Re: (ET) E 20 - charger hum kinda

["Tim Humphrey" <hump evgrin com>]

Yes, I can see the need for an emergency disconnect.

However in this instance unfortunately, going downhill, hitting the 
disconnect will result in the same problem....a
runaway tractor.


-- 
Stay Charged!
Hump
"Ignorance is treatable, with a good prognosis. However, if left 
untreated, it develops into Arrogance, which is often
fatal. :-)" -- Lee Hart

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>
>
> -----Original Message-----
> From: elec-trak-bounces cosmos phy tufts edu
> [mailto:elec-trak-bounces cosmos phy tufts edu] On Behalf Of Konstanty,
> Walter (GE Indust, ConsInd)
> Sent: Tuesday, June 06, 2006 9:59 AM
> To: matt; elec-trak cosmos phy tufts edu
> Subject: Re: (ET) E 20 - charger hum kinda
>
> I was thinking more about the song  " To infinity and beyond " ......the
> disconnect on the Elec-Traks is for that purpose.  I had some kids over
> riding the tractor and one of them was heading downhill and he nudged the
> gearshift into neutral....the tractor almost went out of control and he 
> just
> missed 2 toddlers before turning it into the woods to stop it uphill into
> the brush....a very close call.  He was standing and couldn't hit the 
> brakes
> hard enough....
> it was a real lesson on letting kids ride these on hills.  Whew!
>
> ....Walt
> Erie PA
>
> -----Original Message-----
> From: elec-trak-bounces cosmos phy tufts edu
> [mailto:elec-trak-bounces cosmos phy tufts edu]On Behalf Of matt
> Sent: Tuesday, June 06, 2006 8:19 AM
> To: elec-trak cosmos phy tufts edu
> Subject: Re: (ET) E 20 - charger hum kinda
>
>
> At 10:54 AM 6/5/06 -0400, you wrote:
>>In case a contactor sticks and you can't stop the tractor!
>>
>>When I first started really getting into EVs almost 20 years ago, I
>>heard about a '70s vintage EV hobbyist who decided he had to try out
>>his not-quite- finished conversion before having any kind of emergency
> disconnect in place.
>> The controller failed and the motor went full on!  He was careening
>>down the road, braking with all his might, to no avail.
>>
>>Fortunately he had a couple of batteries loose on the front floor of
>>the car, and his tools on the seat beside him.  He was finally able to
>>stop the car by beating a battery post with a hammer until it broke off.
>
> Brings to songs to mind, " HOT ROD LINCON, LITTLE NASH RAMBLER"
> Matthew P. Magda Jr.
>
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