Electric Motors

[mad_pete]

Aren't model Ss insanely fast? 2.5 0-60 at the top spec ?

[lo-fi]

All the Tesla models are fast. Even their mass market model 3 base model will be sub 6 seconds to 60. The fastest model S is actually limited by the maximum battery discharge rate, not the power the motor can handle. 970hp, if I remember correctly. 

"at Tesla, we don't make slow cars"

- Elon Musk

Glad to see some enlightened conversation continuing on this subject - it's something I've considered myself, much as I'm actually in the queue to buy a model 3

I've often wondered how much a motor/inverter/diff pack from Tesla would cost. They've been pretty good about sharing parents with other firms to encourage EV production, but I've yet to find out if they're hobbyist friendly. Might be interesting to find out.

If anyone is interested, they have a model S chassis at the dealership in London. It's a metal with of art, and you'll be gobsmacked by how small that 300hp motor is. Barely bigger than a large starter motor. 

Other avenues... Scrapped Prius? Though low power. 

As simonr points out, fork lift motors can be quite effective: http://www.currentracing.co.uk/Blackcurrent/bc3.php

[Daan]

I reckon the way to go for an electric car is to buy a Nissan Leaf with a dead battery @ 5k and fit a new battery @ 5k. This gives you a usable electric car for about 3-4 years.

I had a serious look at it recently, but I cannot see it working (yet). Here is the reason:

Problem is the range is about 100 miles; but this involves charging 100% and flatten it completely.

In order to get a meaning full battery life, you need to set charging to 80% and not discharge to less than 20%.

This is also what nissan bases the warranty on. So you loose 40% on top of the fact that you only get 80% of the stated range. Also, after 2 years your battery power is only 80% of what you started with.

Then, if the temps are getting below zero, another 80%.

This works out at: 60% x 80% x 80% x 80% x 100 miles = 31 miles. 

Based on this, I can just make it to work one way. I have decided for now it is not viable, as I cannot charge at work.

 

Maybe give it 2-3 years and better solutions could appear.

 

Daan

[Soren Frimodt]

Just stumbled upon this video yesterday about a universal Hybrid setup, quite cool I reckon:

 

[Bowie69]

I saw that too, pretty cool, even if it weighs a ton!

[Soren Frimodt]

22 minutes ago, Bowie69 said:

I saw that too, pretty cool, even if it weighs a ton!

Sure would spice up the old 2,25 with the flip of a switch!

Edited December 10, 2016 by Soren Frimodt

[missingsid]

All the Tesla models are fast. Even their mass market model 3 base model will be sub 6 seconds to 60. The fastest model S is actually limited by the maximum battery discharge rate, not the power the motor can handle. 970hp, if I remember correctly. 

"at Tesla, we don't make slow cars"

 

I was under the impression that the fast cars were the twin motor ones, the single motor variants were much more docile?

[Bowie69]

2 hours ago, Soren Frimodt said:

Sure would spice up the old 2,25 with the flip of a switch!

150lbft apparently

[FridgeFreezer]

Why bolt it to the engine when you've got a PTO hole on the transfer case you can drive straight into with a nice flange?

Biggest issue is always going to be the batteries - size, weight, cost, management, safety.

Given how explosive a faulty Samsung phone can be, how do you fancy crashing a vehicle with 10,000 of them under your ar5e?