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Thrust vector control on the Titan solid rocket motors was accomplished by fluid injection rather than gimbaling the nozzles. Nitrogen tetroxide oxidizer was injected into ports around the circumference of the nozzle to alter the direction of the exhaust and control the vehicle. The red tank contained the nitrogen tetroxide propellant used in this thrust ...


14

It is a tap to measure Chamber Pressure You can see similar tubes protruding from other hydrazine engines designed by Rocket Research Corp. Per the source: "A 1/16-inch OD x 0.010-inch wall tube is provided to measure thrust chamber pressure". This reading could've been used as a measure of engine thrust for throttle control feedback loops. I ...


6

It seems pretty likely that it is still in orbit. MRO is in an orbit of about 370-400 km, which is quite low, but still doesn't use significant fuel to keep it up. 250 km is considered too high for aerobraking. Almost certainly Viking 2 is still orbiting Mars, probably in a similar orbit to what was last known. The only real question is if sunlight pushed it ...


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From Viking '75 Spacecraft Design and Test Summary Volume 1: Lander Design page 76


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The Search for Life on Mars (Christopher P. Mckay, 1996) quotes Klein, H. P.: 1978, Icarus 34, 666–674. Klein, H. P.: 1979, Rev. Geophys. Space Phys. 17, 1655–1662. Horowitz, N. H.: 1986, To Utopia and Back: The Search for Life in the Solar System, W. Also by Mckay: 4 .McKay C. P. et al. 1998. The Mars Oxidant experiment (MOx) for Mars '96. Planet. ...


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Viking Orbiter "violet-light" picture 34A13, it shows the region east and northeast of the Argyre basin during winter in the southern hemisphere. (a) Most of the snow-covered Argyre basin is shown. This was taken just after the winter solstice when solar heating was minimal. Further down it says the location is 47° S, 22° W I found it in NASA-SP-441 ...


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The real short version is that Horizons is maintained by a single person who has other assignments at NASA, and only adds missions as they are requested by the public, or newly launched. Older missions that were still active ~20 years ago. There are archives where this older data can be pulled, just not web based. There are some other reasons for this. One ...


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Note that you're mixing up the lander's "retro-rockets" and the special motors fitted for the tests. The special motors are different from the retro-rockets used by the real landers to touch down on Mars. They were "boost motors" provided solely to put the test vehicle in the proper altitude and speed conditions for the parachute deployment tests. The BLDT ...


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