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I decided to make a Simple Single using the techniques I had learned on the V8. The crankshaft, piston and conrod are all similar and the inlet valve and pushrod are a modification of the experimental single. Here is the engine on YouTube. https://www.youtube.com/watch?v=9RZL3ZBo6D4 Ian

It's been a while but I have found time to finish this engine. Here are the YouTube links :- https://www.youtube.com/watch?v=yXgaZM_b9iE https://www.youtube.com/watch?v=8ysh0kwC6mw Getting the cam right was a problem:wall: The followers are 6mm PEEK and they are what you can hear...

Dug out the little single cylinder engine, here, for those who havent seen it. http://www.youtube.com/watch?v=04RBvolzaiA&feature=plcp This is how it works. (Photobucket is playing up, had to use imageshack .) This is the set up for measuring the RPM. These are the results of...

+1 What Brian said. For me, "Now that might just work" is an itch that just has to be scratched. " it's cool, but can it be used for something useful ?" Mostly no, but it looks good on the shelf and can be shown to friends and grandchildren who ask "What you been doing?" Reminds me of a...

Todd - thanks for looking in. Now for the first BIG TEST - will they all go together without anything fouling and the crankshaft rotates OK.:) Camshaft is the next problem to solve. I will use my single cylinder test engine to establish the timing for the inlet valves. With eight air...

Pistons all completed. This photo shows all the bits made so far. The gudgeon pins have small discs of PTFE to stop them scoring the bores. Completed all the valve bits. The "O" ring is just to stop the stainless steel balls making a bid for freedom - not that it would do them any good...

Next job was the two end plates, they are "Y" shaped but by first making them out of rectangles I could hold them in the vise and use my DRO scales to get all the hole centres accurate. Then I could rough cut them on my bandsaw and finish to size on the vertical mill. Using two M4 cap head...

This project has not been deserted, just not been able to get as much time on it as I would like. I have drawn up the design of the 45 Degree Block. To recap, this will give a power pulse 8 times during one rotation. So onto the Blocks, made from 45 mm dia brass bar. The bores were...

Possibly B Elliott Group Ltd. They sold Victoria mills and Cardiff lathes. Established back in 1900, so there is lots of information on the net. Still surviving. Ian

Josh, Welcome to the group! Quote :- "Fortunately, the principal at my daughter's school recognizes the value of letting children learn, and this occasionally requires that they use their hands and their brains." I too get involved as a tutor for an after school club for 10-11 year...

Well done Chuck, your inventiveness with model engines deserves this recognition. Ian

Yes, I too have suffered from the Taker, but unlike you lazy lot, I decided to do something about him. I would beard him in his den and finally sort him out. After thinking about the problem , I came up with a quadridimensional program for my PC. This was based on the use of the twin speakers to...

Geoff and John, thanks for the links. Ian

I saw this one working a few years ago. http://homepage.ntlworld.com/lawrence.roy/cornwall/levantm.htm What (not Watt) surprised me was how fast is was for it's size, maybe 500 rpm. On a visit to Devon with the Grandsons (Digger World was amazing), we went to Dartmouth where Newcomen was...

Thanks Will, I hope I can find enough time to actually finish it! Since I have been able to scale down the NSU cam drive system, I'd better transfer it over to where I want to use it. Side View The bits The video http://youtu.be/Z4vHcDu1XfU The centre distance on this video is 40 mm...

Well, it is possible to scale down this cam drive system. http://youtu.be/Z4vHcDu1XfU The centre distance on this video is 40 mm and it is here driven by my battery drill, maximum speed shown is about 900 rpm. Using my mains drill, it will run up to 3,000 rpm easily. So it now needs some...

Thanks for taking an interest, I will keep this thread updated with any progress. I am just trying to decide if I should make my test engine into a single overhead cam system to sort out the practicalities. Ian

Doc, thanks for the kind words - it is a long way yet 'til it runs :( Chuck - as you know the engine was a quick test bed to try out ideas. The brass lump was so that I could vary the spring pressure on the exhaust ball valve, no longer needed but the exhaust sounds better! I hope you do give...

I had to re-read my thread to see where I had got to. All the different steel ball sizes, porting and springs could be made to work over a narrow speed range but Whilst experimenting with the exhaust ball valve, I noticed that if the ball was held off it's seat the engine speeded up! So I...

I need a compact cam drive system for my compressed air V8 engine see:- http://www.homemodelenginemachinist.com/index.php?topic=14530.0 I had seen this system in a review of a NSU Prinz car years ago and filed it away to look at later, because I didn't understand how it worked. The journalists...