Simple amphibious micro peddle boat

Discussion in 'Boat Design' started by Silvertooth, Dec 8, 2023.

  1. Silvertooth
    Joined: Nov 2016
    Posts: 113
    Likes: 3, Points: 18, Legacy Rep: 10
    Location: Uk

    Silvertooth Senior Member

    1C415FBE-B79C-48FF-9BFE-79AB4E3DCF85.jpeg I know some will say this is ridiculous but I want to build a sleep pod out of two plastic wheelie bins siliconed together at the tops. Then cut an access hatch and have the hinged lid going over it.

    I want twin wheels just forward of midships and a rear wheel steering/rudder.

    Either hand peddles or a removable bar for foot pedals. It would have to be removed when sleeping in there.
     

    Attached Files:

  2. Silvertooth
    Joined: Nov 2016
    Posts: 113
    Likes: 3, Points: 18, Legacy Rep: 10
    Location: Uk

    Silvertooth Senior Member

    This would be the sort of thing I’m going for inside the sleep pod. So it would be driven and steered on land by hand peddling or a bar between the wheels that could be peddled direct shaft
     

    Attached Files:

  3. skaraborgcraft
    Joined: Dec 2020
    Posts: 346
    Likes: 112, Points: 43
    Location: sweden

    skaraborgcraft Senior Member

    Start off with a better and tried concept. Your bins have no real stabilty and will happily float on whatever side its rolled onto, by weight ,wind or wave action.

    I believe the plans for "Gorfnik" are online.

    [​IMG]
     
    Silvertooth likes this.
  4. Silvertooth
    Joined: Nov 2016
    Posts: 113
    Likes: 3, Points: 18, Legacy Rep: 10
    Location: Uk

    Silvertooth Senior Member

    Yes it’s a little gorfnik I’m aiming for. It will only be used on canals and it will mainly be on the road
     
  5. Silvertooth
    Joined: Nov 2016
    Posts: 113
    Likes: 3, Points: 18, Legacy Rep: 10
    Location: Uk

    Silvertooth Senior Member

    The peddle system is the hard part. It will be a paddle boat in the water with fins on the wheels and something like this for a mechanism. It has to be removed when in sleep mode
     

    Attached Files:

  6. seasquirt
    Joined: Dec 2015
    Posts: 114
    Likes: 53, Points: 28, Legacy Rep: 10
    Location: South Australia

    seasquirt Senior Member

    Think of running a chain drive down one side, with some gears, because road torque needs will differ to water splashing needs. You may need an outrigger to lessen chances of capsize. I'm all for experimentation, but I really hope you can swim. Have you slept in a wheelie bin on dry land ? It couldn't be any better floating and bobbing in water I'm sure. Good luck, and sweet dreams.
     
  7. Silvertooth
    Joined: Nov 2016
    Posts: 113
    Likes: 3, Points: 18, Legacy Rep: 10
    Location: Uk

    Silvertooth Senior Member

    The amphibian aspect is just for crossing rivers or small waterways ect

    I will have an electric wheel on the back so no need for gears

    keeping it simple

    there is a fine line between ridiculous and genius

    this is ridiculously simple
     
  8. skaraborgcraft
    Joined: Dec 2020
    Posts: 346
    Likes: 112, Points: 43
    Location: sweden

    skaraborgcraft Senior Member

    Bringing a sling tent is a lot simpler than having a removable drive system. Im assuming you have not slept in a confined space made of non permeable plastic, you will find yourself waking up with a wet sleeping bag.
     
    Silvertooth likes this.
  9. Robert Biegler
    Joined: Jun 2017
    Posts: 159
    Likes: 79, Points: 38
    Location: Trondheim

    Robert Biegler Senior Member

    Then I think an amphibious trailer towed behind any bike that you can get into the trailer would be a better solution. Propel the trailer across those short stretches of water with a double paddle or a sculling oar. What you are considering at the moment seriously compromises riding on land for the sake of occasionally propelling the vehicle over short stretches of water with a pedal drive. A trailer allows you to have a fully functional bike when you are not planning to cross water. And the trailer would only need to be a box long enough to carry you and the bike (so maybe a bit over 2 metres), wide enough to be stable (90 cm should do), and deep enough not to get swamped in whatever waves you can expect. 25 - 30 cm should do. Put a tent over it. If you choose 26" or even 29" wheels, you can mount them so that the axles are still above the water when the trailer floats.

    If you are willing to inflate some floats, the trailer box itself doesn't need to float:


    Alternatively, get some wheels with stub axles and pop them into the side of Gorfnik above, the way Matt Layden pops wheels into the side of Elusion when he wants to portage. The drawback is that then it becomes even more difficult to design an overrun brake, which you might want, given the weight you may carry.

