Page 1 of 2

cowling

Posted: Fri Feb 17, 2012 5:26 pm
by BILNEWKIRK
BOB P.

N13BN NOW HAS 57 HOURS. I SOLVED THE OIL BLOW-BY PROBLEM BY RELOCATING THE
BREATHER OUTLET FROM THE ACCESSORY CASE TO THE DIP-STICK TUBE.

I HAVE A "SPEED" COWLING BUT I AM NOT HAPPY WITH IT AND AM GOING TO BUILD A
METAL COWL. QUESTION: SHOULD I BUY THE MURPHY FIBERGLASS NOSE, OR SHOULD I
GET ONE FROM AIRCRAFT SPRUCE? WHICH ONE HAS THE BEST QUALITY?

THANKS, BILL NEWKIRK
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cowling

Posted: Fri Feb 17, 2012 5:26 pm
by Wayne G. O'Shea
Hello Bill and All, Wayne O'Shea here! I've been sitting in the back ground reading the archives for quite some time and have decided to join the list. Not sure if it's because the archives are not being updated or that I'm tired of Bob picking on my compression spring gear!(just kidding Bob everyone has their own opinon of everything)

If you have been to Oshkosh you have seen my work, 1st Rebel built from April93 to June 1995 (976 hours crate to air) and flown to Oshkosh '95 only to be parked in row 136 waaaay down at the end of the field. The last 3 years(2 of which won builders choice) you have seen Howard Hanfords Rebel on Amphibious floats that I did considerable work on and also fabricated and installed his floats. I have also built (in less than 700 hours) an advanced ultralight model of the rebel(which is no different that a full blown one other than no rear floor, the wing spars are one gauge lighter and a Rotax 912). Currently doing final assembly on a Rebel that was basically destroyed when cart wheeled on floats. I have completely reconstructed this aircraft to better than new condition with a 0 timed O-320-E2D(originally had a Subaru) and a new Sensenich prop(ouch, 3 big bills). I also have my original Rebel in my shop with the original O-235-C 100HP removed, and currently reinforcing the firewall to take the 0 timed O-320-C2A I have for it.(thats a O-320-B1 derated from 160hp to 150hp in case your curious! The engine shop thought I was nuts, but have you ever tried finding 100LL when you are on floats?). (my mags failed on the O-235-C and it was a good enough excuse!) I removed the gear to facilitate installing some new lower corner wraps and by the way Bob the pivot holes in the gear legs are still as tight as they were in 1995.

Cowlings!!!!! Oh yah! My original Rebel used the fiberglass nose bowl and 4 aluminun doors. Beautiful for inspecting and working on the aircraft. Does take considerable time to fabricate compared to the speed cowl though. When you do the nose bowl, ring the bowl with a 40thou piece of aluminum sticking out about an inch to close the doors onto. This allows them to be flush with the fiberglass and not sitting on top of the fiberglass. Piano hinge wires were replaced with one size smaller S.S. wires to facilitate easier installlation and removal. My nose bowl is still crackless to this point in time, don't imagine A/C spruces supplier lays it up any better. Price would be the key. Howard Hanfords rebel(oshkosh winner) has the speed cowl and the way Howard had me do it is a pain in the butt when you want to remove it! Especially at the dock(a tarp has to be spread between floats to make sure none of the camlocks are lost in the lake) The ultralight rebel has a lower fiberglass section and then 2 aluminum doors on top. Works quite well as long as you sling the radiator on the 912 and mount the oil cooler to the engine so the lower section can be removed. Murphy's manual has you mount the rad and the cooler to the cowling so you will never remove it again!!!! The rebuild that I just put the O-320-E2D onto was done using the speed cowl. Piano hinges installed on the inside of the cowl, with the hinge wire slipped through the very nose of the cowl down each side to peg the 2 halfs together. Then AN525-1032 screw around the firewall. This is better than Howards, but still not as nice as the original old piper type nose bowl and 4 doors. With the old style cowl you can even change the oil without removing any of the cowl. Just open a lower door! So if you want sleek looks and no measurable speed increase install the speed cowl(although you will never open it up to do maintenance until its to late!) If you want an installation that allows you to easily do preflights, maint. etc use the bowl and doors. But, as we all get lazy, still install an oil door in the right top door panel for an easy quick oil check!

