM on a static run-up, more like 2500, but it climbs
like a rocket, and just the other day, with a passenger on board and 3/4
fuel, I demonstrated to him, in level flight, fire wall the throttle, fight
to stop from climbing, and watch the airspeed indicator creep past 160 mph,
while approaching 2700 rpm. From what you described with your performance,
it does not sound like a 58" pitch. Have you checked the markings on the
size=2>Hi??
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.2600.0" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><SPAN class=650074017-31032002><FONT face=Arial color=#0000ff
size=2>ThatMIke</FONT></SPAN></DIV>
<DIV><SPAN class=650074017-31032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650074017-31032002><FONT face=Arial color=#0000ff
frequencyis quite a thought re: RPM testing. We do indeed have the same
measurehere. Though I believe the frequency spec. is much much tighter than
2%. I used to balance large fans using strobe equipment etc. to
couldphase angles of the out of balance fans etc. Same principal. I
doorgive that a try. I guess I better not try that inside with my hangar
kidding).</FONT></SPAN></DIV>shut if I can't wait for nightfall! (Just
size=2>Thanks<DIV><SPAN class=650074017-31032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650074017-31032002><FONT face=Arial color=#0000ff
size=2>Brianfor your thoughts.</FONT></SPAN></DIV>
<DIV><SPAN class=650074017-31032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650074017-31032002><FONT face=Arial color=#0000ff
size=2>Poor#328R</FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> murphy-rebel@dcsol.com
[mailto:murphy-rebel@dcsol.com]<B>On Behalf Of </B>Mike
Kimball<BR><B>Sent:</B> Friday, March 29, 2002 10:21 PM<BR><B>To:</B>
murphy-rebel@dcsol.com<BR><B>Subject:</B> RE: Sensenich prop 74 x
58"<BR><BR></FONT></DIV>
<DIV><SPAN class=390400903-30032002><FONT face=Arial color=#0000ff
backman's way to check the tach: Put a little piece of duct tape on the
withof a prop blade, wait for the sun to do down, then position the airplane
have 60one of the airport flood lights behind the plane. In the USA we
usually). Thecycles per second AC power (plus or minus no more than ~2%
knowlight will flicker at that rate even if you can't see it. (I don't
cycleif Canada might be 50 Hz.) Set the rpm at factors of the power
therate. For instance, set 1800 rpm for 60 Hz power. At 1800 rpm
somethingprop with the tape on it should appear to stop. If it stops at
atother than 1800 rpm, that is how far off your tach is. If it stops
because1700 rpm, it is reading 100 rpm low. (You need the tape
see.) most props are painted black on the back and would be harder to
2400 rpmThe prop should appear to stop at all factors of 60, such as 1200 and
size=2>Mikeas well as 1800 rpm.</FONT></SPAN></DIV>
<DIV><SPAN class=390400903-30032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=390400903-30032002><FONT face=Arial color=#0000ff
size=2>HiKimball</FONT></SPAN></DIV>
<DIV><SPAN class=390400903-30032002><FONT face=Arial color=#0000ff
size=2>SR#044</FONT></SPAN></DIV>
<DIV><SPAN class=390400903-30032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=390400903-30032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=390400903-30032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV class=OutlookMessageHeader><FONT face="Times New Roman"
size=2>-----Original Message-----<BR><B>From:</B> murphy-rebel@dcsol.com
[mailto:murphy-rebel@dcsol.com]<B>On Behalf Of</B> Brian & Pat
Cross<BR><B>Sent:</B> Thursday, March 28, 2002 4:46 PM<BR><B>To:</B>
murphy-rebel@dcsol.com<BR><B>Subject:</B> RE: Sensenich prop 74 x
58"<BR><BR></FONT></DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
engineRobert</FONT></SPAN></DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2>Thanks very much for your info. I am going way over the
checkedred-line assuming my tach is correct. I am going to get my tach
2700 rpmsomewhere. Static rpm is at least 2500 rpm. I can go over
size=2>Iat 12,000 feet...something Sensenich thought would never happen.
