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The main rotor produces lift by re-directing the flow of air downward. Due to the torque created from spinning the main rotor, with just the main rotor the helicopter's fuselage (body) would rotate the opposite way until it reached a speed which was equal and opposite the torque/resistance.
The tail rotor counteracts the torque on the main rotor by creating a similar re-direction of air. Therefore torque turns the aircraft one way and the tail rotors thrust turns it the other. To turn the opposite way as the blades rotate you simpily remove the tail rotor thrust.
All helicopters need some means of generating this counter-force. There is a "Notar" (No Tail Rotor) which uses the Coanda effect to produce the counter-force.
What else can I help you with?
How did the Titanic move?
It moved on LARGE PROPELLERS.
What were biplane propellers made of?
In those days propellers were made of layers of wood, often 6-8 layers of hardwood, hand carved to perfection.
Three of these moved the ship through the water?
propellers
How many engines does a helicopter have?
Depends on the class of helicopter and its function. Your smallest helicopters will only have one, whereas your medium helicopters may have either one or two. For example, single and twin engine variants of the UH-1 helicopter were manufactured. Two really tends to be a bit more common in this size range. Some even have three, such as the CH-53.
How can I effectively transport two boats and a helicopter to their destination?
To effectively transport two boats and a helicopter to their destination, you can use a specialized transport company that has the necessary equipment and expertise. They can arrange for the boats to be loaded onto a flatbed trailer or a cargo ship, while the helicopter can be disassembled and transported in a specialized container. Make sure to secure all items properly to prevent damage during transit.
How many propellers are there on a helicopter?
Generally speaking there are 4 propellers. Two of them are crossed over each other that form the main propellers, and the other two are at the rear.
How heavy is a military helicopter with two propellers?
300 Pounds
What are the propellers for on a helicopter?
to move the helicopter left and right
What is the name of the helicopter with two propellers used to carry suppies?
black hawk
Which helicopter hovers the longest the one with the long propellers or the short propellers?
The Helicopter with the long propellers creates more list and has to do less rotations, and use less power than the one with short proplellers. Therefore Helicopter with the long propellers will hover and stay in air longer than the one with short propellers.
Does short propellers fly longer or long propellers on a helicopter?
it depends on the engine and the shape of the blade.
Why does helicopter have propeller and aeroplane not?
Aircraft do have propellers , unless they are jets.
What are the two small propellers on a helicopter?
Oh, dude, those little spinny things on a helicopter are called the tail rotor and the main rotor. The tail rotor helps the helicopter not spin out of control, and the main rotor is like the big boss that actually lifts the whole thing up. So yeah, those propellers are pretty important for not crashing and stuff.
How many Decibels does a helicopter make?
Standing next to a helicopter while the propellers are spinning is 110-115dB.
What is the length size of the propellers of a helicopter?
12.5 ft. to 19 ft. :-)
For a helicopter to be stable as it flies it must have at least two propellers. why?
Helicopters require at least two propellers to achieve stability through a concept known as "counter-torque". The main rotor produces torque that would rotate the body of the helicopter in the opposite direction. The tail rotor or fenestron is used to counteract this torque, providing stability by keeping the helicopter from spinning uncontrollably.
Why do helicopters have propellers for kids?
They do not have propellors for kids. The propellors make the helicopter fly straight
