Question: How many engines does the plane the "Texas Raiders" fly have?

Context paragraphs:
JavaScript: JavaScript ( ), often abbreviated as JS, is a high-level, dynamic, weakly typed, object-based, multi-paradigm, and interpreted programming language.  Alongside HTML and CSS, JavaScript is one of the three core technologies of World Wide Web content production.  It is used to make webpages interactive and provide online programs, including video games.  The majority of websites employ it, and all modern web browsers support it without the need for plug-ins by means of a built-in JavaScript engine.  Each of the many JavaScript engines represent a different implementation of JavaScript, all based on the ECMAScript specification, with some engines not supporting the spectrum fully, and with many engines supporting additional features beyond ECMA.

Texas Raiders: Texas Raiders is an American Boeing B-17 Flying Fortress, a Douglas-Long Beach built B-17G-95-DL.  The Commemorative Air Force’s Gulf Coast Wing "Texas Raiders" group maintains and flies the aircraft.  She is hangared at General Aviation Services, which is located at Conroe North Houston Regional Airport in Conroe, Texas.

LeRoy W. Homer Jr. Foundation: The LeRoy W. Homer Jr.  Foundation is a national 501(c)(3) non-profit organization founded in memory of First Officer LeRoy W. Homer Jr..  LeRoy Homer was the co-pilot of United Airlines Flight #93, which crashed in Shanksville, Pennsylvania on September 11, 2001.  The flight recordings revealed that Dahl and Homer survived the initial attack and were still alive after the hijackers took over the plane.  It is believed that Dahl and Homer took actions to interfere with the hijackers, including disengaging the autopilot just before the hijackers took over in order to prevent them from setting the plane's target coordinates for Washington, D.C., and switching the output of the pilots' microphones from the cabin address speakers to the radio transmitter so that Jarrah's attempts to communicate with the passengers would instead be heard by air traffic controllers.  After learning of the earlier crashes at the thumb|right|World Trade CenterMelodie and the Pentagon, the crew and passengers attempted to foil the hijacking and reclaim the aircraft.  Meanwhile, the hijackers were not able to disengage the autopilot.  Dahl continued to struggle in the cockpit, refusing to allow a hijacker to deactivate the autopilot so he could fly the plane manually.  The hijackers were heard to say "Inform them, and tell him to talk to the pilot; bring back the pilot", possibly referring toLaurel Homer (CVR transcripts).  However, the uprising of crew and passengers took place and during the attempt the plane crashed into a field in Stonycreek Township, Pennsylvania2002.  The crash killed everyone on board.  Before the plane went down, she says, he had regained consciousness and was part of the final attack that forced the plane to abort its intended target, which was somewhere in Washington, D.C., and crash.ref>]]

Westinghouse Farm Engine: The Westinghouse Farm Engine was a small, vertical-boilered steam engine built by the Westinghouse Company that emerged in the late nineteenth century.  In the transition from horses to machinery, small portable engines were hauled by horses from farm to farm to give power where it was needed.  Many small workshops used them as well.  As a side line to the airbrake products, George Westinghouse made these horse-drawn, vertical-boilered and horizontal-cylinder engines which looked like a coffee pot on wheels.  It came in 6, 10 and 15 horsepower sizes.  The engines were produced from 1886 to 1917 when they were superseded by larger, standard farm engines.  Many engines of this make were sent to South America where they were popular.

Seizō Yasunori: Sub Lieutenant Seizō Yasunori (安則 盛三 , Yasunori Seizō , died May 11, 1945) was a Japanese student who joined the Imperial Japanese Navy, and on May 11, 1945 was ordered to fly a kamikaze mission during the Battle of Okinawa near the end of World War II.  Kamikaze pilots were generally 18–20 years old, poorly trained, and flew poorly maintained aircraft.  As leader of the Navy's Kamikaze Corps 7th Showa Special Attack Squadron, he led a group of four young men to attack US Navy ships.  Yasunori led a group of six planes which departed Kanoya Air Base between 0640 and 0653 on May 11, 1945.  Yasunori dropped a 550-lb bomb and then crashed his A6M Zero into the aft portion of the flight deck of the USS "Bunker Hill" , along with his wingman, Kiyoshi Ogawa.  He and his wingman killed 393 Americans; the most devastating suicide attack in the Pacific War and wounded an additional 264.  Three-hundred fifty-two of the dead were buried at sea the next day.  The bomb tore a hole in the port side of the ship and his plane crashed onto the flight deck.  The ensuing explosion destroyed many of the planes on the deck.  His plane dragged another plane overboard.  His wingman, Kiyoshi Ogawa, crashed into the ship a few seconds later.  A third plane crashed into the sea before reaching the ship.  The fate of the remaining three planes is unknown.  His story is told in "Danger's Hour", published by Simon & Schuster on Veteran's Day, 2008.

