amphibian

Discussion in 'Boat Design' started by rick gray, Sep 24, 2015.

  1. rick gray
    Joined: Dec 2012
    Posts: 87
    Likes: 4, Points: 8, Legacy Rep: 30
    Location: port coquitlam B.C.

    rick gray Junior Member

    Is it DR. Watson? You have some interesting knowledge. i have thought about neutral bouyance ? i intend on using a thin strong aircraft aluminium for bolt in flooring /tank top for a double bottom I do not have specs on adding floatation material , it would help with condensation and insulation . i have seen spray on commercial materials. i made axle seals with stainless tube and nylon bushings and rubber boots and added grease fittings to pack stuffing boxes at rear axles and at power rack steering unit . ideas and solutions show up from sites like this. i intend to add floatation/ water tanks(portable) onto transom for ballest and to help planing ability which may be adequate ,but not ideal for fuel economy. MANY A TRUE WORD IS SPOKEN IN JEST. you have me thinking twice on some detail/problems about performance issues.
     
  2. rwatson
    Joined: Aug 2007
    Posts: 5,866
    Likes: 299, Points: 83, Legacy Rep: 1749
    Location: Tasmania,Australia

    rwatson Senior Member

    Yeah, it often pays to start from the worst case rather than the optimistic vision. I wonder if the British tv show Top Gear where they launched amphibious cars into the English channel is on youtube? I suppose a formal design engineering calculation process would be ideal to get weight distribution and buoyancy issues sorted. Not every project has that kind of preparation funding available though . I imagine you can probably handle the safety issues off the top of your head as you build, as long as the issue is on your mind.
     

  3. rick gray
    Joined: Dec 2012
    Posts: 87
    Likes: 4, Points: 8, Legacy Rep: 30
    Location: port coquitlam B.C.

    rick gray Junior Member

    hello again WATSON : I was an apprentice ships Plater/ lofts man , and had a design Dutch design draftsman always walk through the full-size loft, we would take some time when he was showing me how to loft an airplane design ships rudder (same as a wing) he also talked about displacement/planing hull design. the one think i did from scratch was to loft the bow of an icebreaker( offsets stopped 6 ft. short of bow,with only drawings of profiles of ice knife) the 3 view full-size new offsets, mylar tracings and templates where sent to pattern maker and foundry. hull was 2" thick at ice knife casting ,it went from keel to main deck in three pieces. over 1ft thick a LWL. .i know I will be moving some tankage ETC. around to balance hull planning attitude
     
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