Hi Paul:

I have been following the rotary engine discussion for a few months now.

My particular interest is in 40 to 50 hp rotary engines as I am looking for the most light weight and efficient engine for an ultralight airplane.

I came across the Advanced Innovative Engineering rotary engines a few days ago and they look pretty good.

I am sending this email as a query - do you know anything about the AIE rotary engines?

In advance, thank you,

John Douglass

Not much. I have seen them and heard about them.

Unfortunately small and efficient are conflicting right at the moment. Most small rotary engines use
charge cooled rotors or pumped air rotor cooling. The BSFC is in the range of .5 to .6 pounds
of fuel per HP per hour while the oil cooled rotor Mazda is in the range .45 to .5.

Of course they are better than a 2 cycle which is in the range of .60 to .70.

Paul Lamar

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