Tag Archives: Clipper Victor

27 March 1977

A recent photograph looking west-northwest (300° Magnetic) along Runway 30 at Los Rodeos Airport (TFN), Tenerife, Canary Islands. (© Claudio)

27 March 1977: The deadliest accident in the history of aviation occurred when two Boeing 747 airliners collided on the runway on the island of Tenerife in the Canary Islands. 583 people died.

A terrorist incident at Gran Canaria International Airport (LPA) on the island of Gran Canaria resulted in the airport being closed for flight operations. This forced many trans-Atlantic airliners to divert to the smaller Los Rodeos Airport (TFN) on Tenerife. The ramp and taxiways at Los Rodeos were congested and refuelers were overwhelmed by the increased traffic, which led to many delays.

A Pan American World Airways Boeing 747-121, N750PA, similar to N736PA. (Michael Gilliand via Wikipedia)

Los Rodeos Airport has only one runway, Runway 12/30, with a parallel taxiway and four short taxiways joining the two.

Pan American World Airways’ Flight 1736, a Boeing 747-121, FAA registration number N736PA, named Clipper Victor ¹ was ready for takeoff with 380 passengers and crew, but had to “back taxi” on Runway 12 (“One-Two”) because the parallel taxiway was jammed with airplanes. The airliner proceeded east-southeast, intending to exit the runway to the parallel taxiway after passing by the congestion around the terminal.

Also on the runway was Koninklijke Luchtvaart Maatschappij (KLM) Flight 4805, a Boeing 747-206B, PH-BUF, named Rijn (“Rhine”). The KLM jumbo jet had 248 passengers and crew members on board. Flight 4805 had back-taxied for the entire length of Runway 12, then made a 180° turn to align itself with Runway 30, the “active” runway.

KLM Royal Dutch Airways’ Boeing 747-206B PH-BUF, Rijn. (clipperarctic via Wikipedia)

Weather at the time of the accident was IFR, with low clouds and fog. Visibility on the runway was restricted to about 1,000 feet (305 meters). Takeoff rules required a minimum of 2,300 feet (701 meters). What happened next was a misunderstanding between the air traffic controllers and the crew of both airliners.

The control tower instructed KLM 4805 to taxi into position on Runway 30 (“Three-Zero”) for takeoff, and to hold there for release. The Pan Am airliner was told to taxi off the runway and to report when clear. The tower controllers could not see either airliner because of the fog, and their flight crews could not see each other.

The aircraft commander of the Dutch airliner, that company’s Chief Pilot and Chief Flight Instructor, Captain Jacob Veldhuyzen Van Zanten, apparently misunderstood what was occurring and radioed to the tower that he was taking off. He then accelerated.

The crew in the Pan Am airliner heard the KLM pilot report that he was taking off, immediately turned left and ran the engines up to full throttle in order to try to get off the runway. With the KLM 747 accelerating through the fog, its flight crew belatedly realized that the other airliner was still ahead of them. Too late to stop, they applied full power and pulled the nose up trying to takeoff. The tail of their airplane actually dragged over sixty feet (18 meters) on the runway because its extreme nose up angle.

Computer-generated illustration of the moment of impact as KLM Flight 4805 hits Pan Am Flight 1736 on the runway at Tenerife. (PBS Nova)

KLM 4805 lifted off about 300 feet (91 meters) from Pan Am 1736, and because of the high angle of attack, its nose wheel actually passed over American airliner’s fuselage, but the rest of the Dutch airplane hit at 140 knots (259 kilometers per hour). Clipper Victor was ripped in half, caught fire and exploded. Rijn crashed about 250 yards (229 meters) down the runway, and it also caught fire and exploded.

All 248 people aboard the Royal Dutch Airlines airplane were killed. Miraculously, there were 61 survivors from the Pan Am Clipper, including the co-pilot, but the remaining 335 died.

Two Boeing 747 airliners collided on the runway at Tenerife, 27 March 1977. (Unattributed)

The 747-100 series was the first version of the Boeing 747 to be built. It was operated by a flight crew of three and was designed to carry 366 to 452 passengers. It is 231 feet, 10.2 inches (70.668 meters) long with a wingspan of 195 feet, 8 inches (59.639 meters) and overall height of 63 feet, 5 inches (19.329 meters). The interior cabin width is 20 feet (6.096 meters), giving it the name “wide body.” Its empty weight is 370,816 pounds (168,199 kilograms) and the Maximum Takeoff Weight (MTOW) is 735,000 pounds (333,390 kilograms).

The 747-100 is powered by four Pratt & Whitney JT9D-7A high-bypass ratio turbofan engines. The JT9D is a two-spool, axial-flow turbofan engine with a single-stage fan section, 14-stage compressor (11 high- and 3 low-pressure stages) and 6-stage turbine (2 high- and 4 low-pressure stages). The engine is rated at 46,950 pounds of thrust (208.844 kilonewtons), or 48,570 pounds (216.050 kilonewtons) with water injection (2½-minute limit). This engine has a maximum diameter of 7 feet, 11.6 inches (2.428 meters), is 12 feet, 10.2 inches (3.917 meters) long and weighs 8,850 pounds (4,014 kilograms).

The 747-100 has a cruise speed of 0.84 Mach (555 miles per hour, 893 kilometers per hour) at 35,000 feet (10,668 meters). The maximum certificated operating speed is 0.92 Mach. The airliner’s maximum range is 6,100 miles (9,817 kilometers).

The Boeing 747 has been in production for 48 years. More than 1,520 have been delivered to date. 205 of these were the 747-100 series. The U.S. Air Force has selected the Boeing 747-8 as the next presidential transport aircraft.

¹ Pan American World Airways’ Boeing 747 Clipper Victor was the very first Boeing 747 in service. It made its first commercial passenger flight, New York to London, 22 January 1970. Another airliner, Clipper Young America, was scheduled to  make that flight but suffered mechanical problems shortly before departure. Clipper Victor was substituted, but Pan Am changed the airliner’s name to Clipper Young America. On 2 August 1970, N736PA was hijacked to Cuba, and afterwards, to avoid the negative publicity, the name of the 747 was changed back to Clipper Victor.

© 2019, Bryan R. Swopes

22 January 1970

Boeing 747-121 N736PA, Pan American Clipper Young America, watercolor by John T. McCoy. (SFO Museum)

22 January 1970: Captain Robert M. Weeks, Captain John Noland and Flight Engineer August (“Mac”) McKinney flew the Pan American World Airways Boeing 747-121, N736PA, Clipper Young America, from New York to London on a 6 hour, 14 minute inaugural passenger-carrying flight of the new wide-body jet. Aboard were a cabin crew of 17 and 332 passengers.

Crew members of the first Pan Am Boeing 747 to arrive at Heathrow. (Rolls Press/Pepperfoto/Getty Images via The Guardian)

The Associated Press reported:

The 747 Age Is Here

     LONDON (AP)—A Boeing 747 jetliner arrived in London from New York today on the maiden transatlantic commercial jumbo jet flight.

     An overheated engine grounded the original aircraft and a substitute called Young America left New York at 1:52 a.m. EST, nearly seven hours after the scheduled departure time. The jet, carrying 332 passengers and 20 crew, touched down at London’s Heathrow Airport at 8:06 a.m. EST.

     London Airport services were geared to deal as quickly as possible with the passengers and 30,000 pounds of baggage and cargo aboard the Pan American World Airways jumbo.

     SOME PASSENGERS booked on the return flight to New York switched to other aircraft because of today’s delays, but a Pan Am spokesman said most of the passengers were waiting for the Jumbo.

     The [sic] included actress Raquel Welch, who has been making a television spectacular in London.

     The Boeing took 6 hours 15 minutes on the Atlantic flight. The pilot was Capt. Robert M. Weeks, 49, a veteran of 28 years with Pan Am who has logged more than 15,000 hours on Pan Am routes.

     THE AIRCRAFT drew up at stand 1-29 on Heathrow’s Pier Five at 8:10 a.m., and passengers began disembarking four minutes later.

     One of the passengers, Mrs. Joe Tepera of Fort Worth Tex., told newsmen: “The flight was simply great. Flying in a beautiful plane like that was worth the delay.

     “All the passengers were good humored and when the plane finally took off they applauded. They did the same when it landed. I personally would not hesitate flying in a jumbo again.”

     Michael J. Flynn of Chicago said: “The delay didn’t bother me much. We were given a first class meal. It’s a good plane.”

     BUT ONE PASSENGER, who declined to be named, said he was annoyed at the service aboard the jumbo and the delay caused by switching planes in New York.

     “The plane is simply too big for anyone to be given proper service,” he said.

     Michael Brody, 21-year-old American who claims he wants to give away his multimillion-dollar fortune, was among the passengers.

     “I am here for a rest. I am not going to give away any more money in Britain,” he told newsmen.

     A Pan Am spokesman said the jumbo had been rechristened Young America in New York for the historic flight, but the aircraft carried the name Clipper Victor on its fuselage on arrival here.

