Re: [EVDL] EVLN: Venturi, OSU VBB-3 Electric Racer targets 372mph record 0-60mph:2s

2016-02-11 Thread Bill Dube via EV
2) It removes a thin layer of aged hard rubber, and reveals fresh soft sticky rubber. If it removes a layer of rubber wouldn't that also remove the TrackBite? They spray the track with TrackBite, not the tire. You do a burnout principally to remove this aged layer of rubber,

Re: [EVDL] EVLN: Venturi, OSU VBB-3 Electric Racer targets 372mph record 0-60mph:2s

2016-02-11 Thread Chris Tromley via EV
Years ago when I was paying attention to this stuff, road racers on slicks could pull 1.2g and higher without any special 'TrackBite'-like coatings on the track. I remember 2g in some situations, but I don't remember if banking was involved. The theory behind coefficient of friction is based on

Re: [EVDL] EVLN: Venturi, OSU VBB-3 Electric Racer targets 372mph record 0-60mph:2s

2016-02-11 Thread Jack Wendel via EV
> > I though I heard of sub 3 second time reported, not theorized. > I recently read of a car that does 0 - 60 in 2.2 seconds. Tesla is FAR from optimum. > > I have never gotten an explanation I could understand of how C_friction can > exceed 1 as I have heard regarding dragsters. > I'm not

Re: [EVDL] EVLN: Venturi, OSU VBB-3 Electric Racer targets 372mph record 0-60mph:2s

2016-02-11 Thread Bill Dube via EV
Ordinary pavement in contact with rubber tires give a coefficient of friction of about 1. There is no getting around this. It limits the acceleration to about 1 g, which translates to a 0 to 60 mph time of about 2.7 to 2.8 seconds. To quote the BMW owners manual on the subject of traction

Re: [EVDL] EVLN: Venturi, OSU VBB-3 Electric Racer targets 372mph record 0-60mph:2s

2016-02-11 Thread Jack Wendel via EV
> > The "layer of fresh rubber" helps, but that alone won't get you anywhere > near the traction that TrackBite will. Nor will TrackBite alone get you there without heating the tires and doing the burnout. Both are required with a car producing 1000 horsepower or more. > A properly prepped

Re: [EVDL] EVLN: Venturi, OSU VBB-3 Electric Racer targets 372mph record 0-60mph:2s

2016-02-10 Thread Bill Dube via EV
The reason that Tesla is limited to a 0 to 60 mph of 3.2 seconds is that you can only get about 1 g of acceleration on the street. The coefficient of friction (on regular pavement) is a little less than one. I'm guessing that the 2 second 0 to 60 mph time is calculated using a simplistic