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Maxi 77 junk rig conversion

  • 17 Jan 2024 21:04
    Quote
    Reply # 13302386 on 13226713
    Anonymous member

    Hi István,

    nice project, thanks for sharing! The Maxi is a good playground, strong and sturdy hull.

    Yep, removing the glue is hell. I tried every solvent at hand, but I found it best to use a "foil eraser". It is basically a rotating eraser, operated with a screwdriver. It just wipes off the glue, without stinking and alike. Maybe you give it a try?

    As I don't like seacocks, the toilet was thrown out, the holes closed and laminated and a dry separating toilet installed. Works like charm!


    Good luck!

    Paul
  • 17 Jan 2024 19:02
    Quote
    Reply # 13302319 on 13226713
    Deleted user

    Hi Paul!

    It is a nice coincidence, I wouldn't dare to be a pioneer with my Maxi :)

    I bought the boat in October 2022, replaced some small parts, rebuilt the whole electrical system (it hasn't burnt down yet knock-knock), changed some lines; I tore the very old mainsail so had to order a new in the autumn. My rollerfurler genoa is in pretty bad shape too, it should be replaced too, but I wait and see, even if I can't convert the boat this winter, it should last one last season and I convert the boat after season.

    This winter I gutted out the whole cabin just like you, I haven't removed the toilet yet, but I plan to anyway with or without conversion. I scraped off the white-grey linig, it was covered with mold in all the hidden inner curves where it didn't stick to the GRP. Best way I found to remove the lining was a putty knife with it's corners slightly rounded so it didn't tear that badly the lining.

    Removing the glue is easiest (for me) with isopropyl-alcohol brushed over a small area (like two palms) then wire brushing with an accu drill with an ca. 25 mm diameter brush. Larger diameter brushes bit into the GRP, the small one doesn't. I shouldn's say, but wear a proper mask.

    Scraping the lining took maybe 3-4 days, cleaning the glue is taking even more, it's not yet finished. It got cold here too, maybe I ice the project until March.

    I'm rebuilding the two closets too, in an open interior style, up to the inner shell only. Probably I spare the kitchen, it's in better shape, I only change some doors probably.

    7 files
    Last modified: 17 Jan 2024 19:05 | Deleted user
  • 17 Jan 2024 18:07
    Quote
    Reply # 13302297 on 13226713
    Anonymous member

    Quick update on my Maxi 77 conversion:

    mast already delivered. Battens delivered and fitted with bolts and chain. Sail color finally determined. Sail cloth ordered, delivery probably friday. Paper templates already cut out (barrel type camber, direct copy of Ketil's Kelt 8.50). Office stapler ordered. Hull prepared for mast step installation: parts of inner grp shell removed, prepared for Arne-type plywood maststep. Pending workshop offers for partner and masthead.

    It is too cold right now in norther Germany for propper work aboard. Next steps will be chopping off the mast to its designed length (triple-checked the figures...) and sewing the sail. Much welcomed indoor jobs these days.


    Attached are some progress fotos.


    Some hard facts for comparison:

    Mast: Nedal 12m, 177/76x4mm, EN AW 6063/T6

    Battens: EN AW 6060, acc. to Arnes files: boom 50x1,5mm; lower battens: 35x2mm; upper two battens: 50x1,5mm; Yard: 60x5mm doubled up with 35x2mm.

    Sail cloth: Swela Outguard 393 (PES, 190g/mm², PA coated, both sides look the same); 50 mm PES webbing (5t spec); mast batten pockets: Serge Ferrari 705 Precontraint (670g/mm²)

    6 files
  • 17 Jan 2024 17:38
    Quote
    Reply # 13302279 on 13226713
    Anonymous member

    Hi István,

    welcome! What an nice coincidence that the two of us are tackling a Maxi 77 conversion just about the same time. Will be good for learning from comparison!

