XPost: alt.home.repair, rec.autos.tech   
   From: rod.speed.aaa@gmail.com   
      
   On Fri, 20 Jan 2023 09:04:09 +1100, Scott Lurndal    
   wrote:   
      
   > =?UTF-8?B?TWlnaHR54pyFIFdhbm5hYmXinIU=?= <@.> writes:   
   >> Rod Speed wrote on 1/19/2023 3:41 PM:   
   >>> David Lesher  wrote   
   >>>   
   >>>> You want the spark when disconnecting to be AWAY from the   
   >>>> rapidly charging battery.   
   >>>   
   >>> There is no hydrogen when the once flat battery   
   >>> is being charged once the engine has started.   
   >>>   
   >>>> So: Run the negative from frame to frame,   
   >>>> and disconnect at the rescue car first.   
   >>   
   >>   
   >> I real life scenario there is no danger of hydrogen accumulation under   
   >> the hood because it is too airy inside the engine compartment.   
   >>   
   >> There will be danger of hydrogen accumulation if the lead-acid battery   
   >> is confined inside a box, like underneath a motorized wheelchair.   
   >   
   > Then why do space launch vehicles use burners to ensure that any H2   
   > that pools around the launch site is burned off before launch?   
      
   Because you get FAR more gaseous hydrogen in that situation.   
      
   > Far more "airy" environment than any automobile engine compartment.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)