Hi Graham. I am intrigued. Without any drawings,how did you build in the first place? Did you scale down the measurements from a full size engine?
Dear Ray.
No intrigue as such, engine number 193, an 1892 Hornsby Akroyd 2. 1/2 HP was owned by a friend of mine. He let me keep it ( under serious security ) for a year. I was able to " pattern up " without any disassembly ( another stipulation ) for the subsequent model.
The original engine had quite it's own story, first being shipped out to an agency in South America where it sat for several years un sold. Then shipped back to the UK where it finally got to do some work. But being such a large engine with such a low HP the engine ended up being donated back to the now Ruston Hornsby diesel engine works where it was restored by the training school apprentices in the 1960's.
During the demise of Ruston Hornsby 193 who had sat dormant in the works foyer for many years was acquired by Dr T . Who then sold it on to my friend. Many a happy hour was spent on the northern Stationary engine rally scene, mainly tinkering with " B " thing !!
YES even the full size one could not be left unattended. I felt sure it was cursed,
it would rev up, miss fire, all at the wink of an eye. Imagine what one is like.......... four times smaller !!
In the end, upon a whim, or maybe the money, he sold 193 for a sum in the 10's of hundreds.. Twas tidy, I can tell you !!
Kind regards, Graham.