Opposed 4 Air(craft) Engine

Discussion in 'Finished Projects' started by cfellows, Dec 8, 2010.

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  1. Dec 14, 2010 #21

    ToniTD1490

    ToniTD1490

    ToniTD1490

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    Congratulations, look very well, the plans in metric isn't it?


    Cheers,
    ToniTD1490







     
  2. Dec 15, 2010 #22

    gbritnell

    gbritnell

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    Hi Chuck,
    Now that is really unique!! As has been stated, what a sound. I'd swear it sounds just like an aircraft engine.
    Great work as usual.
    George
     
  3. Dec 15, 2010 #23

    Royal Viking

    Royal Viking

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    Nice work! Love the sound! :)
     
  4. Dec 15, 2010 #24

    Lakc

    Lakc

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    Great work Chuck. Even more impressive once I figgured out my adblocker was blocking the video. I couldnt figgure out why everyone was so impressed with the sound of a few pictures. :big:
     
  5. Dec 15, 2010 #25

    bentprop

    bentprop

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    Chuck,all i can say is "WOW".I doubt I will ever accumulate enough skill to build something like this,but in the meantime I enjoy watching others efforts.
    It just sounds so sweet.Congratulations,Chuck,you're a legend :)
     
  6. Dec 15, 2010 #26

    metalmad

    metalmad

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    HI Chuck
    is that a fabricated display prop ?with no pitch?
    looks a bit like aluminum from the pics ( I don't Trust my eyes even with my new glasses lol)
    nice job :)
    Pete
     
  7. Dec 15, 2010 #27

    shred

    shred

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    That's Chuck's Solid-Steel-Prop-O-DeathTM ;D ;D Nobody was willing to try and stop it at the demo.

    as seen here: http://www.homemodelenginemachinist.com/index.php?topic=3677.msg86531#msg86531

     
  8. Dec 15, 2010 #28

    Brass_Machine

    Brass_Machine

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    Very nice Chuck! Love boxer style engines. Very very nice.

    Eric

    **going to catch up on the build thread now.
     
  9. Dec 15, 2010 #29

    compspecial

    compspecial

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    Its a beauty, chuck, and sounds almost full-size I love the 4blade metal prop too!
    but how does the inlet system work? is it a rotary valve?
     
  10. Dec 15, 2010 #30

    cfellows

    cfellows

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    Yes, it's a rotary valve. The air coming in the back of the engine is fed into the hollow camshaft. As the camshaft turns, the air is directed through one of 4 holes in the side of the cam into the curved brass tubes leading to the cylinder heads. There is a spring loaded ball bearing in the head that is normally pressed up against inlet port and allows (exhaust) air from the cylinder to exit through the exhaust port on the underneath side of the head.

    [​IMG]

    When the high pressure air from the cam hits the top side of the ball bearing, it pushes the ball bearing down, which seals off the exhaust port and allows high pressure air into the cylinder.

    Chuck
     
  11. Dec 15, 2010 #31

    compspecial

    compspecial

    compspecial

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    Thanks Chuck, it really is an ingenious system!!
     

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