Fast Build Scale Model

Discussion in 'Projects & Proposals' started by rwatson, Dec 11, 2011.

  1. Jim Caldwell
    Joined: Aug 2013
    Posts: 266
    Likes: 8, Points: 18, Legacy Rep: 48
    Location: Cleveland, Ohio

    Jim Caldwell Senior Member

    I will be interested in your outboard design, I took a look at it 15years ago. The problems then were, I needed a cheap airfoil about 2" cord that could take 2 or 3 kg. thrust and a set of small diameter 90 degree gears for the prop shaft. At the time I could not find the airfoil and didn't want to build one. I did find some pressed metal gears form RC 'Pan" cars that might work.
    Today maybe a hollow helicopter blade may work for the foil leg?
     
  2. rwatson
    Joined: Aug 2007
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    Location: Tasmania,Australia

    rwatson Senior Member

    I am going to build the assembly he way I built slot cars - soldered copper tube and sheet. Then I will cover it with epoxy balloons, sand it to shape and final epoxy coat.

    I don't think the accuracy of the foil is critical as most of it is out of the water.
     
  3. Jim Caldwell
    Joined: Aug 2013
    Posts: 266
    Likes: 8, Points: 18, Legacy Rep: 48
    Location: Cleveland, Ohio

    Jim Caldwell Senior Member


  4. rwatson
    Joined: Aug 2007
    Posts: 5,852
    Likes: 290, Points: 83, Legacy Rep: 1749
    Location: Tasmania,Australia

    rwatson Senior Member

    yeah, belt drives have an appeal, but the engineering to support them is more difficult. In a model, getting a belt drive to drive the prop makes the shaft build more difficult.
     
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