The engine may lose power or slow down during running， when this occurs， the first cause possible may be hot bearings and （） of the pistons in the cylinders.
举一反三
- Wind shear is dangerous to flight safety. First, it may cause the airspeed increased and decreased. When we fly from tailwind into headwind, the airspeed will be increased and when we fly headwind into tailwind, the airspeed will be decreased. Second, it may cause the aircraft to lose altitude, so the aircraft is difficult to control.
- Pistons may be made in （） in order to keep the weight down for balancing purposes at high speed.
- Which of the following may cause that an engine doesnt run on starting air?（）
- If the engine does start on air， but combustion does not immediately begin， the cause may not be （）.
- When you want to express your dislike for running, you may say________