Enough rambling, don't know how often I will be checking in with my work schedule, but hope I helped somehow. I will be sending one more e-mail seperately today regarding the tail post. Oh ya, E-mails scaring people that are working along at a good pace(2 1/2 weeks and well into a wing) and telling them it's going to take 3000 hours don't help moral for getting the job done! Total time depends on certain levels of mechanical inclindness(if thats a word). I built my first street rod by the time I was turning 15 and had to wait a year to be able to drive it. I graduated with honours in Electro-Mechanical Engineering and have been working with my hands daily to this date. This background allows me to build at the rate I do(and I also run an Injection Moulding Company). When all the airframe parts are done(wings, tail feathers and fuselage) you are basically half way there! The other half is you engine installation, panel installation,struts, fairings and wing tips. So base your total time by this. A paint job tackled by yourself with an experience helper will add another 2 or 3 weeks to your aircraft, but do it now as you will be having so much fun flying it, you will never paint it!!!!!!! I have a large variety of aircraft at my disposal to fly including some Ex-Yugoslavian airforce recon. aircraft. 340 H.P Supercharged STOL Monsters, but none are as fun to fly s the trusty old Rebel so keep on plugging away!

Regards, Wayne G. O'Shea

cowling

Posted: Fri Feb 17, 2012 5:26 pm
by Bob Patterson
Glad you've solved that one !

I suspect more people will be following you in ditching the "speed"
cowl - looks sexy, but no speed improvement, poorer cooling, and very
awkward for maintenance .... Wayne has said it all - "If you can't get
at it easily, you likely won't do regular maintenance inspections until
it's too late !!"

I can't comment on quality - they're probably very similar. It comes
down to the appearance you prefer. Rick Harper, in Australia, has used a
Thorp T-18 cowl from A-S, (about $85), and made his own metal cowl. It looks
very nice - quite a different look for the Rebel. Will try to send a photo
to Mike to post for you to see - if it's not already there....

By all means, follow Wayne's suggestions - these were pioneered by
Tobey Riley, on his Rebel (No. 053 ?). Run a 2 or 3 inch strip of aluminum
all the way around the back of the nose bowl, with half of it sticking
out past the fibreglas. This makes a lip that can be covered with anti-
chafe tape, to rest the top cowl sections on. This gives a flush top
cowl, and greatly stiffens the nose bowl, so the fibreglas won't crack.
(You may have to flute the aluminum in a few places, between rivets ...)
Position the 3" or so side channels that support the nose bowl so that
they clear the cylinder heads, and run almost horizontal. Mount the piano
hinges on BOTH sides of the channels, and on the bottom channel as well.
You can then just pull the 2 center pins, and the cowl will open up both
top and bottom, for GREAT access, and you don't have to worry about where
to put that huge top like you do with the speed cowl - the doors are still
held on by the other piano hinges !

Tobey made the top center support channel about 10" wide, to allow
air to pass back through it to an automotive transmission cooler mounted
under the channel. This was his oil cooler - and it worked very well. The
pipe out of the cooler was run straight down to dump out the bottom of the
cowl, but it had a flipper box that could direct the hot air inside,
to a channel fastened to the bottom of the top instrument panel cover.
The top had holes drilled in it, so the warm air could provide defrosting.
Something we really need up here in the "Great White North", but maybe not
so necessary in Georgia ! :-)

Keep 'em flying !!
......bobp


--------------------------------orig.--------------------------------------
At 11:02 AM 10/15/99 EDT, you wrote:
BOB P.

N13BN NOW HAS 57 HOURS. I SOLVED THE OIL BLOW-BY PROBLEM BY RELOCATING THE
BREATHER OUTLET FROM THE ACCESSORY CASE TO THE DIP-STICK TUBE.

