Recent Content by Jim Marc

  1. Jim Marc
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    Considerations of one or two propellers

    Thanks jehardiman, So there are effort lost even if 2 person are pedalling the vessel (probably recumbent seated distance apart ) with 2...
    Post by: Jim Marc, Mar 19, 2014 in forum: Props
  2. Jim Marc
    Post

    Considerations of one or two propellers

    Hi, I am new here, I thought about this 1 or 2 propeller thing but the idea is a tandem style with 2 person pedaling independent simple chain...
    Post by: Jim Marc, Mar 18, 2014 in forum: Props