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I started to sketch up the components, it doesnt take all that long when you consider how long it takes to make them. 10 Minutes spent on a connecting rod doesnt seem that much when I will spend a lot longer machining one. I couldnt help myself, I had to put the pieces I have done so far...

Good point John, I didn't think about the look of the scale, being new to this hobby. I was lucky today and sold a few things so I can buy a few extras and maybe do it out of some nice metal.. Hopefully the family will give me some time on the weekend to redraw the plans. thanks, Jason

Hi John, thanks for replying. 50% does make it seem a lot larger and starts to get to size I am happy with. Did you also move to metric bolts, the closest size up?. I will go back to his plans and see that I think may be difficult for me at that size. Thanks, Jason

No posts from me for a few days. I decided to do a horizontal engine still but I am not sure about the plans. I am going to make sure I understand the workings and draw something on the computer. This way I can scale and change a thing or two that may be difficult for me to make.. I will...

Hi Gail and MB, Gail, I guess the threads are not really the problem, I can turn 3mm on the lathe, anything smaller and my leasdscrew/gearbox combination doesn't support it. I could approximate the pitch with the feed bit that doesnt use the leadscrew so I am not sure how accurate it would be on...

Hi all, here is the thread for my second project. IAlthough at this point I am unsure of what it will be. I am really quite enthusiastic at the moment, I have spent many months on my previous project that I was a bit tired, that and doing things for friends is all I have been doing in the...

Hello Dean, I am looking for my next engine and I wanted to do something like this but I can't find the plans for this to have a look at. I have been to Rudy's site but I only see sterlings, flame lickers and IC? I don't suppose you could post a link to his page please? Edit: What a...

Thanks all, I like spending time in the workshop so as usual it was fun building it, although frustrating doing the cylinder bore three times ;D I nearly did it four times with the same mistake. I looked at the plans again and there is something counter intuitive about that drawing the makes...

Thanks Arnold, I had a quick look there a week ago and must go back. I have one more very poor quality video done on the phone.. its really ticking along nicely now.. the vid is two minutes because I start to see how slowly it will go.. It really needs the oil though, I am using the light oil...

I put it back together and gave it a run. I little tinker with the spring tension and it's now a runner ;D Thats one under my belt hehe.. Now to find some good plans for a horizontal factory/mill type engine.

ok, so I did a new pin.. I dont usually deal with anything smaller then M6 so I dont have any dies for m4 or m5. The cylinder block is tapped for M5. I had some old 5mm silver steel around so I needed to cut a screw on it for m5. Then I find my lathe doesn't do m5 or m4!! I have never needed...

I guess this type of engine is never going to be as smooth as others with a big cylinder block rubbing against an upright.. I suppose with a bit more polishing it could run better. I put some oil between the cylinder block and the upright but it doest take long for it to get blown out. It...

Hmm, I had a missing post somewhere. No matter.. I do the same thing all the time when making up cables! I am only saved if I havent done the other end yet so I can slip it on there. I put it all together and put some air through it. To my surprise it ran :) and then it didn't.. It...

Oh boy, I milled to size the new upright and before I started to drill I thought I would re check the old one to see where I went wrong and not do it again.. I thought perhaps I had not adjustedm for the diameter of the edgefinder.. When I looked at it again it was correct.. ??? ??? It...

And it turns out that is exactly what the problem is.. I must have transposed some number or something.. Too late to look at it now.. Thankfully it's a rather easy piece but I am getting worried that I have almost built two of these engines now and will only have one to show for it :big:

Thanks Tin, hope so, not far away from finding out. It was a little longer then expected because I couldnt put in the chuck of the dividing head as I wanted. The only way I could do it is if I held the piston by the head which I didnt want to do, I was bound to scratch it.. I ended up...

Hi all, I have a bit of a question. I have done the piston and I am not really sure of what is a good fit.. The cylinder is bored to .5" and it reads exactly that (.5000) with my calipers. The piston is reads .0015" under. The movement is nice but the air pressure is my only concern...

Well, I sure didn't think I would be showing you something interesting! As I say, for a small flywheel like this - 2.5" my tool on the lathe is too big to get in there easily and I couldn't be bothered grinding something to use. All my tooling is the insert type on a 3/4" holder. I was...

I can see that I may need to purchase a little more tooling to do some of these jobs. My lathe tools are to large to work on the little wheel ::) So instead of turning out the inside of the wheel I moved it on to the mill and the dividing head. The dividing head is good but it takes up a lot...

OK, back on track, forgotten all the errors so far :) I have redone the cylinder, using a reamer this to finish this time. No problems here. I was going to do the piston next but I already started to do the fly wheel so I will have to finish that first. Here are the pieces so far..