DIY Bike and Trike Plans



  • Welcome to Atomic Zombie's Murphy's Moments

    When bad things happen to good builders

    BY RADICAL BRAD, ATOMICZOMBIE.COM

    http://1.bp.blogspot.com/-CJp72aYgzq..." height="249"

    "Perhaps this one was only partly Murphy's Law fault, leaving the other half of the blame to the crazy dude that didn't listen to reason. When I was building the E-Style Electric BMX, I originally put on a pair of front suspension forks from a mountain bike. Now, this might not seem like a bad idea, but if you know a little about electric front hub motors, then you probably know that this is a recipe for a face plant.

    Here is the problem in brief. Front suspension forks have aluminum dropouts. Aluminum is an evil unpredictable metal. Front hub motors introduce heavy torque to the axle. The axle is connected to the dropouts. Eventually, the aluminum dropouts rip away from the fork tubes and you get a very rude and swift introduction to the pavement. Sadly, I knew this ahead of time.

    I never intended to release the plan with these forks, but didn't actually think that such a well-made set of forks would be an issue, so I threw them on for some test riding one weekend. My hub motor was only rated at 500 watts, but I did modify the controller and bump up the voltage from 36 volts to 48 volts, boosting the top speed from about 25 Mph to 40 Mph or better!

    There I was smoking down a street in my neighborhood and I took a sharp turn into the parking lot of the coffee shop I like to visit, trying to look cool as I carved into the lot running under silent electric power. Actually, I did look cool until the exact instant that the front wheel went in a different direction than the rest of the bike!"

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    Comments 4 Comments
    1. Ticktock's Avatar
      Ticktock -
      lets hope that stops anyone else doing it!!!
      Steve G
    1. Gtague's Avatar
      Gtague -
      Ouch, hope your all well Brad; just wanted to mention I bought your book on choppers recently and It has really inspired me to build and make use of the tools I have acquired. I completed my first build a few weeks ago and have you to thank for bringing me in the right direction and leading me to AZ. Thank you.
    1. MrIdaho's Avatar
      MrIdaho -
      great reading. And I myself am friends with Murphy but found as I am advancing in age Murphy is discovered before he has a chance to cause any havoc.
    1. Ticktock's Avatar
      Ticktock -
      After careful study of Murphies Law, which normally seems to predict total uncertainly, we found, that there is a remarkable consistency to Murphies Law!!



      It is consistently inconsistent!
      Steve G
  • Recent Forum Posts

    pegasus

    Re: Is tilting the answer ?

    Hi Paul

    After played the video a few times my impression is

    1 This is not a tilting trike, not even a python. It has a steerer

    pegasus Today, 04:09 AM Go to last post
    Jon_Doe

    Re: Is tilting the answer ?

    Hi Paul.

    I've edited my comment in the meanwhile
    Main reason he fell is the gravel on the road made his front wheel (the only one

    Jon_Doe Today, 03:03 AM Go to last post
    stormbird

    Re: Is tilting the answer ?

    Yes there are several flavours of tilt , his is the only one I know of using a single pivot like that.

    I am unsure about tilt stops , when

    stormbird Today, 03:00 AM Go to last post
    Jon_Doe

    Re: Is tilting the answer ?

    Hi Paul.

    He fell over for a very simple reason : the front wheel, which is the only thing offering some grip and limiting the tilting slipped

    Jon_Doe Today, 02:52 AM Go to last post
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