Sport Pilot for Helicopter - Simplified Flight Controls › VIII. Emergency Operations › Task F. Low Rotor Revolutions Per Minute (RPM) Recognition and Recovery

SH.VIII.F.R5

Risk management

Low inertia rotor systems, as applicable.

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Helicopter Flying Handbook p. 11-3
Chapter 11: Helicopter Emergencies and Hazards › Autorotation › RPM Control
Control Rotor rpm in low inertia rotor systems has been studied in simulator flight evaluations which indicate that the simultaneous application of aft cyclic, down collective, and alignment with the relative wind (trim) at a wide range of airspeeds, including…
Helicopter Flying Handbook p. 4-4
Chapter 4: Helicopter Components, Sections, and Systems › Main Rotor System › Rigid Rotor System
Figure 4-4. Four-blade hingeless (rigid) main rotor. Rotor blades are comprised of glass fiber reinforced material. The hub is a single piece of forged rigid titanium. The rigid rotor system is very responsive and is usually not susceptible ... mast bumping like the semirigid systems because the rotor hubs are mounted solid to the main rotor mast. This allows the rotor and fuselage to move together as one entity and eliminates much of the oscillation usually present…
Helicopter Flying Handbook p. 4-2
Chapter 4: Helicopter Components, Sections, and Systems › Main Rotor System
Main Rotor System The rotor system is the rotating part of a helicopter which generates lift. The rotor consists of a mast, hub, and rotor blades. The mast is a hollow cylindrical metal shaft which extends upwards from ... driven and sometimes supported by the transmission. At the top of the mast is the attachment point for the rotor blades called the hub. The rotor blades are then attached to the hub by any number of different methods. Main…
Helicopter Flying Handbook p. 1-3
Chapter 1: Introduction to the Helicopter › Rotor System
Rotor System The helicopter rotor system is the rotating part of a helicopter that generates lift. A rotor system may be mounted horizontally, as main rotors are, providing lift vertically; and it may be mounted vertically, such as a tail ... rotor, to provide lift horizontally as thrust to counteract torque effect. In the case of tilt rotors, the rotor is mounted on a nacelle that rotates at the edge of the wing to transition the rotor from a horizontal mounted…
Helicopter Flying Handbook p. 11-16
Chapter 11: Helicopter Emergencies and Hazards › Low Rotor RPM and Rotor Stall
Other causes of a power-on low rotor rpm condition include the pilot rolling the throttle the wrong way in helicopters not equipped with a governor or a governor failure in helicopters so equipped. As the rpm decreases, the amount ... more difficult than it would otherwise be. With less power from the engine and less lift from the decaying rotor rpm, the helicopter will start to settle. If the pilot raises the collective to stop the settling, the situation will…