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Thread: Petrol Engine Question

  1. #11
    I'm quite interested to see how this concept pans out having built
    a petrol engined spinner myself for the series 6 of Robot Wars (auditions)
    My spinner was a vertical but was more like a steel proppellor blade
    and spun in front of the robot as such, it was running off a briggs
    n stratton lawnmower engine which drove a heavy hub disk brake
    and 50mm thick steel proppellor and a grinder addition.
    I'm interested in how you intend to keep it running upside down
    ie when its flipped, how you will cope with the fuel limitations 200ml
    I think-you will need a Rc controlled electric start because its bound
    to stall, It will have to be braked and if its not automatic you will need
    a way to operate the clutch.
    Interesting prospect but not an easy build.

  2. #12
    Roboteer

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    Having looked at Hardox tubing for Deadlock the minimum order was like a kilometer or two.

  3. #13
    Andy's Avatar
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    Andy Russell
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    Always good to have spares Rob

  4. #14
    200ml of fuel= 1.78Kw of energy. Efficiency of a small 2 stroke petrol engine, 20%= 450W used for the disk.

    Small customized 5Hp petrol engine + fueltank+ electric starter = +/-10 kg.

    5Kw electric motor+ 12S 10 000mAh batteries*+ ESC= 7kg.

    *Almost 450W, comparable to the usable power of the fuel.

  5. #15
    overkill's Avatar
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    Nick Martin
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    And the electric motor happily runs upside down.

  6. #16
    And is a lot smaller.
    And is allowed on most events (where spinners are allowed)

  7. #17
    Rapidrory's Avatar
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    Rory Mangles
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    Yeah but more importantly electric motors aren't nearly as cool..

  8. #18
    Do a "Tesla Brabus" and install a soundsystem to make the noise.

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