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Repin (G)
Repin (G) Replacement inertial navigation unit with
GPS added.
RePLACE Reconfigurable processor for legacy
avionics code execution.
replaceable panel Aircraft maintenance access panel
which has to be replaced; not an interchangeable panel,
which can be opened in about one-tenth the time.
replacement factor Estimated percentage of hardware
items that over given period will need replacing from all
causes except accidents.
replenishing Refilling of aircraft with consumables
such as fuel, oil, liquid oxygen and compressed gases to
authorized pressure; rearming is excluded (NATO).
replenishing phase Part of operating cycle of pulsejet in
which depression in duct induces fresh charge.
reply code That repeated series of pulses transmitted by
SSR transponder in aircraft when interrogated; typically
up to 12 information pulses between two framing pulses
20.3 μs apart.
reply-code evaluator Automatic avionic subsystem
which reads reply code and determines if valid, what
identify and in case of military IFF whether friendly or
hostile.
reply efficiency A transponder’s valid responses as
percentage of interrogations.
reporting point Geographical point in relation to which
aircraft position is reported.
repositioning Moving aerobatic aircraft from end of one
manoeuvre to start of next, at correct height/speed.
repressurant Material, eg compressed air, oxygen and
water vapour, stored in spacecraft outside pressurized
volume and fed in to refill interior after depressurized
operations.
req, REQ On request.
REQMT Requirement.
requalification To requalify approved system to meet
more severe demand or environment.
request for proposals Document sent by central government
to one or more industrial contractors outlining
future requirement stated by armed force(s) and inviting
suggestions on how this should best be met; RFP calls for
analysis of problem by manufacturer and for submission
of general scheme for hardware which in case of aircraft
and most other equipment includes three-view drawing,
basic description, estimated weights and performance,
timescale and costs.
required flightpath That necessary to satisfy immediate
task of pilot; not a recognised performance parameter but
general objective weighed against projected flightpath.
required navigation performance Measure of accuracy of
a particular segment or block of airspace.
required track Path aircraft commander wishes to
follow; refers always to future intention. Often a ruled line
joining two waypoints.
requirement 1 Predicted future need spelt out by armed
force, usually after long process of refinement and assessment
of alternatives.
2 An ingredient necessary for a successful design. See
next.
requirements capture The rigorously structured procedure
whereby, in parallel with established analytical
procedures [FHA, then PSSA], all the elements required
for a functioning device or system are gathered, with
nothing overlooked. There are two totally dissimilar
methods. In top-down the design team start with the
overall basic requirement, quantified in every detail and
work downwards until they are studying cable sizes and
case materials. In bottom-up the designers begin the fine
detail and work their way up through sub-modules and
sybsystems to reach the final product.
RER 1 Reconnaissance exploitation report.
2 Radar electrical rack.
3 Residual error rate.
RERA Recent rain.
RERP Reliability enhancement and re-engining
program.
RERTE Re-route.
RES 1 Radio emission surveillance.
2 Reserved.
3 Reservoir.
4 Radar emitter, or environment, simulator.
5 Remote, or reprogrammable, emitter simulator.
Resa, RESA 1 Research, evaluation and systems
analysis.
2 Runway-end safety area.
3 Rotating electronically scanned array.
Rescap Rescue combat air patrol.
rescue basket Lowered from helicopter to rescue person
unconscious or incapacitated.
rescue co-ordination centre Initiates, manages and terminates
rescue efforts within particular area by all branches
offering help.
research and development Generalized term covering
process of development of specific items of hardware;
research involved is usually minimal and always applied,
main effort being directed at solving engineering problems
which are invariably unpredicted and occasionally require
new fundamental knowledge; abb. R&D, but US favours
RDT&E, which is unnecessarily clumsy.
research coupling Disseminating research results to
maximize early and widespread use.
research octane number Usual scale of measurement for
anti-knock value of automotive fuels. On this basis
unleaded gasolines are 95–97 RON, while leaded might
have rich-mixture RON of 130. Aeronautical gasolines
are commonly MON-rated.
research rocket Usually unguided ballistic rocket whose
purpose is to lift scientific payload to high altitude for
free-fall or parachute descent. Very occasionally purpose
is to advance technology of rockets.
research vehicle Atmospheric or space vehicle, manned
or otherwise, whose purpose is to provide answers to
research problems; not normally prototype of production
article but often associated with specific programme.
reseau 1 Group of met. stations operating under
common direction; hence international *.
2 Grid of fine parallel lines used in image analysis.
Réseau du Sport de l’Air Association of homebuilders
(F).
reserve aircraft Those accumulated in excess of immediate
needs for active aircraft and retained in inventory
against possible future needs (DoD).
reserve buoyancy Additional mass or applied force
needed to immerse completely floats or hull of seaplane or
flying boat already at specified (usually MTO) weight.
reserve factor
minimum required for a specified condition.
reserve fuel See reserves.
reserve fuel
Ratio of actual strength of structure to
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