building new amas/floats from recycled beachcat hulls

Discussion in 'Multihulls' started by trip the light fandango, Apr 23, 2019.

  1. Corley
    Joined: Oct 2009
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    Location: Melbourne, Australia

    Corley epoxy coated

    It's not very inspiring weather at the moment. Looked at the Aldi batteries myself thinking of doing that or having a Lithium battery I carry out in the dink. Not really sure on that yet, guess I need to get my boat back on the water first :)
     
  2. trip the light fandango
    Joined: Apr 2018
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    Location: Rhyll Phillip Island Victoria Australia

    trip the light fandango Senior Member

    Well the glass set at possibly lower than 18 Celsius so the resin isn't too old, I taped some plastic bags over to keep the rain off. With the sun directly on the surface, temperatures probably get to setting pretty quickly. After reading Oldmulti's excellent articles pointing out the values of thin ply, stresses and loads, it is reassuring when building with recycled beachcat, cutting shapes from foam sandwich panels, and glassing them up to strengthen areas that are taking load, it is very similar to thin ply sort of. There is lots of similar detail except a need to build up right angles with Qcell/ microballoons to avoid hard to glass angles that make working out trapped air difficult where timber stringers would have been used for bulkheads and twist/ torsional resistance areas. Those posts of his are really informative; how successful tris have been made.

    One thing a fibreglass Tremolino has over all the other trimarans I've read about is the flange that goes right around the main hull. It makes the boat very dry. A largish cabin would be nice instead of the pair of coffins , but still you can't have everything. Yes green water can come up the forward deck and spill into the cockpit[exaggerated by the flanges] but it's rare and a nasty 5ft short steep chop you've plowed to do it, and it sheds immediately..
     
  3. trip the light fandango
    Joined: Apr 2018
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    Location: Rhyll Phillip Island Victoria Australia

    trip the light fandango Senior Member

    It's a good time of year to work on a boat Corley...feels early..,.. no perspiration drips..hardly any insects..the sanding warms you up... ha .. . cheers.
     
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  4. trip the light fandango
    Joined: Apr 2018
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    Location: Rhyll Phillip Island Victoria Australia

    trip the light fandango Senior Member

    I've cut out the shapes from left over maricat carcass for the dagger board case extensions and I can cut my baffle stations/semi bulkheads out from the leftover panels that are left while I'm waiting for good weather.
     
  5. trip the light fandango
    Joined: Apr 2018
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    Location: Rhyll Phillip Island Victoria Australia

    trip the light fandango Senior Member

    I'm thinking of using a wringer type of technique for when I join the donor hulls. to the original floats. Working the resin through and dropping excess into a largish tray to keep it cool, and keep the resin moving., and clamping the start of the matt to the bow as I work back, minimising heat build up. No issue with humidity at the moment but an over cast day ,low wind and just the right amount of catalyst will be crucial. Because I'll be laying up on a near vertical surface, wetted out but dryish/tacky will be important. When I've finished the sun can come out.. If I'm well organised ,don't allow anxiety to creep in,or freak out, and are prepared to strip off anything that cures before I'm ready I'll be right. Not quite enough catalyst and cool temperatures can work with polyester, easy and cheap to lay mixes over. But the 45 minute set on epoxy is beginning to sound safer. I'll keep practising with the laminating resin on the dagger board cases for now, I'll soon know whether my plan is feasible...
     
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  6. trip the light fandango
    Joined: Apr 2018
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    Location: Rhyll Phillip Island Victoria Australia

    trip the light fandango Senior Member

    I've got caught up with trying to build dagger board cases strong enough for partial foiling. I think a case[bottom 3rd] of 5 layers of various width of 400 gsm by 45 diagonal should hold as the donor hulls also intersect at the cases. That matt absorbs a lot of resin, a spring loaded adjustable [wing nuts]scraper on the inside edge of the resin tray will speed things up. I may never foil but it is a good place to have lots of strength, the cases themselves are getting closer. It's slow work, my wish list may be a little over developed ,..what happens when one reads forums,.. ha . Focusing on mini/micro cruisers [similar hull space ]brings it all back down to earth.
     
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  7. trip the light fandango
    Joined: Apr 2018
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    Location: Rhyll Phillip Island Victoria Australia

    trip the light fandango Senior Member

    I hadn't used this biaxial 45 400gsm x 150mm before, I'm beginning to think it's me [probably is] but it seems to require filling after each layer goes on. It's taking a while, I still have a big bag of micro balloons[Q cell] which is actually quite fun to sand, left over from the last time I worked on the Trem...reading the 6.5 performance/cruising trimarans and the Buccaneer 24 forums and Old multi's stuff is keeping me motivated in the meantime . I'm still pecking away.
     

  8. trip the light fandango
    Joined: Apr 2018
    Posts: 258
    Likes: 46, Points: 28
    Location: Rhyll Phillip Island Victoria Australia

    trip the light fandango Senior Member

    I was relieved when the dagger boards winkled out, getting close to glassing the 2 parts -hobie 16 and maricat which overlap on the new dagger board cases, maricat is the new stern. You can see the sanded line where the donor hulls will be glassed to. The new length is 21ft plus a bit, mainly coming from the maricat stern. the bows will be a modified form of H16.
    20190715_135913.jpg 20190715_135925.jpg 20190705_150938.jpg
     
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