David
All true. I must admit that making the prop (per Alvin Schubert) was probab
ly my favorite part of building the Piet so far. I did build it 66 inches,
with the intent of trimming an inch or two to get more RPM if needed. I wil
l have to see what more RPMs but a smaller disk does to the thrust. Experim
ental aircraft right!
Malcolm Morrison
----- Original Message -----
From: "David Paule" <dpaule@frii.com>
To: pietenpol-list@matronics.com
Sent: Thursday, November 19, 2009 9:17:49 PM GMT -05:00 US/Canada Eastern
Subject: Re: static thrust
=EF=BB
A lower-pitch prop will give you higher static RPM and greater static thrus
t. If you are otherwise happy with the prop, that's the only change needed.
Besides, your next prop will be faster to make and possibly better, right?
David Paule
----- Original Message -----
From: gliderx5@comcast.net
To: pietenpol-list@matronics.com
Sent: Thursday, November 19, 2009 6:37 PM
Subject: Re: static thrust
Dan
I have the results of my static thrust testing at http://home.comcast.net/~
mmorrison123/engine_test.html . Corvair with a homemade prop. 2500 RPM stat
ic giving 280 lbs thrust. I spoke with William Wynne at Oshkosh, and he ind
icated that for a Piet I should be more like 2700 RPM and 350 lbs thrust. I
may look at getting a Warp prop. It is highly likely that the factory can
make a better prop than I can.
Malcolm Morrison
----- Original Message -----
From: helspersew@aol.com
To: pietenpol-list@matronics.com
Sent: Thursday, November 19, 2009 7:49:50 PM GMT -05:00 US/Canada Eastern
Subject: Re: static thrust
Gentlemen,
Has anyone done a static thrust test on their flying airplane (or almost fl
ying?). I have measured 265 lbs. with my Model A and my 76/46 prop. I would
be curious how this stands up to others.
Dan Helsper
Poplar Grove, IL.
href="http://www.aeroelectric.com">www.aeroelectric.com
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href="http://www.homebuilthelp.com">www.homebuilthelp.com
href="http://www.matronics.com/contribution">http://www.matronics.com/chr
ef="http://www.matronics.com/Navigator?Pietenpol-List">http://www.matroni
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