TIANJIN, China — Avicopter is developing a technology demonstrator for a high-speed helicopter, adopting a compound configuration that combines coaxial rigid rotors and nose-mounted counter-rotating ...
Readers have expressed their worries about the logistical burdens of counter-rotating propellers and gearboxes on the Airbus Military A400M (AW&ST Sept. 15, p. 9; Aug. 18/25, p. 12). Controllability ...
“Swarm Man” takes to the sky — er, several feet off the ground — in a DIY super drone that sounds like an army of bees. The homebuilt flying machine is equipped with 54 counter-rotating propellers ...
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