After the final successful L series flight of August 9, with pressure feed, Goddard turned again to the problem of fuel pumps, which he believed were imperative if very high altitudes were to be attained. This ultimately resulted in the P Series of Tests, which ran from October 17, 1938-October 10, 1941. The work began in the fall of 1938, when he made a thorough study, through more than twenty proving-stand tests, of five models of small, high-speed centrifugal pumps, which had several radically new features. References: 482 .
Temperature, winds research. Launched at 2130 local time. Reached 85.6 km.
lonosphere research. Launched at 1117 local time. Reached 114..3 km.
Project Mercury weather support group established at NASA's request in the Office of Meteorological Research of the Weather Bureau. References: 17 .
MSC and International Business Machines Corporation (IBM) negotiated a $1,500,000 fixed-price contract for the Apollo guidance and navigation system backup computer. References: 16 .
NASA Hq. informed MSC that NASA Deputy Administrator Robert C. Seamans, Jr., had approved the project approval document authorizing four additional CSMs beyond No. 115A. MSC was requested to proceed with all necessary procurement actions required to maintain production capability in support of projected schedules for these items. References: 16 .
Two NASA investigation boards had reported that loss of attitude control caused the May 6 accident that destroyed lunar landing research vehicle No. 1, NASA announced. Helium in propellant tanks had been depleted earlier than normal, dropping pressure needed to force hydrogen peroxide propellant to the attitude-control lift rockets and thrusters. Additional Details: Loss of attitude control caused Apollo LLRV Crash. References: 16 .
Space shuttle main engine first main stage test at NSTL References: 15 .
Replaced Molniya 3-12. 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 .
Unmanned resupply vessel to Mir. First attempted to dock with Mir on 19 October 1991. The docking was automatically aborted at a distance of 150 m from the station. Successfully docked with the forward port of Mir on on 21 Oct 1991 03:40:50 GMT. Unloading began next day. Undocked on 20 Jan 1992 07:13:44 GMT. Destroyed in reentry on 20 Jan 1992 12:03:30 GMT. Total free-flight time 4.35 days. Total docked time 91.15 days. References: 1 , 2 , 6 , 275 .
The astronauts installed two 58 kg DDCU DC-to-DC converter units atop the International Space Station's Z1 Truss. The DDCUs, will convert electricity generated by the solar arrays to be attached during the next shuttle mission. The spacewalkers also completed power cable connections on both the Z1 truss and newly installed docking port, PMA-3. They connected and reconfigured cables to route power from Pressurised Mating Adapter-2 to PMA-3 for the arrival of Endeavour and the STS-97 crew next month. They also attached a second tool storage box on the Z1 truss, providing a place to hold the tools and spacewalking aids for future assembly flights. McArthur stocked the boxes with tools and hardware that had been attached to the Unity module. STS-96 Astronauts Tammy Jernigan and Dan Barry had left the tools on the outside of Unity during a May 1999 spacewalk.