Ok, John,
The engine knows what it likes. However, if
accurate - an A/F of 15:1 should show you a fuel flow of approx 10.5-11 GPH (at
5000 rpm WOT) producing approx 117 HP. An A/F of 12.65:1 (Best Power)under the
same rpm should show a fuel flow of approx 12.5-13 GPH producing around
135-140 HP.
I find that on take off on a nominal day I
typically show between 17 and 18 GPH on a cold day as much as 19-20 turning
6000 rpm (with a 2.85:1 RWS redrive)
Ed
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of John
Sent: Sunday, June 14, 2009 8:05
AM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Water Temps
Tracy, your
temperature cutoff makes me feel a little better. Yesterday I checked the
crankcase and there was no sign of glycol odor or glycol. I ran the
engine .2th's hour taxing trying to get used to the not having a steerable nose
wheel, the brakes were considerable cooler. OAT was at 78, with cowling
off and moving the WT was 165 degrees.
On Ed's question of the air - fuel ratio, I have a meter and
sensor from Edelbrock and with the 1:15 light on, the engine runs the
best, as for the accuracy of the instrument, who knows.
At one time a while back there was much discussion on
prop's, the prop I have is a Fred Felix bi-cambered of 68 x 70, as I recall it
was mentioned about prop stall, would I be experiencing this, as the engine
will go from idle to 5,000 rpm almost instantly, sure is different than the ole
Lycoming in the Piper Colt.
The Marcotte re-drive has the filler plug at a level where
nearly 90 % of the ring and pinion is submerged in 80 hypoid. The surplus
grease was dispelled out the vent on the overflow bottle and ran down the
firewall, very small amount of 80w makes awful big mess. JohnD
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