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Thread: SR-71
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Old 02-06-2009, 05:04 PM
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Default Re: SR-71

Hydro - 2/6/2009 7:36 PM

Coolest plane ever designed. It was designed to do two things and it did them well; fly fast and high. I read somewhere that it leaked fuel like a sieve on the ground. But that thing probably saved some lives for us.

The SR-71 did not have conventional fuel bladders or tanks. The aircraft was designed to fly at high mach speeds which created a LOT of heat due to friction. The seams where fuel was stored, would expand and seal up the fuel leaks once the aircraft got up to cruise speed and altitude...
The seams were manufactured to be a loose fit on the ground on purpose and would expand for a proper tight fit once the airframe heated up.
The entire airframe would actually expand several inches at high speeds...