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On my way back from Paducha, I flew at 7500 MSL, 22 " Hg
MP, 5900 rpm, 8.5 GPH and trued out at 168MPH with a 74x88 Performance
Prop. My static on that day was 6000 rpm, estimate OAT at 70F. My
chord is 5.5". H2O was 180F, Oil 175F. H20 10-12PSI.
Ed
Sent: Wednesday, October 06, 2010 6:35 PM
Subject: [FlyRotary] Re: Sam Hodges Prop area
Comparison
I have a Catto 76X88 composit 2 blade propeller on
my Renesis powered RV-7A. Last time I tried a full power static RPM test
was in June - OAT 90 deg. Relative Humidity 70%. My static was
5730 RPM. The cord on my prop is 6.0 inches max.
My cruise #'s at 9500 ft. alt. returning from
New Mexico to Austin last week were: RPM - 6181; MP - 20.2 in hg. (not
quite full throttle); 172 mph TAS; fuel flow 9.3 gph; H2O - 177 deg;
oil - 191 deg. OAT was about 75 deg.
Does anyone have similar numbers for RV-6 or 7's
with rotary engines they would share for comparson?
Thanks,
Dennis Haverlah
----- Original Message -----
Sent: Tuesday, October 05, 2010 8:09
PM
Subject: [FlyRotary] Re: Sam Hodges Prop
area Comparison
Ed,
I
checked today, and mine has an 8.25 (quickly measured, not accurately)
cord. Time will tell about what RPM I get and if I will have to trim the
prop. I’m reminded of the line from the movie “Guys and Dolls”. I
don’t think I want to take the bet and end up with an ear full of
cider.
I
got the new radiator today, so bracket construction and installation can
begin.
Chris
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