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 7.69 m and 1.05 m, respectively. The respective rotational speeds are 457 rev/min and 4.126 rev/min. Calculate the speeds of the tips of both rotors. main rotor tail rotor Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully, m/s Compare these speeds with the speed of sound, 343 m/s. v main rotor / v sound differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. V tail rotor /v sound

Explanation / Answer

Let d be diameter then conversion is :
[(3.141 * d)/60]*(R/M) = m/s
=> 3.141*1.05*4126/60=226.83 m/s

Comaparision:
1) 181.9/343=0.53
2) 226.83/343=0.661

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