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Thread: Aero & rolling resistance computer

  1. #1
    Senior Member
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    Aug 2010
    Pacifica, California
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    Aero & rolling resistance computer

    Someone might find this site useful, or at least interesting. Apparently, you can plug in various values for your vehicle and it will calculate its rolling resistance and power needed to achieve various speeds: http://ecomodder.com/forum/tool-aero...resistance.php
    Richard - Current bikes: 2018 16.6 kWh Zero S, 2016 BMW R1200RS, 2011 Royal Enfield 500, 2009 BMW F650GS, 2005 Triumph T-100 Bonneville, 2002 Yamaha FZ1 (FZS1000N) and a 1978 Honda Kick 'N Go Senior.

  2. #2
    Join Date
    Sep 2019
    S.F. Bay Area
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    That doesn't look quite accurate. Rolling resistance isn't constant, it goes up linearly with speed. Unless they don't consider bearing-drag part of rolling resistance?

    Of course as speeds increase, rolling resistance becomes negligible compared to wind-resistance, which increases by xquare-power of speed. And power required to overcome that wind-drag goes up by cube-power of speed.
    Last edited by DannoXYZ; 28 September 2019 at 1355.

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