I HAVE A "SPEED" COWLING BUT I AM NOT HAPPY WITH IT AND AM GOING TO BUILD A
METAL COWL. QUESTION: SHOULD I BUY THE MURPHY FIBERGLASS NOSE, OR SHOULD I
GET ONE FROM AIRCRAFT SPRUCE? WHICH ONE HAS THE BEST QUALITY?

THANKS, BILL NEWKIRK
*----------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*----------------------------------------------------*



*----------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*----------------------------------------------------*




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cowling

Posted: Fri Feb 17, 2012 5:26 pm
by Bob Patterson
Welcome !!! Glad you decided to come out of hiding !! The group could
certainly benefit from your years of experience and helpful advice. (We've
missed you, and the rest of the Barrie group, at the builders meetings !)
Next one is November 14th (hint, hint ....)
I suspect there might be some interest in your wheel-penetration skis
here, as well.

Glad to hear there was no visible wear on the gear bushings - that was
one of my big worries. Do you have the brass bushings on them ?

I really would like to see someone making a stacked rubber biscuit gear
like that shown on that German "Rebel rip-off" - maybe it could be used on
the amphib floats, as well !!!

I agree COMPLETELY with your comments on cowlings !! About time more
folks were more concerned with easy maintenance than perceived good looks !!
And I'm always MORE than happy to have someone else supporting the Rotax
912 ... :-) :-) (Cheap, FUN flying !!)

MUCH rather FLY than FIX !! ;-) But I'm glad some people are
making the effort to refine the Subarus - I have enjoyed flying them.
They do represent superior technology, but I agree that there seem to be
some pretty "optimistic" horespower claims coming from some corners -
although not as many as in the past. (The 'bad guys' have been going broke !)


