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R smc
2 Response surface model[s], or modelling, or methodology.
R smc Random-access channel for air/ground signals.
RSMMC Rapidly solidified metal-matrix composite.
RSN Regional subnetwork.
RSO 1 Reconnaissance Systems Officer, or operator.
2 Regional Safety Officer.
3 Runway Supervisory Officer.
RSP 1 Radar start point.
2 Responder beacon, or response (ICAO).
3 Radar signal processor.
4 Revenue-sharing participant.
5 Risk-sharing partner.
6 Reversion Select Panel.
7 Required surveillance performance.
8 Responsive space program (AFRL).
9 Replenishment spare parts.
RSPD Rapid-solidification plasma deposition.
RSPL Recommended spare-parts list.
RSPT Report [when] starting procedure turn.
RSR 1 En-route surveillance radar.
2 Radar service request.
3 Rapid solidification rate; P adds process.
RSRA Rotor-systems research aircraft.
RS-RDX Reduced-sensitivity RDX.
RSRE Royal Signals and Radar Establishment, Great
Malvern.
RSRM 1 Reusable solid rocket motor; not multipulse,
but refurbished after each mission.
2 Redesigned solid rocket motor [2005–] (US).
RSRS Radio and Space Research Station, now
Appleton Laboratory.
RSS 1 Relaxed static stability.
2 Reflection suppressor system (SSR).
3 Radar subsystem.
4 Reliability and Safety Society (UK).
5 Remote surveillance system.
6 Rosette scanning seeker.
7 Root/sum/square.
8 Received signal strength; I adds indicator.
9 Remote Sensing Society (UK).
10 Responsive small spacelift (USAF).
11 Rotating seal system.
RSSK Rigid seat survival kit, opened during descent.
RSSN Reaction-sintered silicon nitride.
RSSP Radar Systems Specialist Panel (ICAO).
RST 1 Recording storage tube.
2 Reheat specific thrust.
3 Rapidly solidified titanium.
RSTA Reconnaissance, surveillance and target acquisition.
RSTD, rstd Restricted.
RSTE Reynolds-stress transport equation[s].
RSTM Reynolds-stress transport model.
RSTR Restricted.
RS232, RS422 Commercial radio standard databuses
used in aviation.
RSU 1 Runway supervisory unit.
2 Rate sensor unit.
3 Remote sampling unit.
4 Relay switching unit.
5 Repair and salvage unit.
R SU Vertical load on landing-gear leg during wheel spinup.
RTF
RSV 1 Reserve [fuel].
2 Reparto Sperimentale di Volo (I).
RSVP 1 Restartable solid variable-pulse [rocket].
2 Rotating surveillance-vehicle platform.
RT 1 Real time, often followed by control, display, environment,
interface, language, management, processor,
system, etc.
2 Reaction time.
3 Remote terminal [followed by suffix letter].
4 Resistance training.
5 Replaceable tile[s], or RSI (1).
6 Right turn after takeoff.
7 Registered traveler (TSA).
R/T 1 Radio/telephone, or telephony, or telecommunications.
2 Receiver/transmitter (beacon).
R T Taper ratio.
RTA 1 Real, or required, time of arrival.
2 Real-time acquisition.
3 Rotation target altitude.
4 Receiver/transmitter antenna.
5 Research and Technology Agency, supports RTO(6)
(NATO).
6 Revolutionary Turbine Accelerator.
7 Rudder-trim actuator.
8 Rapid-theater attack.
RTAF Royal Thai air force [UK usage].
RT&BTL Radar tracking and beacon tracking level
(ARTS).
RTAP Rapid technology application program.
RTB 1 Return, or returned, to base.
2 Research and Technology Board, decides policy
(NATO).
3 Rocket [ICBM] repair technical base, each numbered
(R).
R/TBDA Real-time battle-damage assessment.
RTC 1 Real-time control; AF adds autonomous flight.
2 Rotorcraft.
3 Resident Training Center (USAF).
4 Real-time clock.
5 Reduced temperature configuration.
RTCA Radio Technical Commission for Aerospace
[originally, from 1935, Aeronautics, office Washington
DC] (US).
RTD 1 Radar-target designator control.
2 Delayed, or routine time delayed.
3 Real-Time display.
4 Research and technology development.
5 Routed.
6 Resistance temperature detector, these have variable
resistance.
RTDC Real-time damage computation.
RTDF Radial temperature distribution factor.
RTDS Real-time dissemination shelter.
RTE Route.
RTEL Runway threshold and end lights [co-located].
RTES Real-time embedded system.
RTF 1 Radiotelephone or radiotelephony (ICAO), also
rendered rtf.
2 Round-trip flight.
3 Remote test facility.
4 Real-time fusion; I adds of information.
5 Also RT/F, revisit time/frequency (satellite).
6 Repair & Transport Flight (RAF).
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