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Ken I don't know if you are interested (or have done) other mods to your Unimat. There is a book by Rex Tingey: Making the Most Of the Unimat. I can send you a copy if you would like it. Dave The Emerald Isle

I've had quite a few engine projects that ended up as junk! Dave The Emerald Isle

The link below provides an interesting modification to Oscillating engine valve events. http://www.panyo.com/oscillators/ Dave The Emerald Isle

Yes. this piece even has the DuPont marking on the bottom! I was given a load of offcuts (sink cut-outs and the like) some time ago and they come in handy for small model bases. It's easy to cut with a hacksaw and files well. Dave The Emerald Isle

My long term project has stalled and as I had been given 4 week's notice of a visit to the Body Shop for some R & R (= hospital for some Renewal and Rejuvenation) I thought it a good idea to undertake a quickie project before absence from the workshop set in. I've looked at Elmer's no.35 pump...

Just a thought Simon: As a public spirited gesture and an aid to future purchasers of the castings, would you give Hemmingway a list of the errors you find? I would not be a beneficiary, by the way! Dave The Emerald Isle

That's very heartening to know, Brent. I hope you have continued success with your venture. Dave The Emerald Isle

On the valve Parts drawing, there is shown the Inlet Valve Seating, screwed M10 x 1.0. You will note the countersunk valve seat therein. The Inlet Valve Seating screws into the end of the cylinder. The valve head sits in the countersunk area until actuated. This then allows steam/air into...

Peter You may have already realised, but with serial taps the first tap have 1 ring ground on the shank, the second tap will have 2 rings ground on the shank and the full depth tap will have nothing on the shank. That's the usual, but no doubt there could be different methods of identification...

If there are no suggestions about Sherline machines in your area, consider a similar sized equivalent in the Peatol. Readily available from the UK - If you don't mind dealing with 'the enemy!' http://peatol.com/ Dave The Emerald Isle

I've just had a look at the PM Research site and the Red Wing engine. Normally, the flywheel diameter is the limiting factor for lathe work. Other bulky bits would be machined on the mill. However, without the use of a milling machine, you would need to hold the crankcase on the cross slide...

Good choice. I see that this engine has been modelled in GrabCad. Free CAD Designs, Files & 3D Models | The GrabCAD Community Library! May be of some use to you. Dave The Emerald Isle

And it is? Dave The Emerald Isle

For a good selection of bar stock engines requiring differing abilities to make, have a look at Elmer's engines. There are over 50 designs to choose from. http://john-tom.com/html/ElmersEngines.html Dave The Emerald Isle

You may have to go for a larger round bar and machine it down to get the size you require. Look at eBay UK for price comparisons and then look at model engineering suppliers. Search for something like 'Model Engineering suppliers UK'. Make sure you are sitting down when you see the prices +...

Zeb Just what was written in Model Engineer magazines of the period -1940s to about 1960s Dave The Emerald Isle

Elmer Verburg was a prolific small engine designer and builder in times when the majority of model engine builders' workshops were quite basic. His designs reflected the difficulty of very accurate measurement. If you download Elmer's designs from John Tom Elmers Engines Steam Engine Plans...

I needed to make some washers with one concave side. The easiest way was to use a fly cutter to scallop out the concave face on the end of a bar. So, a piece of 1-1/4" bar was quickly fashioned into a fly cutter using a piece of 3/16" HSS as the cutter. Only when it was finished and inserted...

I remember somewhere, some time ago that a trick to check the throat size required when using propane was to cover the air inlet of the carb with something like masking tape. Pierce the tape and enlarge the hole at each starting attempt until the engine runs. That last hole in the tape will...

There used to be a cigarette manufacturer that had the picture of its product producer on the packet. Dave The Emerald Isle