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塞斯纳172飞行员操作手册 Cessna 172 PILOT'S OPERATING HANDBOOK(36)

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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STALLS
The stall characteristics are conventional and aural warning is provided by a stall warning horn which sounds between 5 and 10 knots above the stall in all configurations.
Power-off stall speeds at maximum weight for both forward and aft C.G. positions are presented in Section 5.
SPINS
Intentional spins are approved in this airplane within certain restrict¬ed loadings. Spins with baggage loadings or occupied rear seat(s) are not approved.
However, before attempting to perform spins several items should be carefully considered to assure a safe flight. No spins should be attempted without first having received dual instruction both in spin entries and spin recoveries from a qualified instructor who is familiar with the spin characteristics of the Cessna 172N.
The cabin should be clean and all loose equipment (including the microphone and rear seat belts) should be stowed or secured. For a solo flight in which spins will be conducted, the copilot's seat belt and shoulder harness should also be secured. The seat belts and shoulder harnesses should be adjusted to provide proper restraint during all anticipated flight conditions. However, care should be taken to ensure that the pilot can easily reach the flight controls and produce maximum control travels.
It is recommended that, where feasible, entries be accomplished at high enough altitude that recoveries are completed 4000 feet or more above ground level. At least 1000 feet of altitude loss should be allowed for a 1-turn spin and recovery, while a 6-turn spin and recovery may require somewhat more than twice that amount. For example, the recommended entry altitude for a 6-turn spin would be 6000 feet above ground level. In any case, entries should be planned so that recoveries are completed well above the minimum 1500 feet above ground level required by FAR 91.71.
 
Another reason for using high altitudes for practicing spins is that a, greater field of view is provided which will assist in maintaining pilot orientation.
 
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