tip speed ratio

blade tip light / main-rotor blade tip light

main-rotor blade tip light blade tip light

hub-tip ratio

reduction ratio / gear ratio

Voltage Standing Wave Ratio (VSWR) / voltage standing-wave ratio

jam to signal ratio (J/S ratio)

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

pointed tip

projectile tip

spoil tip

target intelligence package (TIP)

wing tip

tip of comb

finger tip control

finger-tip adjusting

wing-tip aileron

blade-tip vortex

tip rib

active blade-tip clearance control system

wing tip clearance line

circumferential tip velocity

exhaust pipe tip (left)

exhaust pipe tip (right)

helical tip velocity

non-removable tip

plane of rotation / tip path plane

removable tip

tip path plane / plane of rotation