Tag Archives: Aircraft Accident

2 March 1978

Aviation, , , , , , , , , , , ,
Republic F-105F-1-RE Thunderchief (converted to F-105G Wild Weasel III) 63-8321, 561st TFS, 35th TFW, at George AFB, Victorville, California. (Image from Michael Klaver Collection at www.thexhunters.com)
Republic F-105F-1-RE Thunderchief (converted to F-105G Wild Weasel III) 63-8321, 561st TFS, 35th TFW, at George AFB, Victorville, California. (Image from Michael Klaver Collection at www.thexhunters.com)

2 March 1978: Major Charles Thomas Fulop and First Lieutenant William A. Stone departed George Air Force Base, Victorville, California, in a Republic F-105G Thunderchief, 63-8321, call sign “Thud 71.” Their mission was a routine instrument training flight, making instrument approaches and departures at NAS Point Mugu on the southern California coast, then return to George AFB.

The weather surrounding Point Mugu was poor, with heavy clouds, rain and fog. Thud 71 made an instrument approach to the airfield and then initiated a missed approach, a normal procedure for a training flight. However, while climbing out, the pilot, Major Fulop, radioed Mugu Approach Control that he had a problem and requested an immediate return to George AFB. His request was approved.

Approach Control then lost the fighter bomber’s radar transponder signal. Fulop declared an emergency, and requested an immediate return to Point Mugu for landing. He stated that the altimeter had failed and that he was trying to climb above the clouds.

Moments later, witnesses in Thousand Oaks and Newbury Park saw the F-105 diving out of the overcast. Major Fulop initiated the ejection sequence for the Electronics Warfare Officer, Lieutenant Stone, in the back seat. Stone was ejected and parachuted to safety. He suffered a broken arm.

The witnesses said that the pilot was obviously steering the Thunderchief away from homes surrounding the open space of Wildwood Regional Park. Thud 71 crashed on the west side of Hill Canyon. The airplane exploded on impact and Major Fulop was killed.

The crash site is less than two miles (three kilometers) from where I am now sitting.

Major Charles T. Fulop, United States Air Force, with his Republic F-105G Thunderchief at George Air Force Base, california.
Major Charles Thomas Fulop, United States Air Force, 561st Tactical Fighter Squadron, 35th Tactical Fighter Wing, with a Republic F-105G Wild Weasel III at George Air Force Base, California. (www.thexhunters.com)

Charles Thomas Fulop was born 6 October 1946 at Barberton, Ohio. He was the second son of Louis James Fulop and Elizabeth Theresa Ittes Fulop. He graduated from Copley High School in Akron, Ohio. He then attended Miami University, Oxford,  where he was a member of the Delta Chi fraternity, graduating in 1968.

Fulop joined the United States Air Force, 14 May 1969. He was trained as a B-52 navigator. Later selected for flight training, Captain Fulop was assigned to Class 73-06 at Laughlin Air Force Base, Del Rio, Texas. He was an Outstanding Graduate and was awarded his pilot’s wings, 26 February 1973. Captain Fulop was then assigned to a McDonnell Douglas F-4 Phantom II squadron at Homestead Air Force Base, Florida.

On 20 December 1969, Charles Fulop married Miss Cheryl P. Lewis at Sacramento, California. They would have two daughters, Michelle and Kelley.

Major Fulop was buried in the Veteran’s Court at Saint Mary’s Catholic Cemetery, Sacramento, California.

Republic F-105G Thunderchief 63-9320 Wild Weasel at the National Museum of the United States Air Force. This is the sister ship of Thud 71. (U.S. Air Force)

The F-105 was the largest single-seat, single-engine combat aircraft in history. It was designed as a Mach 2+ tactical nuclear strike aircraft and fighter-bomber. The fuselage of the F-105B incorporated the “area rule” which gave the Thunderchief its characteristic “wasp waist” shape. The F-105F was a two-place variant, flown by a pilot and a weapons system operator. Its high speed, low radar cross-section, and heavy bomb load capacity made it a good candidate for the “Wild Weasel” mission: locating and attacking enemy radar and surface-to-air missile installations.

