Tag Archives: McDonnell Douglas KC-10A Extender

12 July 1980

The first McDonnell Douglas KC-10A Extender, 79-0433, in flight. The airplane is carrying civil registration N110KC rather than its U.S. Air Force serial number. (Boeing)

12 July 1980: The first McDonnell Douglas KC-10A Extender, serial number 79-0433, made its first flight at Long Beach, California with company test pilots Walt Smith and George Jansen, flight engineer Leo Hazell, and flight test engineer Guy Lowery.

Based on the DC-10-30CF commercial transport, this aerial tanker can carry 356,000 pounds of fuel (161,479 kilograms). Using a “flying boom” to refuel Air Force aircraft in flight, it also is equipped with “hose and drogue” system to refuel U.S. Navy and Marine airplanes. Both systems can be used simultaneously. The KC-10A can also carry cargo pallets, or combination of personnel and cargo.

McDonnell Douglas KC-10A Extender 79-0433 (N110KC) seen from above. (McDonnell Douglas)
McDonnell Douglas KC-10A Extender 79-0433 (N110KC) seen from above. (McDonnell Douglas)

The McDonnell Douglas KC-10A Extender is operated by a flight crew of four. It is 181 feet, 7 inches (54.347 meters) long with a wingspan of 165 feet, 4 inches (50.394 meters) and height of 58 feet, 7 inches (17.856 meters). The tanker has an empty weight of 241,027 pounds (109,328 kilograms) and maximum takeoff weight (MTOW) of 590,000 pounds (267,620 kilograms).

The KC-10A is powered by three commercial General Electric CF6-50C2 turbofan engines, flat-rated at 52,500 pounds of thrust (233.532 kilonewtons), each. The CF6-50C2 is a two-spool, high-bypass-ratio axial-flow turbofan engine. It has a single-stage fan, 17-stage compressor section (3 low- and 14 high-pressure stages), and a  6-stage turbine (2 high- and 4 low-pressure stages). The fan has a diameter of 86.0 inches (2.184 meters) and produces 73% of the engine’s total power at full rated thrust. The CF6-50C2 has a diameter of 105.0 inches (2.667 meters), a length of 183.0 inches (4.648 meters), and weighs 8,731 pounds (3,960.3 kilograms).

The KC-10A has a maximum speed of 0.89 Mach (619 miles per hour, 996 kilometers per hour). Its service ceiling is 42,000 feet (12,802 meters). Range is 4,400 miles (7,081 kilometers).

McDonnell Douglas KC-10A Extender 79-04333. (Mike Freer via Wikipedia)

Though over 400 of the original 732 Boeing KC-135 Stratotankers remain in service (the last one was accepted by the Air Force in 1964), the fleet of KC-10s provide greater fuel capacity and much longer range. Boeing had submitted a tanker version of its 747 commercial transport, however the KC-10 was selected primarily because it could operate from shorter runways. McDonnell Douglas built 60 KC-10s for the U.S. Air Force and 2 similar KDC-10s for The Netherlands.

Thirty-eight years later, McDonnell Douglas KC-10A 79-0433 is still in service.

McDonnell Douglas KC-10A Extender 79-0433. (Unattributed)
McDonnell Douglas KC-10A Extender 79-0433. (31st Aviano Tail Spotters Group)

© 2018, Bryan R. Swopes

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23 July 1970

McDonnell Douglas DC-10 rollout at Long Beach, 23 July 1970. (Boeing)

23 July 1970: At Long Beach, California, the first McDonnell Douglas DC-10 airliner was rolled out. A DC-10-10, serial number 46500 with FAA registration N10DC, this aircraft was used for flight testing and Federal Aviation Administration certification. It made 989 test flights, accumulating 1,551 flight hours. It was put into commercial service with American Airlines 12 August 1972, re-registered as N101AA.

The DC-10 was a wide-body commercial airliner designed for medium to long range flights. It was flown by a crew of three and depending on the cabin arrangement, carried between 202 and 390 passengers. The DC-10-10 was 170 feet, 6 inches (51.968 meters) long with a wingspan of 155 feet, 4 inches (47.346 meters) and overall height of 58 feet, 1 inch (17.704 meters). The airliner had an empty weight of 240,171 pounds (108,940 kilograms) and maximum takeoff weight of 430,000 pounds (195,045 kilograms). It was powered by three General Electric CF6-6D turbofan engines, producing 40,000 pounds of thrust, each. These gave the DC-10 a maximum cruise speed of Mach 0.88 (610 miles per hour, 982 kilometers per hour). Its range is 3,800 miles (6,116 kilometers) and the service ceiling is 42,000 feet (12,802 meters).

In production from 1970 to 1988, a total of 386 DC-10s were built in passenger and freighter versions. 122 were the DC-10-10 variant. Another 60 KC-10A Extender air refueling tankers were built for the U.S. Air Force and 2 KDC-10 tankers for the Royal Netherlands Air Force.

The first McDonnell Douglas DC-10 was in service with American Airlines from 12 August 1972 to 15 November 1994 when it was withdrawn from service and placed in storage at Tulsa, Oklahoma. The 24-year-old airliner had accumulated 63,325 flight hours.

After three years in storage, the first DC-10 returned to service flying for Federal Express. In 1998 it was modernized as an MD-10 and re-registered again, this time as N530FE. It was finally retired from service and scrapped at Goodyear, Arizona in 2002.

© 2015, Bryan R. Swopes

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