</FONT></SPAN></DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
markings. will pull the prop assembly apart this weekend & check for
aircraftI contacted the fine folks at Purple Hill Air who just painted the
kind& installed the prop for & they stated that no information of any
marked oncame with the prop save a generic prop log booklet.</FONT></SPAN></DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2>Robert, you mention that the hub has the diameter & pitch
hub asthe hub. Is this on the front or back? I have not seen the
andit is covered by the great looking Sensenich spinner. Getting their
spinner, by the way, turned out really well. No cutting required,
thethe spinner is all predrilled, with nut plates, and the best part is that
Murphymaterial is heat treated. I would also not be inclined to use the
size=2>Thatspinner. Had some trouble with the forward flange although the rear
flange with a doubler & the spinner itself looks
great.</FONT></SPAN></DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
yoursounds like one heck of speed for a Rebel. Have you cross checked
veryairspeed with GPS etc? As I mentioned earlier, I am now back at the
speed of Rebel equipped with the Rotax 912. Although the 912 is a
murphy-rebel@dcsol.comfine engine, this is not what I am looking for.</FONT></SPAN></DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2>Thanks again for your help.</FONT></SPAN></DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2>Brian #328R</FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
Sensenich 74"[mailto:murphy-rebel@dcsol.com]<B>On Behalf Of </B>Robert
Johnson<BR><B>Sent:</B> Thursday, March 28, 2002 8:25 AM<BR><B>To:</B>
murphy-rebel@dcsol.com<BR><B>Subject:</B> Sensenich prop 74 x
58"<BR><BR></FONT></DIV>
<DIV><FONT size=2>This message is for Brian regarding your new
160HP.Dia. x 58" pitch. This is what I have on Rebel "652" on my O320 H2AD
itI can't pull the full 2700 RPM on a static run-up, more like 2500, but
andclimbs like a rocket, and just the other day, with a passenger on board
throttle,3/4 fuel, I demonstrated to him, in level flight, fire wall the
past 160fight to stop from climbing, and watch the airspeed indicator creep
??</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>mph, while approaching 2700 rpm. From what you described with your
performance, it does not sound like a 58" pitch. Have you checked the
markings on the hub
** To unsubscribe, send e-mail to list-server@dcsol.com with **
** UNSUBSCRIBE MURPHY-REBEL in the message body on a line by itself **
** Archives located at http://rebel:builder@www.dcsol.com:81/default.htm **
** To contact the list admin, e-mail mike.davis@dcsol.com **
-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------
-
Mike Davis
Sensenich prop 74 x 58"
From: Walter Klatt [mailto:Walter.Klatt@shaw.ca]
Sent: Sunday, March 31, 2002 5:06 PM
To: murphy-rebel@dcsol.com
Subject: RE: Sensenich prop 74 x 58"
Another way to test your RPM might be to use/borrow a cheap automotive diagnostic tester. I used to have one (sold it years ago in a garage sale) from Canadian Tire that had a pick-up sensor that attached to a plug wire, and you set the unit to 4, 6 or 8 cyl to get the right RPM reading for your engine. I don't see why this wouldn't work for a Lyc as well. The pick-up lead should be long enough that you could do it with the cowl attached. Of course, it will still be a little windy there, if you do a full throttle static run-up.
Real weird about your Sensenich problems. I was thinking of buying the same prop, but with the 56 inch pitch for best float performance.
Glad to hear that the Warp failure on Jack's plane was just the cracks, so I will still keep flying mine.
Good luck and keep us posted.
Sent: Sunday, March 31, 2002 5:06 PM
To: murphy-rebel@dcsol.com
Subject: RE: Sensenich prop 74 x 58"
Another way to test your RPM might be to use/borrow a cheap automotive diagnostic tester. I used to have one (sold it years ago in a garage sale) from Canadian Tire that had a pick-up sensor that attached to a plug wire, and you set the unit to 4, 6 or 8 cyl to get the right RPM reading for your engine. I don't see why this wouldn't work for a Lyc as well. The pick-up lead should be long enough that you could do it with the cowl attached. Of course, it will still be a little windy there, if you do a full throttle static run-up.
Real weird about your Sensenich problems. I was thinking of buying the same prop, but with the 56 inch pitch for best float performance.
