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Advice for rigging a 15' Catamaran

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  • Advice for rigging a 15' Catamaran

    Now I know how "Skipper" felt on "Gilligan's Island."I was given a 1978 MacGregor/Venture 15' Catamaran. This Cat has not been in the water for 15 years. The hull and mast are in perfect shape. I have most of the hardware. Also the sails are new but what is missing is the shrouds and lines. I need a picture or some 'how-to' rigging advice. Ed CanonPS-Has anyone seen "Maryanne" around?


  • #2
    Re: Advice for rigging a 15' Catamaran

    Ed - did you get my reply on the other forum?

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    • #3
      Re: Advice for rigging a 15' Catamaran

      Ed, there is no set formula for rigging a sail boat. step the mast with temp line and center it, then measure your shroud length allowing for turnbuckles, straps, etc. Mcgreoror may even have specs on the boat..
      The Devil to pay, and no pitch hot!

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      • #4
        Re: Advice for rigging a 15' Catamaran

        KNOXES-I'm new to this forum.Thanks for the advice (ask sailing questions in the sailing forum ).Duhh **

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        • #5
          Re: Advice for rigging a 15' Catamaran

          FLASHBACK,thanks for the rigging info.I called Macgregor in Calif.,but was told much of there info for the late '70's cat is not available anymore.Can you recomend a book that deals with small catamarans.

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          • #6
            Re: Advice for rigging a 15' Catamaran

            EdI'm not familiar with your boat, but I've spent a bunch of time on cats. Do you have any pictures of your mast and hull and hardware? Do you have the original lines and shrouds or justthe hardware?Does your boat have a jib or just a main sail?

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            • #7
              Re: Advice for rigging a 15' Catamaran

              Well I hope the other info I gave was helpful (not just to post in the proper forum ). I think we need some additional info here and we can get you going in the right direction. I can't recall any books about cats in particular - but I/we could surely refer some if we knew what you were looking for... what parts do you have? what specific problem are you trying to fix? Are you having problems stepping the mast? raising sail(s)? tackle, blocks?

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              • #8
                Re: Advice for rigging a 15' Catamaran

                STRINGBOX About that cat.I've obtained a copy of the brochure from www.Macgregor-**********. My problem is that I need more details. All the lines are gone ,but the mainsheet pulley is fine.The shrouds and jib stay are not original (1/8" stainless steel). My questions are at what angle is best for the mast (fore & aft). How far aft should the shrouds lead from the mast and how tight. ------------------------------------------- Project boats are fun

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                • #9
                  Re: Advice for rigging a 15' Catamaran

                  Knoxes You guys may have opened a pandora's boat... I mean box. Jib,mainsail,blocks,stoppers and all hardware ,except lines and shrouds, are accounted for. The info I need is simple (*sure*).What is the best mast angle and shroud lead? Do you think my jigsaw puzzle will be just trial and error.

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                  • #10
                    Re: Advice for rigging a 15' Catamaran

                    Angle is a relative thing. In lighter winds, you will want the mast straighter than you will in heavier winds. Raking the mast back should depower the boat a bit, and allow the bow to ride higher to avoid pitch-poles in big seas. You should have an adjustable chain plate on the hulls so that you canadjust the angle. You should be able to find a chainplate that would work at Boaters World or a You should also have a chain plate on the bridle at the bow. It is important to have the rig fairly tight once the mast is steped. You will always have some play on the leeward shroud with the boat under sail. To much play, and your mast can come out of the foot. This is not a good thing when you are flipped over and 5 miles out to sea. I'll see if I can't draw you up something tonight so that you will have a better idea. I coule use a picture of your boat hulls.

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                    • #11
                      Re: Advice for rigging a 15' Catamaran

                      I Checked your link, could not see the rigging in the picture well enough to tell much. The following diagram is very basic. It allows you to adjust the rake of the mast forward or aft by moving the pins in the chain plates up and down. I need to know how your jib is attached to the fore stay. If you can, send me some pics or post them.You can email them to me direct so there is not a bunch of slow loading pictures in this post.Hope this helps

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                      • #12
                        Re: Advice for rigging a 15' Catamaran

                        GREAT DIAGRAM !! You should be re-creating manuals of sailboats that aren't availible anymore!! I'd buy one. I don't have any pictures other than the brochure you've seen. The jib slides over a tube that slides over the forestay.The forestay mounts to the center of a crossmember .This crossmember is mounted bow to bow.The shrouds do have chain blocks,but I have 4 different locations ( fore and aft**to mount them to.Any suggestions on an angle the shrouds should be. ----------------------------- It's getting easier

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                        • #13
                          Re: Advice for rigging a 15' Catamaran

                          The angle is going to depend on the wind, the type of water you are sailing in, and how much weight is onboard. You may have other spots for mounting trap wires.Generally, the closer the mast angle is to 90 degrees the more power you will have from the sails, but the lower the bow will ride in the water. Kind of like tilt/trim on an outboard. However, you can end up driving the boat into the back of a wave and playing submarine. This is called a pitch pole and it feels kind of like you hit the end of a leash tied to a telephone pole. You stop abruptly and the boat can flip end over end throwing you and everything on the boat forward. In light winds you will want the mast almost straight up, in heavier winds you will want to tilt the mast backward to depower the boat and make the bow ride higher in the water.After you get used to your boat, you will have a very good idea what kind of angle you want on the mast for given conditions. Does your jib line have a pully somewhere along the line and does it have a wire inside the sail itself? On a hobie 16, the jib has a wire inside the sail that becomes the main stay once the sail is up. This allows you to hoist the jib sail tight and take up the slack in the shrouds at the same time.Do you have trap lines that you will also be mounting? If you don't, you should, flying a hullwhile hanging out on the trap is a blast!You will also need a good righting line installed on the boat before you even think about putting it in the water! Do not skimp on the righting line. You can easily make one from parts at the hardware store. I used to make my own and had it set to be adjustable. It also served as a "sissy" line for the crew to hang on to while out on the trap. Usually only takes a good rope, some heavy bungie cord and a couple of clips and some small rollers if you want to get real fancy. It is also a good tow rope should you need one, and if you sail enough, your probably will eventually.Heres a pic a friend sent me, might inspire you to get that boat in the water this weekend

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                          • #14
                            Re: Advice for rigging a 15' Catamaran

                            STRINGBOX, Now thats the info I've been searching for. The jib has the head,tack and clew cringles.The forestay runs through the jib.A pulley at the masthead keeps the jib taut.You've read my mind about trap and righting lines.Thanks for the advice.By the way,the picture you sent made me reevaluate my priorities.

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                            • #15
                              Re: Advice for rigging a 15' Catamaran

                              EdI took my wife out sailing yesterday on my friends new cat. Her first time on a sail boat of any kind. It was a bit choppy and gusty, the wind was blowing dead straight in to the beach at about 20 knots from the North. Not the best day for a first timer, but we had a blast! Once we were flying a hull she could'nt get enough. Good luck with the boat, I'd love to see pictures when you get her to the water.

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