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塞斯纳172飞行员操作手册 Cessna 172 PILOT'S OPERATING HANDBOOK(33)

时间:2011-12-29 11:03来源:蓝天飞行翻译 作者:航空 点击:

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NOTE
Carburetor heat should not be used during takeoff unless it is absolutely necessary for obtaining smooth engine accel¬eration.
Full-throttle runups over loose gravel are especially harmful to propeller tips. When takeoffs must be made over a gravel surface, it is very important that the throttle be advanced slowly. This allows the airplane to start rolling before high RPM is developed, and the gravel will be blown back of the propeller rather than pulled into it. When unavoidable small dents appear in the propeller blades, they should be immediately corrected as described in Section 8 under Propeller Care.
Prior to takeoff from fields above 3000 feet elevation, the mixture should be leaned to give maximum RPM in a full-throttle, static runup.
After full throttle is applied, adjust the throttle friction lock clockwise to prevent the throttle from creeping back from a maximum power position. Similar friction lock adjustments should be made as required in other flight conditions to maintain a fixed throttle setting.
WING FLAP SETTINGS
Normal and short field takeoffs are performed with flaps up. Flap settings greater than 10° are not approved for takeoff.
Use of 10° flaps is reserved for takeoff from soft or rough fields. Use of 10° flaps allows safe use of approximately 5 KIAS lower takeoff speeds than with flaps up. The lower speeds result in shortening takeoff distances up to approximately 10%. However, this advantage is lost if flaps up speeds are used, or in high altitude takeoffs at maximum weight where climb performance would be marginal with 10° flaps. Therefore, use of 10°
flaps is not recommended for takeoff over an obstacle at high altitude in hot weather.
SHORT FIELD TAKEOFF
If an obstruction dictates the use of a steep climb angle, after liftoff accelerate to and climb out at an obstacle clearance speed of 59 KIAS with flaps retracted. This speed provides the best overall climb speed to clear
 
 
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