1Dk4eXg

tail rotor
zontal tail, to increase system capacity and, esp., to
control longitudinal trim without drag.
tail rotor Helicopter anti-torque rotor, rotating at tail
about more or less horizontal axis. Not used for rear
tandem rotor.
tailscrape See tailstrike.
tail setting angle The acute angle between chord lines of
wing and tailplane (1).
tailsitter VTOL aerodyne whose fuselage is approximately
perpendicular at takeoff, in hovering mode and at
landing, today preferably called Vatol.
tailskid Projection, usually a sprung lever with endshoe,
supporting tail of aerodyne on ground, esp. one
whose c.g. is well aft of main landing gear.
tailskid shoe Replaceable pad on end of tailskid which
slides on ground.
tailslide Transient flight condition of fixed-wing aerodyne
in which relative wind is from astern, eg in stall from
near-vertical climbing attitude.
tailspin Spin (arch.).
tailstander Tailsitter.
tailstrike Scraping rear fuselage on runway on rotation.
Hence, * indicator, frangible foil which causes a bright
flash on EICAS.
tailstrike protection Any of several systems which
prevent a tailstrike, usually by limiting authority of horizontal
tail.
tail surface Any aerofoil forming part of tail (2).
tail turret Defensive gun turret, usually power-driven,
forming the tail end of the fuselage, today becoming rare.
tail undercarriage Rearmost unit of tailwheel-type
landing gear (rare, suggest arch.).
tail unit Complete tail (2) of horizontal, vertical and/or
canted surfaces, often including ventral fins or strakes.
Also called empennage.
tail-up procedure Final closure of production at end of
need for spares or support.
tail view Tail-on view showing object from directly
astern; not normal aspect for layout drawing.
tail volume See V¯¯.
tailwagging 1 Lateral flexure of fuselage.
2 Flat turns, esp. to steepen glide.
tail warning radar Aft-facing radar, usually of active
type, intended to detect other aircraft (and possibly
SAMs) intercepting from behind.
tailwheel 1 Rear wheel of * type landing gear, supporting
tail on ground.
2 Auxiliary wheel under tail of aircraft with nosewheeltype
landing gear (eg Albemarle); fitted in place of tail
bumper.
tailwheel landing gear Landing gear comprising
left/right main units ahead of c.g. and tailwheel at rear.
tailwind Wind blowing approximately from astern of
aircraft and thus increasing groundspeed.
TAIMS Three-axis inertial measurement system.
TAINS, Tains Tercom and, or Tercom-aided, inertial
navigation system.
TAIR Terminal-area instrumentation radar.
TAIRCW Tactical air control wing.
TAIS 1 Tactical air intelligence systems.
2 Technology application information system (SDI).
3 Tactical airspace integration system.
4 Thermal active intervention system.
Take 5 Traffic crossing airway must maintain
takeoff thrust
prescribed separation of 5 nm horizontally and 5,000 ft
vertically from any GAT track in airway.
takeoff 1 Procedure in which aerodyne becomes
airborne; not normally used for launch of glider (except
on aerotow) or high-acceleration launch of missile or
RPV, and never for any ballistic vertical-liftoff vehicle. In
author’s opinion verb is best as two words, noun and
adjective as single word without hyphen.
2 Moment or place at which aerodyne leaves ground or
water.
3 Net flightpath from brakes-release to screen height.
4 Power * for extraction of shaft power.
take off To perform a takeoff.
takeoff boost Boost pressure permitted for takeoff,
usually 2 minute limit.
takeoff cone Airspace occupied by aircraft in first
minutes of flight.
takeoff distance, TOD Field length measured from
brake-release to reference zero (at screen); can be longer
than runway and extreme limit TOD a = entire runway +
stopway + clearway = TOR a × 1.5. For multi-engine aeroplanes
usually factored according to number of operative
engines, thus TOD 4 or TOD 3 . TOD 1 = TOD required for
particular aircraft and WAT, not normally to exceed 0.87
TOD a .
takeoff distance available Actual distance at particular
time, not necessarily length of runway.
takeoff distance ratio TOD into wind divided by TOD
downwind [with tailwind], usually expressed as
percentage.
takeoff/liftoff area Heliport area, a square with side
equal to main-rotor diameter (FAA).
takeoff limit No general meaning.
takeoff mass Not normal term; for rocket or space
launcher usually liftoff mass or launch mass.
takeoff noise Measured on extended runway centreline
3.5 nm (strictly 6,485.5 m, but taken as 6.5 km) from
brakes-release. A second reference point, not used for
certification, is at side or runway opposite supposed start
of run 1 nm from centreline.
takeoff power Power authorized for piston engine or
turboprop for takeoff, usually 2½-minute rating for
turbine engines. In case of turboshaft, a lower rating than
2½-minute contingency.
takeoff rating 1 Boost/manifold pressure/rpm figures
authorized for piston engine at takeoff.
2 Thrust published for turbojet or turbofan at takeoff,
normally achieved by engine control system rather than
set directly by pilot, and subject to ATR or FTO techniques.
takeoff rocket See rocket-assisted takeoff.
takeoff run 1 Loosely, distance travelled over land or
water in aeroplane or aerotow-glider takeoff to point of
becoming airborne.
2 TOR, field length measured from brake-release to end
of ground run plus one-third of airborne distance to
screen height. TOR a = TOR available = length of runway;
TOR 4 , TOR 3 are factored for engine-out cases, and TOR r
= TOR required.
takeoff safety speed V 2 , lowest speed at which aeroplane
complies with required handling criteria for climb-out
following engine failure at takeoff.
takeoff speed Not defined but loosely = unstick speed.
takeoff thrust Takeoff rating (2).
681