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Author Topic: Impetus "key"...  (Read 3262 times)

iacob alex

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Impetus "key"...
« on: October 11, 2011, 02:08:16 PM »

.....or more precisely a certain velocity,opens the flight's "gate":the take-off speed ,when the aircraft may safely become airborne.

    If we understand that the "lifting" velocity is a  prime -working prerequisite   for flight ,why not to think alike (free-fall/downward velocity ?!) about a possible gravity self-moving device ?!

      All the best! / Alex