Bell flight 7. Longitudinal and directional stability investigation. At Pinecastle AAF, Florida.

Bell flight 6. Static directional stability investigation. At Pinecastle AAF, Florida.

The Navaho was redefined by the customer in a revised three-phase program using a rocket booster and ramjet cruise. Track, air, and vertical pad launch were to be studied. The first phase would produce a missile with a range of 1600 km while carrying a 1350 kg warhead. Phase two would produce a missile that could carry a 1350 kg warhead to a 3200 to 4800 km range. Phase 3 would be the intercontinental version, carrying a 4500 kg nuclear warhead to an 8000 km range.

The group was selected to provide pilot astronauts for the Vostok manned spaceflight program.. Qualifications: Military jet aircraft pilots under 30 years of age; under 170 cm tall; under 70 kg in weight.. While the Americans sought mature test pilots for their first spaceflights, the Soviets recruited young pilots with the intent of training them for a career as spacemen. There were 3,000 applicants following interviews with medical doctor teams that toured Soviet air bases beginning in August 1959. 102 were called for physical and psychological tests. 8 of these were selected, but then Chief Designer Korolev said he wanted a pool three times larger than the American Mercury cadre. Of the 20 selected, 12 would fly in space. Of the 8 that did not, 1 died in a ground fire in training; 3 were dismissed for disciplinary reasons; and 4 left following injuries in training.

First test launch of Army's Pershing tactical missile from Cape Canaveral.

McDonnell conducted a successful drop test, using a boilerplate spacecraft fitted with impact skirt, straps and cables, and a beryllium heat shield. During the tests the stainless steel straps were successfully stretched to design limits.

Factory roll-out inspection of Atlas launch vehicle 107-D, designated for the Mercury-Atlas 7 (MA-7) manned orbital mission, was conducted at Convair.

KH-7 type satellite. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A).

MSC and the David Clark Company reached an agreement on a contract for Apollo Block I space suits. The first suits, expected by July 1, would go to North American for testing.

Tank fabrication had begun in May 1964. Martin-Baltimore recleaned and purged the tanks with nitrogen by April 20, 1965. In the meantime, flight engines for GLV-7 arrived from Aerojet-General on April 17. Tank splicing was completed May 6 and engine installation May 20. All horizontal testing was completed June 14. A modification period followed.

KH-4A. Capping shutter malfunction occurred during last 5 passes of mission.

Mars flyby 31 July 1969; returned 75 images of Martian surface. Ten days before the scheduled launch, a faulty switch opened the main valves on the Atlas stage. This released the pressure which supported the Atlas structure, and as the booster deflated it began to crumple. Two ground crewman started pressurizing pumps, saving the structure from further collapse. The two ground crewman, who had acted at risk of the 12-story rocket collapsing on them, were awarded Exceptional Bravery Medals from NASA.

The Mariner 6 spacecraft was removed, put on another Atlas/Centaur, and launched on schedule. The main booster was jettisoned 4 min. 38 sec. after launch, followed by a 7.5 minute Centaur burn to inject the spacecraft into Mars direct trajectory. After Mariner 6 separated from the Centaur the solar panels were deployed. A midcourse correction involving a 5.35 second burn of the hydrazine rocket occurred on 1 March 1969. A few days later explosive valves were deployed to unlatch the scan platform. Some bright particles released during the explosion distracted the Canopus sensor, and attitude lock was lost temporarily. It was decided to place the spacecraft on inertial guidance for the Mars flyby to prevent a similar occurrence.

On 29 July, 50 hours before closest approach, the scan platform was pointed to Mars and the scientific instruments turned on. Imaging of Mars began 2 hours later. For the next 41 hours, 49 approach images (plus a 50th fractional image) of Mars were taken through the narrow-angle camera. At 05:03 UT on 31 July the near-encounter phase began, including collection of 26 close-up images. Due to a cooling system failure, channel 1 of the IR spectrometer did not cool sufficiently to allow measurements from 6 to 14 micrometers so no infrared data were obtained over this range. Closest approach occurred at 05:19:07 UT at a distance of 3431 km from the martian surface. Eleven minutes later Mariner 6 passed behind Mars and reappeared after 25 minutes. X-band occultation data were taken during the entrance and exit phases. Science and imaging data were played back and transmitted over the next few days. The spacecraft was then returned to cruise mode which included engineering and communications tests, star photography TV tests, and UV scans of the Milky Way and an area containing comet 1969-B. Periodic tracking of the spacecraft in its heliocentric orbit was also done.

Science Results

Mariner 6 returned 49 far encounter and 26 near encounter images of Mars. Close-ups from the near encounter phases covered 20% of the surface. The spacecraft instruments measured UV and IR emissions and radio refractivity of the Martian atmosphere. Images showed the surface of Mars to be very different from that of the Moon, in some contrast to the results from Mariner 4. The south polar cap was identified as being composed predominantly of carbon dioxide. Atmospheric surface pressure was estimated at between 6 and 7 mb. Radio science refined estimates of the mass, radius and shape of Mars.

Area survey photo reconnaissance satellite.

Meeting with Mishin. It is clear that he wanted to continue with the original plan for a dual Soyuz flight in August. It was Afanasyev and Kerimov who were pushing for a single long-duration flight in May. There is no action by the Ministry of Defence to provide rational decision making in regard to manned spaceflight.

ASAT interceptor. Intercept and destruction of target successful on second orbit.

Military navigation satellite.

Conduct third inert captive flight, Edwards (2 hours, 28 minutes), Enterprise (OV-101)

Soyuz 24 landed at 09:38 GMT, 37 km NE pf Arkalyk.

Manned two crew. Docked with Salyut 6. Transported a team consisting of V A Lyakhov and V V Ryumin to the Salyut-6 space station to conduct scientific investigations and experiments and repair work. Recovered June 15, 1979 16:18 GMT. Returned unmanned.

High resolution photo reconnaissance; returned film in two small SpK capsules during the mission and with the main capsule at completion of the mission.

Time 19 minutes.

Test from shuttle of 20 km long tether; satellite unintentionally deployed when tether broke. Re-entered March 19.

The solid engine used on the third stage of the Kaituozhe 1 launch vehicle performed its first ground test firing. The test was successful and all parameters meet design specifications.

The optical reconnaissance satellite carried two small film capsules and a large reentry module. The main recoverable section of Cosmos 2387 landed at about 0230 UTC on June 27.