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Those are the helicopters designed by Aerospatiale (which was later merged into Eurocopter). IIRC, the first model to use it was the Dauphin.
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Why do some helicopters have enclosed tail rotors?
An enclosed tail rotor is safer and resistant to fouling.
Why do some helicopters have a small tail rotor?
Tail rotors are to correct the effect of engine torque and help steer the helicopter
What happens when a fenestron tail rotor looses a blade?
Solamente tendra una vibracion
How do modern helicopters counteract the rotation of the overhead propeller?
Their tail-rotors counter-act the torque (or spinning) effect of the overhead propellors
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 type of engine used in helicopter?
Early helicopters all used piston engines up to the 1960's . Now most helicopters use jets, except for a few small civilian helicopters. The jets are connected to a very strong and complex transmission which turns the main and tail rotors.
What is the name of the helicopter with two propellers used to carry supplies?
Undetermined. All helicopters have 2 rotors; usually a Main Rotor and a Tail Rotor. So, I assume you meant 2 Main Rotors of same diameter.Boeing Ch-47 Chinook - One rotor mounted in the front over the cockpit and one rotor in the rear.V-22 Osprey - Both rotors are mounted on engine pods mounted at the tips of the wings. The engines rotate from helicopter mode to airplane mode. This helicopter just went into operational service after years of development.There are helicopters with no tail rotor. It has two rotors on top. One going clockwise the other going counter clockwise. Called Coaxial rotors or co-rotors are a pair of helicopter rotors mounted one above the other on concentric shafts. The military ones look like jets so even with jet engines. Very nasty looking helicopters.They are much faster and can turn and maneuver much faster. You can look it up. Helicopters with Coaxial rotors. I do not mean the ones with the fan in the tail. These just have wings on the tail.The other one is the NOTAR is the name of a helicopter anti-torque system which replaces the use of a tail rotor. Developed by McDonnell Douglas Helicopter Systems (through their acquisition of Hughes Helicopters), the name is an acronym derived from the phrase no tail rotor but uses air to keep the copter from spinning.
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).
Why don't helicopters have two rotors?
Some do. The CH-47 has two.
Why does helicopter does not rotary about it axis?
Virtually all modern helicopters have a tail rotor which pulls against the torque that comes from the main rotor. This tail rotor also provides additional directional control assistance to the rudder. Most tail rotors turn at a 3:1 or 6:1 ratio to the main rotor. Meaning, for every revolution of the main rotor, the tail rotor makes 3 revolutions. You can read more about tail rotors here: http://en.wikipedia.org/wiki/Tail_rotor http://www.cybercom.net/~copters/mech/tail_rotors.html
