Daily Archives: September 10, 2023

10 September 1993

The 1,000th Boeing 747-400 is rolled out. (Wikipedia)
The 1,000th Boeing 747 is rolled out. (Wikipedia)

10 September 1993: Boeing completed production of the 1,000th 747 commercial transport, a 747-412, c/n 27068, delivered to Singapore Airlines and assigned civil registration 9V-SMU.

The 747-400 was a major development of the 747 series. It had many structural and electronics improvements over the earlier models, which had debuted 18 years earlier. New systems, such as a “glass cockpit,” flight management computers, and new engines allowed it to be flown with a crew of just two pilots, and the position of Flight Engineer became unnecessary. The most visible features of the –400 are its longer upper deck and the six-foot tall “winglets” at the end of each wing, which improve aerodynamic efficiency be limiting the formation of wing-tip vortices.

At the time of its first flight, Boeing had already received orders for 100 747-400s. It would become the most popular version, with 694 aircraft built by the time production came to an end 15 March 2007.

The 1,000th Boeing 747, Singapore Airline's 747-412 9V-SMU, 20 November 2011. (Wikipedia)
The 1,000th Boeing 747, Singapore Airline’s 747-412 9V-SMU, 20 November 2011. (Wikipedia)

The Boeing 747-400 airliner can carry between 416 and 524 passengers, depending on configuration. It is 231 feet, 10 inches (70.663 meters) long with a wingspan of 211 feet, 5 inches (64.440 meters) and overall height of 63 feet, 8 inches (19.406 meters). Empty weight is 394,100 pounds (178,760.8 kilograms). Maximum takeoff weight (MTOW) is 875,000 pounds (396,893.3 kilograms). While the prototype was powered by four Pratt & Whitney PW4056 turbofan engines, production airplanes could be ordered with PW4062, General Electric CF6 or Rolls-Royce RB211 engines, providing thrust ranging from 59,500 to 63,300 pounds. The –400 has a cruise speed of 0.85 Mach (567 miles per hour, 912 kilometers per hour) and maximum speed of 0.92 Mach (614 miles per hour, 988 kilometers hour). Maximum range at maximum payload weight is 8,355 miles (13,446 kilometers).

Singapore Airlines retired 9V-SMU in December 2010. It was acquired by Aircastle Limited in 2011, converted to a freighter for Aircastle Limited and re-registered as N417AC. It was next leased to Southern Air Inc., 20 January 2012, with a new N-number, N400SA. On 30 December 2014, c/n 27068 was withdrawn from service and placed in storage at MoD St. Athan Airport, Wales. It is reported to have been broken up in December 2015.

Southern Air N400SA
Southern Air Boeing 747-400 N400SA at Flughafen Leipzig/Halle, 10 April 2014. (Ad Meskens via Wikipedia)

© 2021, Bryan R. Swopes

10 September 1956

North American Aviation North American Aviation F-107A S/N 55-5118 rolling out at Edwards Air Force base. (U.S. Air Force)
North American Aviation F-107A S/N 55-5118 rolling out at Edwards Air Force Base. (U.S. Air Force)
Joel Robert Baker (1920–2011). (Photograph courtesy of Neil Corbett)
Joel Robert Baker (1920–2011). (Photograph courtesy of Neil Corbett)

10 September 1956: North American Aviation test pilot Joel Robert (“Bob”) Baker made the first flight of the F-107A-NA 55-5118, a pre-production tactical fighter bomber, reaching a speed of Mach 1.03. On landing the drogue parachute did not deploy and due to the high speed on rollout, the nose gear strut collapsed, causing minor damage to the new aircraft.

The F-107A was designed as a Mach 2+ fighter bomber capable of carrying nuclear weapons. The plan to carry a Mark 7 bomb in a centerline recess in the aircraft’s belly resulted in the radical appearance of the airplane, with the engine intake mounted above and behind the cockpit.

Based on the F-100 Super Sabre, it was originally designated F-100B, but this was changed to F-107A prior to the first flight.

The North American Aviation F-107A was a single-seat, single-engine supersonic fighter bomber. It was equipped with a very sophisticated stability augmentation system. The F-107A was 61 feet, 10 inches  (18.847 meters) long with a wingspan of 36 feet, 7 inches (11.151 meters) and height of 19 feet, 8 inches (5.994 meters). Its empty weight was 22,696 pounds (10.295 kilograms) and had a maximum takeoff weight of 41,537 pounds (18,841 kilograms).

The airplane was powered by a Pratt & Whitney YJ75-P-11 afterburning turbojet which produced a maximum 24,500 pounds of thrust (108.98 kilonewtons).

This gave the F-107A a maximum speed of 890 miles per hour (1,432 kilometers per hour) at Sea Level, and 1,295 miles per hour (2,084 kilometers per hour) at 36,000 feet (10,973 meters). It could climb at an initial rate of 39,900 feet per minute (202.7 meters per second) and had a service ceiling of 53,200 feet (16,215 meters).

North American Aviation F-107A 55-5118 in flight. (U.S. Air Force)
North American Aviation F-107A 55-5118 in flight. (U.S. Air Force)

The Mark 7 was a variable-yield fission bomb that could be pre-set to detonate with ranges between 8 and 61 kilotons. It weighed approximately 1,700 pounds (771 kilograms).

The second F-107A, 55-5119, was the weapons test aircraft and was armed with four 20mm M39 cannon with 200 rounds per gun.

The F-107A was in competition with Republic’s F-105 Thunderchief, which was selected by the Air Force for production. Only three F-107A test aircraft were built.

After Air Force testing, two F-107s, 55-5118 and 55-5120, were turned over to the NACA High-Speed Flight Station for use as research aircraft. John Barron (“Jack”) McKay was assigned as the project pilot. 55-5118 made only 4 flights for NACA before being grounded. 55-5120 made 42 flights.

Today, 55-5118 is at the Pima Air and Space Museum, Tucson, Arizona. Its sister ship, 55-5119, is at the National Museum of the United States Air Force, Wright-Patterson AFB, Ohio. The third airplane, 55-5120, was damaged on takeoff with test pilot Scott Crossfield in the cockpit, 1 September 1959. It was not repaired.

The second F-107A, 55-5119, turns from downwind to base leg for landing on Runway 4, Edwards Air Force Base. This was the only one of the three prototypes to be equipped with 20 mm M39 cannon.(U.S. Air Force)
The first XF-107, 118 arrives at HSFS, 6 November 1957. (NASA E-57-3192)

© 2015, Bryan R. Swopes