[Kartbuilding] question about lawnmower powered wooden go-kart

Thu Jul 29 20:12:41 IST 2010

Hi Jules,

The "eDrawing" is a 3D model of the connection shown in the PDF. I put
it on the kartbuilding website. Click on the following link:
http://kartbuilding.net/PlAnS/Engine-Shaft-Pulley-Connection.exe

I've also attached a 3D PDF to this email in case the above exe doesn't
work. Just open the PDF and left-click drag to rotate.

This method of connecting the pulley securely to the engine should work
the best.

-steve

On 28/07/2010 23:22, Julie Swanson wrote:
> Thanks so much. I could not get the last thing you attached to open up
> (it comes up as all crazy symbols and says, "This program cannot be
> run in DOS mode" ???), but the first one shows me what we could do and
> that opened fine. I do realize the engine sits lower than that; we
> just hadn't attached the blocks yet so we set the plywood on top like
> that for now. If the Engine-Shaft-Pulley connection zip is critical
> for us to see, could you try resending in another format or tell a
> computer idiot how to get it to open? If not, I think we can figure it
> out probably with what we can see.
>
> Thanks,
> Jules
> ----- Original Message -----
> From: Stephen Burke
> To: Julie Swanson , kartbuilding
> Sent: Wed, 28 Jul 2010 16:27:12 -0400 (EDT)
> Subject: Re: question about lawnmower powered wooden go-kart
>
>
>
>
>   
>   
>
>
> Hi Jules,
>
>
>
> Sorry for the delay in getting back to you.
>
> Please find attached a PDF showing what I suggest. I have also attached
> a 3D eDrawing, in a Zip file, to this email.
>
>
>
> What I suggest is as follows:
>
> See 1. on the PDF. You will have to cut 2 grooves into your output
> shaft, using a (new blade) hacksaw and file.
>
> See 2. on the PDF. Get some flat steel bar 20mm x 5mm around 80mm long.
> Bend into an "n" shape, so it will fit into the groove made on the
> output shaft.
>
> See 3. on the PDF. Using a hacksaw and file, remove a single groove to
> accommodate the bent "n" shape of metal.
>
>
>
> Using a long bolt, tighten the lot together onto the end of the Engine
> Shaft.
>
> Using this method, there is no way the pulley wheel would rotate on its
> own, and would be fully attached to the engine output shaft.
>
>
>
> The above procedure is very similar to what I done for my kart. See:
>
> http://kartbuilding.net/gallery/v/Kart_Clearance_and_Memories/DSC01217.JPG.html
>
> http://kartbuilding.net/gallery/v/Kart_Clearance_and_Memories/DSC01214.JPG.html
>
>
> http://kartbuilding.net/gallery/v/Kart_Clearance_and_Memories/DSC01070.JPG.html
>
>
>
>
> Let me know what you think.
>
>
>
> Thanks also for the photos. Please email on some more.
>
> I have concerns about "100_0974" where the engine is shown on the rear
> of the kart.
>
> The engine it too high. The engines output shaft, where the pulley is,
> should be lower down to the rear axle. See the attached image.
>
>
>
> Feel free to email on some more images. It was many years ago when I
> made my lawnmower powered wooden go-kart, and of course I didn't take
> any photos!
>
> Also, I'd like to put the photos on the kartbuilding.net gallery at
> http://kartbuilding.net/gallery/v/OtherPeoplesKarts/  to help other
> people.
>
>
>
> Let me know how the kart goes.
>
>
>
> Best of luck,
>
> -steve
>
>
>
>
>
>
>
> On 26/07/2010 23:42, Julie Swanson wrote:
>
>
>       Attached
>     are some pictures of the drive shaft and pulley. I'm thinking of going
>     and buying another pulley that doesn't have the thickness this one
>     does
>     (the knob on one side) but am also thinking I could hacksaw that
>     off or
>     wait and see what you suggest. I think the drive shaft is iron or
>     steel, something that rusts has to have iron in it, right? A magnet
>     sticks to it at any rate.
>
>       
>
>     I was thinking maybe I could cut the knob off the pulley and bolt
>     it on
>     (or try to find a thinner one w/o the knob; couldn't find one at the
>     store that size) and then buy a thin drill bit that will drill into
>     metal and drill at an angle through the pulled and into the drive
>     shaft
>     and then sink a thin finishing nail or metal pin in there and cut and
>     file it off flush to the angled V of the pulley. Do you think that
>     would work, 2 or three little pins like that?
>
>       
>
>     Thanks for taking a look at this.
>
>       
>
>     Jules
>
>       
>
>     ----- Original Message -----
>
>     From: Stephen Burke
>
>     To: Julie Swanson ,
>
>     Sent: Mon, 26 Jul 2010 17:26:52 -0400 (EDT)
>
>     Subject: Re: question about lawnmower powered wooden go-kart
>
>       
>
>       
>
>       
>
>       
>
>       
>
>       
>
>       
>
>       
>
>     Hi Jules,
>
>       
>
>       
>
>       
>
>     If you could send on a few images of the drive shaft, that would make
>
>     things easier.
>
>       
>
>       
>
>       
>
>     This 2" flat circle. Is is steel or aluminium?
>
>       
>
>     Could you drill into this 2" flat circle? I take it, that its 2"
>
>     diameter. What thickness is it?
>
>       
>
>       
>
>       
>
>     If you could email on a few images, I can draw in on them the best way
>
>     to attach a pulley.
>
>       
>
>     Also if you could take some images of the pulley wheel you want to
>
>     attach I'll be able to explain more.
>
>       
>
>       
>
>       
>
>     -steve
>
>       
>
>       
>
>       
>
>       
>
>       
>
>       
>
>       
>
>     On 26/07/2010 20:02, Julie Swanson wrote:
>
>       
>
>       
>
>       
>
>     My son and I are building a go cart according your websites plans
>
>     (we're on drawing 17) and we're having a problem securing pulley wheel
>
>     to engine output shaft. The notes given say that the author may be
>     able
>
>     to suggest some methods and options (we're hopeful; we've put a lot of
>
>     time into this and a snag like this can't stop us now!). Our engine
>
>     output shaft is just flat across the bottom, doesnt have anything
>     where
>
>     it would make sense to cut a groove or slot in the pulley wheel. Given
>
>     that the output shaft is a cylinder with a flat circular base the bolt
>
>     that holds the lawnmower blade goes into, we're not sure what we could
>
>     do to keep the pulley from spinning independently of the output
>     shaft.
>
>       
>
>       
>
>       
>
>     Any suggestions as to how we could do this would be greatly
>
>     appreciated. I'd send you a picture, but it's really nothing you can't
>
>     envision by my saying that the base of the output shaft the pulley
>
>     would be bolted to is just a flat circle about 2" in diameter, with a
>
>     hole in the center of it that the bolt screws into--nothing else to
>
>     describe. The engine is from an old Murray 22" push mower (3.5
>
>     horsepower) if that helps; we bought it used ten years ago so it might
>
>     be 15+ years old.
>
>       
>
>       
>
>       
>
>     Thanks,
>
>       
>
>       
>
>       
>
>     Jules
>

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