"JGalban via AviationKB.com" u32749@uwe wrote in message
news:88dfc4ab63e88@uwe...
Dale Harris wrote:
There\s no reason why quiet
four stroke engines with computerized fuel injection and automobile style
mufflers couldnt be used which are as quiet as an automobile
accellerating.
And with AutoGiros there's a good chance that runways and airports aren't
even needed, a PAV could land right in the street, the only thing they
would
need to do is clear all the trees.


Not sure how computerized fuel injection would make a difference in the
noise output. My plane has two mufflers on the exhaust and the engine is
pretty quiet already. The vast majority of the noise comes from the prop
slicing through the air.

It wouldn't make a difference in sound output, at least not a whole lot, but
since the engine runs smoother it may be somewhat quieter.

The big plus with fuel injection is that the pilot doesn't have to adjust
the fuel mixture.


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