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Thread: Catavolt: Interview with Jon Eggenhuizen

              
   
   
  1. #1
    teddillard
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    Catavolt: Interview with Jon Eggenhuizen

    Great instructional interview with some very detailed build detail type stuff, also Mark's motor at the end:

    Last edited by teddillard; 24 March 2011 at 0624.

  2. #2
    Moderator Nuts & Volts's Avatar
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    Cool video. The bike is super simple in a good way. Only complaint is that they definitely have more room for batteries. But then again the headways are not the easiest to fit in the nocks and crannies.

    thanks Ted
    Whats under my tank may shock you!!! R6 Build, Blog/, [/URL] OSU Current webpage

  3. #3
    Senior Member markcycle's Avatar
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    Jon sent me some statistic on how the bike performed and basic bike specifications
    These are Jon words

    we had a top speed of 155kph on a Race track(Eastern creek @40% power).
    We have the lap record at wakefield only 5 sec of the two strokes 10 sec of the superbikes @35% current limit.
    Catavolt only had 4.3kwh others had 6.5 and 8kwh of battery.
    The hub motor didnt hinder cornering at all just needed an adjustable rebound shock.
    Catavolt bike weight 190kg voltron 170kg riperton 145kg

    And my favorite picture
    Trying to Change the old school ways of doing things
    But I never Never try to break the laws of Physics
    http://www.enertrac.net
    http://www.evalbum.com/preview.php?vid=1543
    http://www.youtube.com/watch?v=nEldNmBgIF0
    http://www.evalbum.com/2568

  4. #4
    Member evmotorcycle's Avatar
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    Heat Dissipation

    Hey guys,

    Heat is the enemy of the electric motor! Catavolt, Voltron and Ripperton teams all battled with the same problem. Keeping the motor cool. There were a few issues with controllers etc but the main problem was heat in the motor. If Catavolt had a better mechanism for dissipating the heat then I am betting that it would have smoked the 125 lap times for sure.

    So that's where markcycle comes in. You gotta get some liquid in there dude! >
    Get your spanners out and start building those electric motorcycles...

  5. #5
    Moderator Nuts & Volts's Avatar
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    Quote Originally Posted by evmotorcycle View Post
    Hey guys,

    Heat is the enemy of the electric motor! Catavolt, Voltron and Ripperton teams all battled with the same problem. Keeping the motor cool. There were a few issues with controllers etc but the main problem was heat in the motor. If Catavolt had a better mechanism for dissipating the heat then I am betting that it would have smoked the 125 lap times for sure.

    So that's where markcycle comes in. You gotta get some liquid in there dude! >
    True dat, either cool the **** out of it...or make it more efficient
    Whats under my tank may shock you!!! R6 Build, Blog/, [/URL] OSU Current webpage

  6. #6
    Senior Member markcycle's Avatar
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    No matter how efficient you make the motor these guys will just pump more and more amps into it and we'll wind up having to get rid of the same or more heat. It's an endless circle until the motor is no longer the weak link in the power chain and just improving the efficiency a few percent not going to do it. So I agree liquid cooling for next year, gets the motor out of the thermal loop. After all it's what all the big boys in racing are doing, every high end bike is liquid cooled.

    Let me add if all goes as planed a 20 to 30 percent weight reduction is also possible
    Last edited by markcycle; 14 October 2011 at 0527.
    Trying to Change the old school ways of doing things
    But I never Never try to break the laws of Physics
    http://www.enertrac.net
    http://www.evalbum.com/preview.php?vid=1543
    http://www.youtube.com/watch?v=nEldNmBgIF0
    http://www.evalbum.com/2568

  7. #7
    Moderator Nuts & Volts's Avatar
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    Quote Originally Posted by markcycle View Post
    No matter how efficient you make the motor these guys will just pump more and more amps into it...
    Totally agree about the increase in amps. So one way or another you'll need some liquid cooling when going racing

    Quote Originally Posted by markcycle View Post
    Let me add if all goes as planed a 20 to 30 percent weight reduction is also possible
    Sweetness!

    Totally agree about the increase in amps. So one way or another you'll need some liquid cooling.
    Whats under my tank may shock you!!! R6 Build, Blog/, [/URL] OSU Current webpage

  8. #8
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    Quote Originally Posted by markcycle View Post
    Jon sent me some statistic on how the bike performed and basic bike specifications
    These are Jon words...

    Catavolt only had 4.3kwh others had 6.5 and 8kwh of battery.
    .....
    Catavolt bike weight 190kg voltron 170kg riperton 145kg
    Curious that the heaviest bike has the least battery (kWh). Any info as to why? Cell energy density? Heavier motor? Heavier donor bike to start with?

  9. #9
    Senior Member markcycle's Avatar
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    Basicly LIFEPO4 Headway VS foil pouch cells

    Round steel cans don't package very well
    Look at the naked bike and all those cells and it ads up to 4.3Kwh Kinda answers the question. I think 4.3Kwh is with the cells removed from under the seat.
    Trying to Change the old school ways of doing things
    But I never Never try to break the laws of Physics
    http://www.enertrac.net
    http://www.evalbum.com/preview.php?vid=1543
    http://www.youtube.com/watch?v=nEldNmBgIF0
    http://www.evalbum.com/2568

  10. #10
    teddillard
    Guest
    I'm pretty sure the Headways are heavier, too, for the energy of the lipo (at least one of the other bikes is running lipo, no?), to the tune of about 30% if memory serves. I'd have to look it up...

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