jetavator

A control surface that may be moved into or against a rocket's jet stream to change the direction of the jet flow for thrust vector control. The jetavator is a variation of the jet-vane used on early rockets such as the V-2 and Redstone, to provide stabilization at takeoff. The jetavator is a ring p...
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jetavator

control surface for deflecting rocket exhaust
Found on http://phrontistery.info/j.html
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