If you have the confidence to do the machining but nothing too demanding or critical, the Stuart Progress is even simpler than the 10V and makes a much nicer looking model than most of the 'basic oscillating' engines out there.

Neil

Hemmingway's engines need machining. They are very nice but quite complex models.

Im in a similar position as the OP.
I assume you domt have a milling machine?
I dont either, cant even mill or bore on my lathe.
Are any of the stewart kits machinable with just a lathe?

Dont mean to jump in on your thread, but I think im in the same position as you.

My cross slide is not t slotted so id have to be trying to mount in place of the tool post.
that means id only have the single tool post bolt to mount the vertical slide and the lowest point would only be 12mm below center.

I have a tabletop Flexispeed horizontal milling machine ,again a bit delicate in places but small cuts!and the smallest vertical slide I could find,unimat apart-too costly, which just fitsthe lathe

Could you use clamps?

You do not mention Greame the size of the lathe you have, but on my website there is a very detailed explanation of how to machine both Stuart H10 and V10 engines using just a lathe plus a drilling machine, and even gives a suggestion how to manage without a drilling machine.

The lathe being used is a Hobbymat MD65 having a 65mm centre height. It does not have a T slotted cross slide or a vertical slide available for milling. The pages can be found here

If you wish to use a vertical slide then you should go for a toolmakers style vice. The reason for this is that you can uses the vice's mounting method to move the workpiece into place for machining the part, leaving the full vertical slide traverse for the machining operation.

The vices offered for use on vertical slides are in my estimation ridiculous as they only hold very small parts and can only be mounted in a limited number of fixed positions. See my pages here In particular, see photographs 4 and 5 on the third page which shows the situation even exists on the long standing vertical slides for the Myford. It is about time, in my estimation, that some common sense was applied to the situation for the owners of vertical slides and very small milling machines. If one has purchased a very small lathe then you do not want the accessories to limit its capacity ever further.

Harold

A Unimat three will machine a Stuart 10V. Back in the day my U3 came with a set of castings and a book with metric dimensions. However, it is a bit of a stretch, and I had the milling attachment, which gives more travel than a vertical attachment and a reasonable size table. This makes things like drilling and machining the bed and the box bed easier. I don't think you would do them on a Unimat size lathe without the milling attachment. Something a bit bigger would be needed. The U3 is 46mm centre height…the 65 mm on Harolds Hobbymat would make things a lot easier.

John