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## RE: Lightweight wheels...drive only?

 To: "Eric Buckley" RE: Lightweight wheels...drive only? "Kevin Stevens" Sat, 29 Jul 2000 23:16:22 -0700
 ```And yes, I intended for that to go to the list. ;) KeS > -----Original Message----- > From: owner-autox@autox.team.net [mailto:owner-autox@autox.team.net]On > Behalf Of Kevin Stevens > Sent: Saturday, July 29, 2000 23:09 > To: Eric Buckley > Cc: Ax List (E-mail) > Subject: RE: Lightweight wheels...drive only? > > > > > God, will someone take the slide rules away from these guys before they hurt > themselves? > > KeS > > > Eric, > > > > You made some good points. It will require more energy to "spin up" the > > non drive wheels than the drive wheels due to inefficiencies. As you > > said, the flexing of the body won't be significant unless your driving a > > Mustang without subframe connectors. > > > > Additional inefficiencies will come from the deformation of the tires. > > For the sake of this discussion lets consider the drive axle the source > > of the energy, and all 4 tires/wheels are the same weight and size. > > Consider only the portion of energy needed spin the tires/wheels from 0 > > to 60 mph, the simple analysis says energy to "spin up" 4 tires/wheels > > will be 4 times the energy to spin up one tire/wheel. I'm sure someone > > can look up an equation for stored energy in a flywheel (tire/wheel). > > The drive wheels are driven directly from the axle so there won't be any > > inefficiencies for the drive wheels. The other wheels will get their > > energy from the drive wheels, thru the inefficiencies of the drive > > tires, and thru the inefficiencies of the non drive tires. The > > associated rolling resistances will manifest itself as heat (lost > > energy) in the tires. > > > > I would now conclude that the lighter wheels should be put on the non > > drive end if all you're interested in is acceleration. > > > > Bob Mosso > > > > > > ```
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