What are the main restrictions on the maneuverability of the direct drive propulsion system when it is moving at a low speed?_____
A: Minimum stable speed of main engine
B: Reduction gearbox speed
C: Clutch performance
D: Propeller size
A: Minimum stable speed of main engine
B: Reduction gearbox speed
C: Clutch performance
D: Propeller size
举一反三
- The four-stroke engine is used for （） and sometimes for main propulsion with a gearbox to provide a propeller speed of between 90 to 120 rev/min.
- The PMC ( ). A: Has no effect at low idle speed B: Is powered by the aircraft C: Can cause a reduction in engine speed only D: Is equipped with the power trim adjustment
- The ______ provides a means of varying the relationship between the speed of the engine and the speed of the wheels. A: clutch B: steering shaft C: manual transmission D: differential
- What is the speed of the crankshaft in a four-stroke/cycle engine when the camshaft is turning at 750 rpm?（）
- ________ will also be a very important factor when determining the speed of access of a particular user. A: The speed of the system B: The speed of the internet facility C: The platform dependency D: The demanding quality