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PostPosted: Sat Jan 14, 2006 4:50 pm
by Shannon
Clarke Vs. P-tip

PostPosted: Sat Jan 14, 2006 4:50 pm
by Shannon
Pic 2

PostPosted: Sat Jan 14, 2006 4:52 pm
by Shannon
Pic 3

PostPosted: Sun Jan 15, 2006 10:46 pm
by Guest
Thanks for the photos Shannon.
Looks like thicker airfoil with higher co-efficient of lift with corresponding higher drag which would explain lower rpm. Did you get to try them on the plane?
I can cruise at 40 mph with rpm around 4000. Usually run a little slower to conserve fuel and I find when the weather starts to kick up the slower speed seems to be quite comfortable. Just there to see the sights. Always surprised to see how little turbulence will keep some of the locals out of the air. They don’t seem to enjoy thermals.

Glen

PostPosted: Sun Jan 15, 2006 10:49 pm
by gdewsbury
P.S.

Max rpm is around 4800 satic.

PostPosted: Mon Jan 16, 2006 1:26 am
by Shannon
Hi Glen, No problem.

Yes, you nailed it. The Clarke has a thick airfoil cross-section and rather "blunt" leading edge.

Shannon

PostPosted: Fri Jan 27, 2006 3:28 pm
by pittsnut
Not much to add about the differences.

I have ran both of them, now have carbon fiber "P" tips. They run great, nice and light, turn up at 4900, no single engine performance like was stated.

I also have a set of "hand carved", Glen and others saw these at the 2001 UPAC fly-in. They are very thin, 34 inches, do not know the pitch.

I know John Clarke, he is a model maker, prop machine is in the basement. He can make any prop you like if you send one to copy. He has made many custom model props for me in the past and they are all pretty good.

For now, I am sticking with my P tips.

Its good to have the 185's rpm a bit higher than lower.

Later

Dale

PostPosted: Mon Aug 07, 2006 2:14 pm
by yankeflyer
Hi Guys

I need a link to the P Tip sales

PostPosted: Mon Aug 07, 2006 9:15 pm
by yankeflyer

PostPosted: Mon Aug 07, 2006 9:46 pm
by yankeflyer
$12.50 an inch? = how much for two new p tip props