47. Helicopter mass m = 3 tons hangs in the air. Determ

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47. Helicopter mass m = 3 tons hangs in the air. Determine the power N, the motor developing a helicopter in this position, the two values of the diameter d of the rotor 1) of 18 m; 2) 8 m. The calculation assumed that rotor ejects air downward cylindrical jet diameter equal to the diameter of the rotor.

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Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)


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