Leaf tracking
The term blade tracking describes the horizontal plane of a rotor blade of a helicopter .
definition
The term is mainly used in model helicopter construction . If the blade tracking is precisely set, the rotor blades move in one plane. Deviations in the running height of a blade (thus a deviation from the normal running plane) lead to dynamic imbalance , adjacent to the (main) rotor shaft.
Causes of deviations
The cause of a deviation in the running planes is either an incorrect blade pitch angle relative to the other rotor blades / rotor blades or a defect in the quality of the rotor blades.
Setting of the sheet tracking
A perfect rotor blade in combination with a perfect rotor head should not show any deviation. Nevertheless, this can hardly be achieved in reality because even minimal inaccuracies in the extreme speeds applied to a rotor blade relative to the air can cause a change in the blade track. With high-quality model helicopters , the blade tracking can be set individually for each blade using a threaded rod (either starting from the swash plate or directly on the blade holder). Either a pitch gauge is used for this or the tracking is visually tested during the flight. Color markings on the rotor blades are helpful for the latter option. In the field of man-carrying flying, the blade tracking is optimally set directly at the factory.
Web links
Individual evidence
- ↑ Setting using the example of a model (PDF; 7.1 MB).