Forgot password

Bertrand Fercot's Masts

<< First  < Prev   1   2   Next >  Last >> 
  • 20 Mar 2012 21:28
    Quote
    Reply # 864388 on 864361
    Anonymous member
    Bertrand Fercot wrote: I sent a new article to describe the building of the masts of my previous cata Tiki30 built with a quicker method, and I hope to have not made too many language mistakes.

    Bertrand
    I've put Bertrand's article onto the Technical articles page. It's well worth reading.
    David.
  • 20 Mar 2012 20:56
    Quote
    Reply # 864374 on 856150
    Anonymous member
    But concerning a grinder, is it a tool to cut the sheets of metal?
    That's correct Bertrand, cutting and grinding. You can get cutters for them for carving wood, though I wouldn't use it for scarfing.:)
  • 20 Mar 2012 20:47
    Quote
    Reply # 864361 on 863441
    Anonymous member
    Annie Hill wrote:
    Gary Pick wrote:
    On page 3, it's a router you are using, not a grinder.
    Cheers, Gary
    Blame me, I did the proof-reading and missed picking up that one. 

    Annie, thank you, you have well corrected my article for the Newsletter in changing grinder by router. It's only on the page 3 of my original article that the word grinder is written.
    Happily a picture is better than 1000 words and is the best international language.
    I sent a new article to describe the building of the masts of my previous cata Tiki30 built with a quicker method, and I hope to have not made too many language mistakes.

    But concerning a grinder, is it a tool to cut the sheets of metal?

    Bertrand
  • 20 Mar 2012 19:47
    Quote
    Reply # 864306 on 856150
    Anonymous member
    Hash-harsh, I was going to delete the comment this morning but as you have commented Brian I'll leave it.:)
  • 20 Mar 2012 14:30
    Quote
    Reply # 863993 on 856150
    Deleted user
    Too much 'hash' could (I guess) make for slow boat-building, Gary :-)
    Brian
    Last modified: 20 Mar 2012 14:31 | Deleted user
  • 20 Mar 2012 10:36
    Quote
    Reply # 863889 on 863441
    Anonymous member
    Annie Hill wrote:
    Gary Pick wrote:
    On page 3, it's a router you are using, not a grinder.
    Cheers, Gary
    Blame me, I did the proof-reading and missed picking up that one. 

    Well I was going to say, 50 lashes with a wet fish but figured that might be a bit hash. So I suggest we put it down to a little game brains play. It's called insert random word here.:)
  • 19 Mar 2012 22:55
    Quote
    Reply # 863441 on 862856
    Anonymous member
    Gary Pick wrote:
    On page 3, it's a router you are using, not a grinder.
    Cheers, Gary
    Blame me, I did the proof-reading and missed picking up that one. 
    Last modified: 19 Mar 2012 22:55 | Anonymous member
  • 19 Mar 2012 12:00
    Quote
    Reply # 862856 on 856150
    Anonymous member
    Hi Bertrand, just read your masting building article and the technique you used is very impressive, not to mention the size of them. Makes my 9 metre mast seem quite puny.
    On page 3, it's a router you are using, not a grinder.
    Cheers, Gary
  • 18 Mar 2012 22:50
    Quote
    Reply # 862424 on 856150
    Anonymous member
    Mark

    Sorry, but my building is delayed on a so long time than I loosed e-mails and papers.

    In 2005 Hawkmarine made to me a proposition for an aluminium mast of 16m with a diameter of 170mm at the deck for a price of around 4000£ each one if I well remember but I don't remember their weight. As the price was too heavy for me I decided to build wood masts myself.

    The Tiki46 on the plans is a shooner rig with 2 mast of 12m and 20cm of diameter. I don't know the weight of each mast, but to compare the rigs, its necessary to know the weight of all the heavy reinforcements to hold the masts and all the shrouds, roller, etc. plus the weight of a fifth beam joining the 2 hulls in the center I don't build.....
    So I don't think than the the 2 x 275kg with their deck and keel reinforcement of my masts are heavier than the complete Wharram rig. At the oposite of the Wharram rig my masts are conic so the center of gravity is lower.

    Sure if I've followed my Swing wing rig plan which indicates 270mm of diameter at the deck the mast weight will be down at 200kg each one. But due to the bad experience on board the same type of catamaran Tiki46 "Apatiki" Junk rigged with undersized aluminium masts provoking permanent bendings I decided to increase the diameter of the masts at deck at 300mm with a full  section fron the bottom until 50cm above the deck and decreasing to get 50mm of wall at 1.7m above the deck until the top.
    The cost of my masts with wood, epoxy, glass cloth and paint is about 1500Euros for the two.
    Now we have to wait the first sailing tries after her launch  next May in different conditions of wind and sea to know more about my rig and if my own choices were good......

    Bertrand

    Sorry, I dodn't know what has been happened but previousely without to have clicked on 'Post", my non-finished reply was sent!!!
  • 13 Mar 2012 02:22
    Quote
    Reply # 856781 on 856150
    Anonymous member
    Mark,
    I think you're referring to Bertrand Fercot's pair of masts, for his Tiki. Yes, they were more complex than a straight-through construction would have been, but for good reasons:
    • To try the fit in the boat, without actually stepping the whole mast.
    • To avoid having to make a bend in the staves at deck level, in very thick timber.
    • To avoid having to glue up the whole length of a 16m mast in one session.
    All sound reasons, I think.
<< First  < Prev   1   2   Next >  Last >> 
       " ...there is nothing - absolutely nothing - half so much worth doing as simply messing about in junk-rigged boats" 
                                                               - the Chinese Water Rat

                                                              Site contents © the Junk Rig Association and/or individual authors

Powered by Wild Apricot Membership Software