Is there a relationship/ formula that shows the relationship of octane
to BSFC?  What would be the minimum octane for a rotary?  See ya in
Oshkosh.

Barny

If there is I don't think it is a strong relationship with a fixed
compression ratio. The compression ratio does not seem to be as
important in a Wankel rotary. The rotary reputedly will run on kerosene
if you can get it started. Aircraft people run anything from car gas
through 100LL aircraft fuel quite happily. I don't know
if Tracy has ever run low octane car gas. Tracy?

Paul Lamar
 
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