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

     Thank you Jim and Raphael for the comments and video. I deliberately did not mention the odd detail of only two intakes but three exhausts, as I was wondering if anyone would notice that!

     I can't offer much explanation, but internally the third cylinder is there (and moves as it should), and has at least the upper steam port. I believe that there must be some internal channel that feeds into that third cylinder. Also, if you look at the three exhaust pipes, they are all offset to one side of each cylinder, not centrally located as would be typical. The intake pipe notably does not have any threading to indicate that it was made to accept any solid and permanent source of steam or air. Almost as if it only needed to work briefly, maybe only attached to a steam or air source with a hose clamp. Which might make sense if it was some sort of machinist apprentice "exam" project?

    As for the similarity to the reversing gear, I loved seeing the video, thanks so much for sharing that, I have never heard of that before. You might be right, but since this engine would appear to be a finished project (with a name plate), I can only assume that it is what it was made to be, in its entirety as it is now.

    Here are three more photos that I took shortly after I got this engine, one gives a better impression of the size, compared to a Stuart twin launch and a 10V.

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