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Engineering
Mechanical Engineering
Using Fuel as a Combustion Engine Coolant?
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[QUOTE="jrmichler, post: 6133377, member: 638574"] [USER=612483]@Delta Force[/USER], good so far. Next step: You have 45 pounds per hour of gasoline flowing from the tank at 72 deg F, then heated to 190 deg F in the engine. The heat to do that is 45 lbs/hr X 118 deg F X 0.53 BTU/(lb-deg F) = 2810 BTU/hr. Check the units, you will see that they balance. Result: The engine is sending 289,000 BTU/hr to the water jacket, and the fuel could theoretically absorb 2810 BTU/hr, or 1%. Most piston aircraft engines are air cooled. A rough rule of thumb is that cooling drag (power required to force air over the engine) is about 10% of engine horsepower. Here is a good link to a person who studied the cooling drag on his homebuilt airplane: [URL]http://www.n91cz.net/Interesting_Technical_Reports/106-111_BuildingBasics.pdf[/URL]. Good search terms for further information are [B]aircraft cooling drag[/B]. [/QUOTE]
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Forums
Engineering
Mechanical Engineering
Using Fuel as a Combustion Engine Coolant?
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