Prince Prop

[Dale Kopff]

----- Original Message -----
From: <bransom@dcsol.com>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, February 17, 2004 7:08 PM
Subject: Re: Prince prop

Dale,
You mention the possibility of better performance, but aren't you already
there with max power rpm under red line at cruise? Do you mean you wish

you

had larger diameter, finer pitch, so as to get better low speed thrust at

the

possible expense of some cruise speed?
-Ben Ransom ...a long way from buying a prop

Ben,
I was thinking of better low speed thrust.
Dale

-> The static rpm is 2300, climb is 2350, full power 2600/115mph. I could

have

-> better performance if I had used a finer pitch or a larger diameter.

Check

-> with Lonnie Prince.
->
-> I purchased the prop through Murphy, and the spacer from Saber. The
-> Sensenich spacer will not work with a wood or carbon prop and is more
-> expensive.
->
-> Not only does the Prince out perform my Sensenich, it is 25lbs lighter.
->
-> Dale
-> N295RT
-> >
-> >
-> >
-> >
->

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[Dale Kopff]

----- Original Message -----
From: "Walter Klatt" <walter.klatt@shaw.ca>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, February 17, 2004 7:28 PM
Subject: RE: Prince prop

Dale, what climb rates (at a given weight) are you getting?
Sounds like you could increase your performance further with a
pitch that would let you rev a little higher on take-off and
reach 2700 at the top end.

Walter

I agree with you. At gross weight, 70degrees, 1500-2500msl, 70mph, full
power/2350rpm, my rate of climb was timed at 630fpm. Cruise at 2300 was
105.
Dale

-----Original Message-----
From: mike.davis@dcsol.com
[mailto:mike.davis@dcsol.com]On Behalf Of
Dale Kopff
Sent: Tuesday, February 17, 2004 8:35 AM
To: murphy-rebel@dcsol.com
Subject: Re: Prince prop



----- Original Message -----
From: <Legeorgen@aol.com>
To: <murphy-rebel@dcsol.com>
Sent: Monday, February 16, 2004 10:15 AM
Subject: Re: Prince prop

Dale,

On amphibs you must be using their carbon fiber with

edge protection?

Bruce, Jerry

My engine is a Lycoming 160hp. The prop is wood core,
carbon fiber skin
with leading edge protection, which is not needed with
the 74 diameter.There
is no indication the water is getting to the prop. If
a larger diameter is
used it would be required. I would ask Lonnie Prince
what diameter and
pitch would be best for a given plane.

Lonnie recomended a 74-44 to be a equal to my
Sensenich 74-56. The 44 pitch
is a equal because of the semitar shape, the P-tips,
and because the blades
cone forward under power.

The static rpm is 2300, climb is 2350, full power
2600/115mph. I could have
better performance if I had used a finer pitch or a
larger diameter. Check
with Lonnie Prince.

I purchased the prop through Murphy, and the spacer
from Saber. The
Sensenich spacer will not work with a wood or carbon
prop and is more
expensive.

Not only does the Prince out perform my Sensenich, it
is 25lbs lighter.

Dale
N295RT
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[Dale Kopff]

----- Original Message -----
From: <Legeorgen@aol.com>
To: <murphy-rebel@dcsol.com>
Sent: Tuesday, February 17, 2004 8:56 PM
Subject: Re: Prince prop

dale

It sounds like you could have had a slightly finer pitch to get better

climb

and 2700 RPM redline at full throttle. Your not getting full power at 2600

RPM.

Bruce

I agree with you.
Dale
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[Clay Smith]

I'd like to get some more info and opinions about the Prince prop. I'm
told that there are at least 8 Rebels out there using this prop. Dale,
are you still happy with your prop? Did you get it re-pitched? Who
else has this prop? Maybe I could contact you and others regarding this
prop privately ... so as not to bore the rest of the group too much ..?


Thanks,
Clay



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[Drew Dalgleish]

Please bore us I'm interested in that prop too.


At 08:36 PM 8/19/2004 -0230, you wrote:

I'd like to get some more info and opinions about the Prince prop. I'm
told that there are at least 8 Rebels out there using this prop. Dale,
are you still happy with your prop? Did you get it re-pitched? Who
else has this prop? Maybe I could contact you and others regarding this
prop privately ... so as not to bore the rest of the group too much ..?


Thanks,
Clay

Drew





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[Robert and Olga]

I agree - bore us - we all like to learn better ways - maybe I can get rid
of my 38 lb Sensenich and climb "better" then 2000 ft per min. Bob J Rebel
652 ( also planning Orillia)




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[Dale Kopff]

----- Original Message -----
From: "Clay Smith" <cbsmith@nf.sympatico.ca>
To: <rebel-builders@dcsol.com>
Sent: Thursday, August 19, 2004 6:06 PM
Subject: Prince Prop

I'd like to get some more info and opinions about the Prince prop. I'm
told that there are at least 8 Rebels out there using this prop. Dale,
are you still happy with your prop? Did you get it re-pitched? Who
else has this prop? Maybe I could contact you and others regarding this
prop privately ... so as not to bore the rest of the group too much ..?


