[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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
>>> 
>>> 
>>
> 
>
>
> 
>                   
>
>_______________________________________________
>Elec-trak mailing list
>Elec-trak cosmos phy tufts edu
>https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
>