The remote control helicopter is one of the most versatile transport modes available, which gives the pilot unrestricted access to a completely three-dimensional space. In a traditional full-size helicopter, the pilot directs the cycle with one hand and the collective with the other.
However, in the best RC helicopter, it is not always considered as the helicopter, which makes it very difficult to maintain orientation and maintain control. I have even heard that full-size helicopters say that an RC helicopter is harder to fly, although in reality it is unlikely to be so, but to remain aligned when the helicopter is extremely difficult to master.
How do Remote Control Helicopters fly?
How does a remote-controlled helicopter fly? Someone once said that it overcomes the air in submission, and indeed it does somehow. The flight of the RC helicopter can be divided into 5 basic components and their functions. The main rotor, the tail rotor, the swing plate assembly, the collective control and the cyclic control.
The main rotor:
1. A conventional Remote Control Helicopter has a main rotor in the fuselage consisting of two or more rotor blades extending from the head of the central rotor or the central rotor assembly.
2. The main rotor of an RC helicopter generates the lifting power that makes the RC helicopter fly. The rotors of The best RC helicopter have the shape of an airplane wing, only they are thinner, narrower and both sides are symmetrical.
3. As the blades rotate in the air, they create buoyancy. The height of the generated height is determined by the angle of inclination of each blade of the rotor as it moves through the air. The angle of inclination is called the angle of attack when the rotors are moving.
4. Some of the cheaper RC helicopter models that use fixed pitch rotors generate lift as the motor accelerates or decelerates, and therefore the speed of the main rotors. This results in a much slower response from the helicopter because some engine speed is needed to accelerate or decelerate.
5. The angles of inclination of the blades are controlled by the collective and cyclic controls transmitted from the vibrating plate to the main rotors.
As Newton’s law states that “for every force, an equal and opposite reaction force is present” as soon as the RC helicopter leaves the ground, the helicopter can not turn in the opposite direction to the torsional force that generates the main rotors of the aircraft.
To stop the rotation of the body, a force must be exerted to counteract the force of the main rotors to stop them. In a single-rotor remote-controlled helicopter, this is usually achieved by a smaller set of rotors mounted on a long tail arm, the tail rotor, which is used to control the tilt or rotation of the helicopter.
The set of swash plates:
The place of fall in a remote control helicopter is used to translate the commands of the pilots into the movement of the main rotor blades. The oscillating plate assembly fits into the main rotor shaft below the helicopter head and consists of a rotating disk and a non-rotating disk.
The lower disk, which does not rotate, is directly connected to the cyclic and collective controls, which are controlled by servos, and are controlled by the inputs of the pilot transmitter.
This non-rotating disc is connected by a bearing to the second hub, which rotates with the rotor and is connected to the inclination horns of the main rotor blade.
The vibrating plate can be tilted in any direction according to the cyclic controls, or the inclination of the rotors can be changed up and down under collective control, so that the pilot can control the RC helicopter in a three-dimensional space.
Collective control of helicopter:
The collective control raises the whole set of vibrating plates as a unit. As the cyclic plate rises or falls, at the same time it also alters the pitch of all the rotor blades. This is called collective control.
Therefore, when collective control is increased, the entire oscillating plate assembly rises, which increases the angle of attack. Increasing the angle of attack increases the height of the main rotor, which increases the height of the helicopter while reducing the angle of attack to reduce lift.
Cyclic control of remote control helicopter:
The cyclic remote control helicopter operates by tilting the oscillating plate upwards or downwards and individually increasing the pitch of a rotor blade so that the angle of attack on one side of the helicopter is greater than in the other. Through the cyclic and collective control of the main rotor blades and the control of the inclination attitude, the motor speed and, therefore, the speed of the main rotor blades can be kept constant, which increases the time Reaction of maneuverability.