The SB-1 Defiant promised to revolutionize military rotorcraft with coaxial rotors, a pusher propeller, and modern digital ...

Research and data obtained during the testing of these and other experimental aircraft would lead to today's B-2 Spirit bomber and beyond. Project MX-140 and the N-9 American concerns that Great ...

The Turkish Land Forces Command has officially inducted the domestically developed Havelsan Baha vertical-take-off and landing (VTOL) unmanned aircraft system ... electrically driven propellers for ...

An artist's impression of the Baha unmanned aircraft in service ... with four electrically driven propellers for VTOL flight and one electrically driven pusher-propeller for forward flight.

It operates with the landing and takeoff versatility of a helicopter, the quiet of an electric vehicle, and the cost advantage and safety of a fixed-wing, fixed-propeller aircraft. With the EL9, ...

It operates with the landing and takeoff versatility of a helicopter, the quiet of an electric vehicle, and the cost advantage and safety of a fixed-wing, fixed-propeller aircraft. With the EL9 ...

The team argues that for future propeller aircraft design it would be wise to look at noise reduction systems and vibration dampening materials. Noise-cancelling headphones could be made available for ...