MikeJ
Member
Now, mind you, an air-cooled to water-cooled engine conversion has been done. Lycoming Corporation makes air-cooled aircraft engines up one side and down the other. But they do offer a water-cooled version. (Just search for water-cooled Lycoming engines.) One of their engines was used to power the Voyager aircraft to around the world record in 1986. The aircraft had both an air-cooled and water-cooled engine. Richard Rutan (can't post his common nickname here), the pilot most of the way, shut off the air-cooled engine to save fuel for the around-the-world flight. The Lycoming site tells of the modifications made to the air-cooled engine for the water-cooled.
A pressurized cooling system allows the coolant temperature to exceed normal boiling point. A cold engine is very inefficient, as pointed out earlier. Race car engines run pretty hot to squeeze out the horsepower. Grandma's grocery getter? If the thermostat exceeds 180F, I'd be surprised.
In thermodynamics, a theory is that the hotter you can run an engine (before the lubricant breaks down and bearings melt down), the more efficient the engine runs. A mercury-cooled engine running at 500F is a lot more efficient than what we have today in pressurized water-based cooled engines. (Somehow, running around with 200 pounds of mercury in your cooling system would not set well with the EPA folks.)
If you pursue this engineering endeavor, keep us posted. I'm confident it can be done. If not too costly, you will have a whole new engine when you get finished.
A pressurized cooling system allows the coolant temperature to exceed normal boiling point. A cold engine is very inefficient, as pointed out earlier. Race car engines run pretty hot to squeeze out the horsepower. Grandma's grocery getter? If the thermostat exceeds 180F, I'd be surprised.
In thermodynamics, a theory is that the hotter you can run an engine (before the lubricant breaks down and bearings melt down), the more efficient the engine runs. A mercury-cooled engine running at 500F is a lot more efficient than what we have today in pressurized water-based cooled engines. (Somehow, running around with 200 pounds of mercury in your cooling system would not set well with the EPA folks.)
If you pursue this engineering endeavor, keep us posted. I'm confident it can be done. If not too costly, you will have a whole new engine when you get finished.