[ausev] Transmissions

[Ken Thomas]

Hi Jim,

Coupling the motor directly to the drive shaft is very common. In fact, 
most all high performance drag racing conversions use this method.

A very popular motor designed specifically for this application is the 
TransWarp by NetGain . Here is a link:
http://www.go-ev.com/TransWarP.html#TransWarP_11

This is the motor used by Michael Kadie in his Ford Cobra kit car 
conversion. Michael builds electric race cars at SSI-Racing:
http://ssi-racing.com/index.asp
NetGain also makes smaller motors with the same coupling.

A few others using direct to drive shaft are John Wayland's White 
Zombie: (also check out the history tab)
http://www.plasmaboyracing.com/whitezombie.php
Dennis Berube's "Smoke Screen":
http://www.currenteliminator.net/S10.htm
Note: Dennis's "Smoke Screen" is his daily driver.

Grassroots EV (Steve Clunn) is a conversion business in Florida that 
typically couples directly to the drive shaft:
http://www.grassrootsev.com/

For more, just check out National Electric Drag Racing Association:
http://www.nedra.com/

Hope that helps!

Ken




-----Original Message-----
From: Jim Watson <osious at gmail.com>
To: AustinEV News Announcements and General Discussion 
<ausev at austinev.org>
Sent: Wed, 4 Feb 2009 10:12 am
Subject: [ausev] Transmissions


I have just read about the new Tesla's single speed transmission ( 
8.2752:1 ).
http://www.treehugger.com/files/2008/09/tesla-motors-powertrain-transmission-1-speed.php 


I have also seen talk of electric cars that sport the electric motor in 
side of the wheel right next to the brakes. This eliminates the need 
for the drive train at all. I know all this means the use of an AC 
motor and lots of $$$$$$.

I have also seen this new concept car called the X-1, raced against a 
Ferrari and a Porch and it beats the crap out of them.

Keeping this in mind, I can't help but wonder ( or wish ) if there is 
anyway to eliminate the transmission out of the gas to electric 
conversion,.... Are there any differentials that would serve as a 
single speed reduction like the Tesla transmission. Is that a stupid 
idea,...?? Does the Tesla use their 8:1 single speed trani in 
conjunction with a x:1 differential? ( 8+X : 1 )

What I hoping or thinking about is connecting the motor directly to the 
drive shaft. But, many of you have said in the passed that when you 
consider connecting the motor to the drive shaft, the existing 
transmission serves as a means to easily couple the motor to the drive 
shaft. One of you said that the Trani serves as a safety divice to 
disconnect the motor if needed during driving.

I don't know what is out there as far as parts for coupling the motor 
to the drive shaft, if any. I don't know if what I am talking about is 
out of the question.

And would you need a differential the size of the ones used on simi 
tractor trailers just to get the right ratio,.. maybe not that big, but 
maybe you know what I mean. Its ok to tell me to keep dreaming.

Jim



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