1Dk4eXg

mesh wiring
mesh wiring Network inserted to prevent gasbags
chafing against structure of rigid airship.
mesocline Lower layer of mesosphere (1) where temperature
rises to about 10°C at c60 km.
mesodecline Upper layer of mesosphere (1) where
temperature falls to about –90°C at mesopause.
mesometeorology 1 Meteorology on scale between
macro and micro.
2 Meteorology of mesosphere (1).
mesomorphic states See liquid crystal.
meson Family of elementary particles with energy
135–550 MeV and zero spin (possibly nine types, and
corresponding anti-particles, but some may be resonances).
mesopause Boundary between top of mesosphere (1)
and thermosphere, 80–85 km.
mesopeak Temperature at mesocline/mesodecline
boundary.
mesosphere 1 Thermal region of atmosphere between
stratopause (c30 km) and mesopause (Chapman gives
lower limit as 32 km).
2 Rarely, according to Wares, region between top of
ionosphere (c400 km and supposed bottom of exosphere
(500–1,000 km).
message pick up Lowering hinged arm to clutch written
message (RAF 1927–40).
Messir Computerized AFTN message-switching system
(F).
Met, MET 1 Meteorology, meteorological.
2 Meteorological Office.
3 Meteorological service, or broadcast service.
4 Mission-event timer.
5 Multi-image exploitation tool.
6 Mission-essential task[s] (USAF).
Metag, METAG Meteorological Advisory Group
(ICAO).
metacentre Intersection of line of buoyancy (of marine
aircraft) and axis of symmetry.
metacentric height Vertical distance from metacentre to
c.g.
metal Slang for [usually historic] aircraft, especially
airliner or warbird.
Metalastik Patented family of metal/rubber bonded
devices, mainly anti-vibration.
metal deactivator Hydrocarbon fuel additive to reduce
possibility of electrochemical action in tank or system,
esp. catalytic effect of copper on fuel oxidation.
metal-injection moulding Working material is mix of
metal and plastic binder.
metallic fuel additive 1 Various blends of high-energy
(so-called “zip”) turbine fuel incorporated boranes and
metallic compounds.
2 Most high-energy solid rocket fuels incorporate finely
divided aluminium powder.
metallics See metal matrix composite.
metallization Vacuum deposition of metal conductive
paths in planar IC or other solid-state device. See next.
metallizing Vast range of techniques involve coating
with metal, usually by plasma-spraying with finely
divided metal particles; typical example is electrical
bonding of modern airframe, in which most major parts
are isolated by non-conductive corrosion protection.
metal matrix composite Various structural or refractory
composites consist of a metal matrix, the most common
metrics
being aluminium, magnesium, titanium and copper,
reinforced by continuous fibres or whiskers of silicon
carbide or graphite.
metamic Cermet (suggest undesirable).
Metar, METAR Meteorological aeronautical radio
code for routine reports.
metastable Pseudo-equilibrium [e.g. supersaturated
solution or supercooled liquid] needing small external
disturbance to trigger violent change.
Metdial Privately run telephone met. service (UK).
Méléo-France Meteorological service (Toulouse, F).
meteor Small solid body in free fall through Earth’s
atmosphere; also called *-oid.
meteor bumper Thin shield designed to protect spacecraft
from penetration by meteors.
meteor burst communication OTH radio technique in
which short-burst signals are scattered by ionised trails
left by meteors.
meteorite Meteor large enough to strike Earth’s surface.
meteorograph Instrument for measuring and recording
two or more meteorological measures, eg T, pressure,
humidity.
meteorological rocket Ballistic vehicle to loft payload to
great height, there to free-fall or descend by ballute or
parachute.
meteorological satellite One designed to assist understanding
of atmosphere and preparation/dissemination of
actuals or forecasts.
meteorological wind Forecast wind.
meteorology Science of Earth’s atmosphere (abb. met.).
metering Control of flow, e.g. of air traffic entering
terminal airspace.
metering orifice Calibrated nozzle or tube passing
exactly known flow at given pressure difference.
MetFAX Fax-accessed weather service (UK Met.
Office).
methane Simplest hydrocarbon fuel CH 4 ; gas at NTP
but cryogenic liquid.
methanol Methyl alcohol, CH 3 OH, BPt 64.6C, S.G.
0.81, used in special blends of fuel for racing piston engine
and as additive to water as anti-knock power boost fluid.
method of least work Formula for analysis of statically
indeterminate structures.
ME3 Refractory sintered nickel-based disc alloy.
methyl alcohol See methanol.
methyl bromide CH 3 Br, common filling for hand (and
some other) fire extinguishers.
methyl cellosolve Trade name for various strippers, esp.
methylene chloride, CH 2 Cl 2 .
METI Ministry of Economy, Trade and Industry
[translation] (J).
Meto Maximum except takeoff power.
Metoc Meteorological and oceanographic (ASW).
Metplan A privately operated aviation weather service.
METPS Meteorological data processing system.
METR Multiple-emitter targeting receiver.
metre Fundamental SI unit of length, abb. m,
1,650,763.73 wavelengths in vacuum of radiation from
transition 2p 10 and 5d 5 of Kr-86 atom.
Metrep Meteorological report.
metric Usually means MKS; aerospace is gradually
standardizing on SI units.
metrics Measurements, esp. of performance and other
412