The F-105F/G Thunderchief was 67 feet (20.422 meters) long with a wingspan of 34 feet, 11 inches (10.643 meters) and overall height of 20 feet, 2 inches (6.147 meters). Its wings were swept 45° at 25% chord. The angle of incidence was 0° and there was no twist. The wings had 3° 30′ anhedral. The total wing area was 385 square feet (35.8 square meters). Modified to the Wild Weasel III configuration, it had an empty weight of 31,279 pounds (14,188 kilograms), and a maximum takeoff weight of 54,580 pounds (24,757 kilograms).

Republic F-105G Wild Weasel III 63-8320, sister ship of Major Fulop’s 63-8321. (U.S. Air Force)

The Thunderchief was powered by one Pratt & Whitney J75-P-19W engine. The J75 is a two-spool axial-flow afterburning turbojet with water injection. It has a 15-stage compressor section (8 low- and and 7 high-pressure stages) and 3-stage turbine section (1 high- and 2 low-pressure stages.) The J75-P-19W is rated at 14,300 pounds of thrust (63.61 kilonewtons), continuous power; 16,100 pounds (71.62 kilonewtons), Military Power (30-minute limit); and Maximum Power rating of 24,500 pounds (108.98 kilonewtons) with afterburner (15-minute limit). The engine could produce 26,500 pounds of thrust (117.88 kilonewtons) with water injection, for takeoff. The J75-P-19W is 21 feet, 7.3 inches (6.586 meters) long, 3 feet, 7.0 inches (1.092 meters) in diameter, and weighs 5,960 pounds (2,703 kilograms).

The F-105G Wild Weasel III had a cruising speed of 514 knots (592 miles per hour/952 kilometers per hour). Its maximum speed was 681 knots at Sea Level—0.78 Mach—and  723 knots (832 miles per hour/1,339 kilometers per hour) at 36,000 feet (10,973 meters)—Mach 1.23. It could climb to 30,000 feet (9,144 meters) in 28.0 minutes. The F-105G’s combat ceiling was 43,900 feet (13,381 meters), and it had a combat radius of 391 nautical miles (450 statute miles/724 kilometers). The maximum ferry range, with external fuel tanks, was 1,623 nautical miles (1,868 statute miles/3,006 kilometers).

A Republic F-105G Wild Weasel III, serial number 62-4423, of the 6010th Wild Weasel Squadron, takes of from Korat Royal Thai Air Base, circa 1971. The modified Thunderchief is armed with an AGM-45 Shrike on the outboard hardpoint, and an AGM-78 Standard HARM on the right inboard hardpoint. (U.S. Air Force)

The Wild Weasel III was armed with one M61A1 Vulcan 20 mm six-barrel rotary cannon with 581 rounds of ammunition, one AGM-78 Standard High-Speed Anti-Radiation Missile (HARM),  and two AGM-45A Shrike anti-radiation missiles.

65 F-105Fs were converted to the F-105G Wild Weasel III configuration. Republic Aviation Corporation built 833 F-105 Thunderchief fighter bombers at its Farmingdale, New York, factory. 334 of them were lost in combat during the Vietnam War.

Thud 71’s sister ship, Republic F-105G Thunderchief 63-8320, shot down three enemy MiG fighters. It is on display at the National Museum of the United States Air Force, Wright Patterson Air Force Base, Ohio.

Republic F-105F-1-RE Thunderchief (converted to F-105G Wild Weasel III) 63-8320 at the National Museum of the United States Air Force, Wright-Patterson AFB. (U.S. Air Force)
Republic F-105F-1-RE Thunderchief (converted to F-105G Wild Weasel III) 63-8320 at the National Museum of the United States Air Force, Wright-Patterson AFB. (U.S. Air Force)

© 2021, Bryan R. Swopes

1 March 1962

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Sikorsky S-61L N300Y, Los Angeles Airways, at Disneyland Heliport, Anaheim, California. (Robert Boser)
Sikorsky S-61L N300Y, Los Angeles Airways, at Disneyland Heliport, Anaheim, California. (Robert Boser)

1 March 1962: Los Angeles Airways inaugurated scheduled passenger service utilizing twin-engine, turbine-powered helicopters.

Shown in the photograph above is LAA’s Sikorsky S-61L, FAA registration N300Y, at the Disneyland Heliport, Anaheim, California. LAA was the first civil operator of the S-61, purchasing them at a cost of $650,000, each. N300Y was the prototype S-61L, serial number 61031. On 14 August 1968, N300Y suffered a catastrophic main rotor spindle failure and crashed at Leuders Park, Compton, California. All 21 persons aboard were killed.

Los Angeles Airways began operations in 1947 and continued until 1971. It flew Sikorsky S-51, S-55 and S-61L helicopters.

Los Angeles Airways Sikorsky S-61L N300Y flying over Disneyland, Anaheim, California, circa 1962. (Note: The Disneyland Hotel Sierra Tower is still under construction.) (Unattributed)

The Sikorsky S-61L was a civil variant of the United States Navy HSS-2 Sea King and was the first helicopter specifically built for airline use. The prototype, N300Y, first flew 2 November 1961. It is a large twin-engine helicopter with a single main rotor/tail rotor configuration. Although HSS-2 fuselage is designed to allow landing on water, the S-61L is not amphibious, having standard landing gear rather than the sponsons of the HSS-2 (and civil S-61N).

The S-61L fuselage is 4 feet, 2 inches (1.270 meters) longer than that of the HSS-2. The S-61L is 72 feet, 7 inches (22.123 meters) long and 16 feet, 10 inches (5.131 meters) high, with rotors turning. The fully-articulated main rotor has five blades and a diameter of 62 feet (18.898 meters). Each blade has a chord of 1 foot, 6.25 inches (0.464 meters). The tail rotor also has five blades and a diameter of 10 feet, 4 inches (3.149 meters). They each have a chord of 7–11/32 inches (0.187 meters). At 100% NR, the main rotor turns 203 r.p.m. and the tail rotor, 1,244 r.p.m.

The S-61L was powered by two General Electric CT58-110 turboshaft engines, each of which had a continuous power rating of 1,050 shaft horsepower and maximum power of 1,250 shaft horsepower. The main transmission was rated for 2,300 horsepower, maximum.

The S-61 has a cruise speed of  166 miles per hour (267 kilometers per hour). The service ceiling is 12,500 feet (3,810 meters). Its maximum takeoff weight is 20,500 pounds (9,298.6 kilograms).

Between 1958 and 1980, Sikorsky built 794 S-61-series helicopters. 13 were S-61Ls.

Los Angeles Airways’ Sikorsky S-61L N302Y at LAX, 1962. (Mel Lawrence)
Los Angeles Airways’ Sikorsky S-61L N302Y at LAX, 1962. (Mel Lawrence)

© 2019, Bryan R. Swopes

28 February 1966

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The Flight Crew of Gemini IX, left to right, Commander Elliot McKay See, Jr., United States Navy, and Captain Charles A. Bassett II, U.S. Air Force.

28 February 1966: The primary and back up flight crews of Gemini IX flew from Houston to St. Louis where they planned to visit the McDonnell Aircraft Corporation, where the spacecraft was being built. They flew aboard two Northrop T-38A Talon supersonic trainers which NASA used for proficiency training.

The lead aircraft, NASA 901, was flown by Commander Elliot McKay See, Jr., United States Navy Reserve. See was designated as the Command Pilot for Gemini IX. Captain Charles Arthur (“Charlie”) Bassett II, U.S. Air Force, Pilot, Gemini IX, was in the rear cockpit. NASA 901 was a Northrop T-38A-50-NO Talon 63-8181 (Northrop serial number N.5528).

Northrop T-38A-50-NO Talon 63-8181

The second T-38, NASA 907, was flown by Lieutenant Colonel Thomas P. Stafford, U.S. Air Force, and Lieutenant Commander Eugene A. Cernan, U.S. Navy.

Weather at Lambert-St. Louis Municipal Airport was poor with low clouds and limited visibility in rain and snow. Lambert Field weather at 8:25 a.m. was: sky partially obscured, measured ceiling 800 feet (244 meters) broken, 1,500 feet (457 meters) overcast, visibility 1½ miles (2.4 kilometers) in light rain, light snow, and fog.

Elliot See flew an ILS instrument approach and broke out of the clouds properly aligned with the runaway, but was too high to make a landing. He requested a visual, circling approach. The T-38 entered a 360° turn to the southeast at approximately 500 feet (152 meters). During the circling approach, Stafford, in NASA 907, lost sight of See’s T-38 and executed a missed approach. As his airplane came around to line up for the runway, See radioed that he had the runway in sight, but, at 8:58 a.m., NASA 901 struck the top of McDonnell’s Building 101 and crashed.

