On 7/14/2011 11:24 AM, Rick Jones wrote:
http://www.reactionengines.co.uk/sabre.html suggests they are not
actually liquefying the air, only taking it down to the vapor boundary
(whatever that is
. They present this as a difference from previous
"LACE" efforts. How much that really chances things I cannot say.
I still want to know where the nitrogen in the air goes to.
Pat