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 ...

WASHINGTON (Reuters) - Northrop Grumman Corp (NOC.N) has won a contract worth $93.08 million to build a full-scale demonstrator of a new unmanned spy plane - a flying wing with large 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 ...

Initial performance and noise studies conducted in the wind tunnel show that an open rotor engine with counter-rotating propellers in pusher configuration will have margin for Stage 4 operations and ...