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. Point out that this type of landing requires careful prior confirmation that the selected spot is suitable for landing. Run-on landing Explain that this type of landing can be used in similar conditions as the no-hover landing. Although it requires less power to perform, a large, flat, smooth surface such as a runway is essential. Describe the technique for carrying out a run-on landing, as follows: Approach the selected landing area as required. As the approach is completed, run on at slow walking pace. Apply sufficient power to cushion the landing. After landing, maintain the cyclic and collective positions until forward movement stops. Approaches Explain that in operational conditions it is sometimes necessary to approach to land at an angle other than standard, as follows: Steep approach This approach is for avoiding obstacles on the final approach path. Point out that airspeed will be lower than normal and that more power will be required. Always prepare for a no-hover landing. Stress the need to maintain reasonable airspeed for as long as possible owing to the danger of a vortex ring state occurring or of insufficient power to prevent a hard landing. Shallow approach Explain to the student that a shallow approach requires less power than a standard or steep approach. It should be employed when the approach path is free from obstacles and where conditions limit the power available, or where maximum power is available but inadequate for the use of standard techniques. Stress that care should be taken to avoid making the approach angle too shallow, i.e. flat. This requires more power and can lead to problems in decelerating to a hover because of the possibility of the tail striking the ground. AIR EXERCISE Review the standard take-off and departure. Note and compare the power required, after demonstrating with the following techniques: no-hover take-off and standard departure cushion creep take-off |
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