[Christ]

Originally Posted by Frank Lee

It's good to think about and investigate stuff even if it doesn't pan out right away. Who knows when down the road the lessons find application?

Frinstance it could be someone comes up with a thermosiphon system that's good enough for hypermilers.

Which would certainly kick ass, but probably would not be using water under pressure. I think it would be using something akin to refrigerant, maybe ammonia or propane? (I've used propane to recharge a car's A/C system... it never gets hot enough in there to reach the auto-ignition temp, and even if it did, other components would fail, causing it to vent to atmosphere long before it was able to ignite.)