Glad to hear that the Warp failure on Jack's plane was just the cracks, so I will still keep flying mine.
Good luck and keep us posted.
-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of Brian & Pat Cross
Sent: Sunday, March 31, 2002 2:21 PM
To: murphy-rebel@dcsol.com
Subject: RE: Sensenich prop 74 x 58"
Hi MIke
That is quite a thought re: RPM testing. We do indeed have the same frequency here. Though I believe the frequency spec. is much much tighter than 2%. I used to balance large fans using strobe equipment etc. to measure phase angles of the out of balance fans etc. Same principal. I could give that a try. I guess I better not try that inside with my hangar door shut if I can't wait for nightfall! (Just kidding).
Thanks for your thoughts.
Brian #328R-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of Mike Kimball
Sent: Friday, March 29, 2002 10:21 PM
To: murphy-rebel@dcsol.com
Subject: RE: Sensenich prop 74 x 58"
Poor man's way to check the tach: Put a little piece of duct tape on the back of a prop blade, wait for the sun to do down, then position the airplane with one of the airport flood lights behind the plane. In the USA we have 60 cycles per second AC power (plus or minus no more than ~2% usually). The light will flicker at that rate even if you can't see it. (I don't know if Canada might be 50 Hz.) Set the rpm at factors of the power cycle rate. For instance, set 1800 rpm for 60 Hz power. At 1800 rpm the prop with the tape on it should appear to stop. If it stops at something other than 1800 rpm, that is how far off your tach is. If it stops at 1700 rpm, it is reading 100 rpm low. (You need the tape because most props are painted black on the back and would be harder to see.) The prop should appear to stop at all factors of 60, such as 1200 and 2400 rpm as well as 1800 rpm.
Mike Kimball
SR#044
-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of Brian & Pat Cross
Sent: Thursday, March 28, 2002 4:46 PM
To: murphy-rebel@dcsol.com
Subject: RE: Sensenich prop 74 x 58"
Hi Robert
Thanks very much for your info. I am going way over the engine red-line assuming my tach is correct. I am going to get my tach checked somewhere. Static rpm is at least 2500 rpm. I can go over 2700 rpm at 12,000 feet...something Sensenich thought would never happen.
I will pull the prop assembly apart this weekend & check for markings. I contacted the fine folks at Purple Hill Air who just painted the aircraft & installed the prop for & they stated that no information of any kind came with the prop save a generic prop log booklet.
Robert, you mention that the hub has the diameter & pitch marked on the hub. Is this on the front or back? I have not seen the hub as it is covered by the great looking Sensenich spinner. Getting their spinner, by the way, turned out really well. No cutting required, and the spinner is all predrilled, with nut plates, and the best part is that the material is heat treated. I would also not be inclined to use the Murphy spinner. Had some trouble with the forward flange although the rear flange with a doubler & the spinner itself looks great.
That sounds like one heck of speed for a Rebel. Have you cross checked your airspeed with GPS etc? As I mentioned earlier, I am now back at the speed of Rebel equipped with the Rotax 912. Although the 912 is a very fine engine, this is not what I am looking for.
Thanks again for your help.
Brian #328R-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of Robert Johnson
Sent: Thursday, March 28, 2002 8:25 AM
To: murphy-rebel@dcsol.com
Subject: Sensenich prop 74 x 58"
This message is for Brian regarding your new Sensenich 74" Dia. x 58" pitch. This is what I have on Rebel "652" on my O320 H2AD 160HP. I can't pull the full 2700 RPM on a static run-up, more like 2500, but it climbs like a rocket, and just the other day, with a passenger on board and 3/4 fuel, I demonstrated to him, in level flight, fire wall the throttle, fight to stop from climbing, and watch the airspeed indicator creep past 160 mph, while approaching 2700 rpm. From what you described with your performance, it does not sound like a 58" pitch. Have you checked the markings on the hub ??
-
Bob Patterson
Sensenich prop 74 x 58"
Hi Brian !
I doubt the weather will make <that> much of a difference -
there definitely is something amiss, though. An interesting problem !
Will try to track down a photo-tach tonight - I'm sure
somebody in the chapter has one ...
