Tag Archives: Boeing 707

28 October 1957

The first production Boeing 707 after being rolled out of the final assembly plant at Renton, Washington, 28 October 1957. (Boeing)

28 October 1957: The first production Boeing 707 jet-powered commercial airliner, serial number 17586 (Line Number 1), was rolled out at the Boeing aircraft assembly plant at Renton, Washington. The Model 707 was developed from the earlier Model 367–80, the “Dash Eighty,” prototype for an air-refueling tanker which would become the KC-135 Stratotanker.

17586 was a Model 707-121. The new airliner had been sold to Pan American World Airways, the launch customer, as part of an order for twenty 707s in October 1955. The Federal Aviation Agency (FAA) assigned N708PA as its registration mark.

The first production Boeing 707 after roll out, 28 October 1957. (Boeing)

N708PA made its first flight 20 December 1957 with Boeing’s Chief of Flight Test, Alvin M. (“Tex”) Johnston. The airplane was initially used for flight and certification testing. Once this was completed, the new jet airliner was prepared for commercial service and delivered to Pan American at San Francisco International Airport (SFO), 30 November 1958. It was named Clipper Constitution.

Boeing 707-121 N708PA, photographed during its second flight, 20 December 1957. (Boeing)

In February 1965, the airliner was upgraded to 707-121B standards, which replaced the original turbojet engines with quieter, more efficient Pratt & Whitney Turbo Wasp JT3D-1 turbofan engines which produced 17,000 pounds of thrust. The wing inboard leading edges were modified to the design of the Model 720 and there was a longer horizontal tail plane.

Clipper Constitution flew for Pan Am for nearly 8 years, until 17 September 1965, when it crashed into Chances Peak, a 3,002 foot (915 meters) active stratovolcano on the Caribbean island of Montserrat. The point impact was 242 feet (74 meters) below the summit. All aboard, a crew of 9 and 21 passengers, were killed.

Boeing 707-121 N708PA retracts its landing gear after taking off at Seattle Tacoma Airport. (Unattributed)

The Boeing Model 707-121 was a four-engine jet transport with swept wings and tail surfaces. The leading edge of the wings were swept at a 35° angle. The airliner had a flight crew of four: pilot, co-pilot, navigator and flight engineer.

The 707-121 was 145 feet, 1 inch (44.221 meters) long with a wing span of 130 feet, 10 inches (39.878 meters). The top of the vertical fin stood 42 feet, 5 inches (12.929 meters) high. The 707 pre-dated the ”wide-body” airliners, having a fuselage width of 12 feet, 4 inches (3.759 meters).

The first versions were powered by four Pratt & Whitney Turbo Wasp JT3C-6 turbojet engines, producing 11,200 pounds of thrust (49,820 kilonewtons), and 13,500 pounds (60.051 kilonewtons) with water injection. This engine was a civil variant of the military J57 series. It was a two-spool axial-flow turbojet engine with a 16-stage compressor and 3 stage turbine. The JT3C-6 was 11 feet, 6.6 inches (3.520 meters) long, 3 feet, 2.9 inches (0.988 meters) in diameter, and weighed 4,235 pounds (1,921 kilograms).

The airliner’s empty weight is 122,533 pounds (55,580 kilograms). Maximum take off weight is 257,000 pounds (116,573 kilograms). At MTOW, the 707 required 11,000 feet (3,353 meters) of runway to take off.

The 707-121 had a maximum speed is 540 knots (1,000 kilometers per hour). Its range was 2,800 nautical miles (5,186 kilometers).

The Boeing 707 was in production from 1958 to 1979. 1,010 were built. Production of military variants continued until 1994.

