On Sun, 09 Sep 2007 02:19:17 +0000, Larry wrote:

wrote in news7f6e352nobhftlvbnrfrja65nvtgv8e5b@
4ax.com:

if it were practical internal combustion engines would be
running at much higher temperatures then they do now. I suspect that
higher temperature operation would be getting into the realm of exotic
materials, difference in expansions of various engine parts, etc. I
also suspect that lubrication would be a problem.

Remember the ceramic diesel invented that had no cooling system and no
lube oil?
http://www.patentstorm.us/patents/4846051-claims.html

Lubrication was by GAS, not liquid.

It was too efficient, of course, so it had to be BURIED.

Ever wonder why boats don't have air cycle refridgeration and air
conditioning?
http://www.patentstorm.us/patents/4846051-claims.html
-75F is plenty cool to cool off the cabin, right?
1967, Chrysler sedan in Mohave Desert with 6 engineers inside enjoying a
ROVAC rotart compressor/expander air conditioning system running on AIR,
not freon. Temp with 6 passengers in a Plymouth? 57F....cool plenty!
Oops...too environmentally friendly. You can't charge $8 for 12oz of AIR
at WalMart like R134a. Can it! Quick!


Larry


Gas or air lubrication is hardly news. My Machinery's Handbook of
1950-something had tables of clearance for air lubed bearings.

As I remember it the ceramic engine never got out of the laboratory
stages but I do remember some pretty high efficiency numbers claimed
for it.

A charge of freon for the pickup is about $4.00 here :-)


I
Bruce in Bangkok
(brucepaigeATgmailDOTcom)