The wreck immediately caught fire and both See and Bassett were killed. Sixteen people on the ground were injured.

The accident investigation board found that at approximately 3 seconds before the crash, Elliot See had apparently tried to climb away. The T-38’s angle of bank was significantly reduced and afterburner was selected.

Wreckage of NASA 901. (Scott Dine/St. Louis Post Dispatch)
Burned out wreckage of NASA 901 at Lambert Field, 28 February 1966. (Saint Louis Post-Dispatch)

The T-38 was the world’s first supersonic flight trainer. The Northrop T-38A Talon is a pressurized, two-place, twin-engine, jet trainer. Its fuselage is very aerodynamically clean and uses the “area-rule” (“coked”) to improve its supersonic capability. It is 46 feet, 4.5 inches (14.135 meters) long with a wingspan of 25 feet, 3 inches (7.696 meters) and overall height of 12 feet, 10.5 inches (3.924 meters). The one-piece wing has an area of 170 square feet (15.79 square meters). The leading edge is swept 32°. The airplane’s empty weight is 7,200 pounds (3,266 kilograms) and maximum takeoff weight is approximately 12,700 pounds (5,761 kilograms).

Northrop T-38A-35-NO Talon 60-0582 in flight near Edwards Air Force Base, California. (U.S. Air Force)

The T-38A is powered by two General Electric J85-GE-5 turbojet engines. The J85 is a single-shaft axial-flow turbojet engine with an 8-stage compressor section and 2-stage turbine. The J85-GE-5 is rated at 2,680 pounds of thrust (11.921 kilonewtons), and 3,850 pounds (17.126 kilonewtons) with afterburner. It is 108.1 inches (2.746 meters) long, 22.0 inches (0.559 meters) in diameter and weighs 584 pounds (265 kilograms)

The T-38A has a maximum speed of Mach 1.08 (822 miles per hour/1,323 kilometers per hour) at Sea Level, and Mach 1.3 (882 miles per hour/1,419 kilometers per hour) at 30,000 feet (9,144 meters). It has a rate of climb of 33,600 feet per minute (171 meters per second) and a service ceiling of 55,000 feet (16,764 meters). Its range is 1,140 miles (1,835 kilometers).

Between 1959 and 1972, 1,187 T-38s were built at Northrop’s Hawthorne, California, factory. As of 4 September 2018, 546 T-38s remained in the U.S. Air Force active inventory. The U.S. Navy has 10, and as of 30 October 2018, the Federal Aviation Administration reports 29 T-38s registered to NASA.

Northrop T-38 A Talon (U.S. Air Force)

© 2019 Bryan R. Swopes

26 February 1955

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North American Aviation production test pilot George Franklin Smith with a North American F-100A Super Sabre (NASM)

26 February 1955: Although it was his day off, North American Aviation production test pilot George Franklin Smith stopped by the office at Los Angeles Airport (today, known as Los Angeles International airport, or simply “LAX”, its FAA airport identifier). The company’s flight  dispatcher told him that a brand-new F-100A-20-NA Super Sabre, serial number 53-1659, was sitting on the flight line and needed to be test flown before being turned over to the Air Force.

North American Aviation production test pilot George F. Smith (left) walks away from an F-100 Super Sabre. (Photograph courtesy of Neil Corbett, Test and Research Pilots, Flight Test Engineeers)
North American Aviation production test pilot George F. Smith (left) walks away from an F-100 Super Sabre. (Photograph courtesy of Neil Corbett, Test and Research Pilots, Flight Test Engineeers)

Smith was happy to take the flight. He departed LAX in full afterburner and headed off shore, climbing to 35,000 feet (10,668 meters) over the Pacific Ocean to start the test sequence.

A North American F-100A-1-NA Super Sabre, 52-5757 (the second production airplane) takes off at Los Angeles International Airport. (This airplane, flown by NAA test pilot Bob Hoover, crashed east of Palmdale, California, 7 July 1955, when he could not recover from a flat spin. Hoover safely ejected but the Super Sabre was destroyed.) (North American Aviation, Inc.)

