0
Helicopters fly by means of an angle of attack increase in the main - rotor disc. However - when this angle of attack increases, the drag experienced on the blades also increases which tends to want to slow the blades down. To avoid that, a gas turbine helicopter engine will have what is called a Power Turbine Governor or PTG. This control unit senses increases in torque values when the pilot pulls up on collective and distributes more fuel into the engine in order to get more output to counter the increase in drag on the rotor blades, thus maintaining a constant rotor RPM in all operating conditions. Rotor 'droop' is when the rotor RPM drops below a minimum given parameter and can be caused by a variety of problems.
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
When was the double rotor helicopter invented?
1944
How does a helicopters rotor blades make the helicopter turn left and right?
By adjusting the speed of tail rotor, which points to the side, the pilot can turn the helicopter in flight. The main upper rotor actually plays only a minor part in making helicopter turn. The part supplying most of the control is the tail rotor. Because the main rotor is spinning in one direction, without a tail rotor, the body of the helicopter would spin around in circles in the opposite direction. The reason for this is explained in the first part of Newton's third law of motion: for every action there is an equal and opposite action. The torque generated to make the rotor turn also exerts torque on the body of the helicopter "willing" it to spin the opposite direction. However, the tail rotor spins, pushing air to the side. This creates force in the opposite direction, keeping the helicopter stable. By simply adjusting the speed of the tail rotor, the helicopter can be turned in flight.
How does the twin engine on the helicopter work?
Both engines feed into one transmission and that mounts the main rotor.
Is there any mirror on the top of helicopter main rotor blade?
Helicopters do not have any mirror on top of the rotor. Periscope mirror is equipped on some aircraft to have clear vision of runway to pilot.
Is there any helicopter without tail?
No, that is impossible. You see, helicopters must have that tail rotor in order to keep steady. Without one, it would spin out of control in the opposite direction that the main rotor is going. The tail rotor provides a counter form of propulsion that keeps the fuselage (body) of the copter from spinning out of control. The pilot also controls the speed and angle of the tail rotor, so as to turn the helicopter by speeding up or slowing it down. As for Chinooks, those big military helicopters with two main rotors, each rotor spins in the opposite direction to stop from entering a tailspin.
What is a helicopter with 2 propelers?
That is a twin rotor helicopter
What is on top of a helicopter?
Rotor blades are on top of a helicopter.
What does the tail rotor of a helicopter do?
it stabilises and steers the helicopter.
Where was the helicopter rotor made?
The helicopter was made in China.
Another name for helicopter propelers?
Main rotor and tail rotor. The main rotor is on top of the helicopter consisting of two or more blades, and the tail rotor is at the back of the helicopter, which also consists of two or more blades.
What are the major parts of a helicopter?
It's main rotor, tail rotor makes the helicopter to move which is powered by it's engine. These are the major parts of a helicopter
What is a blade from a helicopter in words?
The main blade on a helicopter is the 'rotor'
How is a helicopter different from an airplane?
A helicopter has rotor blades and an airplane does not.
What is the second rotor on a helicopter for?
The small rotor on the tail is to counter-act the torque of the big rotor on top. So it is used for steering and to keep the helicopter stable.
How many wings does a helicopter have?
Helicopters do not have any wings. Airplanes have wings Helicopter has rotors. A helicopter has at least two sets of rotors. One rotor creates lift ( Main Rotor on the top ) & the other prevents the helicopter from spinning in circles( Tail Rotor).
What should be the maximum RPM of helicopter rotor?
That depends on type of helicopter
The main rotor on a helicopter creates what?
the main rotor creates lift.
