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Re: Heavy flywheel (archive)

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Posted by rk on February 03, 2001 at 08:41:08:

In Reply to: Heavy flywheel has more potential energy due to wt posted by (m) -Texas M3/4 on February 02, 2001 at 18:32:17:


While it is true that the heavier fw has more energy when spinning (kinetic) the only thing effected is the change in rpm. If you intend to coast up a hill then the heavier fw helps and will transfer more energy to forward motion. If you are driving at a constant speed (independant of the gear) and maintain that speed the wt of the flywheel has no effect on anything. Momentum is related to rpm, acceleration is the time rate of change of velociy in this case the only thing that matters is how fast the rpms change. Therefore in lower gears when rpms change thousnds per second there is more torque available for accelerations and in higher gears very little difference. Roughly 30lb-ft extra in first and less than 1 in 5th.

((This is a over-generalization))
If you are at a constant speed both flywheels are turning the same rpm. Lets say the stocker weighs 24lbs and the ltw weighs 12lbs.



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