Thanks,

Clay

I love my Prince prop, which is 25 lbs lighter than my sensenich (I sold the
prop), delivered 70 lbs more thrust @ 2300 static / sensenich @2400 rpm,
l00fpm better rate of climb. Both props full power indicated 115mph
@2600. I plan on having Prince repitch the prop to 2500rpm at static for
additional performance.

Dale

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[Clay Smith]

Hi Dale,
Did you use a spacer with this prop? If so where did you get it? How much?
Lonnie at Prince recommends Saber Manufacturing for prop extensions and
spacers. (Mam is recommending the use of a 1" extension for the nosebowl /
metal cowl) Also, Lonnie indicated that he would re-pitch his prop at no
charge until the customer is satisfied. Is that the case? At 115 mph
cruise my guess is that you are not on floats? What type of spinner did you
go with. Is there any chance of getting a picture of your set up?
Thanks for your help.

Clay
----- Original Message -----
From: "Dale Kopff" <dkopff@earthlink.net>
To: <rebel-builders@dcsol.com>
Sent: Friday, August 20, 2004 9:38 AM
Subject: Re: Prince Prop

----- Original Message -----
From: "Clay Smith" <cbsmith@nf.sympatico.ca>
To: <rebel-builders@dcsol.com>
Sent: Thursday, August 19, 2004 6:06 PM
Subject: Prince Prop

I'd like to get some more info and opinions about the Prince prop. I'm
told that there are at least 8 Rebels out there using this prop. Dale,
are you still happy with your prop? Did you get it re-pitched? Who
else has this prop? Maybe I could contact you and others regarding this
prop privately ... so as not to bore the rest of the group too much ..?


Thanks,

Clay

I love my Prince prop, which is 25 lbs lighter than my sensenich (I sold

the

prop), delivered 70 lbs more thrust @ 2300 static / sensenich @2400 rpm,
l00fpm better rate of climb. Both props full power indicated 115mph
@2600. I plan on having Prince repitch the prop to 2500rpm at static for
additional performance.

Dale

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[Dale Kopff]

----- Original Message -----
From: "Clay Smith" <cbsmith@nf.sympatico.ca>
To: <rebel-builders@dcsol.com>
Sent: Friday, August 20, 2004 9:19 AM
Subject: Re: Prince Prop

Hi Dale,
Did you use a spacer with this prop? If so where did you get it? How

much?

Lonnie at Prince recommends Saber Manufacturing for prop extensions and
spacers. (Mam is recommending the use of a 1" extension for the nosebowl

/

metal cowl) Also, Lonnie indicated that he would re-pitch his prop at no
charge until the customer is satisfied. Is that the case? At 115 mph
cruise my guess is that you are not on floats? What type of spinner did

you

go with. Is there any chance of getting a picture of your set up?
Thanks for your help.

Clay

I purchased my spacer from Saber, the spinner from aircraft spruce and
specialty.. I am on amphibious floats, the 115mph was at full power. My
cruise is 105 indicated.
Dale

----- Original Message -----
From: "Dale Kopff" <dkopff@earthlink.net>
To: <rebel-builders@dcsol.com>
Sent: Friday, August 20, 2004 9:38 AM
Subject: Re: Prince Prop

----- Original Message -----
From: "Clay Smith" <cbsmith@nf.sympatico.ca>
To: <rebel-builders@dcsol.com>
Sent: Thursday, August 19, 2004 6:06 PM
Subject: Prince Prop

I'd like to get some more info and opinions about the Prince prop.

I'm

told that there are at least 8 Rebels out there using this prop.

Dale,

are you still happy with your prop? Did you get it re-pitched? Who
else has this prop? Maybe I could contact you and others regarding

this

prop privately ... so as not to bore the rest of the group too much

..?

Thanks,

Clay

I love my Prince prop, which is 25 lbs lighter than my sensenich (I sold

the

prop), delivered 70 lbs more thrust @ 2300 static / sensenich @2400 rpm,
l00fpm better rate of climb. Both props full power indicated 115mph
@2600. I plan on having Prince repitch the prop to 2500rpm at static

for

additional performance.

Dale

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[indabush]

Steve, Hank ...

Here are some numbers with the O-320 / Prince 74x47:
Static RPM (tail tied down) 2,500
Rate of climb at 1,800 pounds gross from climb test report 755 fpm
(Pressure altitude 920 ft)
Cruise speed (two people, weight about 1,550; 2,400 RPM) 103 to 105
mph CAS
Max RPM at cruise >2,700
Max rate climb speed Vy is quite a bit higher than the manual says - 80-85
mph CAS versus 69 at 1,650 pounds

The fact that the engine will over-rev in cruise and the cruise speed is
low, definitely suggests too fine a pitch. You don't need 2,500 rpm on
take off either. I am starting to think that I have a lot of cowling /
cooling drag, although temps are very good.

Mike A / C-FNBO





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