>
> Miles,
> Can you summarise specifically what the Sport Aviation findings were?
> (rather than sending us all scurrying to a competitor magazine of yours!).
>
>
My copies of the mags are buried in boxes in storage - however from
memory...
Thrust is proportional to mass flow (still benefits if you use a turbo)
outlet is parallel to airstream, and benefits from reducing outlet area
(tapering down final few inches of outlet at, I would guess, less then 7)
exact dimensions are calculated for a specific altitude.
worth a try, I'd say - friend in the US who has been experimenting reckons
about 8-10% benefit at very specific parameters if it's optimised - his PA28
does 140Kt @ 75% @ 8000 ft DA. (also done a lot of aerodynamic cleanups...)
try emailing the CAFE foundation - I think they've been on the case
M
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