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un-up
4 A composite tolerance specified for a part of basically
circular form; circular * detects variations in circulatory
and coaxial misregistration, total * adds [e.g.] straightness,
taper and position.
run-up 1 To accelerate engine under own power.
2 Portion of flight immediately preceding target run.
3 To test piston engine, briefly at high power and to
check dual ignition, before takeoff.
run-up area Portion of airfield near taxiway designated
for run-up (3).
run-up drag 1 Drag caused by windmilling propeller in
air-start.
2 Drag caused by need to accelerate landing wheels on
touchdown.
runway Paved surface, usually rectangular and of
defined extent, available and suitable for aeroplane takeoff
and landing. Equipped * includes stopway, clearway,
surface markings and designators. All-weather * includes
lighting. Instrument * adds electronic aid, eg ILS, MLS.
Unpaved * = airstrip.
runway alignment Direction of runway centreline,
published as first two digits, in both directions, eg 13/31;
also called direction number. See runway designator.
runway alert system Passively monitors ASDE and
other sources to detect potential RWI.
runway alignment factor Maximum angular departure
from alignment admissible for straight-in approach,
normally 30°.
runway alignment indicator Group of flush lights
offering directional guidance on takeoff (to some degree
on landing) in bad visibility.
runway basic length That length selected for aerodrome
planning purposes required for takeoff or landing in ISA
for zero wind, elevation and slope.
runway capacity Frequency of landings and/or takeoffs,
or mixture, possible or permissible with minimal
approach spacing, published for IFR and VFR. In
complete airport varies greatly with number and arrangement
of runways, and conflicts of crossing traffic.
runway condition Numerical output from braking
[decelerometer] tests.
runway controller ATC controller stationed, usually in
caravan with checkerboard markings, close beside downwind
end of runway in use; equipped with signal pistol,
Aldis and telephone to tower (rare since WW2).
runway designator Numerical alignment plus qualifier
left/right if necessary; thus New York JFK offers 4R/22L,
4L/22R, 13R/31L and 13L/31R.
runway direction numbers Numerical values of alignment.
runway-edge lights White lights grouped according to
intensity: fixed-intensity LIRL (low-intensity runway
lights) and variable MIRL and HIRL. Designed to withstand
flying stones.
runway end End of runway in use, identified by markings;
beyond may be similar-surfaced blast pad, overrun
(RESA) or stopway and (unpaved) clearway.
runway-end lights, REIL Often pair of flashing white
lights, at major airport continuous transverse row of bidirectional
lights showing green towards approach and
red towards runway.
runway-end safety area UK term for overrun area; area
adjoining runway in use, symmetrical about extended
centreline, intended to minimize damage to undershoot or
overrun aircraft.
runway floodlight Appears incorrectly in some
dictionaries; does not exist.
runway gradient Not used; correct word is slope.
runway guard Flashing yellow lights where taxiway
meets runway.
runway incursion Crossing runway in use, or taxiing
beyond takeoff holding point, without ATC clearance.
Abb. RWI.
runway localizer See localizer.
runway markings Basic, 2-digit direction number and
centreline; Instrument adds threshold; All-weather
(precision) adds side strips and zones.
runway occupancy Elapsed time particular aircraft is on
runway, on arrival or departure.
runway profile descent Published procedure for
complete IFR controlled arrival from en-route to glidepath.
runway separation Time and distance intervals between
arrivals and/or departures on one runway. Distance
between parallel runways is spacing.
runway spacing Perpendicular distance between centrelines
of parallel runways at same airport.
runway strip Defined area including runway and
stopway intended to reduce risk of damage to aircraft that
run off runway in any direction and to protect aircraft
flying over it during takeoff or landing.
runway threshold Threshold (1).
runway turnoff lights Fixed wide-beam white lights
on each side of the forward fuselage giving lateral
illumination.
runway visibility value, RVV Determined for particular
runway by transmissometer with readout in tower; generally
being replaced by RVR.
runway visual range, RVR Value representing horizontal
distance pilot will see centreline or edge lights or runway
markings down runway from approach end. Once
recorded by an observer 76 m from centreline, now by
RVR system.
RUR Ship-launched anti-submarine rocket (USN
code).
RUSA Roll-up solar array.
RUSI Royal United Services Institute for Defence
Studies [London SW1A 2ET] (UK).
Ruslick Anti-corrosive coating for bright metal in saline
(ocean) environment.
Rustilo Proprietary anti-corrosive inhibiting oil.
RUT Standard regional route transmitting frequencies
(ICAO).
Ruticon Family of photoconductive/liquid-crystal
devices used in large-screen projection, typically with
potential across photoconductor and elastomer with
mirror surface for readout, scanned on opposite face by
CRT input.
RV
1 Radar vector.
2 Re-entry vehicle.
3 Residual value.
4 Rescue vessel (RAF, ICAO).
5 Rescue vehicle.
6 Rendezvous.
Vertical load reaction on landing gear.
Radius of vortex-release point along helicopter rotor
blade.
R V
r v
r v
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