Keep 'em flying !
.....bobp

------------------------------orig.---------------------------------------
At 05:07 PM 10/15/99 -0400, you wrote:
Hello Bill and All, Wayne O'Shea here! I've been sitting in the back ground
reading the archives for quite some time and have decided to join the list.
Not sure if it's because the archives are not being updated or that I'm
tired of Bob picking on my compression spring gear!(just kidding Bob
everyone has their own opinon of everything)
If you have been to Oshkosh you have seen my work, 1st Rebel built from
April93 to June 1995 (976 hours crate to air) and flown to Oshkosh '95 only
to be parked in row 136 waaaay down at the end of the field. The last 3
years(2 of which won builders choice) you have seen Howard Hanfords Rebel on
Amphibious floats that I did considerable work on and also fabricated and
installed his floats. I have also built (in less than 700 hours) an advanced
ultralight model of the rebel(which is no different that a full blown one
other than no rear floor, the wing spars are one gauge lighter and a Rotax
912). Currently doing final assembly on a Rebel that was basically destroyed
when cart wheeled on floats. I have completely reconstructed this aircraft
to better than new condition with a 0 timed O-320-E2D(originally had a
Subaru) and a new Sensenich prop(ouch, 3 big bills). I also have my original
Rebel in my shop with the original O-235-C 100HP removed, and currently
reinforcing the firewall to take the 0 timed O-320-C2A I have for it.(thats
a O-320-B1 derated from 160hp to 150hp in case your curious! The engine shop
thought I was nuts, but have you ever tried finding 100LL when you are on
floats?). (my mags failed on the O-235-C and it was a good enough excuse!) I
removed the gear to facilitate installing some new lower corner wraps and by
the way Bob the pivot holes in the gear legs are still as tight as they were
in 1995.
Cowlings!!!!! Oh yah! My original Rebel used the fiberglass nose bowl and 4
aluminun doors. Beautiful for inspecting and working on the aircraft. Does
take considerable time to fabricate compared to the speed cowl though. When
you do the nose bowl, ring the bowl with a 40thou piece of aluminum sticking
out about an inch to close the doors onto. This allows them to be flush with
the fiberglass and not sitting on top of the fiberglass. Piano hinge wires
were replaced with one size smaller S.S. wires to facilitate easier
installlation and removal. My nose bowl is still crackless to this point in
time, don't imagine A/C spruces supplier lays it up any better. Price would
be the key. Howard Hanfords rebel(oshkosh winner) has the speed cowl and the
way Howard had me do it is a pain in the butt when you want to remove it!
Especially at the dock(a tarp has to be spread between floats to make sure
none of the camlocks are lost in the lake) The ultralight rebel has a lower
fiberglass section and then 2 aluminum doors on top. Works quite well as
long as you sling the radiator on the 912 and mount the oil cooler to the
engine so the lower section can be removed. Murphy's manual has you mount
the rad and the cooler to the cowling so you will never remove it again!!!!
The rebuild that I just put the O-320-E2D onto was done using the speed
cowl. Piano hinges installed on the inside of the cowl, with the hinge wire
slipped through the very nose of the cowl down each side to peg the 2 halfs
together. Then AN525-1032 screw around the firewall. This is better than
Howards, but still not as nice as the original old piper type nose bowl and
4 doors. With the old style cowl you can even change the oil without
removing any of the cowl. Just open a lower door! So if you want sleek looks
and no measurable speed increase install the speed cowl(although you will
never open it up to do maintenance until its to late!) If you want an
installation that allows you to easily do preflights, maint. etc use the
bowl and doors. But, as we all get lazy, still install an oil door in the
right top door panel for an easy quick oil check!
Enough rambling, don't know how often I will be checking in with my work
schedule, but hope I helped somehow. I will be sending one more e-mail
seperately today regarding the tail post. Oh ya, E-mails scaring people that
are working along at a good pace(2 1/2 weeks and well into a wing) and
telling them it's going to take 3000 hours don't help moral for getting the
job done! Total time depends on certain levels of mechanical inclindness(if
thats a word). I built my first street rod by the time I was turning 15 and
had to wait a year to be able to drive it. I graduated with honours in
Electro-Mechanical Engineering and have been working with my hands daily to
this date. This background allows me to build at the rate I do(and I also
run an Injection Moulding Company). When all the airframe parts are
done(wings, tail feathers and fuselage) you are basically half way there!
The other half is you engine installation, panel installation,struts,
fairings and wing tips. So base your total time by this. A paint job tackled
by yourself with an experience helper will add another 2 or 3 weeks to your
aircraft, but do it now as you will be having so much fun flying it, you
will never paint it!!!!!!! I have a large variety of aircraft at my disposal
to fly including some Ex-Yugoslavian airforce recon. aircraft. 340 H.P
Supercharged STOL Monsters, but none are as fun to fly s the trusty old
Rebel so keep on plugging away!
Regards, Wayne G. O'Shea
<!DOCTYPE HTML PUBLIC "-//W3C//DTD W3 HTML//EN">
<HTML>
<HEAD>

