The diameters of the main rotor and tail rotor of a single-engine helicopter are

Question

The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.59 m and 1.01 m, respectively. The respective rotational speeds are 449 rev/min and 4,144rev/min. Calculate the speeds of the tips of both rotors.

main rotor     . m/s tail rotor     m/s The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.59 m and 1.01 m, respectively. The respective rotational speeds are 449 rev/min and 4,144rev/min. Calculate the speeds of the tips of both rotors. Compare these speeds with the speed of sound, 343 m/s.

Explanation / Answer

449 rev/min = 47 rad/s

4144 rev/min = 433.95 rad/s

So, speed of tips = main - 356.87,

tail - 434.3 m/s

comparision , main: 1.04,

tail: 1.266

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