18' Trimaran built for camping. Cutter rigged.

Discussion in 'Multihulls' started by markstrimaran, Feb 25, 2017.

  1. markstrimaran
    Joined: Dec 2014
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    Location: usa

    markstrimaran Senior Member

    Room for 4 adults.

    Beach able.

    8" draft with boards up.

    Trailerable.

    30 minutes to launch, in the dark. With minimal needed for assembly .

    Unsinkable, foam laminated cored hull.

    Completely dry cabin, waterproof in a rainstorm with
    36" of head room.

    Easy to sail, upwind ability.

    Dual purpose, amas, can be removed, and it becomes a 15" fast River boat.

    Built for less than $2000.00
    This was on here before. I can't post to my old link, so I started a new thread. The boat has 3 years on it, since I started. It has undergone a lot of tweaking. It still has a few things that could be improved upon.

    It needs primer ed areas to be painted, the dagger board/Lee board, setting a self tacking jib sail. The problem trailer fender that likes to vibrate loose.
     

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  2. markstrimaran
    Joined: Dec 2014
    Posts: 179
    Likes: 2, Points: 28, Legacy Rep: 28
    Location: usa

    markstrimaran Senior Member

    pre season check off

    Stepped the mast. Routed the halyards. Mounted the boom pivot. The spirit boom inserted in to bow.
    Trampoline bolt rope is pulling out of track.
    Still need a main sail cover that is trailerable.

    Years past I had an hour to set up at the ramp. This year I want to keep as much of it set up and trailerable.

    I need to get a self tacking lead sail arrangement. As any early season sailing is 20 to 30 knot gusts.
     
  3. markstrimaran
    Joined: Dec 2014
    Posts: 179
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    Location: usa

    markstrimaran Senior Member

    pre season check off

    Lawn sailing, repaired tramp pulling out of track.
    Built some cable bridles to quickly adapt between 150 geona, and the storm jib.

    I am going to try a swing keel mount on the steel ama cross arm.
     
  4. markstrimaran
    Joined: Dec 2014
    Posts: 179
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    Location: usa

    markstrimaran Senior Member

    swing keel dagger boards

    The sol cat ama, donor, has dagger board slots. The perfect spot to put a balanced keel, is 16" forward. The easiest place to put one is 30" forward, of the slot.
    If I used both the rear dagger board, and a too far forward swing keel/ modified Lee board. Would this combo balance out the CE.
    Or would the disturbed wake from the leading board, cause the following one problems.
    It's a slow boat, maybe 10 mph max .
     
  5. markstrimaran
    Joined: Dec 2014
    Posts: 179
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    Location: usa

    markstrimaran Senior Member

    swing keel dagger boards

    Some pictures
     

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  6. markstrimaran
    Joined: Dec 2014
    Posts: 179
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    Location: usa

    markstrimaran Senior Member

    The brown pipe was the pivot point for the keel. It used the cross tube bolt holes, easy to mount. In stronger winds Lee helm was problem. I am going to try one on the cross arm, if it will hold.
    Last resort will be fiberglass in a Lee board pivot point on the ama .
     
  7. markstrimaran
    Joined: Dec 2014
    Posts: 179
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    Location: usa

    markstrimaran Senior Member

    20 mph sails

    It's going to be a few weeks, of rain, and busy weekends, finished up the short list to be ready to sail.
     

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  8. markstrimaran
    Joined: Dec 2014
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    Location: usa

    markstrimaran Senior Member

    first sail

    The new keel balances the helm pretty good. Locked strait up and down, has slight weather helm. Pivoted back it start drifting to lee. The jib sail is pull all the way out, on the spirit boom.
     

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  9. markstrimaran
    Joined: Dec 2014
    Posts: 179
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    Location: usa

    markstrimaran Senior Member

    Had some nice winds for sailing. I had it going as fast as my 8 hp outboard will push it. With the sails. 5.5 knots. "Sail boat prop"
    I had it flying one ama, at about 4 knots. It feels steady enouph. I had concerns. That it might become squirrely.
    In light winds the 150% geona doubles the speed vs the 75% storm jib. With the inner stay sail. Remaining the same.

    The 150 geona will not pull out of weather helm if near the irons. I had to motor leeward
    Every time I tacked. I did not try and rake the keel, back as it was a little hectic.

    I normally use the 150. When the top wind gusts are 5mph, in late summer.
     

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  10. markstrimaran
    Joined: Dec 2014
    Posts: 179
    Likes: 2, Points: 28, Legacy Rep: 28
    Location: usa

    markstrimaran Senior Member



    This is from 2 years ago.
     
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