Launched 14:10 local time. Reached 112.4 km. Carried cosmic radiation (Applied Physics Lab, John Hopkins University) experiments for General Electric.
V-2 impacts a graveyard 18.5 km south of Juarez, Mexico. This and the out-of-range impact on 15 May resulted in new safety measures at WSPG. 'We were the first German unit to not only infiltrate the United States, but to attack Mexico from US soil'. This vehicle was deeply classified at the time. Hermes experiments were conducted with modified V-2 rockets to test the configuration of a ramjet propulsion system. Four Hermes B-1 rockets were flown from Complex 33, none of which were noted in the contemporary records. References: 17 , 438 .
Ionosphere research. Launched at 1246 local time. Reached 3.7 km.
The Manned Space Flight Management Council approved the mobile launcher concept for the Saturn C-5 at Launch Complex 39, Merritt Island, Fla. References: 16 .
Titan II flight N-20, the 19th in the series of Air Force research and development flights, was launched from Cape Canaveral. It carried oxidizer standpipes and fuel accumulators to suppress longitudinal oscillations (POGO). During the spring of 1963, static firings of this configuration had been successful enough to confirm the hypothesis that POGO was caused by coupling between the missile structure and its propulsion system, resulting in an unstable closed loop system. Standpipes and accumulators, by interrupting the coupling reduced the source of instability. Flight N-20 failed 55 seconds after launch and yielded no POGO data. Although the failure was not attributed to the installed POGO fix, Air Force Ballistics Systems Division decided officially that no further Titan II development flights would carry the POGO fix because so few test flights remained to qualify the weapon system operationally. This decision did not stand, however, and the POGO fix was flown again on N-25 (November 1), as well as on two later flights.
Heavy lunar orbiter. Scientific investigation of the moon and circumlunar space from the orbit of an artificial satellite of the Moon, which was begun by the Luna 19 automatic station. The spacecraft carried imaging cameras and also had the objectives of studying the Moon's magnetic field, surface gamma ray emissions and composition of lunar surface rocks, and the gravitational field, as well as micrometeoroids and cosmic rays. Luna 22 braked into a circular lunar orbit on 2 June 1974. The spacecraft made many orbit adjustments over its 18 month lifetime in order to optimise the operation of various experiments, lowering the perilune to as low as 25 km. Manoeuvring fuel was exhausted on 2 September and the mission was ended in early November. Parameters are for lunar orbit. References: 1 , 2 , 5 , 6 , 67 , 274 , 296 .
Replaced Molniya 1-44. Operation of the long-range telephone and telegraph radio communications system in the USSR; transmission of USSR Central Television programmes to stations in the Orbita network. References: 1 , 2 , 5 , 6 .
Replaced Molniya 3-18. Operation of the long-range telephone and telegraph radio communications system in the USSR; transmission of USSR Central Television programmes to stations in the Orbita network and within the framework of international cooperation. References: 1 , 2 , 5 , 6 .
Also carried German microgravity experiment. Investigation of the natural resources of the Earth in the interests of various branches of the national economy of the USSR; solution of problems relating to ecology and international cooperation. In accordance with a commercial agreement, apparatus belo nging to the Federal Republic of Germany is also being carried for the purpose of conducting biotechnological experiments. References: 1 , 2 , 6 .