Masts for a large rig

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  • 07 Jan 2012 16:01
    Reply # 789375 on 789024
    Bertrand Fercot wrote:...
    And sorry if my English is not always very good...

    Bertrand

    So very few Americans speak any other language at all.  I admire people who have the courage to participate in a forum in a language other than their native tongue.  Apologies not required.

    Jeff
  • 07 Jan 2012 00:56
    Reply # 789073 on 595819
    Here's a direct link to the article, which is well worth reading if you are building wooden masts:
  • 06 Jan 2012 22:59
    Reply # 789024 on 595819
    All my Best Wishes for this new year 2012.

    In the beginning of last November it was urgent to finish to paint the two masts I made, because the temperature and humidity begun to become too bad.

    I have resumed in a PDF article with pictures how I have proceeded. It's possible to have a look  at it on this site in the section "Document & Drawing" in the technical articles submitted by members.
    And sorry if my English is not always very good.

    Now I have to build the wishbones to complete the rig.

    Bertrand
  • 23 Aug 2011 22:28
    Reply # 683188 on 682866
    Hi Bertrand,
    Very pleased to hear you are nearing the end of your project. I too am getting near the end after 9 long years. Malliemac came out of the shed last Saturday and now sits in the sunshine. Hope to launch later this year. I will post an article on the builders forum when I get a minute and put some photos in the photo gallery.

    Cheers, Peter
     Hi Peter
    Happy to know you too are at the end of your building.
    I hope so to launch her before the end of this year and before to sail away I'll have to sail to the isle of Wight where the designer of my hybrid propulsion system is working to make adjustments and tests. After if the weather is OK we'll sail to the Caribbean.....
    Hoping to meet you again somewhere on the sea.
    Cheers, Bertrand
  • 23 Aug 2011 22:15
    Reply # 683186 on 682430
    David Tyler wrote:Salut Bertrand,
    As far as I can see in the photos, you are making a scarph above deck level which will be joined later, when it is time to step the masts. Is the scarph going to be a permanent, glued join, or can you take the top parts of the masts off by separating this join?
    I am glad to hear that you are near the end of the long, long, boatbuilding road. You will soon be breathing sea air, not dust!
    Amities, David.

    Salut David

    The upper part of the masts will be glued on the bottom parts when I'll have finished to reinforce this bottom parts with glass+epoxy and to have glued thick round parts (to bolt the masts) at the deck level and on the foot as I made in Martinique for my Tiki30. To adjust exactly this round parts to the mast it is necessary at first to bolt them on the hull and after to put the bottom part in the hulls to glue  them  at the god angle and good position.
    After I'll put the bottom parts on the ground between the 2 hulls to glue 8 conical timbers to get a complete mast.
    When I'll have finished I'll made a little text wit pictures to explain.
    As Marie-Helene take pictures each days, you can follow the progress on her website :
    http://maheyo.free.fr/spip.php?article45

    After I'll have to build the double wishbones.......
    Amitiés, Bertrand
    /LinkTracker.ashx?selId=2oloevHYxJhH%2fxo2jMF4eS%2f6YOqQhiSTeIDCU9azPsbH3Jzvs7tdUkE3piL575OQ
  • 23 Aug 2011 12:40
    Reply # 682866 on 682322
    Deleted user
    Bertrand Fercot wrote:I begin to see the end of the  building of my Wharram cat 46 which will be riged with 2 Swing Wing rigs of 55m² each. On a catamaran  the unstayed masts have to be over sized as the heeling is very weak. Our friends with their  Tiki46 rigged with twin more classical junk rigs have problems with there aluminium masts and battens with permanent bending of the top of the mast and main battens (although the rig has been designed and made by  professionals) . 
     Since the beginning of this month, I build the wooden masts. After a lot of searches and drawings I decided to build the masts in 2 parts: the first one from the keel until 1.7m above the hull is solid until 50cm above the deck. This part will be adjust in order to be bolted on the deck and on the keel ; after the top of the mast from 30cm at deck to 10cm at top will be added to the first part. So after the launching, the masts will be ready to be bolted.

    The total length is 16m, with 2m in the hulls and 14m above the deck.

    You can have a look at the first steps of this building :
    http://maheyo.free.fr/spip.php?article45

    Bertrand
    Hi Bertrand,
    Very pleased to hear you are nearing the end of your project. I too am getting near the end after 9 long years. Malliemac came out of the shed last Saturday and now sits in the sunshine. Hope to launch later this year. I will post an article on the builders forum when I get a minute and put some photos in the photo gallery.

    Cheers, Peter
    Last modified: 23 Aug 2011 12:40 | Deleted user
  • 23 Aug 2011 01:04
    Reply # 682430 on 595819
    Salut Bertrand,
    As far as I can see in the photos, you are making a scarph above deck level which will be joined later, when it is time to step the masts. Is the scarph going to be a permanent, glued join, or can you take the top parts of the masts off by separating this join?
    I am glad to hear that you are near the end of the long, long, boatbuilding road. You will soon be breathing sea air, not dust!
    Amities, David.
  • 22 Aug 2011 22:13
    Reply # 682322 on 595819
    I begin to see the end of the  building of my Wharram cat 46 which will be riged with 2 Swing Wing rigs of 55m² each. On a catamaran  the unstayed masts have to be over sized as the heeling is very weak. Our friends with their  Tiki46 rigged with twin more classical junk rigs have problems with there aluminium masts and battens with permanent bending of the top of the mast and main battens (although the rig has been designed and made by  professionals) . 
     Since the beginning of this month, I build the wooden masts. After a lot of searches and drawings I decided to build the masts in 2 parts: the first one from the keel until 1.7m above the hull is solid until 50cm above the deck. This part will be adjust in order to be bolted on the deck and on the keel ; after the top of the mast from 30cm at deck to 10cm at top will be added to the first part. So after the launching, the masts will be ready to be bolted.

    The total length is 16m, with 2m in the hulls and 14m above the deck.

    You can have a look at the first steps of this building :
    http://maheyo.free.fr/spip.php?article45

    Bertrand
  • 28 Jul 2011 10:42
    Reply # 664893 on 595819
                  Theres a big concrete junk riged schooner called Tao on the hard near me ,the masts are about  10 inches ,look alloy and if you could find out who owns it ,they might give some imfo .
  • 16 Jun 2011 20:32
    Reply # 623180 on 595819
    Peter and Cathy,

    When you joined us for that day-sail long ago in Minerva Reef, I don't know what your total impressions were. I do remember it was fun!

    So that you might relate mehitabel's rig to your design for Leto, though, here's a little information: 
    - our SA:D ratio is not quite 16:1;
    - the foremast is almost as long as the boat; (was 9' longer)
    - the mainmast is about 1.2m longer than the boat; (was 11' longer)
    - sail area is something like 15% greater than the original bermudan; 
    - aspect ratio of the sails is around 2.2.

    And one obvious fact: a little shorter is much stronger, all else being equal.

    Cheers,
    Kurt
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