3 June 1973: While maneuvering at low altitude at the Paris Air Show, the first production Tupolev Tu-144S, CCCP-77102, Aeroflot’s new Mach 2+ supersonic airliner, broke apart in midair and crashed into a residential area. All six crew members and eight people on the ground died. Another 25 were injured.
The Tu-144 was built by Tupolev OKB at the Voronezh Aviation Plant (VASO), Pridacha Airport, Voronezh. It was a large delta-winged aircraft with a “droop” nose for improved low speed cockpit visibility and retractable canards mounted high on the fuselage behind the cockpit. It was flown by a crew of 3 and was designed to carry up to 140 passengers.
77106 is 65.50 meters (215 feet, 6.6 inches) long, with a wingspan of 28.00 meters (91 feet, 10.4 inches). The tip of the vertical fin was 11.45 meters (37 feet, 6.8 inches) high. The 144S has a total wing are of 503 square meters (5,414 square feet). Its empty weight is 91,800 kilograms (202,384 pounds) and the maximum takeoff weight is 195,000 kilograms (429,901 pounds). (A number of Tu-144S airliners had extended wing tips, increasing the span to 28.80 meters (94 feet, 5.9 inches) and the wing area to 507 square meters (5,457 square feet).
The Tu-144S was powered by four Kuznetsov NK-144A engines. The NK-144 is a two-spool axial-flow turbofan engine with afterburner. It uses a 2-stage fan section, 14 stage compressor section (11 high- and 3 low-pressure stages), and a 3-stage turbine (1 high- and 2 low-pressure stages). It is rated at 147.0 kilonewtons (33,047 pounds of thrust) for supersonic cruise, and 178.0 kilonewtons (40,016 pounds of thrust) with afterburner for takeoff. The NK-144A is 5.200 meters (17 feet, 0.7 inches) long, 1.500 meters (4 feet, 11.1 inches) in diameter and weighs 2,827 kilograms (6,233 pounds).
The 144S has a cruise speed of Mach 2.07 (2,200 kilometers per hour/1,367 miles per hour) with a maximum speed of Mach 2.35 (2,500 kilometers per hour/1,553 miles per hour). The service ceiling is approximately 20,000 meters (65,617 feet). Its practical range is 3,080 kilometers (1,914 miles).
In actual commercial service, the Tu-144 was extremely unreliable. It was withdrawn from service after a total of just 102 commercial flights, including 55 passenger flights.
The cause of the accident is not known, other than the obvious structural failure, but there is speculation that the Tu-144 was trying to avoid another airplane.
© 2016, Bryan R. Swopesby