© 2018, Bryan R. Swopes

19 May 1963

Boeing VC-137C Stratoliner 62-6000, SAM 26000. (Boeing)

19 May 1963: During a non-stop flight from Andrews Air Force Base, outside Washington, D.C., to Moscow, Russia, Union of Soviet Socialist Republics, a Boeing VC-137C, 62-6000, under the command of Colonel James B. Swindal, United States Air Force, set 15 Fédération Aéronautique Internationale (FAI) World Records for Speed Over a Recognized Course. Colonel Swindal flew the airplane, commonly known as Air Force One, 5,004 miles (8,053.2 kilometers) in 8 hours, 39 minutes, 2 seconds, averaging 490.96 miles per hour (790.12 kilometers per hour). On the return flight, 15 additional records were set.

The fastest segment of the flight was from to Boston, Massachusetts to Oslo, Norway, at an average speed of 952.62 kilometers per hour (591.93 miles per hour).¹

The New York Times reported:

MOSCOW — President Kennedy’s Air Force jet today set a nonstop speed record between Washington and Moscow and shattered 14 other air records. The $8 million Boeing 707, carrying a ten-man party headed by Atomic Energy Commission chairman Glenn T. Seaborg, touched down eight hours 38 minutes and 42 seconds after takeoff — the fastest flight ever made between the U.S. and the Soviet Union. Interred was a Soviet myth that the U.S. lacked a plane able to make a 5,000-mile run nonstop. The black-nosed blue and white jet, piloted by Col. James B. Swindal, 46, of Falls Church, Virginia, made it with fuel for more than two hours of flight remaining, proving that any delays in reaching a commercial agreement are political, not technical.

The New York Times, 19 May 1963

The Washington Post reported that

. . . On board were a Soviet navigator and a Soviet radio operator, the usual requirements for all international flights over Soviet territory. The two men, both speaking English, flew to Washington to make the flight.

The Washington Post, 20 May 1963

Cockpit of Boeing VC-137C 62-6000, SAM 26000, at the National Museum of the United States Air Force, Wright-Patterson Air Force Base, Ohio. (Washington Blaze)

The Boeing VC-137C was the first of two specially-configured Boeing 707-353B airliners used by the President of the United States, or other senior administration officials. The distinctive white, blue and natural metal livery was created by the famed industrial designer Raymond Loewy.

When the president is aboard, the airplane is designated “Air Force One”. At other times, it uses the Special Air Mission designation, SAM 26000. The airplane entered service in 1962, replacing the three earlier commercial Boeing 707-153 airliners, which were designated VC-137A Stratoliner, USAF serial numbers 58-6970–58-6972.

SAM 26000 was itself replaced by SAM 27000 in 1972, though it remained available as a back-up aircraft. It was retired to the National Museum of the United States Air Force on 20 May 1998.

Boeing VC-137C Stratoliner 62-6000, SAM 26000. (Ralf Manteufel/Wikipedia)

James Barney Swindal was born 18 August 1917 in West Blocton, Alabama. He was the first of two children of Samuel Young Swindal, a carpenter, and Ida Maranda Kornegay Swindal.

James Barney Swindal married Miss Emily Mae Glover on 18 November 1936, at Birmingham, Alabama. They would have two children. He was employed as a crane operator for a cast iron pipe company in Birmingham.

Swindal enlisted as an aviation cadet in the U.S. Army at Montgomery, Alabama, 28 February 1942, shortly after the United States entered World War II. He was blonde with blue eyes, 5 feet, 11 inches (1.80 meters) tall, and weighed 147 pounds (67 kilograms). Trained as a pilot in the U.S. Army Air Forces, he flew transports in the China-Burma-India (CBI) theater of operations. After the War, he participated in the Berlin Airlift.

Swindal became President Kennedy’s personal pilot in 1960. He flew JFK to Berlin for his famous “Ich bin ein Berliner” speech, 26 June 1963, and later flew President Kennedy’s casket from Dallas, Texas to Washington, D.C.  Colonel Swindal retired from the Air Force in 1971. When SAM 26000 arrived at the National Museum of the United States Air Force, he sat in its cockpit for a last time.

Colonel Swindal died at Cape Canaveral, Florida, 25 April 2006, at the age of 88 years. He was buried at the Arlington National Cemetery, Arlington, Virginia.

