The aircraft manufacturer, Lockheed Martin, initially wanted the SR-71 to use liquid hydrogen as fuel — similar to the space shuttle's main engines — but abandoned the idea because it would have required huge amounts of fuel.
The aircraft manufacturer, Lockheed Martin, initially wanted the SR-71 to use liquid hydrogen as fuel — similar to the space shuttle's main engines — but abandoned the idea because it would have required huge amounts of fuel.
https://www.space.com/16666-sr-71-blackbird.html
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