直升機(jī)飛行教員手冊(cè) Helicopter Flight Instructor Manual

時(shí)間：2012-06-08 09:45來(lái)源：藍(lán)天飛行翻譯 作者：航空 點(diǎn)擊：次

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References on the ground are a good aid to accuracy during this exercise. Where possible, use a line feature such as a fence or runway edge to help the student. If none exists, give thought to marking the ground with large squares or circles (hover squares).
Most students find this to be a tiring exercise the first time around. Keep a close eye on your student for signs of fatigue, and break up the lesson with a circuit. This has the additional benefit of giving the helicopter time to cool down from the high temperatures and power settings in the hover.
Show the students some hovering patterns, incorporating all the hovering exercises taught thus far in the course. Before sending the student to practise this exercise solo, check that the wind is suitable. It is also wise to brief that hover patterns be practised in conjunction with other exercises.
10
ENGINE FAILURE IN HOVER OR
HOVER-TAXI
GROUND SCHOOL POINTS
Flight manual: Height velocity chart
PREPARATORY INSTRUCTION
Aim
For the student to learn how to land safely following an engine failure at the hover or hover-taxi.
Review
Exercise 7: Hovering
Exercise 8: Take-off and landing to/from Hover Motivation
Engines can fail just as easily at the hover or hover-taxi as in flight. The helicopter will land very quickly should this happen, and it is vital that the pilot be able to react quickly and prevent an incident from becoming an expensive accident.
Airmanship
Selection of a suitable area for practice Teaching Points
Point out that at normal hover or hover-taxi heights, it will not be possible for the pilot to enter autorotation. In fact, lowering the collective following an engine failure will result in a heavy landing. This manoeuvre should not be considered an autorotation; the pilot relies on the inertia in the rotor system to land safely.
Describe the reaction of the helicopter when the engine fails:
yaw drift sink.
Explain that the yaw and drift must be corrected before touchdown. Sink should be controlled by use of the collective, as appropriate to the type of helicopter and the height above ground, to cushion the landing.

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