Colonel James B. Swindal, United States Air Force is congrtulated on his promotion by President John F. Kennedy. (Presidential Library)
Colonel James B. Swindal, United States Air Force, is congratulated on his promotion by President John F. Kennedy, 19 March 1962. (Robert Knudsen. White House Photographs. John F. Kennedy Presidential Library and Museum, Boston JFKWHP-1962-03-19-C)

¹ FAI Record File Number 16472

© 2018, Bryan R. Swopes

19 May 1959

Boeing 707-436 Intercontinental N31241 (Associated Press)

19 May 1959: The first Boeing 707-436 Intercontinental, FAA registration N31241, made a 1 hour, 11 minute first flight from Renton to Boeing Field, Seattle, Washington.  The -436 was a stretched version of the original 707-120, but with Rolls-Royce Conway 508 bypass turbojet engines (now called turbofans) in place of the standard Pratt & Whitney JT3C-6 turbojet engines.

The fuselage and wings of the Intercontinental were lengthened, allowing an increased load and greater fuel capacity. It could carry 189 passengers and had a range 1,600 miles further than the -120. Transoceanic flights without an intermediate fuel stop were possible.

This airplane was the first of 15 which had been ordered by British Overseas Airways Corporation in 1956. It was re-registered G-APFB and delivered to BOAC 9 May 1960.

Boeing 707 Intercontinental “hero shot” from Boeing website. (Boeing)

Initially, British aviation authorities refused to certify the -436 because of low-speed handling concerns. Boeing increased the height of the vertical fin 40 inches and added a ventral fin. These modifications became standard on all future 707s and were retro-fitted to those already manufactured.

G-APFB served BOAC until 1974, and then with other airlines. It was sold to Boeing Commercial Airplane Company in 1976. The forward fuselage and cabin was shipped to Renton for use in Boeing’s E-3A Sentry program. The remainder of the airliner was scrapped in 1978.

British Overseas Airways Corporation’s Boeing 707-436 Intercontinental, G-APFE. (BOAC)

The Boeing 707-420 series airliners were 152 feet, 11 inches (46.609 meters) long, with a wingspan of 142 feet, 5 inches (43.409 meters) and overall height 42 feet, 2 inches (12.852 meters) at its operating empty weight. The leading edges of the wings and tail surfaces are swept 35°. The fuselage has a maximum diameter of 12 feet, 8.0 inches (3.759 meters). The 707 International has a typical empty weight of 142,600 pounds (64,682 kilograms), and a maximum takeoff weight (MTOW) of 312,000 pounds (141,700 kilograms). The usable fuel capacity is 23,820 gallons (90,169 liters).

All 707-series aircraft are powered by four jet engines installed in nacelles below and forward of the wings on pylons. The -420 Internationals were powered by Rolls-Royce Conway Mk. 508 engines. The Rolls-Royce Conway (R.Co.12) is a two-spool, axial-flow, low-bypass turbofan engine. The engine has a 7-stage low- and 9-stage high-pressure compressor section, 12 interconnected combustion liners, with a single-stage high- and 2-stage low-pressure turbine. The Mk. 508 has a Maximum Continuous Power rating of 14,625 pounds of thrust (65.055 Kilonewtons), and 17,500 pounds of thrust (77.844 Kilonewtons) at 9,990 r.p.m., for Takeoff. The engine is 3 feet, 6.0 inches (1.067 meters) in diameter, 11 feet, 4.0 inches (3.454 meters) long, and weighs 4,542 pounds (2,060 kilograms).

The -420 series had a maximum cruise speed of 593 miles per hour 954 kilometers per hour) at 30,000 feet (9,144 meters)—0.87 Mach; and economical cruise speed of 550 miles per hour (885 kilometers per hour) at 35,000 feet (10668 meters).

Boeing built 1,010 Model 707 airplanes between 1957 and 1979. Of these, 37 were the 707-420 Intercontinental variant.

A British Overseas Airways Corporation Boeing 707 Intercontinental airliner, similar in appearance to G-APFB. (Travell Update)

© 2018, Bryan R. Swopes