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control the operation, which is automatic

Automatic flight control system
capable of landing an aircraft hands
off.
hangar hangar /hŋə/ noun a large shelter
for housing and maintaining aircraft

Light aircraft should be left with parking
brakes off so that they can be moved
quickly in the event of a fire in the
hangar.
hard landing hard landing /hɑd lndŋ/ noun
an uncontrolled landing by an aircraft
that results in its being damaged or
destroyed
HASELL HASELL  mnemonic
haul haul /hɔl/ noun  long-haul, shorthaul
hazard hazard /hzəd/ noun a possible danger

Thunderclouds are of special
interest to aircrew because of the hazards
they may pose to aircraft in flight.
hazardous 110
hazardous hazardous /hzədəs/ adjective possibly
risky or dangerous
Flying over
mountainous terrain can be hazardous.

Structural icing is a hazardous phenomenon
for rotary wing as well as
fixed wing aircraft.
haze haze /hez/ noun dust or smoke in the
atmosphere
Haze can seriously
reduce air-to-ground visibility.
head head /hed/ noun 1. the top part of the
body above the shoulders 2. a person 
head count an easy way of counting
large numbers of people 3. a main end
part or top of something 4. a leader,
chief or director  head of department
the most senior person in the department
 verb to fly in a particular direction
 head north to fly towards the
north
heading heading /hedŋ/ noun the direction
in which the longitudinal axis of the aircraft
is pointing, expressed in degrees
from north
COMMENT: Wind affects an aircraft in
flight, therefore heading does not
always coincide with the aircraft’s
track. The pilot must head the aircraft
slightly into the wind to correct for drift.
heading bug heading bug /hedŋ b$/ noun a
movable plastic marker on the horizontal
situation indicator
heading correction heading correction /hedŋ kə|
rekʃ(ə)n/ noun a change of heading in
order to deal with a new situation. Also
called course correction
heading indicator heading indicator /hedŋ
ndketə/ noun an instrument which
gives course or direction information
e.g. a horizontal situation indicator
(HSI) or direction indicator (DI)
COMMENT: The heading indicator is
driven by a gyro and provides steady,
exact indications of heading.
heading to steer heading to steer /hedŋ tə stə/
noun a gyro-compass point in which to
direct the aircraft
head-on head-on /hed ɒn/ adjective, adverb
 to approach head-on to approach
from opposite directions
head-on collision head-on collision /hed ɒn kə|
l"(ə)n/ noun a collision between two
things or vehicles coming from opposite
directions
headphones headphones /hedfəυnz/ noun
small speakers with padding, worn over
a person’s ears, used for private listening

Headphones are used to monitor
the signal.
headset headset /hedset/ noun headphones
with a microphone attached, used for
RT communications
Headsets are
usually used in preference to hand-held
microphones.
head-up display head-up display noun a cockpit system
where data from flight instruments
is projected onto a screen or the windscreen
so that the pilot can see it without
having to look down. Abbreviation
HUD
headwind headwind /hedwnd/ noun a wind
which is blowing in the opposite direction
to the direction of movement or
flight. Compare tailwind (NOTE: The
word is also written head wind.)
headwind component headwind component /hedwnd
kəm|pəυnənt/ noun one of the three
possible components of a wind, the
other two being crosswind and tailwind
heap heap /hip/ noun a group of things
piled or thrown one on top of another
heap cloud heap cloud /hip klaυd/ noun same
as cumulus cloud
heat heat /hit/ noun warmth, being hot

The heat generated by combustion is
considerable.  verb to make warm or
warmer
The air leaving the turbocharger
is very warm and can be used to
heat the cabin.
heater heater /hitə/ noun a device for heating

Pitot heads contain heater elements
to prevent icing.
heating heating /hitŋ/ noun the process of
making something warmer
the heating
action of the sun
kinetic
　
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本文鏈接地址：Dictionary of Aviation上(102)