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  1. #1
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    An unfortunately stupid question about timing

    I'm interested in improving my flying 200 time. Is there a way I can time my own 200, without the help of a training buddy? Currently, I can only think of two options, but none of them seem to be very accurate and/or streamlined.

    One option is a wristwatch with a timer function, but that requires you to reach over to your other wrist and press a rather small button. Doesn't seem very accurate, either.

    The other option is to have a cyclocomputer with a timer function, but I'm having a hard time finding a good one. Plus, I already spent money on a cyclocomputer so I'd really rather not buy another one.

    Any thoughts?

  2. #2
    Senior Member bitingduck's Avatar
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    Two arduinos, an RF Tx/Rx pair, and a couple of tapeswitches. All together should cost a bit more than a nice stopwatch. You can charge your friends for times to recoup the cost.

    And if you're in Cupertino you can't swing a chainwhip without hitting someone who can make that work for you if you can't do it yourself...
    Track - the other off-road
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  3. #3
    Elitist carleton's Avatar
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    Quote Originally Posted by Vaio_s View Post
    I'm interested in improving my flying 200 time. Is there a way I can time my own 200, without the help of a training buddy? Currently, I can only think of two options, but none of them seem to be very accurate and/or streamlined.

    One option is a wristwatch with a timer function, but that requires you to reach over to your other wrist and press a rather small button. Doesn't seem very accurate, either.

    The other option is to have a cyclocomputer with a timer function, but I'm having a hard time finding a good one. Plus, I already spent money on a cyclocomputer so I'd really rather not buy another one.

    Any thoughts?
    Top speed is directly related to flying 200M time. So much so that I've created mathematical models (read: Excel spreadsheets) that make some decent attempts to define the relationships for specific tracks. I can guess my flying 200M time to within 0.1 - 0.2" based on the top speed that my computer records.

    To track your progress, track your top speed during Flying 200M practices using a basic $35 computer. Record it then reset it before new efforts. If your top speed is faster than your F200M time will be faster and vice-versa.

    The next step is to compare those top speeds to the top speeds you reached when you had someone timing you.

    You will come to conclusions like:
    - To ride 12.0" Flying 200M I have to reach a max speed of 39mph on this particular track.

    Then you start looking for 39mph or faster in practice.
    Last edited by carleton; 07-21-11 at 11:35 PM.
    Quote Originally Posted by gtrob View Post
    Roadies can run tempo all year as that's what humans were designed for. If you want to be a cheetah, lay around and lick your paws more.

  4. #4
    Elitist carleton's Avatar
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    Quote Originally Posted by bitingduck View Post
    Two arduinos, an RF Tx/Rx pair, and a couple of tapeswitches. All together should cost a bit more than a nice stopwatch. You can charge your friends for times to recoup the cost.

    And if you're in Cupertino you can't swing a chainwhip without hitting someone who can make that work for you if you can't do it yourself...
    Ha! Looks like I have a new project.
    Quote Originally Posted by gtrob View Post
    Roadies can run tempo all year as that's what humans were designed for. If you want to be a cheetah, lay around and lick your paws more.

  5. #5
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    Hmmmm... so at this point, you're saying I should just try improving my top speed, and worry about my times later?

  6. #6
    Senior Member bitingduck's Avatar
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    Quote Originally Posted by Vaio_s View Post
    Hmmmm... so at this point, you're saying I should just try improving my top speed, and worry about my times later?
    Both, because the line matters a lot in a flying 200. You don't want to develop high speed and a habit of taking a bad line at the same time. Improve them both together.
    Track - the other off-road
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  7. #7
    Senior Member bitingduck's Avatar
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    Quote Originally Posted by carleton View Post
    Ha! Looks like I have a new project.
    It's easier to do with one arduino and a lot of wire, but I suspect the wire might cost more than the second arduino+rf set. I also picked up a temperature compensated clock, but it doesn't read milliseconds-- It has a 32kHz oscillator that you have to count and reset every second to get milliseconds, and I haven't had time to play with that yet.
    Track - the other off-road
    http://www.lavelodrome.org

  8. #8
    Elitist carleton's Avatar
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    Quote Originally Posted by bitingduck View Post
    It's easier to do with one arduino and a lot of wire, but I suspect the wire might cost more than the second arduino+rf set. I also picked up a temperature compensated clock, but it doesn't read milliseconds-- It has a 32kHz oscillator that you have to count and reset every second to get milliseconds, and I haven't had time to play with that yet.
    Man, that's so over my head. I'm not an electronics geek, but I'm open to learning. I have a good friend that's an EE that maybe can help me.
    Quote Originally Posted by gtrob View Post
    Roadies can run tempo all year as that's what humans were designed for. If you want to be a cheetah, lay around and lick your paws more.

  9. #9
    Senior Member bitingduck's Avatar
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    Quote Originally Posted by carleton View Post
    Man, that's so over my head. I'm not an electronics geek, but I'm open to learning. I have a good friend that's an EE that maybe can help me.
    Start with http://www.arduino.cc/ and read a little bit. An EE should be able to make it work in a few minutes (for real).

    The development environment is easy to install and use, and a single arduino plus a pair of tapeswitches should be easy to do by modifying examples from the web, even with no prior experience. There are also a couple systems available (designed for motorcyclists) that use IR beams for ~$300-$400, but the beams don't work well with bicycles-- too much empty space.
    Track - the other off-road
    http://www.lavelodrome.org

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