XPost: sci.space.science   
   From: henry@spsystems.net   
      
   In article ,   
   hop  wrote:   
   >> The vacuum is not an issue. Temperature and lubrication   
   >> might be...   
   >   
   >Somewhere, someone knows the answer to that. The soviets are reported   
   >to have launched and test fired a 23 or 30mm aircraft cannon on salyut 3...   
      
   The way you deal with temperature is to control it -- wrap the thing in   
   thermal blankets and supply electric heat to keep it warm.  (If you're   
   planning to fire it intensively, *then* you have to think about cooling,   
   mind you...)   
      
   Lubrication simply requires a change of lubricants.  There *are*   
   vacuum-compatible lubricants.   
   --   
   "Think outside the box -- the box isn't our friend."    |   Henry Spencer   
                                   -- George Herbert       | henry@spsystems.net   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)