<META content=text/html;charset=iso-8859-1 http-equiv=Content-Type>
<META content='"MSHTML 4.72.3612.1706"' name=GENERATOR>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT color=#000000 size=2>Hello Bill and All, Wayne O'Shea here! I've
been
sitting in the back ground reading the archives for quite some time and have
decided to join the list. Not sure if it's because the archives are not being
updated or that I'm tired of Bob picking on my compression spring gear!(just
kidding Bob everyone has their own opinon of everything) </FONT></DIV>
<DIV><FONT color=#000000 size=2></FONT>&nbsp;</DIV>
<DIV><FONT color=#000000 size=2>If you have been to Oshkosh you have seen my
work, 1st Rebel built from April93 to June 1995 (976 hours crate to air) and
flown to Oshkosh '95 only to be parked in row 136 waaaay down at the end of
the
field. The last 3 years(2 of which won builders choice) you have seen Howard
Hanfords Rebel on Amphibious floats that I did considerable work on and also
fabricated and installed his floats. I have also built (in less than 700
hours)
an advanced ultralight model of the rebel(which is no different that a full
blown one other than no rear floor, the wing spars are one gauge lighter and a
Rotax 912). Currently doing final assembly on a Rebel that was basically
destroyed when cart wheeled on floats. I have completely reconstructed this
aircraft to better than new condition with a 0 timed O-320-E2D(originally
had a
Subaru) and a new Sensenich prop(ouch, 3 big bills). I also have my original
Rebel in my shop with the original O-235-C 100HP removed, and currently
reinforcing the firewall to take the 0 timed O-320-C2A I have for it.(thats a
O-320-B1 derated from 160hp to 150hp in case your curious! The engine shop
thought I was nuts, but have you ever tried finding 100LL when you are on
floats?). (my mags failed on the O-235-C and it was a good enough excuse!) I
removed the gear to facilitate installing some new lower corner wraps and
by the
way Bob the pivot holes in the gear legs are still as tight as they were in
1995.</FONT></DIV>
<DIV><FONT color=#000000 size=2></FONT>&nbsp;</DIV>
<DIV><FONT color=#000000 size=2>Cowlings!!!!! Oh yah! My original Rebel
used the
fiberglass nose bowl and 4 aluminun doors. Beautiful for inspecting and
working
on the aircraft. Does take considerable time to fabricate compared to the
speed
cowl though. When you do the nose bowl, ring the bowl with a 40thou piece of
aluminum sticking out about an inch to close the doors onto. This allows
them to
be flush with the fiberglass and not sitting on top of the fiberglass. Piano
hinge wires were replaced with one size smaller S.S. wires to facilitate
easier
installlation and removal. My nose bowl is still crackless to this point in
time, don't imagine A/C spruces supplier lays it up any better. Price would be
the key. Howard Hanfords rebel(oshkosh winner) has the speed cowl and the way
Howard had me do it is a pain in the butt when you want to remove it!
Especially
at the dock(a tarp has to be spread between floats to make sure none of the
camlocks are lost in the lake) The ultralight rebel has a lower fiberglass
section and then 2 aluminum doors on top. Works quite well as long as you
sling
the radiator on the 912 and mount the oil cooler to the engine so the lower
section can be removed. Murphy's manual has you mount the rad and the
cooler to
the cowling so you will never remove it again!!!! The rebuild that I just put
the O-320-E2D onto was done using the speed cowl. Piano hinges installed on
the
inside of the cowl, with the hinge wire slipped through the very nose of the
cowl down each side to peg the 2 halfs together. Then AN525-1032 screw around
the firewall. This is better than Howards, but still not as nice as the
original
old piper type nose bowl and 4 doors. With the old style cowl you can even
change the oil without removing any of the cowl. Just open a lower door! So if
you want sleek looks and no measurable speed increase install the speed
cowl(although you will never open it up to do maintenance until its to
late!) If
you want an installation that allows you to easily do preflights, maint.
etc use
the bowl and doors. But, as we all get lazy, still install an oil door in the
right top door panel for an easy quick oil check!</FONT></DIV>
<DIV><FONT color=#000000 size=2></FONT>&nbsp;</DIV>
<DIV><FONT color=#000000 size=2>Enough rambling, don't know how often I
will be
checking in with my work schedule, but hope I helped somehow. I will be
sending
one more e-mail seperately today regarding the tail post. Oh ya, E-mails
scaring
people that are working along at a good pace(2 1/2 weeks and well into a wing)
and telling them it's going to take 3000 hours don't help moral for getting
the
job done! Total time depends on certain levels of mechanical inclindness(if
thats a word). I built my first street rod by the time I was turning 15 and
had
to wait a year to be able to drive it. I graduated with honours in
Electro-Mechanical Engineering and have been working with my hands daily to
this
date. This background allows me to build at the rate I do(and I also run an
Injection Moulding Company). When all the airframe parts are done(wings, tail
feathers and fuselage) you are basically half way there! The other half is you
engine installation, panel installation,struts, fairings and wing tips. So
base
your total time by this. A paint job tackled by yourself with an experience
helper will add another 2 or 3 weeks to your aircraft, but do it now as you
will
be having so much fun flying it, you will never paint it!!!!!!! I have a large
variety of aircraft at my disposal to fly including some Ex-Yugoslavian
airforce
recon. aircraft. 340 H.P Supercharged STOL Monsters, but none are as fun to
fly
s the trusty old Rebel so keep on plugging away!</FONT></DIV>
<DIV><FONT color=#000000 size=2></FONT>&nbsp;</DIV>
<DIV><FONT color=#000000 size=2>Regards, Wayne G.
O'Shea</FONT></DIV></BODY></HTML>
*----------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*----------------------------------------------------*




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-----------------------------------------------------------------

cowling

Posted: Fri Feb 17, 2012 5:27 pm
by Mike Davis
I guess I need to check the archives occasionally... the problem with the
archives not updating has been fixed. I also made sure that all the
messages since the last updated were added to the archives.