....bobp
-------------------------------------orig.------------------------------
At 11:28 PM 3/31/02 -0500, you wrote:
-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------
I doubt the weather will make <that> much of a difference -
there definitely is something amiss, though. An interesting problem !
Will try to track down a photo-tach tonight - I'm sure
somebody in the chapter has one ...
....bobp
-------------------------------------orig.------------------------------
At 11:28 PM 3/31/02 -0500, you wrote:
Hi Bob
I have something on tomorrow night thanks. I will try to catch up with you.
As I stated in another email, my tach is probably not dead on, but I know I
have never had the engine running so fast. It is really easy to the engine
to red line now compared to when the Warp Drive prop was installed. Do you
think that will change with the warmer weather?
Thanks again for your thoughts Bob.
Brian #328R
-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of
Bob Patterson
Sent: Sunday, March 31, 2002 7:54 PM
To: murphy-rebel@dcsol.com
Subject: RE: Sensenich prop 74 x 58"
Hi Brian !
Sounds like you've checked everything out and the prop
IS what it's supposed to be ..... tach error is only remaining
possibility. There's likely somebody in the chapter who has
an optical tach. If you can get up earlier tomorrow night,
before the RAA meeting, we can try to catch somebody ...
Per might have one ... and he's usually there.
We'll be there by about 7 anyway, as Anna is doing the
coffee & donuts for the meetings. Call us earlier, if you want.
Would like to see the bird and talk to you anyway.
.....bobp
---------------------------------orig.----------------------------
At 05:21 PM 3/31/02 -0500, you wrote:(IHi MIke
That is quite a thought re: RPM testing. We do indeed have the same
frequency here. Though I believe the frequency spec. is much much tighter
than 2%. I used to balance large fans using strobe equipment etc. to
measure phase angles of the out of balance fans etc. Same principal. I
could give that a try. I guess I better not try that inside with my hangar
door shut if I can't wait for nightfall! (Just kidding).
Thanks for your thoughts.
Brian #328R
-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of
Mike Kimball
Sent: Friday, March 29, 2002 10:21 PM
To: murphy-rebel@dcsol.com
Subject: RE: Sensenich prop 74 x 58"
Poor man's way to check the tach: Put a little piece of duct tape on the
back of a prop blade, wait for the sun to do down, then position the
airplane with one of the airport flood lights behind the plane. In the USA
we have 60 cycles per second AC power (plus or minus no more than ~2%
usually). The light will flicker at that rate even if you can't see it.doublerdon't know if Canada might be 50 Hz.) Set the rpm at factors of the power
cycle rate. For instance, set 1800 rpm for 60 Hz power. At 1800 rpm the
prop with the tape on it should appear to stop. If it stops at something
other than 1800 rpm, that is how far off your tach is. If it stops at 1700
rpm, it is reading 100 rpm low. (You need the tape because most props are
painted black on the back and would be harder to see.) The prop should
appear to stop at all factors of 60, such as 1200 and 2400 rpm as well as
1800 rpm.
Mike Kimball
SR#044
-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of
Brian & Pat Cross
Sent: Thursday, March 28, 2002 4:46 PM
To: murphy-rebel@dcsol.com
Subject: RE: Sensenich prop 74 x 58"
Hi Robert
Thanks very much for your info. I am going way over the engine red-line
assuming my tach is correct. I am going to get my tach checked somewhere.
Static rpm is at least 2500 rpm. I can go over 2700 rpm at 12,000
feet...something Sensenich thought would never happen.
I will pull the prop assembly apart this weekend & check for markings. I
contacted the fine folks at Purple Hill Air who just painted the aircraft &
installed the prop for & they stated that no information of any kind came
with the prop save a generic prop log booklet.
Robert, you mention that the hub has the diameter & pitch marked on the
hub. Is this on the front or back? I have not seen the hub as it is
covered by the great looking Sensenich spinner. Getting their spinner, by
the way, turned out really well. No cutting required, and the spinner is
all predrilled, with nut plates, and the best part is that the material is
heat treated. I would also not be inclined to use the Murphy spinner. Had
some trouble with the forward flange although the rear flange with afine& the spinner itself looks great.
