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pickoff sensitivity
pickoff sensitivity Usually signal voltage per unit
angular travel.
pickup A fault or omission noticed and corrected later.
PICL, Picl Pool-item candidate list.
pico Prefix, × 10 –12 ; hence one picosecond (1 ps) is one
millionth of one millionth of a second.
picocell Small radio tower on passenger aircraft to
instruct handsets to communicate with it exclusively and
at lowest power.
picosatellite Mass 0.5 lb, 0.2268 kg.
picric acid Trinitrophenol.
Pics, PICS 1 Photogrammetric integrated control
system.
2 Protocol implementation conformance statement[s].
picture manoeuvre Manoeuvre made by large aerobatic
team involving wide separation of aircraft to fill large part
of display area, eg bomb-burst.
Picus Pilot in command under supervision.
PID 1 Program introduction document (DoD).
2 Passive identification device.
3 Photo-ionization detector, or detection.
4 Post-impact delay.
5 Portable intruder detector.
6 Parameter, process or primitive identifier.
7 Passenger-information display.
8 Proton-induced damage.
PIDP Programmable indicator data-processor
(USAF).
PIDS, Pids 1 Prime-item development specification.
2 Pylon integrated dispenser system.
3 Positive identification system.
4 Perimeter, or portable, intrusion detection system.
piece of cake A task posing no problems (RAF colloq.,
WW2).
pier Long corridor, usually two-level, connecting
airport terminal with gates.
pierce To cut part from sheet; hence large family of
presswork dies such as * and cut off, * and form, * and
trim.
pierced-steel planking Standard (mainly WW2 to 1950)
unit of prefabricated airfield surface; mild steel plates
measuring 119.75 in × 16 in and weighing 65 lb (29.5 kg)
with interlocking edges.
pie-shaped NLG steering, or other, inceptor having
shape of segment of disc.
pièze Non-Si unit of pressure used in French legal
system = 1 sn/m 2 = 1 kN/m 2 = 1kPA = 0.14503 lb/in 2 .
piezeoelectric Relationship exhibited by certain
crystalline substances, esp. single crystals, between
electric potential difference and mechanical stress; eg
applying voltage (DC or AC) across opposite faces results
in expansion/ contraction or vibration, while applying
stress or vibration results in potential difference. Purists
divide sensors into: piezoelectric, in which the output is
generated by the stress; and piezoresistance, in which the
stress changes the resistance sensed by an applied current.
PIF 1 Photo-interpretation facility.
2 Pilot’s Information File (US, WW2).
3 Pilotage in force [control by thrusters or thrustvectoring].
pif/paf Missile control system combining lateral
thrusters at c.g. [pif] with aerodynamic surfaces [paf].
Pifet Piezoelectric field-effect transistor.
PIG, Pig 1 Pendulous integrating gyro.
pilot-interpreted system
2 Pilot’s Information Guide.
Piga PIG accelerometer.
Pigeon, pigeons Air-intercept code: “Your base bears X o
and is Y miles away”.
piggyback Composite aircraft, or aircraft carrying large
vehicle superimposed.
Pigma Pressurized-inert-gas metal arc.
pigtail 1 Projecting rigid pipe, usually with 90° bend and
threaded connection for attachment to fluid system.
2 Short length of any other kind of cable or transmission
line projecting from device for attachment to
system.
PIHM Protective integrated hood mask.
pillow tank Dracone or similar flexible fluid storage.
Pilot 1 Piloted low-speed test (ambiguous).
2 Pod integrated localization, observation, transmission.
pilot Person designated as *. Previous definitions
involved operation of particular controls (in one case
‘mechanisms’) or guidance of aircraft in 3-D flight, none
of which need be done in advanced aircraft, though *
required to monitor. In case of RPV * may be in other
aircraft or on ground. For command-guided missiles
preferred term is operator.
pilotage Contact flying, navigating by visible surface
landmarks.
pilot assister Qualified pilot in right-hand seat of aircraft
training navigators or other crew members [generally =
copilot].
pilot balloon Meteorological balloon; alternatively,
small free balloon devoid of instrumentation, observation
of which from ground enables wind at different heights to
be caclulated.
pilot canopy Small auxiliary canopy, ejection of
which pulls out main canopy (personal, cargo and braking
parachutes).
pilot case Original term for capacious briefcase for
pilot’s documents, headset, etc.
pilot certificate In many countries, title of document
licensing pilot according to five to 11 categories. In UK
and many other countries called licence.
pilot chute Pilot canopy.
pilot control bay Location of flight trajectory and navigation
interface in UAV GCS.
pilot deviation Pilot action that violates FARs.
piloted Supervised by human beings, usually on board,
playing active and direct role in control of vehicle.
pilot flying In multi-crew operation, pilot actually flying
the aircraft, also called handling pilot.
pilot hole Small but precisely located hole serving as
guide to subsequent larger drilling.
pilot in command Person responsible for aircraft in
flight.
pilot induced oscillations Potentially dangerous or even
catastrophic pitch oscillations caused by pilot trying to
stop them. Cause may be oversensitive system with very
light input forces, or restricted hydraulic flow rates in
PFCUs so that pilot is always making late corrections
with ever-greater magnitude.
pilot-interpreted system One, eg early AI radar,
requiring skill and judgement on part of operator, in
contrast to modern digital readout and unambiguous
indications. Note: early systems were often interpreted by
other members of crew but no term exists.
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