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Recent content by vederstein

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  1. vederstein

    Engine Valves

    It's been so long since I gave up on the Webster, that I don't quite remember the exact steps. I also tried a couple of different methods which all failed. I remember trying spinning the valve and seat in a drill. I remember trying to "coin" the seat with a press. I remember trying to spin...
  2. vederstein

    Engine Valves

    I've been working on my four stroke for some time and the main goal of this engine is that it be easy to make. Think Webster but without the poppet valves. Take a look at the video and let me know what you think. I haven't made it to the ignition yet, and I'm very open to suggestions. ...Ved.
  3. vederstein

    Allis-Chalmers lathe

    A-C also made electrical generation equipment and turbines for hyrdoelectric power plants and such. They were a huge industrial concern.
  4. vederstein

    Modified Coomber Rotary Steam Engine

    I put on a coat of paint on my Modified Coomber steam engine. You can find the plans and CAD models here: https://www.homemodelenginemachinist.com/threads/coomber-engine-ideas.32117/ Here's the finished engine:
  5. vederstein

    Engine Valves

    I wonder why these alternative valving mechanisms didn't hold up? That Condor engine seems like a four stroke version of a Corliss steam engine valve. It seems very simple to me with the valving being one rotating assembly. Perhaps carbon buildup and/or compression leaks were an issue? I do...
  6. vederstein

    Engine Valves

    The valve design of the RCV engine I like quite a bit. Based on this I think my ideas may have some merit. I'm going for simple, not exotic. Therefore, when I get into the design work, I'll have to keep in mind of the valving. If one valve technology is a bust, then I need to design the...
  7. vederstein

    Engine Valves

    I've done enough Steam and Stirling engines that I think I'm going to try my hand at a four stroke gas engine again. My first experience was a Webster where I failed to get the thing running. My question revolves around valves. Why always poppet valves? I had a hell of a time getting the...
  8. vederstein

    Coomber Engine Ideas

    In the 1800s the Coomber was a real engine, but there is a reason why it doesn't exist anymore. So yeah, at this time it's a novelty.
  9. vederstein

    Coomber Engine Ideas

    Sealing?!?!?! This thing leaks all over the place. It was more important to have it freewheeling than well sealed. It doesn't have a lot of power, so it cannot have much drag. I'm sure the design can be improved, but it's a first of its kind.
  10. vederstein

    Popular Mechanics 1963 engine

    Simple engines can be satisfying too. Great job! ...Ved
  11. vederstein

    Coomber Engine Ideas

    1952 MG TD Ive had it about three months now. It's my "unicorn."
  12. vederstein

    Coomber Engine Ideas

    The 3D solid model and casting patterns for the Inverted Coomber engine:
  13. vederstein

    Coomber Engine Ideas

    Now for the part drawings:
  14. vederstein

    Coomber Engine Ideas

    I've managed to get my inverted Coomber prototype running. It's not particularly pretty, but it does run. Here's the final design. First the design assembly files:
  15. vederstein

    Wood Base Finish

    David, How many projects do you have going on at once?!?! ...Ved.
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