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harness
controls about each axis matches that about others at all
airspeeds; in particular so that handling about each axis
in terms of rate of pitch, roll or yaw, and load (real or
synthetic) experienced by pilot appear to be in harmony.
harness 1 Assembly of straps with which member of
flight crew can be secured to seat.
2 Assembly of straps with which parachutist can be
attached to parachute, which may or may not be permanently
attached to *.
3 System of straps and other restraining members with
which cargo pallet or container is secured to cargo floor
in cases where there is no inbuilt anchorage. Not restraint
net.
4 Weatherproof, screened assembly of HT leads
connecting ignition source to piston engine plugs or gasturbine
igniters.
harness secure The mandatory procedure of assembling
and pinning the harness in an empty pilot seat when a dual
aircraft is being flown solo [to prevent it fouling the
control column].
HARP, Harp 1 Helicopter Airworthiness Review Panel.
2 Helicopter advanced rotor program.
3 High-altitude research program.
Harper rivet Extremely shallow convex head.
harpoon system Any helicopter hold-down system based
on firing barbed anchor into grid or other fixed base on
ship platform.
Harris program Numerical factors used in designing
aircraft to the area rule for minimum wave drag (NASA).
Harry Clampers Clamp (colloq.).
HARS, Hars 1 Heading/attitude reference system.
2 High-altitude route system.
harsh environment recorder Tape recorder with up to 28
tracks meeting most severe specification for temperature,
vibration/shock and sustained acceleration.
hartley Standard unit of information content generally
taken as equal to log 2 10 = 3.219 bits or 1 decimal digit.
Hartmann generator Common electrically powered
source of intense noise, usually with variable spectrum.
Hartridge smoke unit, HSU One of most popular
measures of smoke blackness; smoke is fed through
chamber of known length and light meter measures light
received from calibrated source at other end. Accurate for
combustion engineers but for subjective assessment
against sky jet diameter must be taken into account. PSU
is similar (see smoke).
HARVe Pronounced harvey, high-altitude reconnaissance
vehicle (JHU/APL).
HAS 1 Hardened aircraft shelter.
2 Hover-augmentation system (reduced pilot workload
by using sensitive accelerometers in hover).
3 Hood, aircrew survival.
4 Helicopter anti-submarine (UK).
5 Heading and attitude (reference) system (or
heading/attitude sensors).
6 Hazard awareness system.
7 Helicopter air and surface [targets].
HASA Helicopter Association of Southern Africa.
HASC House Armed Services Committee (US).
Hasell check Height, airframe, security, engine(s), location,
lookout; prior to spin or other harsh manoeuvre.
HASG Helicopter Airworthiness Study Group (CAA).
HASI Huygens atmospheric-structure instrument.
Hasp High-altitude sampling program.
HB
Hass, HASS Highly accelerated stress screening.
HAST High-altitude supersonic target.
Haste Helicopter ambulance service to emergencies
(US).
Hastelloy Family of US Ni-Cr-Mo-Fe alloys combining
strength at high temperatures with resistance to oxidation
or corrosion.
HAT 1 Height above touchdown (or threshold) (FAA).
2 Harbour acceptance trial(s) (Missile).
3 Hierarchical axis, or axes, technique.
4 High-power amplifier transmitter.
Hat On a navex, or en route, noting heading / altitude /
time at each turning point (GA1).
hat 1 Section commonly used for stiffeners and other
structural members, formerly called top-hat and resembling
latter’s outline.
2 Coolie *, flat cone multiway thumb switch on top of
stick, usually controlling trim and radar elevation angle.
hatchback Transport whose rear cabin area is Combi.
HATM Hypervelocity anti-tank missile.
HATOD Hill airtasking order defragger.
Hatol Horizontal-attitude takeoff and landing.
HATR 1 High-temperature attenuated total reflectance.
2 Hazardous air traffic report(ing).
HATS 1 Helicopter automatic targeting system.
2 Heavy Aircraft Test Squadron (UK, WW2).
hatted Appointed as a military commander (US
colloq.).
Have Permanent first word in code names of AFSC
projects (USAF).
have numbers Radio code: “I have received and understood
wind and runway information for my inbound
flight”.
HAW 1 Hypersonic aerodynamic weapon.
2 Hawaii space tracking station.
HAWC Homing and warning computer.
Hawfcar Helicopter adverse-weather fire-control acquisition
radar.
Hawk Homing all the way killer.
hawking the deck To fly closely past carrier on right
(starboard) side to check deck state before landing on.
Hawtads Helicopter all-weather target-acquisition and
destruction system.
Haybox Helicopter jetpipe incorporating IRCM
(colloq.).
hazard alert Broadcast to all affected operators of
existing or impending failure in hardware of nature likely
to imperil safety of flight, usually as result of fault discovered
on inspection; fault can be structural or in system
operation, but invariably affects part of aircraft.
hazard beacon Warns of permanent danger to air navigation.
hazard levels Aircraft manuals identify three: Note, a
mere reminder of possible hazard; Caution, advice of
possible damage to human or hardware; Warning,
ignoring which could be lethal (FAA).
hazardous A particular aerospace meaning is: likely to
threaten the continuation of safe flight.
Hazcam Hazard [on planetary surface] camera.
haze Mist caused by water borne by particulate matter
in unsaturated air.
hazmat Hazardous material[s].
HB 1 Brinell hardness.
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