Potty Over Crank Wall Engine

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ozzie46:

Great work Stew. Your really coming along nicely.

Ron

Bogstandard:
That is really looking well now Stew. Those parts have turned out perfect.

You've done a great job scaling it down, and personally, I think you have got the size right, any smaller and the parts would start to get a little fragile, plus you wouldn't have as much 'fiddle factor' to play with, a big consideration when doing a one off like this.

John

saw:
Nice work. :thumbup:

arnoldb:
:D Looks great Stew :thumbup: :clap: :clap: Lovely Job :bow:

Kind regards, Arnold

sbwhart:
Thanks John/Keneth/Ron/Saw/Arnold

Well things slowed down a little on this project over the last week I wanted to get all the connecting rod things done before moving on to other parts, but the material for the return connecting rod has bin a long time in coming I bought it nearly three weeks ago off flebay, chased them up a couple of times and was on the point of putting it in dispute and claiming my money back from paypal, when I got notification this morning that it was in shipping, we will have to see if it arrives next week. In the mean time I did that little break rod job, with that complete I decided to get on with the fly wheel and pulleys for this engine.

For the pulley I thought I would try a method thats bin cooking away in my head for some time:-fabricate sticking all the bits together with high strength loctite, not sure if this will work but we'll give it a go.

This is the material I'll be working with:-a dog end of some thick wall pipe, a bit of hex bar and some 3/8" round mild steel bar.

First job drill across the hex bar and tap M5 for each six sides, turn up some 3/8" spokes and thread M5 then stick them in the hex with the loctite.

Then clean up the rim, and bore out leaving a step 1/2 dia of the spokes + the thickness of the rim deep.

Then after giving the loctite 24 hrs to cure and with light cut skim the spokes down to a close fit in the rim.

Then assemble the two together with the loctite.

My employer was a big user of loctite and the rep always said that the strength of the bond was a function of the contact area so I'm hoping that the thick spokes will give enough contact area for a strong bond that will do the job, if it doesn't the fall back will be to drill through the rim into the spokes and pin them together.

I'll leave it to cure before I do anything else to it, them we will see what we will see.

Stew

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