直升机飞行教员手册 Helicopter Flight Instructor Manual
时间：2012-06-08 09:45来源：蓝天飞行翻译 作者：航空 点击：次
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To view this page ensure that Adobe Flash Player version 9.0.124 or greater is installed. 21 LIMITED POWER/MAXIMUM PERFORMANCE AND STEEP APPROACHES GROUND SCHOOL POINTS Flight manual: Limitations Load and density altitude performance charts Vortex ring PREPARATORY INSTRUCTION Aim For the student to learn additional take-off and landing techniques for use under operational conditions Review Take-off and Landing – Exercise 7 Transitions – Exercise 11 Motivation Although the techniques learned in Exercises 7 and 11 are those that should continue to be used under optimum conditions, operational situations such as high all-up weight, high density altitude, unfavourable wind conditions or obstacles close to the flight path may dictate the use of advanced techniques. Another practical application is in conditions of restricted visibility, such as snow, dust or sand. Airmanship Lookout: obstacles Helicopter limitations Teaching Points No-hover take-off Explain that this take-off can be usefully employed in conditions of blowing snow or where dust, sand or debris may cause a hazard should a normal take-off and departure be used. Describe the technique for carrying out a no hover take-off, as follows: Complete take-off checks, making sure that the RPM is at the maximum take-off setting. Make a careful all-round lookout. Smoothly apply collective to initiate a vertical climb. After checking skids are clear of all obstructions, use cyclic to set the climb attitude. Adjust helicopter attitude when clear of obscuring phenomena. Point out that since this type of take-off is not preceded by a hover check, it is doubly important to ensure that the helicopter is within weight and C of G limits and that there is sufficient power available for the intended departure. Cushion creep take-off Point out that this type of departure is very economical in power required, since it involves making maximum use of the ground cushion until translational lift has been acquired. It does, however, require a relatively flat departure path that is free of obstacles. This technique is effective in circumstances where it is not possible to take off into wind. |
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