Side Valve IC engine

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NormanV:
I've finally got back to this engine. I cleaned up the feet and drilled the mounting holes and then mounted it on the faceplate. I put a wooden bung in the top of the cylinder to aid lining it up and then faced the top.
Tomorrow I need to make the final cut to obtain a good surface.
To bore it I'm going to use a piece of 25mm Dia BMS bar as a boring bar. I've got to go in 120mm and I think that my 12mm boring bar will be too flexible with that much overhang.

vtsteam:
You're coming along, Norman! :clap: :beer:

NormanV:
I've finally made some progress with this engine. I have cast the cylinder head and the cover. Here are the patterns.

NormanV:
The cover is a simple casting as it has a flat bottom.
I have often been dismayed at the time my furnace takes to melt the aluminium, I have been too embarrassed to quote my times but for this casting I only had to melt 1kg of metal and it was liquid in 20 minutes so there is obviously nothing wrong with the furnace it is just that previously I have been melting 3-4 kgs which usually takes an hour.

NormanV:
The cylinder head was a bit more complicated as it has recesses on both sides plus the boss on the end produces an undercut. I thought that I would get around that by making a board with a cut out to cover the undercut. There was a bit of a gap between the board and the pattern, I had no putty or plasticene to plug the gap so I made a flour and water dough which did the job admirably.

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