On a helicopter, lift, or upward movement in the air, is produced by a copter's propellers, which are called rotors. If a helicopter had only the large main rotor on top of the craft, it would spin in ...
2014 was a year that yielded many of advances in military aviation. Here is a look back at the public debut of three exciting new helicopters as well as the U.S. Army’s reveal of breakthrough tech for ...
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