On Mon, 16 May 2011 07:33:53 -0400, Olin Lathrop wrote: :: The problem is that air heats up as you compress it and cools when you :: allow the pressure to reduce. Which would bring us back to the idea of the steam powered car. Deutche=20 Welle TV motoring program featured a gentleman who has the last working=20 steam car in Germany. This is of course coal based, but I wonder if a more= =20 modern equivalent using either electric heating or a petroleum product with= =20 a more efficient boiler be viable. Viable meaning 20 - 30 mile round trip for town use, low fuel cost compared= =20 to 100% petroleum based car. Colin -- cdb, colin@btech-online.co.uk on 16/05/2011 =20 Web presence: www.btech-online.co.uk =20 =20 Hosted by: www.justhost.com.au =20 =20 =20 =20 =20 --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .