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R B
2 Rapid-bloom (ECM).
3 Radar-blip identification message.
4 Reduced blast (NW).
5 Relative bearing.
6 Readback.
7 Rain began [time].
8 See * switch).
9 Rudder boost.
R B See Rockwell.
Rb Robot, = guided missile (Sweden).
R b , r b Solid rocket motor burn rate; also r.
r b , R b Bypass ratio.
RBC Rapid-bloom countermeasures (or chaff).
RBCC Rocket-based combined cycle, also called
RBC2.
RBCI Radio-based combat identity, or identification.
RBD Radar-beacon digitizer.
RB/ER Reduced blast, enhanced radiation (neutron
bomb).
RBF 1 Remove before flight.
2 Radial basis function.
RBG Right back-up generator.
R-BGAN, RBGAN Regional broadband global area
network.
RBGM Radar-beam, or real-beam, ground-map operating
mode.
RBI 1 Relative-bearing indicator.
2 Radar-blip identification (ICAO).
RBIM Rudder-boost internal monitor.
RBL Range and bearing launch.
RBM 1 Wing-root bending moment.
2 Real-time batch monitor.
RBN, RBn Radio beacon.
RBOC Rapid-bloom offboard countermeasures.
RBPS Rotor-blade protection system.
RBS 1 Radar beacon system (FAA).
2 Rutherford back-scattering.
3 Radar bomb scoring.
RBSJ Recirculating-ball screwjack.
RB switch Selects radio or barometric altitude, eg on
HUD.
RBT 1 Remote batch terminal.
2 Resistance-bulb thermometer.
RBV Return-beam vidicon.
RC 1 Rotating-combustion, engine of Wankel type.
2 Reaction control.
3 Resistance/capacitance (also R-C).
4 Rotating components of gas-turbine engine.
5 Rate of climb at MTOW, or r/c.
6 Radio-controlled, or R/C.
7 Rounds counter.
8 Reverse course [= back course].
9 Radar computer.
10 Rotary coupler (AWACS).
11 Remote command.
12 Radar corridor.
R-C Resistor/capacitor network.
R C See Rockwell.
r c 1 Radius of inlet core bullet over hub of gas-turbine
fan or LPC.
2 Radius of helicopter vortex core.
r/c Rate of climb.
RC-1 Rate of climb, one engine inoperative.
RC-2 Rate of climb, all engines operating.
RCP
RCA 1 Reach cruising altitude (ICAO).
2 Radar coverage area.
3 Radio Communications Agency (UK).
RCAFA RCAF Association [office, Ottawa, PQ]
(Canada).
RCAG 1 Remote center air/ground (FAA).
2 Rescue, or remote, communications air/ground.
RC&W Rack connectors and wiring.
RCB Remelted cast bar.
RCC 1 Reinforced carbon/carbon.
2 Rescue co-ordination [or control] centre.
3 Resistance/capacitance coupling (often r.c.c.).
4 Research Consultative Committee (UK).
5 Repetitive chime clacker.
6 Remote charge converter.
7 Regional control centre.
8 Ring case configuration [turbofan].
RCCB Reverse-current circuit-breaker.
RCDI Rate of climb/descent indicator, = VSI.
R-CDL Radar common data link.
RCDS 1 Royal College of Defence Studies [London
SW1X 8NS] (UK).
2 Radio-controlled destruction system.
RCDU Radar control display unit (UK E-3D).
RCE 1 Rotating-combustion engine.
2 Radio control equipment.
RCF 1 Radio communications failure message (ICAO).
2 Remote-control facility.
RCFAM Roll-coupled fuselage aiming mode.
RCFCA Royal Canadian Flying Clubs Association
[office, Ottawa, PQ]..
RCFWT Radio-controlled fixed-wing target.
RCG Reaction-cured glass, covers thermal-protection
tiles (Space Shuttle).
RCH Reach, reaching.
RCJ Reaction control jet.
RCL 1 Runway centreline; L adds lights, L30m [for
example indicates light spacing].
2 Radio communications link.
RCLM Runway centreline marking (FAA).
RCLR Recleared.
RCLS Runway centreline light system (FAA).
RCM 1 Radio countermeasures.
2 Reliability-centred maintenance.
3 Rollercoaster manoeuvre.
4 Restricted corrosive material.
5 Reciprocating chemical muscle.
6 Requirements criteria and methods (ICAO).
RCMAT Radio-controlled miniature aerial target.
RC/MC Rounds counter, magazine controller.
RCMG Rifle-calibre machine gun.
RCMP Radar control and maintenance panel.
RCMS 1 Resonator-controlled microwave source.
2 Remote control [and] monitoring system.
RCMU Remote control and monitoring unit.
RCO 1 Remote communications outlet.
2 Range control officer.
3 Remote control officer (or operator).
RCOH Refueling and complex overhaul [CN, previously
CVN] (USN).
RC/OI Reaction control/orbital insertion subsystem.
RCP 1 Role-change package.
2 Radio control panel.
3 Required communications performance.
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