From: nospam@127.0.0.1   
      
   On 2020-06-30 10:38 AM, David Spain wrote:   
   > I vaguely remember that for Apollo at least the O2 was kept in some kind   
   > of solid/liquid slurry. Kinda of like an Oxygen slushy. And hence the   
   > need to do "cryostirs" that led to the explosive disaster on Apollo 13   
      
   Okay first correction, after a quick review, not solid/liquid but   
   liquid/gas slurry. A "supercritical fluid". "Fans" (agitators?) were   
   used to stir. Arcing between exposed wires with melted Teflon(tm)   
   insulation inside the O2 tanks in the Service Module triggered the   
   explosion on Apollo 13. You can do a quick Google search to learn all   
   the details about where Gunter Wendt. :-)   
      
   The Apollo CM/SM/LM was put in a slow roll about its local X-axis which   
   was oriented perpendicular to the flight path both on outbound and   
   inbound legs of the trans lunar journey to distribute the heat from the   
   Sun evenly throughout the spacecrafts. Attitude adjustments were made as   
   necessary for orientation purposes during the flight. The local X-axis   
   (by local I mean relative to the vehicle) was a line that ran straight   
   from the center of the engine bell of the SM right though the   
   center-line of the CM and LM out to the LM Decent Engine nozzle. There   
   was some Apollo dialect that referred to points along the X axis   
   differently if you were in a CM centric view of that line vs LM.   
      
   > https://space.stackexchange.com/questions/21994/did-the-combin   
   d-command-and-service-module-and-lunar-module-perform-another-180   
      
   Dave   
      
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