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M
M 1 Prefix mega, × 10 6 .
2 Mass, except BS decrees m.
3 Magnetic heading/course/bearing.
4 Mach number [also M n ].
5 Prefix minus (wind component).
6 Maxwell.
7 Dynamics, moment, esp. in pitch, with numerous
suffixes.
8 Meteorological (JETDS).
9 Mutual inductance; unit henry.
10 Molecular weight.
11 Structural bending moment, and generalized symbol
for moment.
12 Mandatory (NASA).
13 Aircraft type designation: equipped to launch
guided missiles (USN suffix 1955–62, prefix 1962–68).
14 Telecom code: ‘IFR aircraft has Tacan and
transponder with no code capability’ (FAA and others).
15 Mean anomaly of orbit.
16 Most ambiguously, thousand (ASA).
17 Prefix maximum.
18 Main.
19 Maintain.
20 Maritime air.
21 Measured.
22 Moderate.
23 Multi-mission (US role prefix).
24 MATZ penetration service [or (M)].
25 Missing.
26 Master station (Loran).
27 Magnetization intensity; magnetic polarization.
28 Medium-intensity [airfield lighting].
29 Aircraft category: tilting-wing/engine aircraft (FAI).
M* Critical Mach number.
M α Free-stream Mach number.
(M) 1 Torque, turning moment, also T.
2 See 24 above.
m 1 Metre[s].
2 Prefix milli, × 10 –3 .
3 Superplasticity.
4 Modular ratio.
5 Bypass ratio (USSR, R).
6 Mass, esp. of electron.
7 Minute[s].
8 Overlap fraction of helicopter tandem or side-byside
rotors.
9 Maximum camber of helicopter rotor blade.
10 Mach-number factor.
11 Confusingly, now being used for moment, especially
in pitch.
m ° Mass flow rate; also m ° = kg s –1 . Sometimes
written m .
m/ Internet-based modules providing toolbox for:
airborne, techlog and jobcard.
m˜ 2-D section moment [pitching moment per unit span,
nose-up positive].
M1C Cargo container half width of wide-body main
deck.
m 2 Square metres.
M 2 F 2 Multi-mode fire and forget.
M2M Machine to machine [architecture].
M3P Mini-mutes modification program.
M3R Mobile multifunctional modular radar.
M-band EM radiation, 5–3 mm, 60–100 GHz.
M-carcinotron Backward-wave oscillator in which high
power is possible by electron beam travelling between
slow-wave structure and negative sole plate.
M-day Day on which mobilization is to begin.
M-display Has horizontal timebase along which target
blip moves; operator moves second blip to line up on
target by control graduated to indicate target range.
M-generator Main generator (Gripen).
M-marker 1 Middle marker.
2 Low power NDB.
M-stoff Methanol (G).
M-wave EM millimetric wavelengths.
M-wing Wing studied for low supersonic speeds with
inner portions swept forward, outers swept back.
MA 1 Mission abort.
2 Naval aviation (USSR, R).
3 Mobilization augmentee (US).
4 Minor airfield[s].
5 Meteorological authority (ICAO).
6 Missed aproach.
7 Marker analysis.
M A Generalised term for a resultant aerodynamic
moment.
M/A Mach/airspeed.
mA Milliampere[s].
ma, Ma Mass flow (airflow); eg that passing through
engine.
MAA 1 Maximum authorized IFR altitude.
2 Monitoring angle of attack.
3 Missed-approach action.
4 Mission-area analysis.
5 Manufacturers’ Aircraft Association [initially
provided aircraft from a pool, 1917]; [office, New York]
(US).
6 Midlands Aerospace Alliance [trade assoc.; office,
Thirsk, Yorks.].
7 Museo de Aeronáutica y Astronáutica (Spain).
8 MidEast Aviation Academy, Amman (Jordan).
MAAC Medical Air Ambulance Company (USA).
MAAF Mediterranean Allied Air Force (1942–45).
MAAG Military Assistance Advisory Group (US).
MAAH Minimum asymmetric approach height.
MAAM Mid-Atlantic Air Museum (Reading, PA).
MAAP Master air attack plan; TK adds tool kit.
MAAS 1 Military air accident summary.
2 Mobile aircraft arresting system.
MAATS Military automated air-traffic system
(Canada).
MAAWLR Miniature autonomous attack weapon,
long-range.
MAB 1 Modular-array basing (ICBM).
2 Malaysia Airports Behrad (37 airports).
MABCC Military Airspace Booking and Co-ordination
Centre [Swanwick] (UK).
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