uncleflo
Registered since September 28th, 2017
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The heart of the SR-71 : the J-58 engine. Development
Saved by uncleflo on June 20th, 2014.
The Blackbird was the only aircraft ever to be designed around the J-58 (JT-11). This turbojet engine had been developed for a USN project, by Pratt & Whitney, at their West Palm Beach R & D center in Florida. Eventhough its existence remained a secret until revealed on 28th February 1964 by US President Lyndon B. Johnson, that of the JT-11 engine was already known to specialists.
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The SR-71 Pratt & Whitney JT11D-20B J58 Engine
Saved by uncleflo on June 20th, 2014.
The SR-71 Blackbird is powered by two Pratt & Whitney J-58 turbo-ramjets, each developing 32,500 pounds of thrust with afterburning. The critical problems concerning supersonic flight with air breathing engines are concentrated in the air inlet area. The circular air intakes of the SR-71 contain a center body tipped with a conical spike. The spike is movable, forward for takeoff and climb to 30,000 feet after which, as speed builds up, it moves rearward, controlling the amount of air entering the engine. As it does so, Air Inlet Bypass Doors in the side of the nacelle close to establish the correct flow of air through the engine, holding the supersonic shock wave in it's critical position within the inlet. The engine itself operates at subsonic speed.
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SR-71 Blackbird follow-up: A new TERRIFYING Mach 6 spy-drone bomber • The Register
Saved by uncleflo on June 3rd, 2014.
Pics The famous SR-71 Blackbird was put out to pasture over a decade ago – but the legendary Skunk Works aviation wizards that built it have been showing off a replacement that can travel twice as fast and it could be in the skies within a decade. The SR-72 will be unmanned, saving a lot of the weight needed to keep the two fleshy pilots of its predecessor alive and functional, and will be able to cruise at high speeds for aerial reconnaissance. It is also being designed to have offensive capabilities that would make it the ultimate in fast bombers.
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