rotor speed sensor / Nr gauge

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

oil gauge / oil-gauge

electronic fuel gauge sensor

lateral dual rotor system / side-by-side rotor helicopter

main-rotor head / main-rotor hub

main-rotor hub / main-rotor head

main-rotor speed

rotor speed / Nr

supersonic speed (exceeds speed of sound / Mach 1)

variable-speed with speed control

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

cruise speed / cruising speed

off-gauge cargo; out-/ oversized cargo

outsized cargo; off-gauge / oversized cargo

head-space gauge

gauge port

bore gauge

bullet-hole gauge

caliber gauge (for ordnance)

caliper gauge

case-ring gauge

caster camber and king pin gauge

cylinder gauge

water circulation gauge

wide gauge

wind-gauge arc

distance gauge

interior pressure gauge

fluid level gauge

fuel gauge adapter

absolute pressure gauge

gasoline gauge line