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Batco
Batco The British Air Traffic Controllers’ Association
(UK, 1961–).
BATDU Blind-Approach Training and Development
Unit (UK became WIDU).
Bates Battlefield artillery target-engagement system,
UAV-integrated (UK).
BATF Beam Approach Training Flight (RAF).
bathtub 1 Bath-shaped structure of heavy plate or
armour surrounding lower part of cockpit or other vital
area in ground-attack aircraft.
2 Temporary severe recession in production in manufacturing
plant or programme, or between programmes;
named from appearance on graphical plot (US, colloq.).
3 Graphical plot of equipment’s service life: burn-in,
useful life, wearout.
bathtub fitting Fishplate (US).
bathythermograph Sonobuoy dropped ahead of others
to measure water data at various depths.
Batmav Battlefield air tactical micro air vehicle.
BATOA British Air Taxi Operators’ Association.
batonet Tubular or rod-like toggle forming link between
rigging line and band on fabric aerostat envelope.
BATR Bullets at target range (shows location in HUD).
BATS 1 Ballistic aerial target system.
2 Bathymetric and topographic survey.
batsman Member of crew of aircraft carrier [rarely,
other landing place] charged with guiding landing aircraft
by hand signals.
batt 1 Ceramic filler formed from chopped-strand mat.
2 Battery.
batten 1 Wood or metal strip used in interlinked pairs as
ground control lock.
2 Wood or metal strips arranged radially from nose of
non-rigid airship to stiffen fabric against dynamic
pressure, or, where applicable, mooring loads.
3 Flexible strips used in lofting drawing.
battery Enclosed device for converting chemical energy
to electricity. Most aerospace batteries are secondary
(rechargeable), principal families being Ni/Cd (nickel,
cadmium), Ag/Zn (silver, zinc) and lead/acid. Fuel cells
are batteries continuously fed with reactants.
battery booster Starting coil.
battle climb A climb to near ceiling [c 16,000 ft] in the
shortest time, routine training for the RAF and other air
forces prior to WW2.
battle damage In-flight damage caused directly by
enemy (not, eg, by collision with friendly aircraft).
battlefield air interdiction Air/ground sortie(s) tasked
with restricting enemy’s tactical movement and
preventing him bringing up reserves to reinforce battle in
progress.
battle formation Any of several formations characterised
by open spacing and flexible interpretation.
battleship model Any model or rig used for repeated
development testing, usually statically, in which major
elements not themselves under test are made quickly and
cheaply from ‘boilerplate’ material to withstand repeated
use. Thus battleship tank.
battleship tank Tank for liquid propellant for static
testing of rocket engines having same capacity and serving
same feed system as in flight vehicle but made of heavy
steel or other cheap and robust material for repeated
outdoor use.
BBL
battlespace 1 Earth atmosphere and near space, region
of human conflict.
2 3-d space in which actual conflict is taking place.
bat turn Maximum-rate turn in air combat (colloq.).
bat wing Becoming common term for BWB projects.
BAUA Business Aircraft Users’ Association [1961–;
office, Farnborough GU14 6XA, merged 2004 into
BBGA] (UK).
BAUAG British Airports Users’ Action Group.
baud Unit of telegraphic signalling speed, equivalent to
shortest signalling pulse or code element. Thus speed of 7
pulses per second is 7 bauds (pronounced ‘boards’);
abbreviation Bd.
baulk 1 Aborted landing due to occurrence in final
stages of approach (typical causes would be aircraft on
airfield taxiing on to runway or a runaway stick-pusher in
landing aircraft).
2 Verb, to obstruct landing of an approaching aircraft
and cause it to overshoot.
3 Physical limiter on available movement of an
inceptor, e.g. to prevent inadvertent operation of landing
gear or reverser.
baulked landing See baulk (1).
Baumé Density scale of petroleum products; for S.G.
less than 1, °B = ––––
140
–1.
S.G.
BAWS Biological aerosol, or agent, warning system, or
sensor.
bay 1 In aerodyne fuselage or rigid airship hull, portion
between two major transverse members such as frames or
bulkheads.
2 In biplane or triplane, portion of wings between each
set of interplane struts; thus, single-* aircraft has but one
set of interplane struts on each side of centreline.
3 In any aircraft or spacecraft, volume set aside for
enclosing something (eg, engine *, undercarriage *,
bomb *, cargo *, lunar rock *).
bayonet Electronic subsystem permitting radar of strike
aircraft to home on designated ground target and
providing azimuth for release of weapons equipped with
radiation sensors.
bayonet exhaust Formerly, form of piston engine
exhaust stack designed to reduce noise.
BAZ 1 Bundesamt für Zivilluftfahrt Zentrale (Austria).
2 Back azimuth unit, MLS addition used for departure
and overshoots.
BAZL Bundesamt für Zivilluftfahrt, Federal office for
civil aviation (Switzerland).
BB 1 Back bearing.
2 Battleship (USN).
3 Bulletin board [S adds system] (US).
4 Base band.
BBAC British Balloon and Airship Club. [1965–; office,
Bedminster BS3 4NH] (UK).
BBAL Association of smaller GA companies [D-53757
St Augustin] (G).
BBC 1 Broad-band chaff.
2 Before bottom centre.
BBGA British Business and General Aviation
Association [formed 2004 by merger of BAUA and
Gamta; office Aylesbury HP18 9RT] (UK).
BBHS Battle of Britain Historical Society.
BBI Bit bus interface.
BBL 1 Billion barrels liquid.
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