Innovative Helo Update

Flight International is reporting that Sikorski's X2 technology demonstrator is doing ground tests on its rotor system, and that Boeing's A160T helo drone set an endurance record (18.7 hours) this month.

The former uses coaxial blades to offload the retreating blades, and allows for increased top speed, and the latter uses a variable speed rotor to increase efficiency to match the needs of the specific flight regime.

X2 technology demonstrator


A160 T