Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Made the valve rod, valve and nut.
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Then on to the eccentric rod. I dismantled the engine so I could get the eccentric off to ensure the profile of the brass retaimer/follower was correct.
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I cleaned all parts before reassembly.
Then I turned the rod from 8mm bar which gave me the size at the end needed for the pivot.
Made the pivot block next.
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Then a trial fit up to set the lengths and sizes etc.
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With everything looking good all covers were fitted.
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Then curiosity got the better of me and I gave it a trial run on air. A short, rather poor quality video follows.



I have exhaust3d my current supply of 7BA bolts so there are heaps of air leaks. Also as I have not decided whether to go with o ri gs ,oil grooves or packing, the piston is still a block so there will be blowby.
And I am not wholly comvinced that the timing is right despite the detent for the eccentric lock screw.
Anyhoo it works and there is a lot of fettling, fiddling, and finessing still to do.