Page 15 of 55 FirstFirst ... 5131415161725 ... LastLast
Results 141 to 150 of 544

Thread: A different opposed piston engine--

  1. #141
    Join Date
    Dec 2009
    Location
    Stevens Point, WI
    Posts
    4,753

    Default

    I am excited! For many years I had an idea of an opposed engine along the same lines of what you have came up with and was curious how it would run and what it would output.
    Andy

  2. #142
    Join Date
    May 2006
    Posts
    8,778

    Default

    It's turning out to be a very cool looking Model Brian,
    Your keeping so many things open for viewing and that's what a good working model should have,

    Many of us engineer types are hardwired to build things as structurally sound and with the least amount of materials and pieces and machining possible - which is an entirely different juggling act in itself,

    And there is no doubt that your unit could be built twice as strong at close to half the weight, but it's not a production unit and its meant for viewing, and with that in mind I say Bravo, well done and it really is a great looking little engine...

    It will be neat to see the U-tube vid on this one

  3. #143
    Join Date
    Mar 2008
    Location
    Barrie, Ontario, Canada
    Posts
    4,721

    Default

    Thanks Guys. Its positive comments like that that help to keep me going!!!---Brian

  4. #144
    Join Date
    Jan 2010
    Location
    Kansas City area
    Posts
    3,182

    Default

    I agree with A.K. Can't wait to see it run!

  5. #145
    Join Date
    Mar 2008
    Location
    Barrie, Ontario, Canada
    Posts
    4,721

    Default

    As promised yesterday, here is the first assembly, consisting of the crankshaft, flywheel, and all but one of the frame components (the plate the cylinders attach to). I set my glasses in the foreground to give a sense of scale on this engine. Its not very big!!! So far, so good. The parts all fit together. (I don't have the crankshaft bushings in place because I haven't made them yet!!!)-----Brian




  6. #146
    Join Date
    Mar 2008
    Location
    Barrie, Ontario, Canada
    Posts
    4,721

    Default

    Okay jwcnc--I have a place to mount the two bits you are making for me!!! I haven't put the snap ring grooves in yet.---Its safer to wait and get everything mounted BEFORE cutting the snap ring grooves. I have also mounted the camshaft. That's enough for me for today.---Brian

    Last edited by brian Rupnow; 12-30-2013 at 03:06 PM.

  7. #147
    Join Date
    Mar 2008
    Location
    Barrie, Ontario, Canada
    Posts
    4,721

    Default

    There will definitely be some head scratching involved with making this part!!!


  8. #148
    Join Date
    Mar 2008
    Location
    Barrie, Ontario, Canada
    Posts
    4,721

    Default

    Today I had to go down to my "nut and bolt" store to pick up the 3/8" socket head capscrews that hold the cantilevered pivot shafts and camshaft into the main vertical support plate. While I was there I asked the sales guy if they carried any of the "low head" style of capscrews. He did, and the head on them is roughly 0.180" shorter than the head height on a standard 3/8" shcs. He didn't have any 5/16" shcs in that style, but he did have some 5/16" flat head capscrews. So---I bought them and installed them this afternoon. This allows me to move the flywheel in 0.185" closer to the main support plate. I will have to cut that much off the long hub on the flywheel, but that will still leave me room for a couple of set screws. I like this much better, allowing me to keep the flywheel tucked in tighter to the main vertical support plate.


  9. #149
    Join Date
    May 2009
    Location
    Canada
    Posts
    1,468

    Default

    Those 5/16" flat head capscrews look like what I
    used to refer to as Stripper Bolts when purchasing
    from an Unbrako distributor.

    Edit: I see Unbrako describes these as Shoulder
    Screws in their catalog these days.

    Edit II: My mistake.

    I looked up the thread and saw a previous image
    that made clear that what appears to be the
    shoulder and thread of a shoulder screw in the
    last photo are actually portions of stand-offs
    machined by Mr Rupnow.

    .
    Last edited by EddyCurr; 12-31-2013 at 03:45 PM.

  10. #150
    Join Date
    Mar 2008
    Location
    Barrie, Ontario, Canada
    Posts
    4,721

    Default

    Eddy--No, the bolts I use are just a standard 3/8"-16 socket head cap screw with an extra low head. The part you see sticking out the far side of the vertical plate is my cantilevered pivot shaft. I know that "shoulder bolts" and stripper bolts" look like what I have shown, but in this case its not the case.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •