Leon wrote in news: snipped-for-privacy@giganews.com:
Well, it's actually not. The source is the combustion chamber inside the engine. The air blowing back from the radiator is hitting the outside of the engine, seperated from the source by the engine block and water jacket. And, in practice of course most of the air goes under the vehicle anyway.
Simple - no oxygen. As long as the tank is full of gas vapors, it's not full of air.
Well, we're kind of looking at two different things there. One is the ability of the radiator to extract heat from the engine. Passenger car radiators aren't big enough to extract all the heat produced at full power.
The other is the ability of the radiator to reject heat to the atmosphere. That is very dependent on the speed of the air moving thru the radiator, and if there's no air movement it's close to zero heat rejection. Hence the fan to produce air movement while the vehicle is stationary.
Not so at all. A sport bike engine is much more enclosed in the bodywork than an automobile engine. It's different, of course, if you're talking about a Harley or other bike with no bodywork.
Well, any engine putting out a given horsepower is working just as hard as any other engine putting out the same horsepower. That's inherent in the definition of power. But I'll grant you that at idle, a car engine is working harder than a bike engine is.
John