In order to satisfy the operation requirement of the rated thrust of the propeller, the propulsion motor performs only in rated torque on the lowspeed, so the motor power is low.
认为以满足螺旋桨额定推力为目的,推进电动机只需要低速输出额定转矩来实现,即输出功率较低。
2
Only small aircraft, and those needing tough low-speedpropulsion at low altitudes, for agricultural work and fire-fighting, still have piston engines.
只有一些小型的飞机,以及那些用于在低空低速爬升飞行的用于农业以及灭火用途的飞机仍然使用活塞发动机。
3
The vessel is to be single fixed pitch propeller propulsion with one (1) lowspeed diesel engine located aft.