But it was quickly apparent that something was wrong: The flight controls were heavy, and then there was a hydraulic system failure that caused the Super Sabre pitch down into a dive. Smith couldn’t pull it out of the dive and the airplane’s speed rapidly increased, eventually passing Mach 1.

Smith was unable to regain control of the F-100. He had no choice but to bail out. As he ejected, Smith read the instruments: the Mach meter indicated Mach 1.05—785 miles per hour (1,263 kilometers per hour)—and the altitude was only 6,500 feet (1,981 meters).

George F. Smith recovering in hospital after his supersonic ejection. (Getty Images)
Smith recovering in hospital after his supersonic ejection. (Getty Images)

The force of the wind blast hitting him as he came out of the cockpit knocked him unconscious. Estimates are that he was subjected to a 40 G deceleration. His parachute opened automatically and he came down approximately one-half mile off Laguna Beach. Fortunately he hit the water very close to a fishing boat crewed by a former U.S. Navy rescue expert.

The F-100 dived into the Pacific Ocean approximately ¼-mile (0.4 kilometers) offshore between Dana Point and Laguna Beach.

George Smith was unconscious for six days, and when he awoke he was blind in both eyes. After four surgeries and seven months in the hospital, he recovered from his supersonic ejection and returned to flight status.

North American Aviation, Inc. F-100A-20-NA Supre Sabre 53-1646. This fighter is from the same production block as the Super Sabre flown by George F. Smith, 53-1659, 26 February 1955. (Unattributed)

George F. Smith appears in this brief U.S. Air Force informational film:

The North American Aviation F-100 Super Sabre was designed as a supersonic day fighter. Initially intended as an improved F-86D and F-86E, it soon developed into an almost completely new airplane. The fuselage incorporated the “area rule,” a narrowing in the fuselage width at the wings to increase transonic performance, similar to the Convair F-102A.

The Super Sabre had a 49° 2′ sweep to the leading edges of the wings and horizontal stabilizer. The ailerons were placed inboard on the wings and there were no flaps, resulting in a high stall speed in landing configuration. The horizontal stabilizer was moved to the bottom of the fuselage to keep it out of the turbulence created by the wings at high angles of attack. The F-100A had longer wings and a distinctively shorter vertical fin than the YF-100A. The upper segment of the vertical fin was swept 49° 43′.

North American Aviation YF-100A Super Sabre 52-5754 lands on the dry lake at Edwards Air Force Base, California. (North American Aviation, Inc.)

There were two service test prototypes, designated YF-100A, followed by the production F-100A series. The first ten production aircraft (all of the Block 1 variants) were used in the flight testing program.

The F-100A Super Sabre was 47 feet, 1¼ inches (14.357 meters) long with a wingspan of 36 feet, 6 inches (11.125 meters). With the shorter vertical fin than the YF-100A, the initial F-100As had an overall height of 13 feet, 4 inches (4.064 meters), 11 inches (27.9 centimeters) less than the YF-100A.

The F-100A had an empty weight of 18,135 pounds (8,226 kilograms), and gross weight of 28,899 pounds (13,108 kilograms). Maximum takeoff weight was 35,600 pounds (16,148 kilograms). It had an internal fuel capacity of 755 gallons (2,858 liters) and could carry two 275 gallon (1,041 liter) external fuel tanks.

Following North American Aviation test pilot George Welch’s fatal accident, 12 October 1954, NACA designed a new vertical fin for the F-100A. It was taller but also had a longer chord. This resulted in a 10% increase in area. (NASA E-1573)

The early F-100As were powered by a Pratt & Whitney Turbo Wasp J57-P-7 afterburning turbojet engine. It was rated at 9,700 pounds of thrust (43.148 kilonewtons) for takeoff, and 14,800 pounds (65.834 kilonewtons) with afterburner. Later production aircraft used a J57-P-39 engine. The J57 was a two-spool axial flow turbojet which had a 16-stage compressor, and a 3-stage turbine. (Both had high- and low-pressure stages.) The engine was 15 feet, 3.5 inches (4.661 meters) long, 3 feet, 5.0 inches (1.041 meters) in diameter, and weighed 4,390 pounds (1,991 kilograms).

