"Boomer" wrote in message
...
VERY interesting stuff guys thanks :-)
was wondering this: F-15 has nacelles that physically move externally,
whereas F-14 is fixxed externally yet they have somewhat similar
performance
in the upper right of the envelope. How does the F-14 deal with reducing
ram
drag ? It appears the F-15 can simly move it's nacelles down to restrict
air
flow. I know F-14 has shock ramps inside to deal with the shock wave, but
what does it do about ram?

This is a pretty good graphic of the system.
http://www.anft.net/f-14/f14-detail-airintake.htm

OBTW, the F-14A programming optimized performance at the upper end and
(theoretically) could outaccelerate an F15A above 1.6 or so. Ramp
reprogramming, elimination of the glove vanes, and some additional drag
counts make the F-14B (and moreso the D) slower above 1.6 than the old A
with significantly less thrust. OTOH, the B and D have their ramp
scheduling optimized for real world tactical requirements. They're awesome
in the transonic range. A clean F-14B/D can exceed both its NATOPS and
manufacturer's KIAS placard limits, even if they're barely mach 2 capable
(if that, I've heard 1.9).

R / John