Answer:Depending on the model and size of the helicopter, a helicopter’s blades, which are between 40-60ft long, spin from about 225 RPM to 500 RPM.
Speed is determined by the power of the rotor and the length of the blade.
The huge American twin-engined, tandem-rotor, heavy-lift Boeing CH-47 Chinook helicopter blades spin at approximately 225 RPM. A smaller helicopter might have blades that rotate at around 400 RPM.
Step-by-step explanation:
