Home made Helicopter!!?

Question

i made a helicopter using popcicle sticks.. but now the problem is that when i turn on the main motor (that rotates on the top.) the hole helicopter starts to spin in left. so i just want to know how to stop the rotations and the helicopter is hand held helicopter..... i didn't add the back rotor which is attached to the tail of the helicopter.. and please tell me what does the rotor in the tail of the helicopter does??. (sorry for the bad grammar.)

Answer 1

Easier than adding a tail-rotor:
Simply add another main rotor that spins the apostate direction. It is called coaxial and the two torque moments cancel each other out. This is used on a ton of hand-held helicopters as tail-rotor configurations are not easy to setup.

http://www.target.com/gp/detail.html/sr=1-1/qid=1183139073/ref=sr_1_1/601-5008577-5310548?ie=UTF8&asin=B000NSFO3W

Answer 2

Torque of the motor causes the helicopter to rotate counter to or against the torque---that is why helicopters have tail rotors....to push the body of the helicopter against this torque rotation and also why it's hard to learn how to manuever them as you have to increase tail rotor power or pitch to match with main rotor power to offset the increase in torque depending on if you want to fly straight or turn. Some helicopters especially model ones have two counter-rotating main rotors to offset and negate the engine torque so there's no need for a tail rotor..and some designs like the NOTAR system use exhaust air pressure from a turbine engine to generate side thrust without using a tail rotor---less complicated system than a tail rotor setup. There's also twin main rotor helicopters like the Piasecki "flying banana" that have one rotor in the front on top and one on the back on top that are linked together but counter-rotate to each other.
http://www.fiddlersgreen.net/AC/aircraft/Piasecki-H21/H-21.php
http://en.wikipedia.org/wiki/NOTAR
http://www.rchobby.co.uk/how_does_the_helicopter_fly_.html

Answer 3

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Answer 4

The tail rotor controls the Yaw or rotational pitch, so the main body stays in one direction.
This is also what controls the left and right turns.by either speeding up or down the rotor or by changing the rotor pitch.

Answer 5

As a former Vietnam helicopter pilot I can find nothing wrong with the above answers. I do have one observation though. Helicopters don't actually fly; they beat the air into submission. HAHAHAHAHA