amphibian

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

  1. rick gray
    Joined: Dec 2012
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    Location: port coquitlam B.C.

    rick gray Junior Member

    latest photos of my project.I may have to add trim tab/tanks at transom to get stern draft down and compensate for mid engine weight
     

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    Last edited: Sep 24, 2015
    1 person likes this.
  2. Squidly-Diddly
    Joined: Sep 2007
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    Location: SF bay

    Squidly-Diddly Senior Member

    how do you plan on getting power to wheels from engine, and how big an engine?

    I've always thought that Harley-Davidson belt drive gear could be used to get power over the side without any through-holes in the hull, and it should be OK in water.

    what ratio of land VS water is the design intent?
     
  3. rick gray
    Joined: Dec 2012
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    Location: port coquitlam B.C.

    rick gray Junior Member

    Squidly
    : some photos for you . it is a 350 V8, powering a shirty power glide, driving a dana 18 transfer case, that shifts between rear axle and jet drive
     
    Last edited: Sep 24, 2015
  4. rick gray
    Joined: Dec 2012
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    Location: port coquitlam B.C.

    rick gray Junior Member

    photos of amphibian drive train for SQUIDLY?

    photos of drive train. 350 chev, shorty power glide, dana 18 transfer case, jet drive
     

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  5. Squidly-Diddly
    Joined: Sep 2007
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    Location: SF bay

    Squidly-Diddly Senior Member

    but what about the drive to the (I'm assuming only rear) wheels?

    PS-see my gallery for my motorcycle/pwc concept.
     
  6. rwatson
    Joined: Aug 2007
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    Location: Tasmania,Australia

    rwatson Senior Member

    Bugger ! Thats going to be expensive to have raised from the bottom of the local harbour :)
     
  7. whitepointer23

    whitepointer23 Previous Member

    The rear drive axle is in the photos squidly. If it was me i would put an outboard on the back and just use the v8 for the road. It is a great project. Looking forward to seeing it finished.
     
  8. myark
    Joined: Oct 2012
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    Location: Thailand

    myark Senior Member

    Hi Rick

    Still go the tiger by the tail I see.

    Its a good learning lesson on what not to do and can see one way or another you will complete the project like you have the modification of other vehicles you have turned into a work of art.
     
  9. rick gray
    Joined: Dec 2012
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    Location: port coquitlam B.C.

    rick gray Junior Member

    Digest this You must be the product of remarks like this? where have I gone wrong? it will float, but like you performance is the question. Rick
     
    Last edited: Sep 25, 2015
  10. Squidly-Diddly
    Joined: Sep 2007
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    Squidly-Diddly Senior Member

    Still not getting how that standard rear axle is go through the hull and not leak.
     
  11. rick gray
    Joined: Dec 2012
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    Location: port coquitlam B.C.

    rick gray Junior Member

    Leaks/seals

    the rear axles are live, (independent style) the differential center section( Cadillac suv) has a fabricated sealed tunnel with boots ,the live axles have stuffing boxes(like inboard shaft seal) and are also rubber booted to tunnels like power rack and pinion style Also the tunnels can be pumped with low pressure air to hold water out. same for power steering rack
     
    Last edited: Sep 25, 2015
  12. rick gray
    Joined: Dec 2012
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    Location: port coquitlam B.C.

    rick gray Junior Member

    power rack ands pinion /axle seals

    amphibian axle seals
     

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  13. tom kane
    Joined: Nov 2003
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    Location: Hamilton.New Zealand.

    tom kane Senior Member

    It must be terribly frustrating for people interested in boats and such like and not being able to get stuck in and build something different for you self.

    the best part is taking them apart and turning them into something else.

    Most of the great inventions were not built by the inventors but by clever helpers that had practical skills.
    Go rick gray.
     
  14. rick gray
    Joined: Dec 2012
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    Location: port coquitlam B.C.

    rick gray Junior Member

    Tom; I am that far along on my BIG IDEA that i would find it hard to retreat. I know what it takes ,from past builds. I have a long way to go to see this out. creating something and solving problems, with GREAT EXPECTATIONS??
     

  15. rwatson
    Joined: Aug 2007
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    Location: Tasmania,Australia

    rwatson Senior Member

    I wasn't making a prediction - just considering the downsides based on experience with trying to waterproof complex machinery. Stuffing boxes and boots can be problematic.

    But while we are on the topic, have you planned to stick enough flotation in to give positive buoyancy - at least during initial testing?
     
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