Unlike a piston engine the rotary has no exhaust valves to worry about
 burning so this is a very viable way to reduce the exhaust temp and
 improve the MPG as Tracy Crook has demonstrated. If you screw up running
 lean of peak with a piston engine you risk burning an exhaust valve.

 BTW This is a very important side benefit of EFI with manual leaning as
 compared to motorcycle or automotive carbs without leaning capabilities.

 Tracy's EFI design has this manual leaning capability.

The one thing that you do have to worry about with leaning is detonation.
When I bought my engine the guy showed me one that he was a bout to rebuild
because of detonation caused by a transiently lean condition.  The detonation
caused the front housing to rotate relative the rear, shearing 2 tension bolts
and cracking both rotor housing and front and rear housings.  The good news
is that this was a race engine run at very high boost, so it probably wont
apply to most of our applications.  The other good news is that the
intermediate housing, both rotors and e-shaft were un- dammaged !!!

Dave Leonard

 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.

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