That sounds like one heck of speed for a Rebel. Have you cross checked
your airspeed with GPS etc? As I mentioned earlier, I am now back at the
speed of Rebel equipped with the Rotax 912. Although the 912 is a veryOfengine, this is not what I am looking for.
Thanks again for your help.
Brian #328R
-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On BehalfhubRobert Johnson
Sent: Thursday, March 28, 2002 8:25 AM
To: murphy-rebel@dcsol.com
Subject: Sensenich prop 74 x 58"
This message is for Brian regarding your new Sensenich 74" Dia. x 58"
pitch. This is what I have on Rebel "652" on my O320 H2AD 160HP. I can't
pull the full 2700 RPM on a static run-up, more like 2500, but it climbs
like a rocket, and just the other day, with a passenger on board and 3/4
fuel, I demonstrated to him, in level flight, fire wall the throttle, fight
to stop from climbing, and watch the airspeed indicator creep past 160 mph,
while approaching 2700 rpm. From what you described with your performance,
it does not sound like a 58" pitch. Have you checked the markings on thesize=2>Hi??
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.2600.0" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><SPAN class=650074017-31032002><FONT face=Arial color=#0000ffsize=2>ThatMIke</FONT></SPAN></DIV>
<DIV><SPAN class=650074017-31032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650074017-31032002><FONT face=Arial color=#0000fffrequencyis quite a thought re: RPM testing. We do indeed have the samemeasurehere. Though I believe the frequency spec. is much much tighter than
2%. I used to balance large fans using strobe equipment etc. tocouldphase angles of the out of balance fans etc. Same principal. Idoorgive that a try. I guess I better not try that inside with my hangarkidding).</FONT></SPAN></DIV>shut if I can't wait for nightfall! (Justsize=2>Thanks<DIV><SPAN class=650074017-31032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650074017-31032002><FONT face=Arial color=#0000ffsize=2>Brianfor your thoughts.</FONT></SPAN></DIV>
<DIV><SPAN class=650074017-31032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650074017-31032002><FONT face=Arial color=#0000ffsize=2>Poor#328R</FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> murphy-rebel@dcsol.com
[mailto:murphy-rebel@dcsol.com]<B>On Behalf Of </B>Mike
Kimball<BR><B>Sent:</B> Friday, March 29, 2002 10:21 PM<BR><B>To:</B>
murphy-rebel@dcsol.com<BR><B>Subject:</B> RE: Sensenich prop 74 x
58"<BR><BR></FONT></DIV>
<DIV><SPAN class=390400903-30032002><FONT face=Arial color=#0000ffbackman's way to check the tach: Put a little piece of duct tape on thewithof a prop blade, wait for the sun to do down, then position the airplanehave 60one of the airport flood lights behind the plane. In the USA weusually). Thecycles per second AC power (plus or minus no more than ~2%knowlight will flicker at that rate even if you can't see it. (I don'tcycleif Canada might be 50 Hz.) Set the rpm at factors of the powertherate. For instance, set 1800 rpm for 60 Hz power. At 1800 rpmsomethingprop with the tape on it should appear to stop. If it stops atatother than 1800 rpm, that is how far off your tach is. If it stopsbecause1700 rpm, it is reading 100 rpm low. (You need the tapesee.) most props are painted black on the back and would be harder to2400 rpmThe prop should appear to stop at all factors of 60, such as 1200 andsize=2>Mikeas well as 1800 rpm.</FONT></SPAN></DIV>
<DIV><SPAN class=390400903-30032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=390400903-30032002><FONT face=Arial color=#0000ffsize=2>HiKimball</FONT></SPAN></DIV>
<DIV><SPAN class=390400903-30032002><FONT face=Arial color=#0000ff
size=2>SR#044</FONT></SPAN></DIV>
<DIV><SPAN class=390400903-30032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=390400903-30032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=390400903-30032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV class=OutlookMessageHeader><FONT face="Times New Roman"
size=2>-----Original Message-----<BR><B>From:</B> murphy-rebel@dcsol.com
[mailto:murphy-rebel@dcsol.com]<B>On Behalf Of</B> Brian & Pat
Cross<BR><B>Sent:</B> Thursday, March 28, 2002 4:46 PM<BR><B>To:</B>
murphy-rebel@dcsol.com<BR><B>Subject:</B> RE: Sensenich prop 74 x
58"<BR><BR></FONT></DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ffengineRobert</FONT></SPAN></DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2>Thanks very much for your info. I am going way over thecheckedred-line assuming my tach is correct. I am going to get my tach2700 rpmsomewhere. Static rpm is at least 2500 rpm. I can go oversize=2>Iat 12,000 feet...something Sensenich thought would never happen.