    Having brakes on all your wheels is the best argument for an amphibious trike. I suggest something resembling this, only designed for paddling or sculling, not an outboard or a pedal drive: Amphibious Camper-Trike https://betriton.com/


    Also, I would prefer a front end more like the Varibike trike:


    In summary, for the occasional water crossing, I don't think it is worth compromising the primary use as you state it, riding on land. A pedal drive is not worth the bother, unless you like the challenge of designing a pedal drive that is useful on both land and water. And then a recumbent trike is likely to be the best configuration. But no matter whether you go for a tadpole trike (two wheels in front) or a delta trike (two wheel in the rear), the drive will be where you want to sleep, and building it so that it is removable will probably create worse trade-offs than raising your sleeping platform above the drive. Also, there are very few rear wheel steering vehicles because it is difficult to make them behave when cornering at speed. The picture you showed is of a vehicle that, I think, is designed to turn wildly, not to be controlled safely. The problem is that the centre of gravity necessarily is behind the fixed front wheels, so as soon as you turn, centrifugal force tries to make you turn more. If there are ways to counter that, the people most likely to know are members of the IHPVA (International Human-Powered Vehicle Association) and automotive engineers with a passion for Dymaxion cars:
     
    Silvertooth likes this.
  10. kapnD
    Joined: Jan 2003
    Posts: 1,292
    Likes: 406, Points: 83, Legacy Rep: 40
    Location: hawaii, usa

    kapnD Senior Member

    It’s hard to justify a craft that will be highly inefficient in both water and road modes.
    Perhaps focusing on the road mode, and utilizing bridges that are commonly found on said roads will allow your design to develop successfully.
     
    clmanges and Silvertooth like this.
  11. comfisherman
    Joined: Apr 2009
    Posts: 604
    Likes: 309, Points: 63, Legacy Rep: 10
    Location: Alaska

    comfisherman Senior Member

    Packraft plus a tent might be better?
     
  12. Silvertooth
    Joined: Nov 2016
    Posts: 113
    Likes: 3, Points: 18, Legacy Rep: 10
    Location: Uk

    Silvertooth Senior Member

    Thanks for all replies

    lots of food for thought here.

    yes there is no ideal all round it’s all compromises

    my craft will be a transportable capsule hotel on wheels. It won’t be very fast on land and won’t be very good on water at all but it will be able to float and cross small bodies of water like streams ect
     

    Attached Files:

  13. Silvertooth
    Joined: Nov 2016
    Posts: 113
    Likes: 3, Points: 18, Legacy Rep: 10
    Location: Uk

    Silvertooth Senior Member

    I was thinking about an electric wheelbarrow wheel on the stern which would have simple cable steering from the cab.

    Apparently they are waterproof and very hard wearing, of course very slow it would only be for moving the pod short distances.

    it could provide a little forward thrust and steering in the water but again only very slow and would also paddle like a canoe. But as soon as the water is shallow enough the other side and it grips the land you could drive up out of the water
     

    Attached Files:

  14. seasquirt
    Joined: Dec 2015
    Posts: 114
    Likes: 53, Points: 28, Legacy Rep: 10
    Location: South Australia

    seasquirt Senior Member

    Adding agricultural machinery and batteries will make it sink. Keep it simple. An Idea I had was to carry a canvas tarp, some cordage, and some strut like material like pool noodles, bamboo, fibreglass dome tent struts etc. and pad the bike where needed, then use it as a floor frame for a coracle, tying the tarp underneath it and across the top, sitting on the bike, and trying to make way with a paddle. The army can float a land rover or jeep this way. I got as far as making a canvas coracle which worked, but was too much trouble, and thick canvas is quite heavy, thin canvas tears, and light synthetics don't last.
    Or, how about an electric bike with big knobbly tyres, that goes fast enough to skim across the river without sinking, then go back to 'legal' speeds on land. Motorbikes can do it.
     

  15. Silvertooth
    Joined: Nov 2016
    Posts: 113
    Likes: 3, Points: 18, Legacy Rep: 10
    Location: Uk

    Silvertooth Senior Member

    Well my original idea was just an electric bicycle wheel on the stern but apparently the wheelbarrow wheel is much more hard wearing and waterproof
     
Loading...
Similar Threads
  1. mitchgrunes
    Replies:
    6
    Views:
    1,917
  2. dustman
    Replies:
    4
    Views:
    1,257
  3. Vineet
    Replies:
    12
    Views:
    1,552
  4. DogCavalry
    Replies:
    74
    Views:
    5,928
  5. Serge VadVad
    Replies:
    9
    Views:
    3,125
  6. schuh
    Replies:
    6
    Views:
    1,826
  7. aymanisamana
    Replies:
    30
    Views:
    4,994
  8. mustafaumu sarac
    Replies:
    51
    Views:
    8,032
  9. JohnMarc
    Replies:
    2
    Views:
    1,463
  10. IronClad
    Replies:
    24
    Views:
    6,055
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.