Three different cycles on my poppet valve engine

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Uploaded by on Dec 6, 2007

My own design of poppet valve engine, running on every fourth stroke, every second stroke and every stroke by changing cams.

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Uploader Comments (blogwitch)

  • so that is a 1 stroke 2 stroke and a 4 stroke?

  • Starting from the first one, 8 stroke, 4 stroke, 2 stroke cycles.

    Each in and out is classed as two strokes.

  • Runs well indeed, like a little clock.

    Is the variable cycle of practical utility, or is it more like a proof of point exercise?

    I confess to being far from comprehension of this elegant little engine.

    Much enjoyed nonetheless!

  • It was built to see if I could simulate a hit and miss engine using air, one lobe cam. Then it occured to me that it could easily be modified to simulate a four stroke and a two stroke. I occasionally display my collection of home builds at steam rallies. So this one hopefully will show basically how the different cycles look and sound like, without all the valve gubbins.

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All Comments (14)

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  • You are the master

  • @blogwitch what is the bennefit of a fireing every stoke or every othe stroke?

    is there a HP difference or a torque difference?

    how would this affect the hp/rpm ratio?

  • It'd be cool if it could "change gears" by going from every stroke to every other stroke, to every 4th stroke.

  • well now its time to test it out for work on a generator and see what it will do.

    if nothing else its a neat toy.

  • Very imaginative., and beautifully made.

  • nice engine, any way to put governer weights on it to make it fire when it slows down like a true hit and miss engine? May have to make a little larger engine though.

  • in air?

  • Sounds coolest when running on every fourth stroke.

  • cool, make a really big one, put it in a motorbike and sell it as the first 8 stroke motorbike, bingo, you're a bazillionaire.

    (give me some of your money when your rich)

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