</FONT></SPAN></DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ffmarkings. will pull the prop assembly apart this weekend & check foraircraftI contacted the fine folks at Purple Hill Air who just painted thekind& installed the prop for & they stated that no information of anymarked oncame with the prop save a generic prop log booklet.</FONT></SPAN></DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2>Robert, you mention that the hub has the diameter & pitchhub asthe hub. Is this on the front or back? I have not seen theandit is covered by the great looking Sensenich spinner. Getting their
spinner, by the way, turned out really well. No cutting required,thethe spinner is all predrilled, with nut plates, and the best part is thatMurphymaterial is heat treated. I would also not be inclined to use thesize=2>Thatspinner. Had some trouble with the forward flange although the rear
flange with a doubler & the spinner itself looks
great.</FONT></SPAN></DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ffyoursounds like one heck of speed for a Rebel. Have you cross checkedveryairspeed with GPS etc? As I mentioned earlier, I am now back at the
speed of Rebel equipped with the Rotax 912. Although the 912 is amurphy-rebel@dcsol.comfine engine, this is not what I am looking for.</FONT></SPAN></DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2>Thanks again for your help.</FONT></SPAN></DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=650492101-29032002><FONT face=Arial color=#0000ff
size=2>Brian #328R</FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>Sensenich 74"[mailto:murphy-rebel@dcsol.com]<B>On Behalf Of </B>Robert
Johnson<BR><B>Sent:</B> Thursday, March 28, 2002 8:25 AM<BR><B>To:</B>
murphy-rebel@dcsol.com<BR><B>Subject:</B> Sensenich prop 74 x
58"<BR><BR></FONT></DIV>
<DIV><FONT size=2>This message is for Brian regarding your new160HP.Dia. x 58" pitch. This is what I have on Rebel "652" on my O320 H2ADitI can't pull the full 2700 RPM on a static run-up, more like 2500, butandclimbs like a rocket, and just the other day, with a passenger on boardthrottle,3/4 fuel, I demonstrated to him, in level flight, fire wall thepast 160fight to stop from climbing, and watch the airspeed indicator creep??</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>mph, while approaching 2700 rpm. From what you described with your
performance, it does not sound like a 58" pitch. Have you checked the
markings on the hub
** To unsubscribe, send e-mail to list-server@dcsol.com with **
** UNSUBSCRIBE MURPHY-REBEL in the message body on a line by itself **
** Archives located at http://rebel:builder@www.dcsol.com:81/default.htm **
** To contact the list admin, e-mail mike.davis@dcsol.com **
** To unsubscribe, send e-mail to list-server@dcsol.com with **
** UNSUBSCRIBE MURPHY-REBEL in the message body on a line by itself **
** Archives located at http://rebel:builder@www.dcsol.com:81/default.htm **
** To contact the list admin, e-mail mike.davis@dcsol.com **
-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------
-
Walter Klatt
Sensenich prop 74 x 58"
Another way to test your RPM might be to use/borrow a cheap automotive diagnostic tester. I used to have one (sold it years ago in a garage sale) from Canadian Tire that had a pick-up sensor that attached to a plug wire, and you set the unit to 4, 6 or 8 cyl to get the right RPM reading for your engine. I don't see why this wouldn't work for a Lyc as well. The pick-up lead should be long enough that you could do it with the cowl attached. Of course, it will still be a little windy there, if you do a full throttle static run-up.
Real weird about your Sensenich problems. I was thinking of buying the same prop, but with the 56 inch pitch for best float performance.
