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Back to: "T"translating tendency
- Sinônimos
- tail rotor drift
- Definição1
- The tendency of the single-rotor helicopter to move laterally during hovering flight.
- Fonte1
- FEDERAL AVIATION ADMINISTRATION. Rotorcraft flying handbook (FAA-H-8083-21). Washington, DC: FAA, 2000. Disponível em: http://www.faa.gov/library/manuals/aircraft/media/faa-h-8083 -21.pdf. Acesso em: 10 fev. 2012.
- Fonte2
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. Manual of aircraft accident and incident investigation. Montreal, 2014. (Doc. 9756)
- Nota adicional1
- Counteracting translating tendency, in a helicopter with a counterclockwise main rotor system, causes the left skid to hang lower while hovering. The opposite is true for rotor systems turning clockwise when viewed from above.
- Contexto
- TRANSLATING TENDENCY OR DRIFT: During hovering flight, a single main rotor helicopter tends to drift in the same direction as antitorque rotor thrust. This drifting tendency is called translating tendency.
- You should be aware of any abnormal vibration or mast bumping that signals maximum cyclic deflection. If this occurs, abandon the landing because the slope is too steep. In most helicopters with a counterclockwise rotor system, landings can be made on steeper slopes when you are holding the cyclic to the right. When landing on slopes using left cyclic, some cyclic input must be used to overcome the translating tendency. If wind is not a factor, you should consider the drifting tendency when determining landing direction.
- a) The factors contributing to a dynamic rollover of a CCW rotating main rotor are (1) right side skid/wheel lower than the left with translating tendency from tail rotor thrust adding to the rollover force; (2) right lateral center of gravity encourages the right skid to remain in touch with the ground; (3) crosswinds from the left which cause disc blowback to the right; (4) left yaw inputs cause the helicopter to present its right skid forward. b) When left skid/wheel is upslope, less lateral cyclic control is available due to the translating tendency of the tail rotor.
- Subárea1
- Rotorcraft
- Português
- tendência translacional