Page 93 - Aeronautical Engineer Data Book

72 Aeronautical Engineer’s Data Book
Table 4.3 Continued
IMS Integrated multiplex system.
INS Inertial navigation system.
IRCM Infrared countermeasure.
lead/lag damper Cushioning buffer designed to minimize
ground resonance.
LHX Light experimental helicopter programme.
LIVE Liquid inertial vibration eliminator.
LOH Light observation helicopter.
MTR Main and tail rotor.
NFOV Narrrow field of view.
nodamadic Patented form of vibration-damping system.
NOE Nap of the Earth, i.e. at the lowest safe level.
NOTAR No tail rotor.

OEI One engine inoperative.
OGE Out of ground effect.
RAST Recovery assist, securing and traversing — a
system to help helicopters land on a ship’s deck.
rigid rotor Rotor with a particular structure near the hub so
that rotor flex replaces the function of mechanical hinges.
ROC Required operational capability.
RSRA Rotor systems research aircraft.
SCAS Stability and control augmentation system.
SH Anti-submarine helicopter (US).
sidestick Small control column at the side of the cockpit.
Starflex Trade name of advanced hingeless rotor system
(Aérospatiale).
stopped-rotor aircraft A helicopter whose rotor can be
slowed down and stopped in flight, its blades then
behaving like four wings.
swashplate A disc either fixed or rotating on the main
rotor drive shaft, which is tilted in various directions.
tip path The path in space traced out by tips of rotor
blades.

UTS Universal turret system.

4.4 Common aviation terms
Table 4.4 Aviation acronyms
3/LMB 3 Light Marker Beacon
360CH 360 Channel Radio
720CH 720 Channel Radio
AC or AIR Air Conditioning