Glad to hear that the Warp failure on Jack's plane was just the cracks, so I will still keep flying mine.
Good luck and keep us posted.
Real weird about your Sensenich problems. I was thinking of buying the same prop, but with the 56 inch pitch for best float performance.
Glad to hear that the Warp failure on Jack's plane was just the cracks, so I will still keep flying mine.
Good luck and keep us posted.
-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of Brian & Pat Cross
Sent: Sunday, March 31, 2002 2:21 PM
To: murphy-rebel@dcsol.com
Subject: RE: Sensenich prop 74 x 58"
Hi MIke
That is quite a thought re: RPM testing. We do indeed have the same frequency here. Though I believe the frequency spec. is much much tighter than 2%. I used to balance large fans using strobe equipment etc. to measure phase angles of the out of balance fans etc. Same principal. I could give that a try. I guess I better not try that inside with my hangar door shut if I can't wait for nightfall! (Just kidding).
Thanks for your thoughts.
Brian #328R-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of Mike Kimball
Sent: Friday, March 29, 2002 10:21 PM
To: murphy-rebel@dcsol.com
Subject: RE: Sensenich prop 74 x 58"
Poor man's way to check the tach: Put a little piece of duct tape on the back of a prop blade, wait for the sun to do down, then position the airplane with one of the airport flood lights behind the plane. In the USA we have 60 cycles per second AC power (plus or minus no more than ~2% usually). The light will flicker at that rate even if you can't see it. (I don't know if Canada might be 50 Hz.) Set the rpm at factors of the power cycle rate. For instance, set 1800 rpm for 60 Hz power. At 1800 rpm the prop with the tape on it should appear to stop. If it stops at something other than 1800 rpm, that is how far off your tach is. If it stops at 1700 rpm, it is reading 100 rpm low. (You need the tape because most props are painted black on the back and would be harder to see.) The prop should appear to stop at all factors of 60, such as 1200 and 2400 rpm as well as 1800 rpm.
Mike Kimball
SR#044
-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of Brian & Pat Cross
Sent: Thursday, March 28, 2002 4:46 PM
To: murphy-rebel@dcsol.com
Subject: RE: Sensenich prop 74 x 58"
Hi Robert
Thanks very much for your info. I am going way over the engine red-line assuming my tach is correct. I am going to get my tach checked somewhere. Static rpm is at least 2500 rpm. I can go over 2700 rpm at 12,000 feet...something Sensenich thought would never happen.
I will pull the prop assembly apart this weekend & check for markings. I contacted the fine folks at Purple Hill Air who just painted the aircraft & installed the prop for & they stated that no information of any kind came with the prop save a generic prop log booklet.
Robert, you mention that the hub has the diameter & pitch marked on the hub. Is this on the front or back? I have not seen the hub as it is covered by the great looking Sensenich spinner. Getting their spinner, by the way, turned out really well. No cutting required, and the spinner is all predrilled, with nut plates, and the best part is that the material is heat treated. I would also not be inclined to use the Murphy spinner. Had some trouble with the forward flange although the rear flange with a doubler & the spinner itself looks great.
That sounds like one heck of speed for a Rebel. Have you cross checked your airspeed with GPS etc? As I mentioned earlier, I am now back at the speed of Rebel equipped with the Rotax 912. Although the 912 is a very fine engine, this is not what I am looking for.
Thanks again for your help.
Brian #328R-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of Robert Johnson
Sent: Thursday, March 28, 2002 8:25 AM
To: murphy-rebel@dcsol.com
Subject: Sensenich prop 74 x 58"
This message is for Brian regarding your new Sensenich 74" Dia. x 58" pitch. This is what I have on Rebel "652" on my O320 H2AD 160HP. I can't pull the full 2700 RPM on a static run-up, more like 2500, but it climbs like a rocket, and just the other day, with a passenger on board and 3/4 fuel, I demonstrated to him, in level flight, fire wall the throttle, fight to stop from climbing, and watch the airspeed indicator creep past 160 mph, while approaching 2700 rpm. From what you described with your performance, it does not sound like a 58" pitch. Have you checked the markings on the hub ??
