What is the sound of one piston slapping?
What is the sound of one piston slapping?

A couple of recent videos of general Oppo interest.

First, about the first powered flight on another planet, a helicopter drone NASA hopes to get to Mars soon.

Second, as someone here put it, the diesel brown manual wagon of the Air Force. Brrrrrrraaap.

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Tidbit that’s perhaps common knowledge: the gun is so powerful it cuts the plane’s forward thrust in half.

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