NACA flight 29. Spanwise pressure distribution, stability and control. Rolls, pull-ups, check of stabilizer effectiveness. Mach 0.91. Number 2 cylinder failed to fire. References: 49 , 97 .

Decree 'On approval of work on the R-11A missile for the IGY' was issued. References: 474 .

NACA flight 10. Aborted after launch, indication of open landing-gear door. Propellants jettisoned, completed as a glide flight. References: 49 , 97 .

Navaho ramjet intercontinental missile program canceled by Air Force. References: 17 .

NASA selected Hughes, North American, Space Technology Laboratory, and McDonnell to study designs for the first lunar soft-landing spacecraft. References: 17 .

NASA announced that a complete F-1 engine had begun a series of static test firings at Edwards Rocket Test Center, Calif. References: 18 , 27 .

NASA officials announced the basic decision for the manned lunar exploration program that Project Apollo shall proceed using the lunar orbit rendezvous as the prime mission mode. Based on more than a year of intensive study, this decision for the lunar orbit rendezvous (LOR), rather than for the alternative direct ascent or earth orbit rendezvous modes, enables immediate planning, research and development, procurement, and testing programs for the next phase of space exploration to proceed on a firm basis. References: 483 .

Following a long controversy NASA selected Lunar Orbit Rendezvous (LOR) as the fastest, cheapest, and safest mode to accomplish the Apollo mission. LOR solved the engineering problem of how to land. The EOR or Direct Landing approaches required the Apollo crew to be on their backs during the landing and having to use television or mirrors to see the lunar surface. A lunar crasher stage approach had finally emerged as lesser of evils but raised other issues. LOR allowed a purpose-built lander with a logical helicopter-like crew station layout. Studies indicated LOR would allow landing 6-8 months earlier and cost $9.2 billion vs $ 10.6 billion for EOR or direct. Direct flight by this time would not involve Nova, but a scaled-down two-man spacecraft that could be launched by the Saturn C-5. Additional Details: Selection of LOR as Apollo Mission Mode. References: 26 , 27 .

Studied outer Van Allen belt. Electron 3 and 4 launched by a single carrier rocket. Simultaneous study of the inner and outer radiation belts of the earth, cosmic rays and the upper atmosphere. References: 1 , 2 , 5 , 6 .

Studied inner Van Allen belt. Electron 3 and 4 launched by a single carrier rocket. Simultaneous study of the inner and outer radiation belts of the earth, cosmic rays and the upper atmosphere. References: 1 , 2 , 5 , 6 .

An RCS oxidizer tank failed during a test to demonstrate propellant compatibility with titanium tanks. This was the first of seven tanks to fail from a group of ten tanks put into test to investigate a failure that occurred during February 1965. These results caused an intensive investigation to be undertaken. References: 16 .

Studied relationship between atmospheric density and solar radiation. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). References: 1 , 2 , 5 , 6 , 278 .

Ionospheric drag tests. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). References: 1 , 2 , 5 , 6 , 278 .

Continued operation of the long-range telephone and telegraph radio-communication system within the Soviet Union and transmission of USSR central television programmes to stations in the Orbita and participating international networks (international coope ration scheme). References: 1 , 2 , 5 , 6 .

Acquisition of meteorological information needed for use by the weather service. References: 1 , 2 , 5 , 6 .

Replaced Cosmos 924. Possible ELINT satellite. References: 1 , 2 , 5 , 6 .

Spacecraft mission was research in the field of high-energy (gamma/x-ray) astrophysics conducted jointly with France and Poland. The satellite was based on the Soyuz manned spacecraft and had an extremely long gestation - conceived in 1965, authorised in 1976, scheduled originally for launch in 1984, but further severe technical delays resulted in a 1990 launch. References: 1 , 2 , 6 .

Clark was selected in the NASA SSTI (Small Spacecraft Technology Initiative) program, along with Lewis, to demonstrate advanced spacecraft technologies.

Lewis was selected in the NASA SSTI (Small Spacecraft Technology Initiative) program, along with Clark, to demonstrate advanced spacecraft technologies.