In the world of drones, propeller choice is key to performance. Selecting the right props can have a major effect on things like flight time, vibration, and a whole host of other factors. Thinking it ...

ZF Marine Group, provider of marine propulsion technology, has added bow thrusters to its pleasure craft product range. The innovative design incorporates counter-rotating propellers in a patented ...

High-concept MAV takes off with fixed wings and counter-rotating propellers, allowing it to operate with high aerodynamic efficiency--even in adverse conditions, according to its creator. The military ...

The An-70 transport is a high-wing aircraft powered by four 14,000-shp ZMKB Progress D-27 propfan engines with six-blade counter-rotating propellers. Maximum payload is 103,615 lb. Two An-70 ...

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 ...