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Forum: Electric and Solar powered

08-17-2006, 08:04 PM

Replies: 52

Tesla Motors

Views: 8,588

Posted By The Toecutter

But that can't be. EVs are slow, ugly,...

But that can't be. EVs are slow, ugly, unreliable, and people don't want them! :rolleyes:

Forum: Electric and Solar powered

08-06-2006, 11:09 PM

Replies: 52

Tesla Motors

Views: 8,588

Posted By The Toecutter

Or perhaps it doesn't have a ~.41 CdA. That would...

Or perhaps it doesn't have a ~.41 CdA. That would be way low! My own educated guess of around .50 stems from its claimed 250 miles range and guessing the car has sticky tires. Given the losses in all...

Forum: Electric and Solar powered

08-06-2006, 11:21 AM

Replies: 52

Tesla Motors

Views: 8,588

Posted By The Toecutter

600-700 miles might be over estimating a bit. I'd...

600-700 miles might be over estimating a bit. I'd think 400 miles may be in grasp with a very good driver.

But maybe I'm wrong. Can't wait for these cars to be put on the roads so we can get some...

Forum: Electric and Solar powered

07-29-2006, 03:54 PM

Replies: 52

Tesla Motors

Views: 8,588

Posted By The Toecutter

Lets examine the energy lost slowing down and...

Lets examine the energy lost slowing down and stopping in that 48 mph highway cycle for a minute.

I'm going to assume 50% of lost kinetic energy is recovered during the slow downs through regen....

Forum: Electric and Solar powered

07-28-2006, 10:01 AM

Replies: 52

Tesla Motors

Views: 8,588

Posted By The Toecutter

Regenerative braking will only recover 10-30% of...

Regenerative braking will only recover 10-30% of lost kinetic energy. Further, AC motors/inverters do not see increased efficiciency with increased load like internal combustion engines do.

The...

Forum: Electric and Solar powered

07-28-2006, 09:24 AM

Replies: 52

Tesla Motors

Views: 8,588

Posted By The Toecutter

My best educated guess is a Cd of .30 and a...

My best educated guess is a Cd of .30 and a frontal area of 18 feet square. The Elise has a .36 Cd, and Tesla claims to have made the car more aerodynamic.

I'd think on level ground at 60-65 mph,...

Forum: Electric and Solar powered

07-27-2006, 11:51 PM

Replies: 52

Tesla Motors

Views: 8,588

Posted By The Toecutter

I think you goofed your units on calculating drag...

I think you goofed your units on calculating drag at that speed. It is nowhere near 400N at 48 mph.

Your rolling force for instance, .015 * 2,500 pounds gives you 37.5 pounds rolling force, which...

Forum: Electric and Solar powered

07-27-2006, 09:18 PM

Replies: 52

Tesla Motors

Views: 8,588

Posted By The Toecutter

Lets estimate the amount of power it needs to...

Lets estimate the amount of power it needs to maintain various speeds. The following parameters are estimates(guesses):

Weight(W): 2,500 pounds
Drag Coefficient(Cd): .30
Frontal Area(A): 18...

Forum: Electric and Solar powered

07-27-2006, 07:31 PM

Replies: 52

Tesla Motors

Views: 8,588

Posted By The Toecutter

Even given that aerodynamic drag varies as a...

Even given that aerodynamic drag varies as a square of velocity, the change in range from 70 mph to 75 mph wouldn't be that dramatic. If it gets 250 miles at 70 mph, it would get around 220 miles at...

Forum: Electric and Solar powered

07-24-2006, 06:06 PM

Replies: 52

Tesla Motors

Views: 8,588

Posted By The Toecutter

"...all free cashflow goes completely into...

"...all free cashflow goes completely into driving the technology to lower costs and make it more available..."

Yep. They'd like to get a mas market EV on the road for common folk. It can be done....

Forum: Electric and Solar powered

07-24-2006, 01:26 PM

Replies: 52

Tesla Motors

Views: 8,588

Posted By The Toecutter

I could be wrong, but isn't the chassis is...

I could be wrong, but isn't the chassis is produced by Lotus, and not the entire car and drive components itself(The latter by Tesla Motors)?

Tesla Motors itself has said that it would love to...

Forum: Electric and Solar powered

07-23-2006, 01:18 PM

Replies: 52

Tesla Motors

Views: 8,588

Posted By The Toecutter

I practically creamed my pants looking at that...

I practically creamed my pants looking at that body. God damn, if that were a woman, I'd hit it!

Ok, in all seriousness, this was the proper route to go. Tesla does not have the capability to mass...

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