Word: airscrews
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Dates: during 1924-1924
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...lift 100 pounds; 35 horsepower will lift a weight for which an airplane like the De Havilland requires a 400 horsepower Liberty. Nor is a high degree of forward speed really hard to achieve. It is in coming down with engines stopped that the main difficulty lies. The airscrew must then act as a giant parachute. When one man sails down gently in a parachute its supporting area must be over 100 square feet. It is enormously difficult to provide a supporting area enough to prevent a 2,000 pound machine from crashing violently to the ground. The airscrew blades...
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