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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Describe the technique for carrying out a cushion take-off, as follows:
Carry out a hover check at a low hover in
maximum ground effect facing into wind.
Lookout
Initiate slow forward movement with cyclic. Apply sufficient power to prevent sink.
Maintain gentle acceleration, staying in maximum ground effect.
As the ground effect is lost and translational lift is acquired, select climb power and airspeed.
Stress that in order for this type of take-off to be
effective all control movements must be gentle and progressive.
Vertical or towering take-off
Explain that this type of departure is ideal for circumstances where there are obstacles in the departure path, depending on the height of the obstacles, as this method involves the use of high power settings.
Describe the technique for carrying out a vertical or towering take-off, as follows:
Establish a low hover into wind and complete a power check and take-off checks.
Apply sufficient power to initiate and maintain a gentle vertical climb.
Ensure that the climb is vertical by reference to obstacles ahead and to the side of the helicopter. As the approach point is reached, check for a positive rate of climb, then ease the cyclic forward so that the helicopter moves forward and continues to climb.
As translational lift is attained, select a climb attitude and apply climb power.
No-hover landing
Explain that this type of landing is useful in
conditions where it is not desirable to approach to or hover, such as in dust, powdery snow or turbulence. It requires less power than a normal approach to a hover.
Describe the technique for carrying out a no-hover landing, as follows:
Approach the selected landing spot as required.
When the approach is almost completed, and groundspeed is close to zero, anticipate loss of translational lift by applying sufficient power to minimise the rate of descent.
Let the helicopter sink gently through the cushion onto the ground.

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