What is the Min Stabilized rotor RPM?

What is the Min Stabilized rotor RPM?

• A. 320
• B. 300
• C. 340
• D. 330

Answer: (A)

Rotor speed must stay within a stable operating band, and there is a lower limit where the rotor system can maintain control and lift in hover and low-speed flight. For the MH-65E, the minimum stabilized rotor RPM is 320, because at or above this speed the rotor system has enough lift and control authority to remain stable with the governor regulating RPM. A value of 300 would be too low to sustain stable lift, while 330 or 340 are simply higher points in the operating range and do not define the minimum.

Rotor speed must stay within a stable operating band, and there is a lower limit where the rotor system can maintain control and lift in hover and low-speed flight. For the MH-65E, the minimum stabilized rotor RPM is 320, because at or above this speed the rotor system has enough lift and control authority to remain stable with the governor regulating RPM. A value of 300 would be too low to sustain stable lift, while 330 or 340 are simply higher points in the operating range and do not define the minimum.