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aschen aschen is offline
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Join Date: May 2003
Location: Woodlands TX
Posts: 2,648
polar moment of inertia is best thought of like this:

Imagine you have a 2 blade propeller that weights nothing. If you put 10 lbs on the tip of each blade, it will be harder to bring up to speed (and slow down rpm) than if you put a 20 lb weight in the center.

The polar moment is the resistance of a car to yaw. Less is not neccicarily better. A low polar moment can be part of the reson why some mid engined cars "spin like a top" when they break away. Cars of the same weight with a more moderate moment are more easily "throttle steerable". In general a car should like to turn an a low polar moment is a means to that end but .
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Old 10-05-2010, 09:09 AM
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