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Why do the CH-47 Chinook helicopters have counter rotating rotor blades?
Wiki User
∙ 12y ago
Most helicopters have a tail boom and tail rotor. This tail rotor is present to counteract the torque produced by a helicopters main rotor. If there was no tail rotor, the helicopter would tend to rotate in a direction opposite to that which the main rotor blade spins which would make flying difficult or even impossible.
The Chinook doesn't have a tail rotor, instead it has twin main rotors. If they both span in the same direction then this would act to cause the helicopter to twist. However as they rotate in opposite directions the two twisting forces cancel each other out. This has other advantages as it means that the full power of the engines goes towards generating lift and thrust as opposed to driving the vertical stabilising rotor on other helicopters.
Wiki User
∙ 12y ago
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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.
Do helicopters defy gravity?
The rotor blades are designed so that as they spin they push down on the air, which in turn pushes up on the blades, creating lift that acts counter to gravity.
What lifts helicopters?
The rotor blades lift helicopters
What holds a helicopters blades on?
The rotor hub holds blades on
Why do helicopters always have a set of two blades?
Helicopters have 2 sets of blades to keep the helicopter balanced. This is due to the unique shape of the helicopter.
What is the palindrome for system of horizontal blades that allow helicopters to fly?
Rotor blades
Can a Chinook airlift an other Chinook?
Chinook can hold about 19,500 lbs,otherwise the hooks could cut off by the rot er blades.
Why do army helicopters have two blades?
the helicopters are bigger so there needs to be a greater weight distribution
Why are helicopters noisy?
Older helicopters had noisy rotor blades, modern ones are very quiet.
Are helicopters rotor blades on the top called propellers?
No!
How do counter rotating propellers on a helicopter increase the lift?
Counter rotating blades on a helicopter are used to replace the traditional tail rotor found on most aircraft. Because the blades oppose each other (and therefore cancel out the torque created by the other blade) a tail rotor is not necessary. This allows all of the engine's power to be used for lift rather than powering the additional rotor.
Are there any 3 blade rotor helicopters in use?
Yes, many small helicopters have 3 blades
