What makes a helicopter fly forward and what controls a rocket's flight?

A helicopters main rotor consists of a number of blades. Each blade is an airfoil (a wing) and generates lift. The rotor is driven by a motor. The pitch of the blades can be changed, either collectively or independently or a combination of both.





Changing the pitch collectively will cause an increase or decrease in lift making the helicopter go up or down.





When the pitch of the blades is controlled independently, it is done in such a way that the pitch depends upon the blades instantaneous position. If the pitch is changed so that the blade towards the rear has increase pitch and the blade towards the front has decreased pitch, this will tilt the whole rotor forward. This will result in the lift producing a force both upward and forward. Obviously, by changing relative pitches around the rotor in this manner, it is possible to move forwards, backwards and sideways.





A tail rotor is used to counteract the tendency of the helicopter to rotate in the opposite direction to the main rotor. By changing the pitch of the tail rotor the helicopter can be turned left or right.





Rocket motors on a rocket are mounted on gimbals. The motor thrust can therefore be steered. This allows control over the direction of the rocket.What makes a helicopter fly forward and what controls a rocket's flight?
If the blades of a hielcopter lift straight up the craft will rise straight up. If the blades are lifting up but forward too the craft will rise and move forward. Rockets work like releasing an inflated balloon. As the air is free to leave the balloon there is less pressure on the balloon where air is escaping than on the forward side where air is contained. Rockets create a gaseous pressure driving the rocket forward because the is less pressure on the rocket where the hot gases are escaping. Consider a cylinder closed at one end only. Any pressure inside the cylinder can act only on the closed end, right?What makes a helicopter fly forward and what controls a rocket's flight?
The pitch angle of the blades can be controlled by the pilot in 2 ways - cyclic control and collective.


The cyclic control is made by moving a control stick that rises up from the cockpit floor between the pilot's knees, and can be moved forwards/backwards and left/right. These stick movements correspond directly to the directional movement of the helicopter; moving the cyclic stick forward makes the helicopter fly forwards while bringing the stick back slows the helicopter and even makes it fly backwards. Moving the stick to the left or right makes the helicopter turn in these directions.
the blades of a helicopter are joins together to whats known as a rotor head which is joined to a swash plate ,this swash plate is linked to the ';joy stick'; between the pilots knees when the ';joystick is pushed forward the swash plate is tilted forward thus tilting the rotorhead and blades causing the helicopter to fly forward ,the same can be said for ';reverseor sideways ,the collective is in the same position as the handbrake on a car,pull up on the collective the angle of the blade increases causing greater downforce causing the chopper to rise, the same as if you push it down the blade angle decreases giving less downdraught and the chopper to decend
Thrust, up collective and blade angle





Gyros and engineers.
A helicopter's rotor has four fixed long blades which rotate at a high rpm.In order to go forward the pilot moves the control stick forward. When that action takes place,a specific motor shaft combination placed on the base of the blade which is attached to the main rotor raises the blades to a specific angle(+ve X-axis) the lift created thus proppels the helicopter forward.To counter this torque,a tail rotor is used.


A rocket's flight is internally controlled by on board computers that help it to stay on the pre defined trajectory.Externally it is controlled by fins that are wired to the navigation systemThe movement of fins help the rocket navigate.