There’s a lot to be said for determination. Two years ago, a contraption that looked a bit like a bouncy ball attached to a clothesline, took flight in a pioneering experiment in the German ...
Half-breed: Piasecki Aircraft has taken a Sikorsky helicopter and bolted on airplane hardware — a propeller (ducted) and a fixed wing — hoping the resulting X-49A SpeedHawk (top) will bust through the ...
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