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maximum q
highest altitude at which maximum boost pressure can be
maintained.
maximum q Highest dynamic pressure attainable; for
given aircraft, function of dive limits, atmospheric pressure
and structural strength.
maximum ramp weight The highest of all certified
weight, = MTOW/MTWA plus fuel allowance for startup
and taxi.
maximum reading accelerometer Records maximum
reached.
maximum rpm In shaft-drive engines, invariably a transient
overspeed condition permitted by lag in propeller or
engine-speed control system.
maximum speed Highest TAS attainable in level flight,
at best altitude.
maximum structural payload Combined weight [or
capacity] of pax, baggage and cargo certificated to be
carried on main deck and in belly holds.
maximum takeoff rating In jet engine, achieved by
selecting water [if available] and advancing throttle to give
TO EPR.
maximum takeoff weight See MTOW.
maximum turn rate That giving maximum number of
deg/s rate of change of heading, ie rotation of longitudinal
axis; unrelated to change in trajectory.
maximum undistorted output Peak signal strength
consistent with intelligible speech in early radio.
maximum usable frequency Highest for shortwave
communications between fixed points using ionospheric
reflection (time-variant).
maximum vertical speed, Vm Rare flight limitation
demonstrated in VTOL aircraft, including civil-certificated
helicopters.
maximum weight See MTOW, MLW, MZFW etc.
maximum weak mixture Highest power normally available
from piston engine throughout flight; rich-mixture
ratings can reduce engine life and aircraft range.
maximum zero-fuel weight The maximum weight certificated
with no usable fuel, probably less than MTOW
minus usable fuel because wing fuel relieves the wing
bending moment. Put another way, adding fuel may allow
payload to be increased above that at MZFW.
Maxpac Multi-axis pintle attitude control.
Maxwell Non-Si unit of magnetic flux (conceptualised
as “single line” of flux), = 10 –8 Wb.
Mayday International call for urgent assistance, from
French “m’aidez!” Hence, to declare a *, to go *; usually
sent on 121.5 MHz.
MB 1 Magnetic bearing.
2 Marker beacon.
3 Mercury bromide (laser).
4 Megabits.
5 Multimedia broadband.
6 Manchester biphase.
7 Very incorrectly, millibars.
Mb Mbyte (megabyte), one million bytes.
mb Millibar[s].
m b 1 Mass flow through turbofan bypass duct.
2 Mass of a bird.
MBA Main battle area.
MBAR, M-bar Multi-beam acquisition radar.
MBAT Multibeam array transmitter.
MBC 1 Main-beam clutter.
2 Microbiological corrosion.
m/c
3 Military Budget Committee.
4 Missile boresight correlator.
5 Maritime Battle Center (NWDC).
MBCS Manoeuvre-boost control system; senses
aircraft response and adjusts flight controls for fastest
completion of demand.
MBD Molecular-beam deposition.
MBDOE Million barrels per day oil equivalent.
MBE 1 Molecular-beam epitaxy.
2 Multiple-bit error.
MBEC Maximum best-economy, or economical,
cruise, or cruising; P adds power [piston engines].
M β Aerodynamic flapping moment of helicopter rotor
blade.
MBF Multi-body freighter.
MBFR Mutual and balanced force reductions.
MBFS Maximum boom-free speed.
MBIL Multi-beam illuminator [BC/FC].
Mbit Megabit = 2 20 = 1,048,576 bits; /S adds per second.
MBITR Multi-band inter/intra team radio.
MBK Missing, believed killed.
MBM Magnetic bubble memory.
MBMMR Multi-band multi-mode radio.
MBO Management by objectives.
MBOH Minimum break-off height.
MBP 1 Maximum takeoff regime (USSR, Cyrillic
characters actually represent MVR).
2 Minimum burner pressure; V adds valve.
MBPS, MBps, MB/s Megabits/second.
Mbps Megabytes/second.
MBR Marker-beacon receiver.
MBRGW MBRW (adds redundant ‘gross’).
MBRV Manoeuvrable ballistic re-entry vehicle.
MBRW Maximum brake-release weight, at start of
takeoff run.
MBS 1 Millibars (on alphanumeric readout).
2 Mobile base system (ISS robotic interface).
3 Modular bomb set, for making IEDs for training.
4 Mean blade speed.
5 Mossbauer spectrometer.
mb/s, mb/sec Megabits per second.
MBsat Multimedia broadband satellite(s).
MBSU Main-bus switching unit.
MBTH Material by the hour.
MBX Management by exception.
Mbytes Megabytes, = 2 20 = 1,048,576 bytes.
MBZ Mandatory broadcast zone.
MC 1 Marine Corps (USMC).
2 Medium-case, or capacity (bomb).
3 Magnetic course.
4 Multi-combiner (HUD).
5 Maximum certificated (altitude).
6 Manufacturing cost.
7 Mission-capable.
8 Motion cueing.
9 Master change.
10 Military characteristics (of NW).
11 Materials consortium.
12 Main, or mission, or monitoring, or multifunction,
computer.
13 Megacycles (incorrect usage).
M c 1 Design cruise Mach number.
2 Couple causing bending.
m/c 1 Machined.
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