simple amas for canoe-tri

Discussion in 'Multihulls' started by Owly, Jan 4, 2019.

  1. Aaron_de
    Joined: Jun 2016
    Posts: 13
    Likes: 1, Points: 3, Legacy Rep: 10
    Location: Avoca Beach, Australia

    Aaron_de Junior Member

    You should definitely check out Gary's book and blog. I built my Wa'apa from his plans which include a really simple ama. I built my amas from 3mm plywood, they are 15cm x 15cm x 4.2m and have 95kg of buoyancy each.

    Here's the boat in some of my YouTube videos...
    First sail with a new Lugsail -
    Boat walkaround with commentary -
    Rigging setup -
     
  2. Owly
    Joined: Oct 2016
    Posts: 98
    Likes: 5, Points: 8, Legacy Rep: 10
    Location: Montana USA

    Owly Junior Member

    I like the simplicity of those amas........There is not a lot of reason to make them fancy. I have a tendency to over complicate things.

    Thanks for the suggestion.................. H.W.
     
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  3. Owly
    Joined: Oct 2016
    Posts: 98
    Likes: 5, Points: 8, Legacy Rep: 10
    Location: Montana USA

    Owly Junior Member

    Time, a budget crunch, and other priorities put this project off...... I never got around to building the amas, but had lots of fun building models of them.... I still have two models based on some of the suggestions here sitting on display on my desk...... dreams are free, and models cheap. There always seems to be something more important, and the shop needs to be available for something else...... this week a trailer that needs an axle replaced, next week pulling the transmission out of my '05 F 150 and tearing it down for an overhaul, and currently it's sitting at about 0 F outside air temp....... a lovely calm sunny day though
    2 weeks ago I stumbled upon the "remains" of a Hobie 14........ no mast or sail for $100.......... Two amas for a fraction of what I could build one for, not to mention two excellent rudders and all the hardware........ I'm not pleased with the weight though. It was over 1K miles from home, but not far from where I happened to be going anywhere, and allowed me to route through an area I'd wanted to pass through for years.
    I'm not left with any real excuse for not moving forward now...... even the cross beams for the tramps can be cut in half and used. There is hardly a single component that is not worth what I paid for the whole boat....... The kick up rudders are excellent and well designed, and the entire linkage and tiller handle are there. I'd intended to use a single rudder though, and see little reason to use both of them other than the fact that they are a complete system needing only a longer connecting rod.
    I'm seriously considering the idea of using one rudder on the transom of the canoe, and the other as a leeboard on one side of the canoe hull, perhaps even making it "tuneable" a few degrees each way. It would kick up under one side deck. They are nice foil shaped rudders.

    H.W.
     
  4. thepelell
    Joined: Oct 2019
    Posts: 3
    Likes: 3, Points: 3
    Location: italy

    thepelell New Member

    Your idea is basically what I did a couple of months ago to create an outrigged canoe for double paddling on my local lake ( a 3km diameter almost circular lake). My main hull is made out of 4mm okoume , but for the amas I used 4mm poplar that is the only locally available plywood. Total length of each ama is 2m, width at deck is 25cm if I remember correctly. I made them short because I didn't want them to interfere with my paddling. I think you cannot get simpler than this as a construction method. Here are some pics..
    IMG_3679.JPG IMG_3680.JPG IMG_3683.JPG IMG_3687.JPG IMG_3710.JPG
     

    Attached Files:

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  5. Owly
    Joined: Oct 2016
    Posts: 98
    Likes: 5, Points: 8, Legacy Rep: 10
    Location: Montana USA

    Owly Junior Member


    Beautiful job on the amas........... Sorry about the delayed response. There is a considerable difference in mission between your project and mine. Mine is intended for sailing and camping out aboard. I want considerably more displacement in the amas, as the boat will have side decks which will be sleeping / camping / seating decks. Each deck will be somewhere in the 6.5' range......... not set in stone yet, and 24-30" width. A boom tent will make this into a serviceable wall tent allowing you to sit on the side decks, or lay on them. The decks will overlap the original gunnels, reducing interior hull space.... which will no longer be used for much other than flotation and a place to put your feet. the actual distance between the inner edges of the decks will be only around 18" as I currently am envisioning it. and will largely be a footwell. The decks will be well aft, with a spray shield at the forward beam... probably fabric, and one or more grooves in the side decks to act as gutters draining to an outboard gutter on each side with an aft scupper...and needless to say inboard depending on heel angle. I'm planning at this point to make the side decks from blue XPS foam with a layer of epoxy glass top and bottom. They will be glued to the inner beams that cross the boat..... probably just routed common lumber, and to light weight longitudinal member, and tabbed into the sides of the canoe hull. The 6.5' longitudinal distance calls for some stiffening longitudinal members. The inner edge extending into the canoe hull may be thickened downward to add this stiffness, by simply laminating foam on and glassing it.
    The project is gradually taking shape in my mind if nowhere else ;-)

    H.W.
     
  6. thepelell
    Joined: Oct 2019
    Posts: 3
    Likes: 3, Points: 3
    Location: italy

    thepelell New Member

    yes I get your idea.. it's actually how I would build my next tri if I had the funds and workshop place.. maybe next year.
     
  7. Owly
    Joined: Oct 2016
    Posts: 98
    Likes: 5, Points: 8, Legacy Rep: 10
    Location: Montana USA

    Owly Junior Member

    The basic concept is somewhat like Richard Woods Strike 15......... very loosely needless to say............. here are some photos of that boat: Small Trimarans.

    H.W.
     

  8. BlueBell
    Joined: May 2017
    Posts: 788
    Likes: 84, Points: 28
    Location: Victoria BC Canada

    BlueBell Ahhhhh...

    Owly,

    Just make your amas longer.
    Taller, wider if need be but the approach and concept are what is of value in thepelell's post.
    Light construction, well made.
    Simple.
    Lather as much reinforcing fiber as you see fit and go sailing.
     
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