decrease speed of the engine

decrease in medical fitness

Will significantly decrease maximum power when threshold is reached

decrease the value

engine capacity / engine power, engine output

supersonic speed (exceeds speed of sound / Mach 1)

variable-speed with speed control

instantaneous vertical speed indicator / instantaneous vertical-speed indicator (IVSI)

Nr gauge (Nr = speed of rotation) / rotor speed sensor

Motor PWM speed separated from PID speed

engine idling speed adjusting screw

engine speed range

high engine speed

full-speed trial of engine

engine speed adjustor

engine idle speed

reaction engine / motor (jet engine)

rotary engine (Wankel engine)

engine ground run / engine test

engine oil reservoir / engine oil tank

airbreathing jet engine / ducted jet engine

apparent speed

average speed

blade speed

convoy speed

critical speed

cross-country speed

endurance speed

exhaust speed

full speed (naut.)

gear speed decreaser

group transit speed

high-speed antiradiation missile (HARM)