Electric Power Required For Various Speeds

Discussion in 'General Questions' started by boyntonstu, Jan 31, 2015.

  1. boyntonstu

    boyntonstu Member

    Power Required For Various Speeds

    A differing summation of watts required for a mountain bike to maintain various speeds.

    *5mph = 22w
    10mph = 68w
    15mph = 163w
    20mph = 333w
    25mph = 601w
    30mph = 993w
    35mph = 1532w
    40mph = 2247w
    45mph = 3147w
    50mph = 4280w
    * from ebike.ca simulator

    30mph requires almost precisely 300% the energy as 20mph.
    Of course, it does not require 3x the energy per mile.
    163w/15mph = 10.86wh/mile
    333w/20mph = 16.66wh/mile
    993w/30mph = 33.1wh/mile
    Still 30mph require 2x the energy per mile, or ...
    Same ~36V 10Ah battery ...
    15mph = 30+ mile range or - 92.08 miles per kWh = 6 hour cruise time
    20mph = 20 mile range or - 60.02 miles per kWh = 3 hour cruise time
    30mph = 10 mile range or - 30.21 miles per kWh = 1 hour cruise time
     

  2. boyntonstu

    boyntonstu Member

    Work of art homemade battery!

     
    Last edited by a moderator: Dec 15, 2015
  3. boyntonstu

    boyntonstu Member

    Cheap and dirty battery:

     
    Last edited by a moderator: Dec 15, 2015
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