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Old 19th October 2005 | 03:32
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Brian Abraham
 
Joined: Aug 2003
Posts: 3,833
Likes: 2
From: Sale, Australia
Sr-71

Reading a book written by an SR-71 pilot and says "At Mach 3.2 cruise, over 80% of the thrust created comes from the inlet, 20% from the engine."

I realise at this speed the the engine is basically a ramjet and the flight manual quotes "At high altitude, military thrust is approx 28% of the maximum thrust available."

What I'd like is an explanation of (how? aerodynamics? mechanics of?) is the inlet providing 80% of the thrust.

Question for John Farley or those of his ilk?

Blue Skies,
Brian
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