Sorry for the inconvenience, Mike

----- Original Message -----
From: Wayne G. O'Shea
To: murphy-rebel@dcsol.com
Sent: Friday, October 15, 1999 5:07 PM
Subject: cowling


Hello Bill and All, Wayne O'Shea here! I've been sitting in the back ground
reading the archives for quite some time and have decided to join the list.
Not sure if it's because the archives are not being updated or that I'm
tired of Bob picking on my compression spring gear!(just kidding Bob
everyone has their own opinon of everything)

*----------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*----------------------------------------------------*




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-----------------------------------------------------------------

Cowling

Posted: Fri Feb 17, 2012 8:48 pm
by BILNEWKIRK
I have removed my "speed" cowl and am busy building a "regular" cowl.
Bob P. wrote some directions on how to do this and I am trying to follow
them, but I have a couple questions. How close together are the 'bottom
hinge of the top' and the 'top hinge of the bottom'? Should a filler be
placed between them or should the two hinges butt up against each other?
And, are there words of wisdom for forming the bottom corner wraps.

I hope this makes some sense.

Bill Newkirk

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Cowling

Posted: Fri Feb 17, 2012 8:48 pm
by Wayne G. O'Shea
Bill, if you go to my our web page and go to "services", then engine installations and then O-235, the first two pictures (clickable to full size) will give you a pretty good idea of how far apart the hinges should go. Around 3 inches on mine, but I'm not going out in the cold to measure it to make sure! As for how to form the doors. Go down to the local office supply place and by half a dozen sheets of poster board. Trim a sheet until it fits the area you need and then transfer to aluminum! Repeat for the other 3!

Regards,
Wayne G. O'Shea
www.irishfield.on.ca
----- Original Message -----
From: BILNEWKIRK@aol.com (BILNEWKIRK@aol.com)
To: murphy-rebel@dcsol.com (murphy-rebel@dcsol.com)
Sent: Wednesday, March 14, 2001 10:43 PM
Subject: Re: Cowling


I have removed my "speed" cowl and am busy building a "regular" cowl.
Bob P. wrote some directions on how to do this and I am trying to follow
them, but I have a couple questions. How close together are the 'bottom
hinge of the top' and the 'top hinge of the bottom'? Should a filler be
placed between them or should the two hinges butt up against each other?
And, are there words of wisdom for forming the bottom corner wraps.

I hope this makes some sense.

Bill Newkirk

Cowling

Posted: Fri Feb 17, 2012 8:48 pm
by BILNEWKIRK
Wayne' thanks for your reply. I had to re-format my harddrive and I no
longer have your web address. I tried Irish Field Aviation but AOL said it
didn't know you.

HELP!!!

Bill N

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Cowling

Posted: Fri Feb 17, 2012 8:48 pm
by Wayne G. O'Shea
Bill, I type it below my name every time!!! www.irishfield.on.ca
Sounds like you need a holiday!!!

Wayne G. O'Shea
www.irishfield.on.ca
----- Original Message -----
From: BILNEWKIRK@aol.com (BILNEWKIRK@aol.com)
To: murphy-rebel@dcsol.com (murphy-rebel@dcsol.com)
Sent: Wednesday, March 14, 2001 11:12 PM
Subject: Re: Cowling


Wayne' thanks for your reply. I had to re-format my harddrive and I no
longer have your web address. I tried Irish Field Aviation but AOL said it
didn't know you.

HELP!!!

Bill N

Cowling

Posted: Fri Feb 17, 2012 8:48 pm
by BILNEWKIRK
Wayne, now you see why i'm having difficulty with my cowling.

