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— — - The Pratt & Whitney J58 powered the SR-71 Blackbird to sustained Mach 3 flight. It was essentially a hybrid engine, with a turbojet inside a ramjet. The tubes on the outside, 3 on each side, are part of the ramjet.
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The Pratt & Whitney J58 powered the SR-71 Blackbird to sustained Mach 3 flight. It was essentially a hybrid engine, with a turbojet inside a ramjet. The tubes on the outside, 3 on each side, are part of the ramjet.

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