This consisted of ten proving-stand tests for the development of a more powerful motor, 10 in. in diameter. Weight of rocket, about 225 lb; weight of fuels, 50-70 lb for the series. References: 482 .
D-558-II Skyrocket exceeded the speed of sound at Edwards AFB, Calif. It was powered by both a Westinghouse J-34 turbojet engine and a Reaction Motors, Inc. rocket motor. References: 17 .
First hydrogen-fluorine rocket engine successfully operated at NACA Lewis Laboratory, demonstrating a 40-percent performance improvement over other propellant combinations. References: 17 .
President Kennedy shot and killed by sniper in Dallas, Tex. Lyndon B. Johnson becomes President same day
Second attempted circumlunar flight. Four seconds after second stage ignition the booster went out of control. The launch escape system shut down the engines and the escape tower pulled the spacecraft away from the booster. The Proton crashed 300 km from the pad and the Soyuz was recovered 80 km southwest of Dzhezkazgan. References: 5 , 67 , 274 .
Polar ionosphere investigations. Seventh ESRO satellite. Mass 115 kg. Also registered by the United States as 1972-92A, in A/AC.105/INF.267, with orbital parameters 98.8 min, 244 x 1160 km x 91.1 deg, category B. References: 1 , 2 , 5 , 6 .
Repaired antenna. Replaced solar camera film cartridges. References: 66 .
BONUM-1 provided domestic Russian television service for Media Most, a Moscow media enterprise, broadcasting 50 channels to western Russia from a geostationary orbit at 36 degrees E. Mass was 1426 kg at launch, 800 kg of that propellant. BONUM-1 carried 8 Ku-band transponders. The Delta upper stage raised the initial 157 km x 189 km at 29.2 degree parking orbit to 159 km x 1304 km and then 1228 km x 1683 km at 26.7 degrees. A Thiokol Star 48B solid third stage boosted BONUM-1 to a 1285 x 36703 km x 19.5 degree geostationary transfer orbit, with the Thiokol Star 30 apogee kick motor placing the satellite in its final geostationary orbit. After separation of the spacecraft, the Delta made a final depletion burn to lower its orbit to 274 km x 1552 km x 25.6 degree to ensure it would quickly decay and burn up in the atmosphere. Geostationary at 35.9 degrees E.
Additional launches into Globalstar communications satellite constellation.