Thanks

Bill

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Cowling

Posted: Fri Feb 17, 2012 8:48 pm
by Rebflyer
Hi Wayne,
I'm nearing the end of the float project, and one question keeps coming
to mind as
I look at the top deck and ponder the type of access covers I'm going to
install. Why can't the former just forward of the rear spreader attach point
( g/h bulkhead) be removed if the proper strength is added? Have you
approached that? I'm no engineer and the possibility that I may overlook a
compression factor or a load spreading reason has stopped me from doing that.
Any idea's? I've got a couple of automotive engineers I can bug, but I
trust your judgement a little more. I think you had commented that you were
going to look at somthing like that on Howards floats. It seems you could add
chine rail material and make a nice rectangular access hole around a foot
long, tabbing the former to the chine material. Thanks in advance for your
imput. Also, any things to beware of in the float to airplane rigging? I'm
going to raise the aircraft on wing jacks desigined to raise cessnas for
retract tests. That should give me the ability to raise or lower each side
very carefully. That reminds me of another Question. I think the tail is
about 10' 6" on the float's, but how high to the top of the wings at the
tips? I might have a clearance problem in the workshop hanger. The tail will
clear ok, I'm just not sure about the wingtips
Thanks again for the time you spent giving your imput. They sure
are fun to fly, and keeping that safe is great for all of us. Curt N97MR

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Cowling

Posted: Fri Feb 17, 2012 8:48 pm
by bob.patterson
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To: <murphy-rebel@dcsol.com>
From: Bob Patterson <bob.patterson@canrem.com>
Subject: Re: Cowling


Hi Bill !

I recall the TOP channel was about 8 to 10" wide, running
from the firewall to the nose bowl in the center of the top of the
cowl, with hinges on each side of it.

The BOTTOM channel was a little wider than the carburetor
air box, and had hinges on each side of it. Both the top & bottom
hinge pins were locked in place with loops of locking wire through
the cowling, as they are seldom removed. The side wires were
long enough that the fronts were bent into an "S" shape about an
inch long. A bolt through the cowl with a spacer (or several
small washers), topped by a large penny washer was positioned
so the "S" could be lifted & bent around it. The large washer
on top held the wire in place.

A channel of .025 or heavier, about 2 to 3" wide, ran along
each SIDE, almost horizontally (slight slope upward toward the front).
This runs approximately in line with the engine rocker covers.
There was a hinge on the top & bottom of this channel. The idea
was that the channels would support the nose bowl with the sides
removed. There was a 2" or wider strip of .025 all the way around the
inside rear of the fiberglass nose bowl, with about an inch showing
at the rear. This helped stiffen the nosebowl, and made a lip to
rest the top cowls onto, so they'd be flush with the nosebowl.

All of the channels are 3/4 of a rectangle - a squared "U"
shape.

Hope that helps ...... I agree, it's hard to paint
"word pictures" !!

.....bobp

--------------------------------orig.--------------------------------
At 10:43 PM 3/14/01 EST, you wrote:
I have removed my "speed" cowl and am busy building a "regular" cowl.
Bob P. wrote some directions on how to do this and I am trying to follow
them, but I have a couple questions. How close together are the 'bottom
hinge of the top' and the 'top hinge of the bottom'? Should a filler be
placed between them or should the two hinges butt up against each other?
And, are there words of wisdom for forming the bottom corner wraps.

I hope this makes some sense.

Bill Newkirk
<HTML><FONT FACE=arial,helvetica><FONT SIZE=2>I have removed my "speed"
cowl and am busy building a "regular" cowl.
<BR>Bob P. wrote some directions on how to do this and I am trying to follow
<BR>them, but I have a couple questions. &nbsp;How close together are the
'bottom
<BR>hinge of the top' and the 'top hinge of the bottom'? &nbsp;Should a
filler be
<BR>placed between them or should the two hinges butt up against each
other? &nbsp;
<BR>And, are there words of wisdom for forming the bottom corner wraps.
<BR>
<BR>I hope this makes some sense.
<BR>
<BR>Bill Newkirk</FONT></HTML>


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Cowling

Posted: Fri Feb 17, 2012 8:48 pm
by Wayne G. O'Shea
Curt, I will send you a couple shots of Howard's "hatch" to the "step area" compartment and his aluminum lids (will upload to the list later). He made a hatch that fit between the bulkhead and false bulkhead former. He also replaced all those damn black plastic spin on lids with .040 aluminum ones. You don't need in there when using pump out cups, except to dry them out really good in the fall for winter storage (or repairs), so why put up with the plastic ones breaking etc and making the nice shinny floats looks shitty!

