AERONAUTICS: Helicopters

Sixteen entries have been received by the British Air Ministry for its Helicopter prize of $25,000. Not all the contestants are British. The U.S. is represented by Emil Berliner and his son Henry who have already achieved considerable success with a vertical lift machine in various tests in Washington. Pescara represents France, and there is at least one Spaniard in the running.

The conditions of success are severe. The machine must be able to rise vertically to 2,000 feet, remain at that height for half an hour hovering over a small area, make complete...

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