What does rotor head mean?
1. rotor head – the axis around which the major rotor of a helicopter turns. rotor shaft. axis of rotation, axis – the center around which something rotates. main rotor – rotor consisting of large rotating airfoils on a single-rotor helicopter that produce the lift to support the helicopter in the air.
What does Main Rotor do?
A helicopter main rotor or rotor system is the combination of several rotary wings (rotor blades) and a control system that generates the aerodynamic lift force that supports the weight of the helicopter, and the thrust that counteracts aerodynamic drag in forward flight.
How does a helicopter rotor head work?
Fully articulated rotor systems are found on helicopters with more than two main rotor blades. As the rotor spins, each blade responds to inputs from the control system to enable aircraft control. The center of lift on the whole rotor system moves in response to these inputs to effect pitch, roll, and upward motion.
What is a rigid rotor head?
Rigid rotor is a type of rotor system used on helicopters. The blades of rigid rotor systems are able to flex, which allows the blades freedom to feather but not to flap or lead. With a rigid rotor, the rotor head must absorb the forces generated during flight maneuvers.
What is the difference between a semirigid rotor system and rigid rotor system?
A semi-rigid rotor system is usually composed of two blades which are rigidly mounted to the main rotor hub. The main rotor hub is free to tilt with respect to the main rotor shaft on what is known as a teetering hinge. In a rigid rotor system, the blades, hub, and mast are rigid with respect to each other.
What is the RPM of helicopter rotor?
Helicopters also make air move over airfoils to generate lift, but instead of having their airfoils in a single fixed wing, they have them built into their rotor blades, which spin around at high speed (typically about 400–500 RPM on a small helicopter or about 225 RPM on a huge Chinook, with the speed depending on the …
Can helicopters go backwards?
Unlike an airplane, a helicopter can fly backwards or sideways. It also can hover in one spot in the air without moving.