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Dews
Dews Digital electronic-warfare simulator.
DF, D/F 1 Direction-finding (or finder).
2 Digital filter.
3 Directed-flow (reverser).
4 Methylphosphonic difluoride, component of GB
Sarin.
5 Data fusion.
6 Deutsche Flugsichering [ATC] (G), also DFS.
7 Dong Feng = east wind, family designations of
strategic ballistic missiles (China).
8 Double-fuselage.
9 Diesel fuel.
10 Defensive [or direct].
11 Downlink format.
12 Direct to fix.
D.F. Helicopter rotor damping factor.
D F Zero-lift drag, usually of whole aircraft.
DF-1, DF-2, DF-A GA specifications for diesel fuel.
DFA 1 Deutsche Flug-Ambulanz Gemeinnützige
GmbH (G).
2 Delayed-flap approach.
3 Direction-finding antenna.
4 Design for assembly.
DFAC Data-fusion analysis convergence.
DFAD Digital-feature analysis data.
DFAR Defense Federal Acquisition Regulations (US).
DFAS Defense Finance and Accounting Service (US).
DFBW Digital fly-by-wire.
DFC 1 Distinguished Flying Cross.
2 Direct force control, eg on F-16.
3 Digital fuel control [s adds system].
4 Duty-free confederation.
DFCC Digital flight-control computer.
DFCL Director(ate) of flight-crew licensing.
DFCS Digital flight – [or fuel] – control system.
DFCT Directorate of Foreign and Commonwealth
Training (UK, multiservice).
DFD 1 Digital frequency discriminator.
2 Data flow diagram (real time).
3 Digital flight data.
DFDA Defence Force Discipline Act (UK).
DFDAF Digital flight-data acquisition function.
DFDAMU DFD(3) acquisition management unit.
DFDAU Digital [or distributed] flight-data acquisition
unit.
DFDR Digital flight-data recorder; S adds system.
DFDS Digital fire-detection system.
DFDU DFD(3) unit.
DfES Dept. for Education and Skills (England).
DFF Display failure flag.
DFG 1 Digital flight guidance [C adds computer, S
system, U unit].
2 Defence Fuels Group.
3 Deutsche Forschungsgemeinschaft [D-53175 Bonn]
(G).
DF/GA Day fighter/ground attack.
DFGC Digital flight-guidance computer.
DFI Direction-finding interferometer.
DFIC Duty-free import certificate.
DFIDU Dual-function interactive display unit.
DFIR Deployable flight-incident recorder.
DFIU Digital flight-instrument unit.
DFL Dry-film lubricant.
DFLCC DFCC.
DGAC
DF loop Direction-finding aerial consisting of one or
more turns of wire on vertically pivoted frame, giving
maximum response in plane of frame, and thus PL
through ground station (see Adcock, ADF).
DFLS Day Fighter Leaders’ School (RAF).
DFM 1 Distinguished Flying Medal.
2 Digital frequency measurement.
3 Distortion-factor meter.
4 Direct-force mode.
5 Design for manufacture.
DFMS Digital fuel-, or flight-, management system.
D form Form drag.
DFQI Digital fuel-quantity indicator.
DFR 1 Dynamic flap restraint.
2 Departure flow regulation, or regulator.
3 Digital flight recorder.
DFRC Dryden Flight Research Center [previously
Facility] (NASA, at Edwards).
D fric Total frictional drag, at low speeds almost equal to
D F .
DFRR Data-fusion risk reduction.
DFS 1 Directorate of Flight Safety (UK).
2 Digital frequency synthesis, or select.
3 Deutsche Forschungsanstalt für Segelflug [glider
research institute] (G).
4 Deutsche Flugsicherung GmbH [air-traffic control;
office D-63067 Offenbach] (G).
5 Dynamic fuel-slosh measure.
6 Detailed functional specification.
DFSC Defense fuel supply center (DoD).
DFT 1 Distance from threshhold.
2 Discrete Fourier transform.
3 Demand flow technology.
4 Defence fixed telecommunications [S adds system]
(UK).
DfT Department for Transport [May 2002-; office,
London SW1P 4DR] (UK).
DFTDS Data-fusion technology demonstrator system.
DFTI Distance-from-touchdown, or threshold, indicator.
DFU 1 Digital function unit.
2 Deployable flotation unit.
3 Exhortation, Don’t f*** up!
DFV Deutsche Flugdienstberater Vereinigung (G).
DFVLR Deutsche Forschungs- und Versuchsanstalt für
Luft- und Raumfahrt, now DLR (G).
DFW Dedicated field work (USN).
DFWD Discrete flight warning display.
DFWF Direct-fire weapons effects; S adds simulator or
simulation.
DG 1 Directional gyro, = DI (2).
2 Dichromated gelatin.
Dg Maximum growth of tyre [tire] outside diameter.
DGA 1 Dispersed ground alert.
2 Délégation Générale pour l’Armement (F).
3 Director-General Aircraft, (N) adds Navy (UK).
4 Displacement gyro assembly.
DGAA Director-General for Aeronautical Armaments
(I, for NATO).
DGAC 1 Direction Générale de l’Aviation Civile (F).
2 Directorate-General of Air Communications
(Indonesia).
3 Direzione Generale dell’Aviazione Civile (I).
4 Direccao-General da Aviacao Civil (Portugal).
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