1Dk4eXg

DV
DV 1 Distinguished visitor (US).
2 Direct-vision (window).
3 Digital voltmeter.
4 Demonstrator/validation [also Demval].
DVA 1 Design verification article.
2 Doppler velocimeter/altimeter; often DV/A.
3 Diverse vector area [prescribed route not required].
4 Dynamic vibration absorber.
DVB Digital video broadcast, or broadband.
DVC 1 Direct voice control.
2 Digital voice communication[s].
3 Digital video conversion.
DVD 1 Direct-vendor delivery.
2 Direct-view display.
3 Digital versatile disk.
DVE 1 Design verification engine.
2 Degraded visibility environment.
DVF Demonstration and validation facility.
DVFR Defense Visual Flight Rules; procedures for use
in an ADIZ (US).
DVG Display video generator.
D/VHF Doppler/VHF.
DVI Direct voice input.
DVI/O Direct voice input/output.
DVIT Digital video image [or imaging] transmission
[S adds system].
DVK Deutsche Versuchsanstalt für Kraftfahrzeug und
Fahrzeugmotoren (G).
DVL 1 Deutsche Versuchsanstalt für Luft- und
Raumfahrt.
2 Data/voice logger.
DVLP Develop.
DVLS Digital voice-logging system.
DVM Digital voltmeter.
DVMC Digital video map computer.
DVMS Direct-voice management system.
DVO 1 Direct-view, or vision, optics (or optical or
option).
2 Direct voice output, synthesized speech confirming
correct acceptance of DVI, and sometimes giving spoken
warnings.
DVOF Digital vertical obstruction file, for terrainreferenced
nav.
DVOR Doppler VOR, hence DVortac. Confusingly,
this is now also being translated as “direct VOR”.
DVR 1 Direct-view radar [D adds display, I indicator].
2 Design verification review.
DVRS 1 Display, or digital, video recording system.
2 Digital voice recorder, or recording system.
DVS 1 Doppler velocity sensor.
2 Deutscher Verband für Schweisstechnik (G).
DVST Direct-vision, or view, storage tube.
DVT 1 Deep-vein thrombosis.
2 Delta voice terminal.
DW 1 Double wedge (aerofoil).
2 Drop weight.
3 Dual wheels.
D/W 1 Depth-to-width ratio in electron-beam hole
drilling.
2 Drag-to-weight ratio.
DWan Direct wide-area network.
dwarf sonobuoy Smallest size, same 124 mm diameter as
A-size but length only 305 mm (12 in).
DWC Distributed weapons co-ordination (CC&D).
dynamic head
DWD Deutscher Wetterdienst [meteorological service;
D-63004 Offenbach/M] (G).
DWDF Delta-wing dual-fuselage.
DWDM Dense wavelength division multiplexing, or
multiplexed] .
DWE Doppler wind experiment.
dwell 1 Brief rest period at end(s) of sinusoidal or other
oscillatory motion, eg spot scanning CRT tube, bottom of
drop-forging stroke, TDC and BDC in piston engine.
2 Period when scanning [eg, radar] beam remains
looking at a particular target, to enhance resolution.
dwell illumination region Operator-selectable region of
sky on which a surveillance radar can concentrate,
ignoring remaining coverage.
dwell mark Caused by skin-mill, routing or similar tool
remaining too long over one spot.
dwell time Among other meanings, the time spent in US
between overseas tours (US armed forces).
DWG Digital word generator.
DWI Installation for generating giant magnetic pulses
to explode mines (from cover name Directional Wireless
Installation).
DWN Downdraughts.
DWP Digital wave processing.
DWPNT Dewpoint.
DWR Drag/weight ratio.
DWS Dispenser weapon system.
DWT Deutsche Gesellschaft für Wehrtechnik eV (G).
DWV Seaplane association (G).
DX 1 See duplex.
2 Distance.
dyadics Sets of generalised vectors of aircraft motion
[with not the usual three but nine components].
Dycoms Dynamic coherent measuring system.
DYN Dynamic pressure (EDP code).
dyn see dyne.
Dynafoam Polyurethane elastomer becoming almost
standard as seat filling.
dynamic Frequently refreshed [computer memory].
dynamic amplifier Audio amplifier whose gain is
proportional to average intensity of audio signal.
dynamic aquaplaning Landplane tyres running at high
speed over shallow standing water and riding up out of
contact with runway.
dynamic balance Rotating body in which all rotating
masses are balanced within themselves so that no
vibration is produced.
dynamic clash detection Vital part of design process in
which 3-D computer imaging is used to confirm that all
parts of an assembly can be removed and replaced as in
future maintenance.
dynamic component See dynamics.
dynamic damper Device intended to damp out vibration
by setting up forces opposing every motion.
dynamic directional stability Cnß dyn , refinement of
divergence treatment of a/c, esp. supersonic fighters, by
Moul/Paulson 1958.
dynamic factor Ratio of load carried by structural part
in accelerated flight to corresponding basic load (see load
factor).
dynamic flight simulator Normally, flight simulator
whose cabin is mounted on a centrifuge.
dynamic head See dynamic pressure; also called kinetic
head.
217