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FIPS
2 False-image projection, test of operator alertness.
3 Full intermediate power.
4 Failure-injection panel.
5 Flight Information Publication (UK).
FIPS Flight-information processing system.
FIR, Fir 1 Flight Information Region.
2 Finite impulsive response.
3 Flight-incident recorder.
4 Full indicator reading.
Firams, FIRAMS Flight-incident recorder and monitor
system.
FIRC Flight-instructor refresher clinic.
Fire Flammes infra-rouge embarquées, IR payloads
(F).
fire 1 To ignite rocket engine; start of main-chamber
burn.
2 To launch rocket.
fire access door Hinged flap, usually spring-loaded,
through which fire extinguisher can be aimed when a/c
parked.
fire-and-forget missile One with IR seeker or other selfhoming
capability.
fire axe Carried to enable crew to escape after crash or
belly landing while on fire, normal exits unavailable.
fireball 1 Luminous sphere formed a few millionths of a
second after detonation of nuclear weapon.
2 Meteor with luminosity which equals or exceeds that
of brightest planets.
fireblocker Furnishing fabric meeting specific requirements
as barrier to fire.
fire channel Single data highway for C 3 I, esp. of SAM
system (eg Hawk has 2, Patriot has 10).
fire classification Class A, wood, paper etc; B, petrol
(gasoline), oil, other fuels, except, C, butane, propane,
hydrogen etc.
fire-control radar One providing target-information
inputs to a weapon fire-control system.
fire-control system System including radar(s) mounted
on land, sea or air platform to provide exact data on target
position and velocity before engagement with guns,
missiles or other weapons.
fire deluge system Remotely controlled pipes, hoses and
spray outlets, situated throughout launch-pad area of
large missile or space launching site, which operate if there
is a fire or explosion in the area.
fired out Fighter which has launched all its AAMs.
fire floor Essentially horizontal floor or other sheet
designed to be fireproof [at least for significant time].
firegate In effect, the tap that, usually under computer
control, governs dispensation rate of retardant in firefighting
tanker.
firepoint Locations in main floor of [especially pressurized]
aircraft provided with visual access and light in order
to inspect underfloor area and establish cause of fire
warning.
fire point Temperature at which material will give off
vapour that will burn continuously after ignition (see
flashpoint).
fireproof Rules include ‘at least as well as steel’.
fire pulse Signal for remote control of fire (1); for fire (2)
ususally called launch pulse.
fire resistant Rules include ‘at least as well as aluminium
alloy’.
first-limit indicator
Fires 1 Firefighters’ integrated response equipment
system (USAF).
2 Fixed IR and enhance[d] survivability.
Firetex Fire-blocking material, a viscose carbonised
fabric reinforced with aramid fibres.
fire tunnel Test facility for engine bay or other device for
investigating temperatures, airflows, insulation, fuel leaks
and fire suppression, etc.
fire unit Basic subdivision of large SAM system (ie not
infantry-operated), usually with four to 12 launchers at
one location.
fire up To start engine, especially first test of new type
previously subjected only to motoring tests without
combustion.
firewall 1 Fire-resistant bulkhead designed to isolate
engine from rest of aircraft.
2 Internet or Aeronet security barrier.
Firewire Stainless-steel capillary tube containing insulator
with electric wire running down the centre. If heated
above a critical temperature a current flows, triggering
warnings and release of extinguishant (Graviner).
firing chamber Test cell for static firing of small horizontally
mounted rocket or missile.
firing console Human interface with rocket engine or
vehicle launch.
firing envelope For any given airspeed and aerial target,
the 3-D box of sky within which a fighter can launch a
guided missile and achieve interception.
firing order Sequence in which piston engine cylinders
fire, invariably 1-3-4-2 or 1-5-3-6-2-4.
firing pass Flight of combat aircraft towards air or
ground target in which weapons are fired.
firing pit Encloses rocket test stand on all sides except
nozzle.
firing test Static operation of rocket.
firing time 1 Time between application of d.c. voltage to
vacuum tube or solid-state device and start of current
flow.
2 Time between RF power and RF output in radar.
3 Burn time.
Firms Alternative to Firams.
FIRMU Flight-incident recorder memory unit.
firmware This usually means the fixed structure
supporting a moving element, such as the mountings for
a gimballed radar antenna.
First Flexible independent radar skills trainer.
first-angle projection Side and plan show nearest faces of
front elevation (US).
first-article verification Self-explanatory, confirmation
that the first production item [part of a system or functioning
device] fully meets the specification.
first buy Lockheed term for firm order.
first day First day of theoretical war, with part-loaded
aircraft making vertical liftoffs. Later, defences are worn
down, and aircraft make STOs with full weapons load.
first hop Briefly airborne during high-speed taxi test
prior to first flight.
first law of thermodynamics Statement of conservation
of energy for thermodynamic systems (not necessarily in
equilibrium); fundamental form requires that heat
absorbed serves either to raise internal energy or do
external work.
first-limit indicator Cockpit instrument giving an
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