I've made a start on making a new engine… The plans I've made up call for something that looks like this:

This is the cylinder as is.. I've not really done much with the project at the moment, it is far too cold in the shed to do anything really.

The block is made from aluminium, with a bronze insert bored out to 28mm. The Gerber is for scale.

Thanks. At the moment my camera takes pics that are 4272x2848 then I resize them to 1000x667 ish.

The engine, hopefully will run like the animation here http://www.animatedengines.com…..tive.shtml

I just need to figure out the timing and construction of the valves

I used a bit of cast iron from a sash window weight, cut it on the angle grinder, and chucked it in the lathe, I started to machine half of it so that I could chuck it up better.

After I'd done that I flipped it in the chuck and began to smooth out the other side.

I then machined the other side down.

This is going to be the piston, it will end up being 27.75mm in dia by 10mm.

I might scrap this piece as it seems to have quite a few casting pits in it. I guess I will have to wait and see how it will turn out.

I still have the rest of the window weight to use, l think it'll be ok.

Thank you very much for your offer, I shall keep it in mind if it does go sour.

Well at the moment it looks quite promising, I'm about a mill from final diameter and all is well so far… fingers crossed.