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Posted for "George Braly" <gwbraly@gami.com>:
Yes... works for both, but there is no such thing as "critical altitude" for
a normally aspirated engine.
That concept is defined for turbo-supercharged engines as being the altitude
at and above which the system is no longer able to maintain 100% of its rated
manifold pressure.
Regards, George
Isn't the "improve the critical altitude" concept also true for normally
aspirated engines? Say if you normally cruise at 75% power... and you
are at 5000 ft at 24X24 and you pull the ram air...your MAP goes up 1.5
inches...in order to get back to 75% you pull the MAP back 1.5 inches to
24??? So the advantage is above 8000 ft. Right?
[ or running more than 75% power -Rob :-)
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