I don't see any reason that you can't cut out the top area of a false former to give you a big enough hatch to get a small fuel can etc, into the float compartment. The step area compartment is the best one, as you could put a couple cedar planks across the half bulkheads to make a nice dry platform for anything you want to put in there. If you do cut the false former though, I would suggest "boxing" underneath the holes edges with 3/4 x 3/4 x.125 angle to replace the strength and to make a good strong hatch mounting so it can be stepped on etc.

Just told a guy last week that you can just squeeze through a 10 foot opening on Amphibs. Blocks underneath will raise her a little bit more! The tail or a cabin roof mounted whip antenna dictates the clearance required! (Keep that in mind if you are just building and installing antenna's and have a short hanger! If short put the antenna on the cone)

When installing the floats, just make sure you get everything parallel/square,etc. to each other. Retract the gear and block the floats at the flat step area. Try to get the float decks at 0.0 degrees lengthwise and side to side. This will make it much easier to make sure your aircraft is mounted at the correct angle to the floats and not sitting "cock eyed". FWIW we mounted Howard's floats with his aircraft 2 degrees nose up in relation to the leveled float deck. Like everything else on the Rebel, this 2 degrees nose up was measured with a digital level on the outside bottom of the cabin floor. This "angle of attack" of the wing, in relation to the floats, seems to work good for him. Get the front struts pegged in place first and then play with the rear ones. I think there are a couple good pictures of this on my services page, under float installations.

See ya Sunday!?
Wayne G. O'Shea
www.irishfield.on.ca

----- Original Message -----
From: Rebflyer@aol.com (Rebflyer@aol.com)
To: murphy-rebel@dcsol.com (murphy-rebel@dcsol.com)
Sent: Thursday, March 15, 2001 8:07 PM
Subject: Re: Cowling


Hi Wayne,
I'm nearing the end of the float project, and one question keeps coming
to mind as
I look at the top deck and ponder the type of access covers I'm going to
install. Why can't the former just forward of the rear spreader attach point
( g/h bulkhead) be removed if the proper strength is added? Have you
approached that? I'm no engineer and the possibility that I may overlook a
compression factor or a load spreading reason has stopped me from doing that.
Any idea's? I've got a couple of automotive engineers I can bug, but I
trust your judgement a little more. I think you had commented that you were
going to look at somthing like that on Howards floats. It seems you could add
chine rail material and make a nice rectangular access hole around a foot
long, tabbing the former to the chine material. Thanks in advance for your
imput. Also, any things to beware of in the float to airplane rigging? I'm
going to raise the aircraft on wing jacks desigined to raise cessnas for
retract tests. That should give me the ability to raise or lower each side
very carefully. That reminds me of another Question. I think the tail is
about 10' 6" on the float's, but how high to the top of the wings at the
tips? I might have a clearance problem in the workshop hanger. The tail will
clear ok, I'm just not sure about the wingtips
Thanks again for the time you spent giving your imput. They sure
are fun to fly, and keeping that safe is great for all of us. Curt N97MR

Cowling

Posted: Fri Feb 17, 2012 8:48 pm
by Rebflyer
Thanks Wayne,
That's exactly what I was looking for in input! I may have to put the
airplane on the floats in the warm hanger, then take things back off and
redoo when the weather gets warm. Put it together, take it apart. The life
of an aircraft builder.
Thanks again, see ya Sun, one way or another. Curt N97MR

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Cowling

Posted: Fri Feb 17, 2012 8:48 pm
by BILNEWKIRK
Bob P.
Between your description and Wayne's pictures, I am well on my way. Becuase
the bottom flange on the nose-bowl I got from Spruce angles more back than
down, i'm having to work at fitting the bottom sections.

Bill N

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