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What is the value that maintains minimum power speed of the aircraft?(a) u/\(\sqrt[4]{3}\)(b) u/\(\sqrt[3]{3}\)(c) u^2/\(\sqrt[4]{3}\)(d) u^2/\(\sqrt[3]{3}\)The question was asked in unit test.My question is based upon Climb and Descent Performance with Thrust-Producing Engines topic in chapter Climb and Descent Performance of Aircraft Performance

Answer»

The CORRECT option is (a) u/\(\sqrt[4]{3}\)

Explanation: The MINIMUM SINK rate is attained by flying at a relative airspeed of u/\(\sqrt[4]{3}\). At this airspeed the minimum power speed of aircraft is attained. Flying at this speed will MAXIMIZE the time of gliding flight.



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