I need axle help

[mattmanfirsttimer]

I'm building a bit of a weird project, I'm straping a 3 hp engine I found on Craigslist to a longboard because it sounds fun, the only problem being that I can't weld and have a very tight budget. So far, I have the engine running, a throttle worked out, a dead man switch and the mounting for the engine, it will be behind the board and will drive a fifth wheel so I don't have to deal with getting a sprocket on a skateboard wheel. The only problem is the board behind the skateboard is made of wood, and I have no idea how to attach a single wheel with bearings to a wooden board. I was going to use the axle and wheel off of a dolly but after reading up it doesn't seem smart, I'm going to have a sprocket on the wheel with around 60ish teeth so I can't use a small wheel and I don't know how to attach a sprocket to a kids bike wheel and then mount it to wood, any help would be great.

 

[Hellion]

Obviously it's going to be some kind of frame hanging off the back that supports the engine plus an axle and a wheel.

Figure on the back portion of a mini bike (idea-wise) with a sprocket attached to a wheel, a chain and clutch.

Photos please or an extremely detailed explanation of the engine and parts you have, plus the dimensions of the board. Scratch that, just give us photos.

 

[landuse]

Welcome

 

[mattmanfirsttimer]

How do I add photos on mobile?

 

[landuse]

How do I add photos on mobile?

http://www.diygokarts.com/vb/showthread.php?t=20169

 

[Hellion]

I'd acquire some scrap sheet metal to build your engine mount and bolt some angle iron to it to attach to your board.

I did a quick and dirty drawing (not to scale) to illustrate the basic idea. Figure your throttle will be a cable with some kind of lever (brake lever?) that you squeeze.

What about a brake?

 

[mckutzy]

I'm going out on a limb...
Why not a scrub brake... Foot actuated...
But I do think you should have a a handle bar.. Even If it doesn't "steer"... The trucks steer with bias weight.. That just allows you to some what control the board. Keeping the front down under excelleration...

 

[Hellion]

...Keeping the front down under excelleration...

I like your new word. I'm going to steal it. Excelleration, noun. Excellence in acceleration?

---------- Post added at 12:44 AM ---------- Previous post was at 12:42 AM ----------

The brake for this powered skateboard can be the combined sprocket/brake drum type attached to the drive wheel.

 

[mattmanfirsttimer]

Thanks for the drawing and all the ideas, I've decided I'm gonna use a bicycle brake lever for a throttle, I'm gonna skip the brakes for now (safety third!) and now all I need is a way to attach an axle with a wheel on it to a piece of wood. The design in the drawing looks like it would work really well, but I don't know how to work with metal and I'm really don't want to scrap the work I've already done (I'm pretty lazy)

I don't know if the pictures posted or not, I'm going to try again.

---------- Post added at 12:55 AM ---------- Previous post was at 12:52 AM ----------

 

[mattmanfirsttimer]

I've been looking around and I've decided I'm going to use a fixed axle design, now my only problem is finding the parts, I can't seem to find anything online as all the websites that pop up seem to only have live axles, any ideas?

 

[Hellion]

A minibike rear axle?

 

[Hellion]

I only hope these three lovely ladies can motivate you...

 

[mattmanfirsttimer]

I've decided on either clamping the mini bike rear axle to the wood with some sort of hardware store black magic or lopping of the front fork of a kids bike and rednecking it together with duct tape, bubble gum and woodscrews with a good about of hope to hold it all together. Wish me luck!

 

[pRoFiT]

And i thought my project was unsafe! check out my junk build Trike! same idea but motor on front wheel direct drive. I have a welder though. so mine is probably going to hold together longer?

So yours will look like this in the end? Hopefully?