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RE: (ET) Re: high powered garden tractor puller - longwinded newbie
Thanks Tim,
Those are exactly the posts I was looking for.
Stay Charged!
Hump
---------- Original Message ----------------------------------
From: "Chapin, Tim" <tchapin umich edu>
Date: Mon, 22 Mar 2004 10:53:48 -0500
>Found another email about a second pull with the same 3-20
>
>http://cosmos.phy.tufts.edu/mhonarc/elec-trak/msg00678.html
>
>
>-----Original Message-----
>From: elec-trak-bounces cosmos phy tufts edu
>[mailto:elec-trak-bounces cosmos phy tufts edu] On Behalf Of T
Humphrey
>Sent: Monday, March 22, 2004 10:32 AM
>To: elec-trak cosmos phy tufts edu
>Subject: (ET) Re: high powered garden tractor puller - longwinded
newbie
>
>OK Guys,
>
>Help me out here. I remember someone here entering their tractor
>in a pull and doing quite well with it. In fact I have the video
>on my computer at home. Unfortunately I can't seem to find the
>source at the moment.
>
>Somebody must know where it is.....
>
>The following is from the EV List.....
>
>
>Stay Charged!
>Hump
>
>
>>
>>
>>-----Original Message-----
>>From: owner-ev listproc sjsu edu [mailto:owner-
>ev listproc sjsu edu] On
>>Behalf Of Tom Shay
>>Sent: Monday, March 22, 2004 3:12 AM
>>To: ev listproc sjsu edu
>>Subject: Re: high powered garden tractor puller - longwinded
>newbie
>>
>>
>>It sounds like making an electric tractor puller could be a fun
>>challenge! How fast do these tractors go on a pull?
>>
>>I've got a Cub Cadet Model 147 Hydrostatic. It originally had a
>single
>>cylinder Kohler 14 hp engine. I did convert it to
>>electric power and tried two different aircraft generators for
>drive motors.
>>It used two 12-volt starting batteries. Either electric motor
>produced
>>plenty of torque to easily spin the wheels. The motors turned
>slowly on 24
>>volts so that max speed was hardly more than a man could walk.
I
>wanted to
>>but never got around to trying 48 or 72 volts.
>>
>>It's hard to imagine how a tractor like this might perform with
a
>50-65 hp
>>engine or motor.
>>
>>Tom Shay
>>
>>----- Original Message -----
>>From: "Geo" <george3476 aol com>
>>To: <ev listproc sjsu edu>
>>Sent: Sunday, March 21, 2004 6:56 PM
>>Subject: high powered garden tractor puller - longwinded newbie
>>
>>
>>> Hello folks, a newbie here,,,I've been thinking for awhile now
>about
>>> building an EV puller within the confines of an older IH Cub
>Cadet
>>> (1000 or _82 series) garden tractor chassis which are for the
>most
>>> part used exclusively in the National Quarter Scale pulling
>series
>>> with aftermarket single cylinder flathead 50-65 hp. alcohol
>powered
>>> racing engines (around 6500-7000 rpm) and superduty IH
>drivelines in
>>> a 1050 lb.Pro Stock class on pulling tracks from 200-250' in
>length.
>>> Being as electrics are supposed to be superior in torque for
>short
>>> distances I'm thinking that I could build an off the wall
>puller with
>>> an Emotor (I'm one of those "boat rockers", LOL)...we pull a
>weight
>>> sled (approx. 5000lbs.) that has a weightbox starting out over
>the
>>> sleds rear axle and then according to which gear the sled's
box
>is in
>>> it goes forward till it's over a large flat skid pan making
>it "dead
>>> weight" thereby making it exceedingly difficult to pull until
>the
>>> tractor loses power/traction or makes a "full pull". I'd say
it
>takes
>>> about 15-20 seconds or so to make a 200' pull plus the tractor
>needs
>>> to be driven slowly from pit to scales to track and back
again,
>>> ocassionally making 2-3 runs in a 5-10 minute period twice in
a
>day ,
>>> second weight class about 1 1/2 hour later, of that 200' pull
>the
>>> pull starts out fast as possible but easy (getting up ground
>speed
>>> for momentum) and then you feel resistance coming on around
the
>75'
>>> mark and gets more difficult thereon. I wish to maximize the
>>> horsepower and rpms and minimize the front end weight but be
>>> competitive (not asking for much, eh,,LOL). Was hoping to run
a
>motor
>>> directly hooked to the transaxle without a clutch. Not sure
>what
>>> motor to run or motor/battery heat factors on a hot summers
>day, but
>>> here's what I'm looking at at the moment,,, a D&D ES15A 6.7"
>dia.
>>> 10hp.cont., 40hp. peak 48-96V. 62lb. motor, figure I can get
>8ea.
>>> 12V. for 96V. batteries - lookin at MK BT9516 AGM 34AH
>24.44lbs. and
>>> maybe a Zilla Z1K 1000 amp. controller (do I need something
>this big)
>>> all concealed within enclosed frame and underhood body work.
>Maybe I
>>> can bypass the reduction gear and go straight into the tranny
>for 4
>>> pulling speeds making for faster gearing, hoping for reverse
on
>motor
>>> but not mandatory. No other tractor electrics except I need a
>lanyard
>>> pull type "kill" switch at the rear end, maybe an onboard
>charger if
>>> there's room or weight to play with. Does this sound like a
>feasable
>>> project or do I have my head on backwards,,,any
>recommendations ???
>>> also what other ev parts are neccessary for my application for
>safe
>>> operation ??? Thanks for any insight you can give me, I've not
>found
>>> any info relative to high performance applications on the net
>sofar.
>>> I may go for it if I cando at a reasonable cost...Thanks
>again...Geo
>>>
>>> my pulling tractor photos;
>>> http://photos.yahoo.com/george3476
>>> my pulling club;
>http://groups.yahoo.com/group/wnygardentractorpullers
>>>
>>>
>>
>
>
>
>
>
>
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