2012年12月5日星期三

Something about rc helicopter tail rotor blades


Translating trends
If you've seen a helicopter close, you can see that most of the time, drivers are not at ground level. In other words, one of the skids of the helicopter is smaller than the other. Even if the wind load and can cause it defines the thrust of the tail rc helicopter rotor blades for two Skid Row in right to left or bottom. Impulse tail rotor helicopter tends to vary in the same direction, and means for translating trends.

Tail rotor is designed to provide torque to the rc helicopter tail rotor blades in the opposite direction of the main helicopter war. Some of these causes traction headset helicopter derived from the front in the impulse the same rotor is against the tail rotor to counteract the low side bypass. Tilt angle can be obtained by adjusting the gearbox with a slight angle or flight control design to tilt the disc rotor cyclic control may perform the alignment.

Direction of rotation, which makes the difference. A system that rotates clockwise when viewed from above, the pressure causes the tail rotor of a helicopter to move to the left. The angle of the main balance
rc helicopter blades disc to the right to counteract the effects of a broker to hang right. System on trends left and makes the helicopter glide left float left margin below.

Retreating blade stall
Map rail system driving the air creates a problem because the asymmetry art installations. One side plate of the state of the wind (head), while the other is removed (ie wind). At a fixed angle of attack, lift the forward side elevation of a larger imbalance increases with increasing speed. The system is similar to pulse the rotor.
As the flicker is to change the angle of attack in response to the different speeds of the output sheet, since it moves around the rotor disc. If the sheet feeder experiment with a higher speed, subject to the elevator rises causing it to move. This motion is the cutting angle ranges to reduce wind. Retired opposite happened. This reduces the rate of reduction of pressure causes the blade moves downward, which increases the angle of attack. You can get the wing a long wheelbase death. When the helicopter flies faster output side must continue to increase the angle of attack to compensate. Sometimes it starts to accelerate, remove the leaves have fallen.

From the point of view of the driver, if there is an abnormal vibration direction, the nose of the rc helicopter Carbon Fiber Blades and may tend to roll the paralyzed side. The number and severity of roll and pitch, depending on the design of the rotor.
The tendency of the nose to the ground, the system behaves like a gyro rotor, and therefore subject to gyroscopic precession (physical properties when external forces can occur in a rotating body, the effect of over 90 degrees toward rotation has been applied). Thus, when the sheet is stopped by removing and for generating lift, the effect of which is to the rear of the rotor disc. This leads to the disk tilt back, nose, and vomiting. The driver should calm down, and then take the speed of the front.

Conditions such as density altitude, bends or sharp blade of high loading (due to high gross weight), turbulence and low rotor speed, the probability of loss is removed during use in proximity of the wholesale RC Helicopter Blades increased VNE (speeding ).

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