British Airways Flight 268: British Airways Flight 268 was a regularly scheduled flight from Los Angeles LAX airport to London Heathrow LHR.  The flight took off at about 9:24 p.m. on 20 February 2005.  When the plane, a four engine Boeing 747–436, was around 300 feet into the air, flames burst out of its number 2 engine, a result of engine surge.  The pilots shut the engine down.  Air traffic control expected the plane to return to the airport and deleted the flight plan.  However, after consulting with the airline dispatcher, the pilots decided to set off on their flight plan "and get as far as we can" rather than dump 70 tonnes of fuel and land.  The 747 is certified to fly on three engines.  Having reached the East Coast, the assessment was that the plane could continue safely.  The cross-Atlantic journey encountered less favourable conditions than predicted.  Upon reaching the UK, believing there to be insufficient usable fuel to reach their destination, the captain declared an emergency and landed at Manchester Airport.

GWR 5600 Class: The GWR 5600 Class is a class of 0-6-2T steam locomotive built between 1924 and 1928.  They were designed by C.B Collett for the Great Western Railway (GWR), and were introduced into traffic in 1924.  After the 1923 grouping, Swindon inherited a large and variable collection of locomotives from historic Welsh railway companies, which did not fit into their standardisation programme.  GWR boiler inspectors arrived en masse and condemned many of the original locomotives.  The systematic destruction of many examples of locomotives, most still in serviceable condition, followed.  Of the Taff Vale Railway, many engines continued to operate up to the 1950s, but today only two locomotives survived, TVR 'O1' No.28, the last-surviving Welsh-built engine, and TVR 'O2' No.85.

Boeing B-17 Flying Fortress: The Boeing B-17 Flying Fortress is a four-engine heavy bomber developed in the 1930s for the United States Army Air Corps (USAAC).  Competing against Douglas and Martin for a contract to build 200 bombers, the Boeing entry (prototype Model 299/XB-17) outperformed both competitors and exceeded the air corps' performance specifications.  Although Boeing lost the contract (to the Douglas B-18 Bolo) because the prototype crashed, the air corps ordered 13 more B-17s for further evaluation.  From its introduction in 1938, the B-17 Flying Fortress evolved through numerous design advances, becoming the third-most produced bomber of all time, behind the B-24 and the multirole Ju 88.

Seilbomb: A Seilbombe (] , plural Seilbomben, ] ), literally "rope bomb", was a secret German weapon developed during the Second World War designed to disable the electrical power grid of an invaded territory.  Equipped with it, a German Messerschmitt Bf 110 fighter plane or an Arado 196 float plane would fly low at night over areas near enemy power plants or urban centers where power lines were located and would use it to cause local blackouts.  This would, it was hoped, lead to civilian panic and the inability of local opposing forces to coordinate a defense.  The piloting of planes so equipped was extremely dangerous, as it required the pilot to fly his plane almost directly at enemy power lines in the dark when visibility was already severely limited and within easy range of anti-aircraft fire.

Fuel pump: A fuel pump is a frequently (but not always) essential component on a car or other internal combustion engined device.  Many engines (older motorcycle engines in particular) do not require any fuel pump at all, requiring only gravity to feed fuel from the fuel tank or under high pressure to the fuel injection system.  Often, carbureted engines use low pressure mechanical pumps that are mounted outside the fuel tank, whereas fuel injected engines often use electric fuel pumps that are mounted inside the fuel tank (and some fuel injected engines have two fuel pumps: one low pressure/high volume supply pump in the tank and one high pressure/low volume pump on or near the engine).

Supporting paragraphs: Texas Raiders Boeing B-17 Flying Fortress
Answer: four-engine