how is a helicopter able to tilt its propeller to change its travelling direction?

Question

a detailled explanation including gears and pedalls. diagrams are welcome my email adress is [e-mail]

Answer 1

The pilot dips his shoulders like Laverne on Laverne and Shirley at the beginning of the show.

Answer 2

Some reasonable answers above and a few correct facts, but nothing very clear--------

The rotor is tilted in the direction of flight by cyclicly (once per revolution) changing the blade pitch (angle of attck) so it gets more lift when it's at the rear of the aircraft and less at the front. The "swash plate" mentioned above is part of the mechanism that does this. The swash plate is also connected to the collective pitch control which causes all the blades to increase or decrease their pitch together, which raises or lowers the net lift the rotor is producing.

A good primer can be found at
http://en.wikipedia.org/wiki/Helicopter_flight_controls

Answer 3

You change the plane or the rotor by moving the "swash plate". You also have to take into account precession, so, for example, if you want the rotor to tilt forward, you would tilt the swash plate to the side 90 degrees before the front position.
This is taken into account so a forward movement of the cyclic (stick) produces a forward tilt to the rotor disc.
If you need more detail give me a shout and 10 points ;o)

Answer 4

Main rotor pitch can be changed too. Foward tilt is for foward flight rear ward tilt is for backward flight. Tail rotor older machines controls the fusalage's line of travel more tail rotor pitch turn aginst the torque of the main rotor. "left turn" less pitch on the rear rotor "right turn" Helicopter are hard to fly but once mastered they can do imazing things. New helicopter designs have a duct from the turbine engine fan that blows air out of the tail to change direction

Answer 5

In a Helo the rotor (not propeller) doesn't tilt. The pitch changes depending where it is on the disc at the time. Quick example: If you want to tilt the nose down to move forward in a "normal" direction you would apply increased pitch to the right side of the disc. The swash plate enables you to add/remove pitch at any point on the disc. Gyroscopic precision (effecting anything spinning in a disc) is why the reaction to the pitch increase force is realized 90 degrees out of phase.
Good diagrams/videos/etc at:
http://travel.howstuffworks.com/helicopter5.htm

Answer 6

The tilt of a helicopter's main rotor done in one of two ways. First it can be set at tilt by the transmission. This is done during serivicing and cannot be changed during flight. During flight the tilt of the main rotor is control by the stick (not pedals).

Answer 7

The rotors are attached to a pivoting platform. This platform is controlled by the Systolic control. The Systolic controls the pitch(angle) of the pivoted rotors. The second control is the cyclic. It is basically the throttle, it controls the speed at which the rotors turn. Foot pedals control the rear propellar, moving it left and right, therefore moving the body of the helicopter left and right.