Brian Rupnow does great plans for a small 4 stroke single cylinder engine .It's called a Rockerblock and it works a treat,I am now building an air cooled verticle engine of his design.His plans are excellent and at a reasonable price,He is also helpful if you need help ,the plans are sent to your computer as a file.The present engine is called a Thumper Rockerblock.The bulk of the aluminium cost about 200gbp.

Frank

Do you want an open crank IC or would a simple aero type glow engine get you started? If so have a look at the Firefly, drawings at end of thread.

Or for a flame licker the CHUKY is quite simple

Both the above are all from barstock, though the chuky looks best with a bought in flywheel casting it could be cut from solid, materials about £50GBP or less for each engine. They are all metric drawings.

You will find Brian's engine builds on MEM forum,

Just for Clarity the Farm Boy is also a bar stock engine but designed to not look like it was built from bar stock when finished.

While on the Florida site take a look at Dario's "zero-six" which is somewhere between a basic Webster and the more refined farm boy though you can also make the zero-six look like it was from castings with a bit of work. Drawings available in digital back issues of MEB magazine That was my first IC engien.

It would be possible without a rotary table if a few shapes were simplified, I did post an image of a simplified part on the first page of the build when someone commented about it being difficult, cylinder could be done to match and the cam can be done in a 4-jaw.

Should any of Jasons engines take your fancy I would highly recommend making a start on one.

I have only been into ME for a couple of years so not that much experience but last year I built his Jowitt Popett Valve engine which went well. I am also 90% through his Muncaster Entablature engine which will be finished when I,m clear of my loco build and the Muncaster is also going well so far.

The bonus with Jasons engines are his build threads which have lots of pictures of the set-ups and tooling used, plus the instructions on how to produce the parts and on some parts alternative methods should you not have the tooling. The drawings are very good to, not all squeezed onto one large confusing sheet but spread across a number of sheets, even quite small parts will only have 5 or 6 related parts on one sheet which is very helpful.

Good luck with whatever you decide on.

Check out the David Kerzel web site a nice hit & miss from bar stock