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major join
act to offset failure; hence immediate shut-off of failure is
not necessary.
major join Erection of aircraft, esp. mating fuselage to
wing.
MAK 1 Interstate aviation committee (R, CIS).
2 Maximal Arbeitsplatz Konzentration, standard for
air pollution (Int.).
mAk Maritime Arctic air mass, colder than surface.
make v buy The fundamental decision whether to make
a part or subcontract it to a low-cost [third-world]
supplier.
MAL Maximum allowable, hence *TOGW.
Malch, MALCH Multiple-access laser communications
head (LEO satellite)
Mald, MALD Miniature air-launched decoy; -J adds
jammer.
MALDT Mean administrative and logistics delay time.
MALE Medium-altitude long-endurance.
MALF Mostly aloft, precipitation not reaching ground.
M-Alfens Messaging automated low-flying flight planning
enquiry and notification system [now MFMIS].
MALJ Miniature air-launched jammer.
Mallory See mercury battery.
MALM Master Air Loadmaster.
MALS Medium-intensity approach light system; F
adds sequenced flashing, R adds with runway-alignment
lights.
Malta Microprocessor aircraft landing training aid.
MALV Miniature air-launched vehicle, unrelated to
MALD/MALJ.
MAM Mission adapter module.
Mamba Mobile artillery-monitoring battlefield radar.
Mamis Mandatory aircraft modifications and inspections
summary (FAA).
mammatus Cumuliform cloud with pendulous bulged
undersurface.
Mammut Luftwaffe surveillance radar, 1944.
MAMS Mobile air movements squadron (RAF).
MAMT Multi-axial, or -axis, materials technology.
MAN Military Aviation Notice.
manacle Mounting in form of calipers surrounding and
gripping circular section hardware, eg generator.
Manchester coding See biplane coding.
Manclos Manual command to line of sight.
M&A Mergers and acquisitions.
mandatory To be complied with, often as AOG modification.
Mandatory Permit Directive Grounds the aircraft
(CAA).
M&ES Magnetic and electromagnetic silencing.
M&O 1 Maintenance and overhaul.
2 Maintenance and Operations.
M&R Maintenance and repair.
Mandrel High-power radar jammer (RAF, 1943).
mandrel Centrebody, usually circular section, around
which tubular or female part is hand-forged, extruded or
formed.
M&S 1 Marred and scarred (US category).
2 Modelling and simulation.
maneton Pinch-fit coupling for female part tightened by
bolt around (usually smooth-surface) pin, eg crankshaft
web or big end.
manganese Mn, hard silver-white metal, density 7.3,
MPt 1,244°C, important as alloying element in tough
manoeuvring envelope
corrosion-resistant steels and with light alloys, brasses
and bronzes.
manganese bronze Golden alloy, resistant to marine
corrosion, sometimes used for compressor blading
(DTD.197).
Manicom Manned information and communication
facility.
manicured Beautifully kept [grass airfield].
manifest List of all passengers and cargo for one flight.
manifold Fluid pipe system distributing from single
input to multiple outputs or vice versa (thus piston engine
inlet *, exhaust *).
manifold pressure Pressure in inlet manifold of piston
engine, normally local atmospheric plus boost (US
traditionally inches Hg).
manipulator 1 Mechnaical device resembling enlarged
and more powerful human arm for positioning items in
space.
2 Flat-plate aerofoil projections through aircraft
boundary layer to cause major re-energization.
manning the rail Crew of warship, esp. carrier, line maindeck
periphery on entering/leaving harbour.
manoeuvrability Measure of the maximum rate of
change of magnitude and direction of the velocity vector.
US maneuverability.
manoeuvrable re-entry vehicle One which is capable of
performing accurate preplanned flight manoeuvres
during re-entry (DoD).
manoeuvre, maneuver Any deliberate departure from
straight-level flight or existing space trajectory.
manoeuvre ceiling Maximum height at which aircraft, at
given weight, can sustain specified load factor after onset
of buffet; highest point of each buffet-boundary line.
manoeuvre diagram Usually means V-n diagram or
manoeuvring envelope.
manoeuvre flap Usually small forward-hinged plate
depressed under power from underside of inner wing at
20–40% chord to cause powerful nose-up trim change.
manoeuvre enhancement Capability of a direct-forcecontrol
aircraft to achieve more rapid normal acceleration
(upon pilot selection), typically by use of symmetric wing
flaps for immediate increase in lift to eliminate difference
between g (A n ) commanded and achieved.
manoeuvre induced error Instrument error, usually
pressure, gyro or magnetic, caused by flight manoeuvre.
manoeuvre load factor Load factor (2).
manoeuvre margins Two distances (stick-fixed and free)
measured as % SMC from manoeuvre points to c.g.
position.
manoeuvre motion Real or simulated motion of cockpit
resulting from pilot’s control input, unlike disturbance
motion.
manoeuvre point Point around which aircraft rotates
about all axes. Stick-fixed ** is c.g. position at which stick
movement per g is zero; stick-free ** is c.g. position at
which stick force per g is zero.
manoeuvring area Area of airfield used for takeoffs,
landings and associated manoeuvres (NATO).
manoeuvring ballistic re-entry vehicle For practical
purposes synonymous with manoeuvrable re-entry
vehicle.
manoeuvring control force Stick force per g.
manoeuvring envelope Basic design envelope in which
permissible speed (EAS) is plotted against load factor.
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