[Kartbuilding] thanks

[Stephen Burke]

Hi Ami,

Thanks for your DWG files. They are interesting designs for the drivetrain!

That is a very nice 90 degree angle gearbox that you have. It looks
strong enough to take a lot of power.

The reverse gearbox is still hard to decide upon. Having too many
belt-tensioner levers makes driving the vehicle difficult.
Ideally you need a complete gearbox which will take a vertical drive,
have forward and reverse gears built-in.

I've seen such small and suitable gearboxes on "tractor lawnmowers" (or
ride-on mowers).
See:
http://sell.lulusoso.com/selling-leads/161874/riding-mower-transaxle.html

I also came across the following website which may be of interest to you:
http://members.tele2.nl/s_weggeman/Capacity.htm
( http://members.tele2.nl/s_weggeman/Capacity_files/image007.jpg )

I hope the build is going good. Let us know how it works out for you.

Best of luck,
-steve


On 30/04/2012 22:38, Ami Rosen wrote:
> Hi Steve ,
>  
> First of all thanks for your reply .
>  
> You beleve it or not but my first idea regarding the revers was the same
> as yours.... see the file attached  .
> I leave it because I was not sure that the tractor move or the
> round poliuritan belt ( 8 mm dia.) will slip on the pulley .
>  
> I have a crasy idea how to make a simple gear for the
> revers problm . I will make a DWG and send it to you .
>  
> BTW  I am using the DraftSight softwere , to my opinion
> that software  better than autodesk and its free . 
>  
> thanks again
>  
> Ami
>  
>
>
>  
> 2012/4/30 Stephen Burke <<mailto:stephen at sburke.eu>>
>
>     Hi Ami,
>
>     Thanks for the DWG File and Photo. The design looks good. You have
>     put a
>     lot of work into it!
>
>     Reverse is difficult.
>     It would be best if you could get a simple gearbox. However
>     gearboxes can
>     be very heavy and waste power.
>     I created an image (attached to this email). You could use a set of
>     (more!) pulleys, and twist the v-belt. This combined with a
>     tensioner arm
>     would allow a reverse option. The v-belt would wear quite quickly
>     however
>     as it would be twisted against itself.
>     It is an idea to think about.
>
>     I hope it helps. If you get any more photos of the tractor it would be
>     good to see them.
>
>     Best of luck,
>     -steve
>
>
>     On Thu, 26 Apr 2012 13:29:33 +0300, Ami Rosen <>
>     wrote:
>     > Hi Steve /
>     >
>     > Attach a file of my design for your comments pls .
>     > Do u have any idea how to make the tractor move revers .....?
>     > A simple gearbox ?
>     >
>     > Sorry for my poor English , U.K. left Israel 65 years ago
>     > I was only 5 years old that time ....
>     >
>     > Best regard
>     >
>     > Ami
>     >
>     >  בתאריך 24 באפריל 2012 22:12, מאת Stephen Burke <>:
>     >
>     >> Hi Ami,
>     >>
>     >> Thanks for your email and good comments on the kartbuilding.net
>     <http://kartbuilding.net/>
>     website.
>     >> It sounds like you made a good project in that tractor!
>     >>
>     >> Best of luck,
>     >> -steve
>     >>
>     >>
>     >>
>     >> On Mon, 23 Apr 2012, Ami Rosen wrote:
>     >>
>     >> Hi
>     >>>
>     >>> thanks for your great site !!
>     >>>
>     >>> Its helping me to design a crawler tractor ( Caterpillar D4 )
>     1 meter
>     >>> long .
>     >>>
>     >>> using Briggs & stratton 4 hp verticle motor , v belt , ect.
>     >>>
>     >>> Ami Rosen
>     >>>
>     >>> Israel
>     >>>
>     >>
>




-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.burkesys.com/pipermail/kartbuilding/attachments/20120525/db342ee7/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: dgabjbcc.png
Type: image/png
Size: 269450 bytes
Desc: not available
URL: <http://lists.burkesys.com/pipermail/kartbuilding/attachments/20120525/db342ee7/attachment.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: gfcehgdi.png
Type: image/png
Size: 24015 bytes
Desc: not available
URL: <http://lists.burkesys.com/pipermail/kartbuilding/attachments/20120525/db342ee7/attachment-0001.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image007.jpg
Type: image/jpeg
Size: 173270 bytes
Desc: not available
URL: <http://lists.burkesys.com/pipermail/kartbuilding/attachments/20120525/db342ee7/attachment.jpg>