Eric,
    Is that fuel burn ratio's 13.1:1 to 13.4:1 at WOT?
    George (down under)


    George,

    13-1 at WOT is pretty close number. We will have more dyno, test
    stand, and
    in flight data in the coming months.

    Eric Barger



I know this is probably picking nits, but I'd like everyone to think
about mixture (fuel-air) in terms %power (or best-power) instead of
throttle position (re "WOT" in this message).  Throttle position -
especially on the rotary which runs well over a wide range of mixture
settings, is only a portion of the description or power output.

WOT should be thought of as "best volumetric efficiency" not "best
power" - though best power generally happens at WOT.

So, it sounds like Eric is saying that he sees his engines making best
power at mixtures around 13:1.

Side question Eric:  Does your engine test setup allow easy inflight
setting/adjustment/control of the fuel-air mixture?  As has been
discussed here in the past, this is critical for optimizing engine
performance (efficiency) lacking some kind of really smart FADEC system.


Regards,

Matt-

Matt,
I agree, I asked the question as I thought best power for the rotary was
12.65:1.
I intend running a carb with a wide band O2 sensor and a digital display
monitor/readout.
No good having a leaning knob, unless you can see what the fuel air ratio
is - my opinion only FWIW.
George (down under)



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