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moment weight<br />

moment weight Mass of gas-turbine or other blade<br />

multiplied by distance of its c.g. from axis of rotation.<br />

Moms, MOMS 1 Modular opto-electronic multispectral<br />

scanner.<br />

2 Mission Operations and Mission Services (NASA).<br />

MON 1 Above mountains (ICAO).<br />

2 Mixed oxides of nitrogen.<br />

3 Motor octane number.<br />

4 Month.<br />

Mon Monitor (NASA).<br />

Mona Advanced hyperbolic/computer/display airborne<br />

navigator system (from modular navigation).<br />

Monab Mobile naval airbase, on shore (USN).<br />

Monel Range of corrosion-resistant Ni-Cu alloys.<br />

monergol Hydrazine (F), often capital M.<br />

Money flare Flame from petrol-soaked roll of asbestos<br />

in steel basket (RAF, 1918 to WW2).<br />

Monica Large series of active radars used by RAF<br />

bombers 1943–46 for rear warning of interception.<br />

monitor 1 To listen out on a particular frequency.<br />

2 Pipe, usually on RIV or CFR vehicle, through which<br />

water/foam or other retardant is delivered.<br />

monitored system One continuously subjected to surveillance<br />

and if necessary corrective action (eg isolating failed<br />

channel) by separate avionic subsystem; feature of<br />

autoland and other highly reliable systems.<br />

monitor lane In a flight-control system, this duplicates<br />

the functions of the command lane for both the command<br />

and standby lanes.<br />

monkey strip Strong fabric strip securing backseater<br />

[esp. when standing to fire gun] to aircraft (UK, colloq.,<br />

1916–40).<br />

Monnex Dry-powder fire extinguishant.<br />

monoball mount Primary structural joint, eg pylon to<br />

wing, where loads are transmitted radially across<br />

spherical surface.<br />

monobloc 1 Shaped from single block, usually by<br />

forging or casting.<br />

2 Control surface in form of single aerofoil, not hinged<br />

downstream of fixed fin or tailplane; also called slab type<br />

or all-moving.<br />

monochromatic EM radiation of single frequency, or<br />

extremely narrow band.<br />

monochromator Various devices for filtering out<br />

unwanted wavelengths.<br />

monocoque Three-dimensional form, such as fuselage,<br />

having all strength in skin and immediate underlying<br />

frames and stringers, with no interior structure or bracing.<br />

Some purists argue there must be skin only.<br />

monocrystal Turbine blade or other item formed from<br />

metal grown as a single crystal, devoid of inter-grain<br />

boundaries which would weaken it mechanically.<br />

Adjective monocrystalline.<br />

MONOCV, Mono-CV Future single-hull aircraft<br />

carrier.<br />

monofuel Fuel used alone without need for air or other<br />

oxidant; eg HTP, MMH.<br />

monohud Monocular HUD, for one eye only.<br />

monolithic Usually means monocrystal, but see next.<br />

monolithic rocket Having solid grain cast or extruded in<br />

one piece.<br />

monomer Substance consisting of single molecules, esp.<br />

one which can be polymerised.<br />

monomethyl hydrazine Rocket propellant; hydrazine in<br />

MOQA<br />

which one hydrogen atom is replaced by methyl group<br />

N 2 H 3 .CH 3 .<br />

monoplane Aerodyne having single wing, or single wing<br />

each side of the axis of symmetry.<br />

monopropellant Monofuel used in liquid rocket, eg<br />

HTP.<br />

monopulse Radar technique using four overlapping<br />

pencil beams, two for azimuth, two for elevation, with<br />

circuitry so arranged that, when target is at centre, output<br />

voltage vanishes.<br />

monorail Installed along ceiling of paratroop transport,<br />

to which static lines are hooked.<br />

monoslabs Standard heavy concrete castings set into<br />

ground to form large grid, seeded with grass, in unpaved<br />

regions of airfield subjected to severe jet erosion.<br />

monospar Wing construction based on single spar,<br />

strong in bending and torsion.<br />

monostatic radar Radio whose transmitter and receiver<br />

are co-located.<br />

Monroe effect Formation of hot high-velocity jet by<br />

explosion of shaped charge.<br />

monsoon 1 Winds which reverse direction seasonally,<br />

blowing seaward in winter.<br />

2 In India, seasonal rains.<br />

Monte Carlo method Computation based on computerized<br />

random sampling.<br />

Montgolfière Common term for early (pre-c1850) hotair<br />

balloons.<br />

Montreal Protocol Mandatory regulations for civil<br />

aircraft, especially safety and environment (ICAO).<br />

MON25 Mixed oxides of nitrogen comprising 25 per<br />

cent nitric oxide (the remainder the tetroxide NTO.<br />

mooring area Water reserved for mooring of marine<br />

aircraft.<br />

mooring band Reinforces upper part of envelope in line<br />

with mooring lines.<br />

mooring drag See trail rope.<br />

mooring guy Rope or cable for securing aerostat.<br />

mooring line See mooring guy.<br />

mooring mast Rigid or cable-braced high mast to which<br />

airship can be fastened and up/down which all supplies<br />

and people can pass; also called mooring tower, but<br />

purists reserve this term for a large and elaborate structure<br />

with lift[s], for mooring giant rigids.<br />

Moose Manned oribital-operations safety equipment.<br />

MOOTW Military operations other than war.<br />

MOP 1 Ministry of public works (Spanish-speaking<br />

countries).<br />

2 Magnetic orange pipe.<br />

3 Modulation on pulse.<br />

4 Minimum operational performance; see * RS.<br />

5 Massive ordnance penetrator.<br />

6 See next.<br />

MOP costs Maintenance and overhaul personnel costs.<br />

Mopitt Measures of pollution in the troposphere.<br />

MOPRS Minimum operational performance requirements<br />

standards.<br />

Mops, MOPS 1 Minimum operational performance<br />

standard[s].<br />

2 Million operations per second.<br />

Moptar Multiple-object phase tracking and ranging;<br />

short-baseline CW phase-comparison.<br />

MOQA Maintenance operations Quality Assurance.<br />

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