In the 1480s, Italian Renaissance artist and inventor Leonardo da Vinci came up with an ingenious design for an “aerial screw.” A rotor in the shape of a helix measuring about 13 feet in diameter, the ...
NASMRB copy 39088001801703 bound in publisher's red cloth. National Air and Space Museum-Library stamp on t.p. Contents Ch. 1. Evolution of the two-surface flying machine -- ch. 2. Theory development ...
A lot of personal flying machines are in the works right now, but this one from Washington-based startup Zeva Aero surely features one of the most extraordinary designs yet. The Zeva Zero aircraft ...
A quadcopter drone that uses ancient technology instead of modern propellers made a huge impression at the recent Transformative Vertical Flight conference. University of Maryland graduate student ...
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