“Variable-speed inverter drive technology allows for quieter operation due to inverter compressors, which allow for more ...

For boats, a propeller used for propulsion can either interact with the water or the air through which the boat is moving. Both modes have been used with the air propeller being favored for high speed ...

Traditional Gori propellers fold automatically when the engine is off to reduce drag, but they were not optimized to spin freely and generate electricity. The Hybrid Propeller solves this problem ...

Once safely above stall speed, two big wingtip propellers take over and the smaller ones fold ... powered by two turbine engines driving a pair of super-efficient generators.

The fin-powered drone could revolutionize deep-sea exploration, offering improved efficiency over current ... propellers. However, thunniform swimmers struggle with slow-speed maneuvering and ...