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Proposed Rig For Amber

  • 14 Mar 2016 15:46
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    Reply # 3879911 on 3877631
    Anonymous

    Thanks David.
  • 14 Mar 2016 06:24
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    Reply # 3879137 on 3877631
    Anonymous member

    I think 5in schedule 40 pipe (5.563in outside diameter x .258in) is too heavy, but 5in x 1/8in tube is too light, as you intend to carry quite a big sail. Of the stock sizes available in N America, I think I'd choose 5in x 1/4in tube.

    Yes, if the intersection of the vertical mast line and the yard is chosen as the point around which you rotate the mast, you'll be OK.
  • 13 Mar 2016 16:52
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    Reply # 3878211 on 3877631
    Anonymous

    Thank you David. I am planning to gusset the square tube at the base plate and use a double gasketed/bolted flange assembly bedded in compound at the cabin penetration.I also believe the tripod struts are necessary. Previously you mentioned 5" diameter for the aluminum mast. I was thinking sch. 40 but it has been suggested to me 1/8" wall may suffice? I will be using wood for yard, battens,and boom. The next step for me is to layout the rigging. PJR was not clear as to where the raked mast line should cross the plumb line. The intersection of the vertical  mast line and the yard are  standard for the base point? 

    Last modified: 13 Mar 2016 16:53 | Anonymous
  • 13 Mar 2016 08:46
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    Reply # 3877826 on 3877631
    Anonymous member

    I think the yard and head of the sail will lie naturally a little closer to the mast than you've drawn them, but if the calculated lead is really 6%, as marked on the drawing, then that is probably to the good. Otherwise, the positioning of the rig looks OK to me. However, I'm not at all sure how to achieve a sound structural design for the tabernacle as you've drawn it. I've seen a catamaran with a kind of tripod tabernacle, and this might be feasible for Amber, with the main part of the tabernacle deck-mounted, a straight strut down to link up with the keel bolts (to take tension and compression), and two strong struts out to the edge of the deck, forward of the foot of the mast.
  • 13 Mar 2016 03:00
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    Message # 3877631
    Anonymous

    After spending some time familiarizing myself with drawing a new rig for my boat, I think I have one I like. I settled on a 24 meter rig I think will suit my needs. I raked the mast forward 5 degrees and would like some input as to whether it is done correctly (and advisable) for my boat as it ties in with my proposed "dogleg" tabernacle. The tabernacle will be constructed of 5" HSS and the dotted line leading down to the fore deck denotes triangulated struts if deemed necessary. The base plate fastens to the (3) existing keel studs. I did this in attempt to maintain the vee berth and with the understanding of the raked mast's accidental gybe inhibiting qualities. I think this can benefit a novice such as myself. These sketches can be seen in my member photo album. Any advice is greatly appreciated. Thanks.

    Last modified: 13 Mar 2016 03:11 | Anonymous
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