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| .p10 Orion heat shield is PICA, phenolic impregnated carbon ablator, a matrix of carbon fibers embedded in a phenolic resin. Outer surface burns off and carries off heat, charred remainder is heat resistant. Used for 13km/s re-entry of Stardust spacecraft in 2006. Segmented. | === Orion === .p10 [[https://en.wikipedia.org/wiki/Orion_(spacecraft) | Orion ]] heat shield is PICA, phenolic impregnated carbon ablator, a matrix of carbon fibers embedded in a phenolic resin. Outer surface burns off and carries off heat, charred remainder is heat resistant. Used for 13km/s re-entry of Stardust spacecraft in 2006. Segmented. . not true, will use [[ https://www.nasa.gov/centers/ames/news/releases/2009/09-39AR.html | Textron Avcoat ]] like Apollo |
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| . Not true anymore. Wikipedia sez 2023 crew launch, maybe. Water landings only. | |
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| .p15 CM+SM+Escape < 50,250 pounds approx 23 tonnes | .p15 CM+SM+Escape < 50,250 pounds approx 23 tonnes (now 25,848 kg, 56,985 lb) ------ |
The Next Space Age
2008 ed. Christopher Mari BVT 629.4011 NEX
Reprinted magazine and newspaper articles, 2003 to 2008
Dated, many of the programs described delayed or cancelled.
Orion
p10 Orion heat shield is PICA, phenolic impregnated carbon ablator, a matrix of carbon fibers embedded in a phenolic resin. Outer surface burns off and carries off heat, charred remainder is heat resistant. Used for 13km/s re-entry of Stardust spacecraft in 2006. Segmented.
not true, will use Textron Avcoat like Apollo
- p11 Orion uses parachutes, jettisons heat shield, may land with airbags after 8m/s descent.
- hmm - a = v²/2d, wag d=1 meter, a = 32 m/s² or 2 gees.
- Not true anymore. Wikipedia sez 2023 crew launch, maybe. Water landings only.
- p14 Orion: small team at Lockheed Martin, what did Apollo do?
p15 CM+SM+Escape < 50,250 pounds approx 23 tonnes (now 25,848 kg, 56,985 lb)
- p21 Shackleton Crater south pole, 80% sunlight over year
- p22 regolith compacted digging difficult, abrades bearings
- p23 Heat surface with microwaves, glass and metallic iron, 50W/cm³ to 1700C in 10 seconds
- 1990s, Lawrence Taylor U. Tenn., 1 centimeter deep (thermal conductivity?) 5 MJ/m²
- p24 Larry Clark Lockheed Martin - oxygen from regolith iron oxides, 1300 to 1500℉
- p104 Phoenix lander, Mars north pole finds ice June 2008
- p119 Deep Space Network, 5e-5 m/s velocity and 3 m range
- p119 Cassini camera three microradians
- p122 RTG Pu238 halflife 88y, April 2001 Pioneer 10 1e-21 watt (per what?)
- p126 acceleration anomaly (since solved, heat reflections off antenna)
- p135 exoplanets ... really old stuff, pre-Kepler