Test Pilot A. Scott Crossfield flew this F-100A-5-NA, 52-5778, in flight testing at the NACA High Speed Flight Station, October–December 1954. (NASA)

The Super Sabre was the first U.S. Air Force fighter capable of supersonic speed in level flight. It could reach 760 miles per hour (1,223 kilometers) at Sea Level. (Mach 1 is 761.1 miles per hour, 1,224.9 kilometers per hour, under standard atmospheric conditions.) Its maximum speed was 852 miles per hour (1,371 kilometers per hour) at 35,000 feet (10,668 meters)—Mach 1.29. The service ceiling was 44,900 feet (13,686 meters). Maximum range with external fuel was 1,489 miles (2,396 kilometers).

The F-100 was armed with four M-39 20 mm autocannons, capable of firing at a rate of 1,500 rounds per minute. The ammunition capacity of the F-100 was 200 rounds per gun.

North American Aviation built 199 F-100A Super Sabres at its Inglewood, California, plant before production shifted to the F-100C fighter bomber variant. Approximately 25% of all F-100As were lost in accidents.

This is the fifth production F-100A-1-NA Super Sabre, 52-5760, in flight southeast of San Bernardino, California. In this photograph, FW-760 has the taller vertical fin that was designed to improve the Super Sabre’s controllability. (U.S. Air Force)

© 2019, Bryan R. Swopes

24 February 1989

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United Air Lines' Boeing 747 N4713U, photographed at Los Angeles International Airport, 14 April 1982. (Ted Quackenbush via Wikipedia)
United Airlines’ Boeing 747-122 s/n 19875, N4713U, photographed at Los Angeles International Airport, 14 April 1982. (Ted Quackenbush via Wikipedia)

24 February 1989: At 01:52:49 HST, United Airlines Flight 811 was cleared for takeoff from Honolulu International Airport (HNL), enroute to Auckland International Airport (AKL) and onward to Sydney, Australia (SYD). On board were 337 passengers and 18 crew members. The airliner was under the command of Captain David Cronin, with First Officer Gregory Slader and Second Officer Randal Thomas. The airliner was a Boeing 747-122, serial number 19875, registered N4713U.

16 minutes after takeoff, about 60 miles (97 kilometers) south of Honolulu, the 747 was climbing through an altitude of 22,000 feet (6,705 meters) at 300 knots (345 miles per hour/556 kilometers per hour) when, at 02:09:09 HST, the cargo door on the lower right side of the fuselage, just forward of the wing, failed, blowing outward. Explosive decompression blew a huge hole in the fuselage. Ten passenger seats were carried away along with nine passengers. A flight attendant was nearly lost, but was dragged back inside by passengers and crew.

The damaaged fuselage of United Airlines Flight 811. (BBC)

Debris damaged the two engines on the right wing, causing them to lose power. Flames were visible. Both engines had to be shut down. Flight 811 declared an emergency, began descending and dumping fuel to reduce the airliner’s weight for an emergency landing. The 747 turned back toward Honolulu.

Because the wing had also been damaged, the flaps could not be fully extended and this required a much higher than normal approach speed. The 747 touched down at approximately 200 knots (230 miles per hour/370 kilometers per hour). After coming to a stop, Flight 811 was completely evacuated within 45 seconds. Every flight attendant suffered some injury.

Damaged forward fuselage of N4713U. (Paul Sakuma/AP)

The cause of the cargo door failure was determined to be a faulty design, combined with a short in the 747’s electrical system. The door was recovered by a U.S. Navy deep sea submersible from a depth of 14,100 feet (4,298 meters).

United Airlines’ Boeing 747 N4713U was repaired and returned to service. It was re-registered N4724U. チャーリーマイクさん

N4713U made its first flight 20 October 1970 and had accumulated 58,814:24 flight hours  and 15,027 cycles prior to takeoff from Honolulu. It was repaired at a cost of $14,000,000 and then returned to service, re-registered N4724U. In 1997, 19875 was sold to Air Dabia and assigned registration C5-FBS. It has since been scrapped.

Air Dabia Boeing 747-100 C5-FBS, photographed January 1998. (Aero Icarus)

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.

Captain David M. Cronin died 6 October 2010 at the age of 81 years.

A surprisingly poor quality image showing teh damage to Boeing 747 N4713U resulting from the failure of the cargo door. (Unattributed)
A surprisingly poor quality image showing the damage to Boeing 747 N4713U resulting from the failure of the cargo door. (Unattributed)

© 2019, Bryan R. Swopes