(ET) Re: high powered garden tractor puller - longwinded newbie

["T Humphrey" <thumphrey mynra com>]

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
>> 
>> 
>