The averages for the trips from Laramie, WY to Paducah, KY
combined with the trip last weekend from Laramie to Weatherford, OK are:
|
nm
|
hr
|
gal
|
nmpg
|
gph
|
oz
oil
|
oz/gal
|
nm/hr
GS
|
|
2736
|
18.9
|
150.0
|
18
|
8.0
|
129
|
0.9
|
145
|
|
total
|
total
|
total
|
ave
|
ave
|
total
|
ave
|
ave
|
The engine is a 1986 13B, NA. Cruise MAP was in the range of
20-22 “ Hg. The Dynon indicated TAS from 145 to 155 kt.
Cruising altitudes varied from 3500 to 10500 ft. Static RPM was 5000 RPM
with a 2.18 reduction drive and an Aymar Demuth 69 x 73 prop. Cruise
RPM near 5400. Coolant temp of 180 deg F, oil temp of 175 deg
F. The oil metering pump is used with a separate reservoir of 50% 2 cycle
oil, 50% MMO.
Steve Boese
From: Rotary motors in
aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ed Anderson
Sent: Wednesday, October 06, 2010 6:21 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Sam Hodges Prop area Comparison
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.
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?
-----
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