Low Rotor RPM Recovery in a Helicopter
Low Rotor RPM Recovery in a Helicopter
Apr 26, 2018
helicopterground.com
I’ve had rotor brake failures during HEMS missions in high winds, and it can really screw with the plan, as it could prohibit a shutdown, depending on the local wind speed 💨 Why? Rotor blade dynamics change a lot during shutdown. When a helicopter rotor system is at operating RPM, the rotor blades are kept “stiff” and stable primarily by centrifugal force: 🔸 The blades are pulled outward 🔸 In-plane stiffness is high 🔸 Aerodynamic disturbances are relatively well damped But during shutdown, r
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