propeller speed controller

proportional–integral–derivative controller (PID controller / three-term controller)

terminal attack controller (TAC) (= forward air controller)

negative thrust propeller / negative-thrust propeller

electronic speed controller (ESC)

constant-speed propeller

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

air controller

controller (exercises)

fighter controller

forward air controller (FAC)

Special Operations Terminal Attack Controller (SOTAC)

tactical air controller

joint terminal attack controller (JTAC)

forward air controller (airborne) FAC(A)

forward air controller party

ground-based forward air controller

heliborne forward air controller

brake controller

combat controller

Controller Interceptor Trainer (CIT)

fluid-operated controller

differential pressure controller

pressure ratio controller

controller clearance

altitude controller

track controller

side-stick controller

controller