     THE HUGE PLANE made most of the smooth flight at 33,000 feet.

     Richard Hobson, air correspondent of the British Press Association, who traveled on the jumbo, said: “From my position in one of the economy sections of the 747 where the seating is nine-abreast, divided by two aisles, was like being in a news theater. A film show—and the plane is equipped for them—would have completed the illusion.”

     Pan Am has received five of the 33 jumbos ordered. Trans World Airlines plans to start jumbo service in March and British Overseas Airways Corp. will receive the first of 12 jumbos early in April and hopes to get them in service in June.

     A British Airport Authority spokesman reported the first passenger cleared all baggage and airport formalities 34 minutes after the jet touched down.

     “IT DOESN’T LOOK bad at all,” he said.

     The spokesman gave this breakdown on times for clearing the jumbo’s passengers:

Time arrive 8:06 a.m. EST.
Doors open: 8:19.
First passenger off plane: 8:20
Last passenger off plane: 8:32.
First passenger into baggage hall: 8:34.
Last passenger into baggage hall: 8:57.
First passenger into immigration: 8: …
Last passenger out of immigration: 8:39.
First passenger into customs: 8:25.
Last passenger out of customs: 9:04.
First passenger to clear airport: 8:46.
Last passenger to clear airport: 9:05.

     Six Pan Am buses took the passengers into London.

Honolulu Star-Bulletin, Vol. 59, No. 22, 22 Jan 1970, Page D-16, Columns 1–8

Pan American World Airways’ Boeng 747-121, N732PA, Clipper Storm King. (Aldo Bidini via Wikimedia)

The 747-100 series was the first version of the Boeing 747 to be built. It was operated by a flight crew of three and was designed to carry 366 to 452 passengers. It is 231 feet, 10.2 inches (70.668 meters) long with a wingspan of 195 feet, 8 inches (59.639 meters) and overall height of 63 feet, 5 inches (19.329 meters). The interior cabin width is 20 feet (6.096 meters), giving it the name “wide body.” Its empty weight is 370,816 pounds (168,199 kilograms) and the Maximum Takeoff Weight (MTOW) is 735,000 pounds (333,390 kilograms).

The 747-100 is powered by four Pratt & Whitney JT9D-7A high-bypass ratio turbofan engines. The JT9D is a two-spool, axial-flow turbofan engine with a single-stage fan section, 14-stage compressor (11 high- and 3 low-pressure stages) and 6-stage turbine (2 high- and 4 low-pressure stages). The engine is rated at 46,950 pounds of thrust (208.844 kilonewtons), or 48,570 pounds (216.050 kilonewtons) with water injection (2½-minute limit). This engine has a maximum diameter of 7 feet, 11.6 inches (2.428 meters), is 12 feet, 10.2 inches (3.917 meters) long and weighs 8,850 pounds (4,014 kilograms).

The 747’s cruise speed is 0.84 Mach (555 miles per hour, 893 kilometers per hour) at 35,000 feet (10,668 meters) and it’s maximum speed is 0.89 Mach (588 miles per hour/946 kilometers per hour). The maximum range at MTOW is 6,100 miles (9,817 kilometers).

The Boeing 747 was MUCH BIGGER than the Boeing 707 that it replaced. (CBS News/Boeing)

N736PA had initially been named Clipper Victor, but the name was changed to Clipper Young America for the inaugural New York to London flight when the 747 scheduled to make that flight—Clipper Young America—suffered mechanical problems. The 747 was hijacked on 2 August 1970 and flown to Cuba. After that incident, N736PA was renamed Clipper Victor — its original name. It was destroyed in a collision with another Boeing 747 at Tenerife, Canary Islands, 27 March, 1977.

Pan American Airways' Boeing 747-121 N736PA, Clipper Young America, at London Heathrow Airport, 22 January 1970. (Getty Images via BBC History)
Pan American Airways’ Boeing 747-121 N736PA, Clipper Young America, at London Heathrow Airport, 22 January 1970. (Getty Images via BBC History)

The 747 has been in production for 53 years. As of January 2022, 1,569 747s of all models had been built. 205 of these were 747-100 series aircraft. On 12 January 2021, Boeing announced that the final 747s, four Boeing 747-8F freighters, had been ordered by Atlas Air Worldwide Holdings, Inc. The final Boeing 747, N862GT, was rolled out of the factory on 3 October 2022. The production of the “jumbo jet” has come to a close.

The final Boeing 747, a 747-8F freighter, N862GT, is rolled out of the factory at Paine Field, 3 October 2022. (Image by PaineAirport.com via Twitter)

© 2023, Bryan R. Swopes