GT40s.com - View Single Post

Kevin M · 03-18-04, 08:42 PM

Remember, the rotational inertia is relative to the diameter. The smaller the diameter the less effect it has. When you look at the total rotational inertia of the whole system, the crank is pretty minor. You have the flywheel & clutch (much larger diameter), 4 large iron brake disks, 4 wheels (at 20 to 25 lbs. each and very large diameter), 4 tires, etc. A change of 25% in the crank might only be 1% to 2% of the total.

Kevin

03-18-04, 08:42 PM	#25 (permalink)
Kevin M kmcgowen 2 Tenths Join Date: Nov 2003 Posts: 246 Rep Power: 8	Re: 306 vs 342 Remember, the rotational inertia is relative to the diameter. The smaller the diameter the less effect it has. When you look at the total rotational inertia of the whole system, the crank is pretty minor. You have the flywheel & clutch (much larger diameter), 4 large iron brake disks, 4 wheels (at 20 to 25 lbs. each and very large diameter), 4 tires, etc. A change of 25% in the crank might only be 1% to 2% of the total. Kevin