61,984 articles
Pipistrel
Pipistrel is a Slovenian light aircraft manufacturer based in Ajdovščina, founded by Ivo Boscarol in 1989 as the first private aircraft producer in the Balkans, owned by Textron since 2022.
Pipistrel Sinus
The Pipistrel Sinus is a Slovenian two-seat, side-by-side motorglider produced by Pipistrel in Ajdovščina, first flown in 1996, with a 15-meter wingspan and a glide ratio up to 28:1.
Pipistrel Velis Electro
The Pipistrel Velis Electro is a two-seat electric training aircraft built in Slovenia, the first fully electric aircraft type certified worldwide, by EASA in June 2020.
Piracy in the Seto Inland Sea
Piracy in the Seto Inland Sea, known in Japanese as kaizoku (海賊), was maritime power over Japan's Inland Sea from the tenth to the late sixteenth century.
Piranha Bytes
Piranha Bytes was a German video game developer in Essen, best known for the open-world RPG series Gothic, Risen, and Elex; it closed in 2024.
Pirate code
The pirate code (pirate articles, chasse-partie) was a set of written articles pirate crews swore or signed, governing the ship, dividing plunder, and punishing offenses, from the 1678 buccaneer contracts onward.
Pirelli
Pirelli (Pirelli & C. S.p.A.) is an Italian tire manufacturer founded in 1872 and headquartered in Milan, the sole supplier of Formula One tires since 2011.
PIREP
A PIREP, or pilot report, is a real-time report by an aircraft pilot of in-flight weather conditions such as turbulence and icing, radioed to a ground station in a coded format.
Pirogue
A pirogue is a long, narrow boat, originally a dugout canoe hollowed from a single tree trunk, used in the Caribbean, the Americas, West Africa, and Oceania.
Pisa Cathedral
Pisa Cathedral (Cattedrale di Santa Maria Assunta, or Duomo di Pisa) is the medieval Romanesque cathedral of Pisa, Tuscany, founded in 1063 and consecrated in 1118.
Pistol
A pistol is a firearm designed to be held and fired with one hand, with its chamber fixed to or aligned with the barrel, distinct legally from a revolver.
Pistol-whipping
Pistol-whipping is the use of a handgun as a blunt weapon, striking a victim with the grip, butt, or muzzle end of the firearm rather than firing it.
Piston
A piston is a reciprocating machine element that slides in a cylinder, transmitting combustion pressure through the connecting rod while piston rings seal the working space.
Piston effect
The piston effect is the airflow a moving train forces through a railway tunnel, pushing air ahead of it and drawing air behind; it ventilates subway stations without fans.
Piston pump
A piston pump is a positive-displacement pump in which a reciprocating piston draws fluid in through an inlet valve and forces it out through an outlet valve.
Piston ring
A piston ring, or packing ring, is a split metal ring on an engine piston that seals gas, controls oil, and conducts heat to the cylinder.
PIT maneuver
The PIT maneuver, or precision immobilization technique, is a police pursuit tactic in which a pursuing vehicle strikes a fleeing car's rear corner to spin it to a stop.
Pit thermal energy storage
A pit thermal energy storage (PTES) is a large excavated water reservoir lined with polymer and covered with an insulating lid, storing heat for district heating networks across seasons.
Pit-house
A pit-house is a dwelling whose floor is excavated below the ground surface, common in the ancient American Southwest from about 200 BC to AD 700.
Pitcairn PCA-2
The Pitcairn PCA-2, or Pitcairn-Cierva PCA-2, was an American autogiro first flown in 1930 and the first rotary-wing aircraft certified for commercial use in the United States.
Pitch (ship motion)
Pitch is the rotational oscillation of a ship about its transverse axis, one of six degrees of freedom, governing seakeeping in head seas and slamming.
Pith helmet
The pith helmet, also known as the sola topi or sun helmet, is a lightweight sun helmet with a rounded dome and wide brim, developed in the 19th century.
Pitney Bowes
Pitney Bowes, founded in 1920, is an American company best known as maker of the first commercially used postage meter, now providing shipping and mailing technology.
Pitot tube
A Pitot tube, also called a Pitot probe, is a slender pressure-sensing probe that measures fluid flow velocity from the difference between total and static pressure, used on aircraft and in pipes.
Pitt Stadium
Pitt Stadium was the on-campus football stadium of the University of Pittsburgh, home to the Pitt Panthers from 1925 until its demolition after the 1999 season.
Pitting corrosion
Pitting corrosion is a localized form of corrosion in which small cavities form in a metal's surface when its protective passive film breaks down, often from chlorides.
Pittler
Pittler is a German machine tool name founded as Maschinenfabrik Wilhelm von Pittler in Leipzig in 1889, known for the 1910 gear skiving patent and Pittler T&S turning machines.
Pitts Special
The Pitts Special is a family of small aerobatic biplanes designed by Curtis Pitts, first flown in the mid-1940s and built by amateurs from plans since 1962.
Pittsburgh International Airport
Pittsburgh International Airport (PIT) is the commercial airport serving Pittsburgh, Pennsylvania, opened in 1952 as Greater Pittsburgh Airport and rebuilt around a midfield terminal in 1992.
Pittsburgh Light Rail
The Pittsburgh Light Rail, branded the T, is a 26-mile light rail system serving Pittsburgh and its southern suburbs, run by Pittsburgh Regional Transit on the Red, Blue, and Silver lines.