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Shock absorber/Suspension advice (bike project)

  1. Jun 12, 2009 #1
    After reading an article a few weeks ago about a man who had made a bicycle with a triangular & pentagonal wheel & started doing some reading on the shapes.

    Made a model of it but would like to try & make a full size one as we realised that it needs some parts that I couldnt make out of plywood in a little model.

    Been thinking how to make it stable & came up with the idea of putting a roller on top of the wheel which is always in contact & fixed to the headstock. This will move the front of the bike up & down.

    Next, the bike forks would be mounted on a hinge allowing free movement. I would weld some sort of shock absorber inbetween the fixed roller & the hinged forks which I would aim to make to be able to counteract the up & down motion of the wheel/frame if it is possible.

    Any ideas whether this concept might work & any ideas for a shock absorber would be appeciated as I have no expecience with this sort of thing.

    Currently doing AS physics in college & my teacher challenged me to make a model which has made me want to make a real one so I can try & overcome the problems.

    Starting work on how to make the back stay level now as the article & pictures didnt give much of an insight.

    Want something good to put on my personal statement too as I am applying for a physics degree this year.

    If I could get it made, the aim then would be to put some dynamos on the wheels to charge a powerpack & make some sort of dashboard with lights, speedo etc on haha! Really getting into the subject & want to try some projects.

    Any help is appreciated.

    Thanks alot

    James
     
  2. jcsd
  3. Jun 13, 2009 #2
    Can you post or link to some sketches or photos?

    A conventional "shock absorber" will not counteract movement. It will only dampen sudden movement.
     
  4. Jun 13, 2009 #3
    Any shock absorber wastes energy. In the case of those funny wheels, it'll be a LOT of energy. You'll be sweating hard after the first 100 meters.
     
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