Ram air
"Tina" wrote in message ...
The m20J is pretty slippery already and when it was introduced in the
70s was a big step up in efficiency in a production airplane.
Homebuilts do do an even better job of cleaning up aerodynamically.
The little seals on the flaps and so on were lipstick, the real gain
over the Mooney Executive had to do with the 201 getting a more
aerodynamic windscreen and engine cowling.
We have no serious complaints at all about the airplane (well, in a
rainstorm getting in without getting the seat wet is difficult,
checking the fuel is hard on pantyhose sometimes) but finding a couple
more inches of manifold pressure would be very handy when trying to
get to 12000 feet quickly. Once there, we can sip 8 gallons an hour
and move along pretty well.
I think using ram air would not increase aerodynamic drag, B. Instead
of having the air moving at the airplane's airspeed plus prop induced
speed impacting the cowling, it could in fact be going into a hole.
It's only a 360 cubic inch engine turning at 2300 RPM or so. Isn't
that a demand of, let's see, at 23 inches mp at sea level that's
23/30 * 2300/2 * 360 / 12^3 or 180 cubic feet a minute?
I better leave that to the engineers.
Yes, you are sucking it up as you are trying to push it in, the air that is, and the free airstream is not a very good
'pump'. A turbo with its sealed compressor is much better because once the air is captured it really has a hard time
flowing out backwards.
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