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MDLT
MDLT Mobile data-link terminal.
MDM Multiplexer-demultiplexer.
MDNS Managed data network services.
MDNT Missile Defense National Team (US).
MDO Multidisciplinary design organization, or optimization.
MDOF Multiple degrees of freedom.
MDP 1 Motor-driven pump.
2 Maintenance data panel (1553B data-bus).
3 Maximum dry power.
4 Modular display processor.
5 Multi-designation protocol.
6 Material deficiency report.
MDPC Mission and display processing computer.
MDPS Metric data-processing system.
MDPU Modular data-processing unit.
MDR 1 Mandatory defect reporting.
2 Magnetic-field dependent resistor.
3 Medium data-rate.
4 Micro-data recorder, linking surveillance radars with
computers.
5 Mission data recorder.
6 Material deficiency report.
M DR Drag-rise Mach number.
MDRC Material Development and Readiness Command
(USA).
MDRI Multipurpose display repeater indicator.
MD/RWW Map display and report-writing workstation,
part of GIES.
MDS 1 Minimum discernible, or detectable, signal.
2 Metal-dielectric semiconductor.
3 Matériels de servitude, ie GSE (F).
4 Mission/design/series, basic system of designators of
military aircraft (US).
5 Multilevel database system.
6 Measurement and debriefing station, or system
[Tacts].
7 Manned destructive suppression.
8 Miss-distance sensor.
9 Medium-distance [EO] sensor.
10 Maintenance data station.
11 Mission distribution system.
12 Meteorological data system.
13 Modular dispenser system.
14 Mid-course defense segment [see GMDS].
15 Mobile data service.
16 Multi-static dependent surveillance, synonymous
with multilateration.
17 Master dimension surface.
MDT 1 Maintenance display terminal.
2 Mission-data tools, or terminal.
3 Mountain daylight time (US).
4 Moderate.
MDTC/P Mega-data-transfer cartridge, with processor.
MDTS 1 Mission data-transfer system.
2 Megabit digital troposcatter subsystem.
MDU 1 Microwave distribution unit.
2 Mine distributing unit.
MDV Minimum detection velocity.
MDWP Mutual Defense Weapons Program.
MD/WT Marine division/wing team (DoD).
ME 1 Manoeuvre enhancement mode.
2 Multi-engine, or main engine.
3 Mission-essential.
Mearts, M-EARTS
4 Maintenance error.
M€ Millions of Euros.
M e Merkel number.
mE Maritime equatorial air.
m e Electron rest-mass.
MEA 1 Minimum en-route IFR altitude.
2 Maintenance engineering analysis.
3 More-electric aircraft.
meacon To mislead enemy by receiving and instantly
rebroadcasting radio-beacon signals from false positions.
Meads 1 MEA (2) data system.
2 Medium extended air-defense system (USA, G, I).
mean aerodynamic chord Chord of imaginary wing of
constant section having same force vectors under all
conditions as those of actual wing, symbol = c (in practice
usually very close to mean chord c – ).
mean blade width ratio Ratio of mean chord (width) of
propeller blade to diameter.
mean chord Gross wing area divided by span, symbol c – .
mean day Time between successive transits of mean Sun.
mean effective pressure Mean pressure acting on piston
during power stroke in Otto, diesel, two-stroke, Stirling
and most other reciprocating IC engines.
mean fleet performance Mean (sometimes average)
flight performance (sometimes other parameters, eg
engine IFSD rate) of entire airline fleet of one aircraft
type.
mean free path 1 Mean distance point could move in
straight line without collision with surrounding fluid
molecule; greater than mean distance between fluid molecules.
2 Mean distance a sound wave travels in an enclosed
space before being reflected.
mean geometric pitch Mean of geometric pitches of all
elements from root to tip of propeller blade, symbol Pg.
mean line In a two-dimensional aerofoil profile, locus of
points equidistant between nearest points of upper and
lower surface from LE to TE.
mean line of advance Planned future track of centre of
ships in convoy.
mean point of contact Point whose co-ordinates are
arithmetic means of co-ordinates of impacts of all
weapons launched against same aiming point.
mean sea level Average height of sea surface, usually
calculated from hourly tide readings (in US, measured
over 19-year period).
means of compliance Methods and techniques formally
demonstrated by manufacturer seeking certification of
product from licensing authority.
mean solar day Period between transits of mean Sun,
24 h 3 min 56.555 s of mean sidereal time (see sidereal).
mean square value Arithmetic mean of squares of all
values; * error equals sum of squares of errors divided by
their number.
mean time between failures For specified time interval,
total operating time of population of materiel divided by
total number of failures within population (USAF).
mean time to repair For specified time interval, summation
of active repair times divided by total number of
malfunctions (USAF).
MEAP More-electric aircraft project (DSB).
Mearts, M-EARTS Micro en-route automated radar
tracking system.
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