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Date: Thu, 16 Jun 2011 23:32:38 -0400
From: Ernest Christley <echristley@nc.rr.com>
Reply-To: echristley@att.net
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Steady running
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This should make Kelly happy 8*)

http://www.youtube.com/watch?v=_qJJqDJwMWM

I need to add some pitch to that prop.  5500 rpm and it doesn't even 
start to pull the airplane. The engine is running much richer than I'd 
like at the moment, but with it running this smoothly across the rpm 
range, I have a good place to start.

I found one more small oil leak in my gearbox, but it should be simple 
to fix.

The big problem is that the front rotor is running as much as 300 
degrees cooler than the rear.  After reviewing how my manifold is 
set-up, I think this should have been obvious.  I have the air exit the 
throttle body, directly into the manifold, so that the air blows across 
the openings for the four runners.  The air would dam up at the rear of 
the manifold, and that is where the opening for the hot rotor is.  I'll 
have to do some composite rework to give a similar airflow to both rotors.