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copbait73 copbait73 is offline
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Join Date: Nov 2003
Location: Chesterfield IN
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Originally Posted by Tippy View Post
Ok, what is F/A? I'm an A&P, and this isn't ringing a bell?
I was using F/A to be fuel - air ratio. Typically what one is monitoring with O2 exhaust sensor.

This really is an old discussion relating to recognition that simply balancing the fuel flow per cylinder does not take into account the fact that all manifolds will display unequal air distribution.

Adding on recognition that to blueprint an air-cooled engine one needs to sample CHT because this describes knock resistance and thermal limitations. Turbo engines are ultimately limited by their fuel octane, pressure differentials and heat effects (heat rejection) to the engine system.

As an A/P you should read up on what is happening in Unlimited Air Racing with internal water injection (old stuff) but also newer use or external spray bar cooling. Fascinating stuff pointing toward potential usage on our old school air-cooled performance engines.
Old 02-27-2017, 07:31 AM
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