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Some do. The CH-47 has two.
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∙ 9y ago
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Which way do the propeller spin on coaxial helicopters?
The two rotors spin in opposite directions.
How are planes different from helicopters?
Planes have large wings, Helicopters have rotors
Why doesnt a helicopter Spin out of control?
Most helicopters have a tail rotor for stability while others (often Russian military helicopters) have two main rotors. In both cases the two rotors spin in opposite directions, in order to cancel out any torque effect of a single rotor.
Where is the rotor on an airplane?
Helicopters have rotors airplanes have propellers
What are the two small propellers on a helicopter?
Propellors are on airplanes. Helicopters call them rotors. The small rotor on the back of the helicopter is used to counteract the torque created from the engine driving the main rotors.
Which Helicopters have Fenestron tail rotors?
Those are the helicopters designed by Aerospatiale (which was later merged into Eurocopter). IIRC, the first model to use it was the Dauphin.
What has the author James B Rorke written?
James B. Rorke has written: 'Hover performance tests of full scale variable geometry rotors' -- subject(s): Rotors, Testing, Rotors (Helicopters)
Why do some helicopters have enclosed tail rotors?
An enclosed tail rotor is safer and resistant to fouling.
Why helicaptor have three blades?
Helicopters don't just have 3 blades. It depends on the size and weightlifting capability. Small helicopters such as a Robinson R22 have only 2 blades, the military Merlin has 5 and the Chinook has two rotors with usually 3 blades each.
Why cant you see a helicopter but can hear it?
Because rotors are noisy and helicopters isually fly close to ground
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 has the author R E McFarland written?
R. E McFarland has written: 'Establishment of a rotor model basis' -- subject(s): Models, Aerodynamics, Rotors (Helicopters), Rotors