    My two cents about Nedal: When I contacted them and described my needs, they pointed their reseller in my homecountry directly to me, which I think is a very good service. Only, it took 3 weeks. Might be the same for your case, so keep your hopes high if you don't get an immediate response from them.

    What do mean by the glued inner liner? The white/grey linoleum on the walls? The inner grp shell of the hull? Of these two options, I'm afraid I already removed parts of both... ups.

    You mentioned your cabin refit. May I ask what you are changing? Probably we are in a pretty similar situation, as I also stripped out almost everything.


    Cheers,

    Paul
  • 17 Jan 2024 13:34
    Quote
    Reply # 13302111 on 13226713
    Deleted user

    Dear Jan! 

    Thank you very much for your help! I can't be that blind that I couldn't see the contacts, but here I am... :D Maybe I was tired when browsing.

    First I wait for the price offer for the Nedal pole, maybe I get lucky, and wait for my PJR book to be delivered. Also I'm in the very middle of a cabin refit, and it would be practical to finish it along with the conversion - I try to convince my wife that this is logical ;)

    Stay safe! 
  • 16 Jan 2024 22:29
    Quote
    Reply # 13301939 on 13226713
    Anonymous member

    Hello Istvan !

    Here are their (Rosa) addresses:

    https://rosa.pl/en/contact

    You must roll down, then press any "V" sign on the right side (drop-down list ) ;)

    take care ! Vigyázz magadra !

    Jan

    EDIT:

    My junk guru Kris Matuszewski used aluminum power poles bought somewhere in Poland. Kris should be arriving in Lanzarote soon, so if you would like to contact him, he may be available on Facebook for some time.

    Last modified: 17 Jan 2024 11:59 | Anonymous member
  • 16 Jan 2024 16:17
    Quote
    Reply # 13301703 on 13301177
    Deleted user
    Anonymous wrote:


    Hello István,

    welcome to the JRA!

    My advice is to contact Nedal. Just click on "Lighting columns" and select Hungary:

    https://www.nedal.com/contact/sales/

    Frank

    Dear Frank!

    I've contacted them for a price offer through an Austrian distributor, they seemed heplful, we'll see the price.

    Until that: what density and type sailcloth do you recommend? For now I'm leaning towards sewing a flat cut sail myself (I've sewn a few for my self built small boats). Maybe Paul mentioned that he had sailed with a junk rigged boat with a way too heavy sail and it had zero windward performance. What I liked working with and has a friendy price tag is a 380 g/m^2 polyesther cloth with PU coating on one side, I don1t know if it's appropriate for a sail like this.

    On the other hand we have predominantly light winds in the summer on Lake Balaton, Hungary, so I'm still browsing info about cambered sails, and if I can sew one myself, or I should contact the sailmaker I know.
  • 15 Jan 2024 15:21
    Quote
    Reply # 13301177 on 13301116
    Anonymous member
    Anonymous wrote:

    Hello everyone,

    Anyway, it's just all dreaming until I can find good mast material. I definetely want aluminium, what I probably can source in Hungary are made by Polish company, Rosa (rosa.pl), but I can't find their email adress. Maybe I could reach them via their Hungarian dealers, if it worth the hassle.


    Hello István,

    welcome to the JRA!

    My advice is to contact Nedal. Just click on "Lighting columns" and select Hungary:

    https://www.nedal.com/contact/sales/

    Frank
  • 15 Jan 2024 11:39
    Quote
    Reply # 13301116 on 13226713
    Deleted user

    Hello everyone, hello Paul!

    I'm new to the JRA, but after reading some of Roger Taylor's books, watching YT videos and reading the availabe material on this site, I got really interested in converting my boat, which is also Maxi 77, hull number 1619, into junk rig. I read this whole thread and found interesting information, I actually thought that installing a free standing mast requires more reinforcements.

    Anyway, it's just all dreaming until I can find good mast material. I definetely want aluminium, what I probably can source in Hungary are made by Polish company, Rosa (rosa.pl), but I can't find their email adress. Maybe I could reach them via their Hungarian dealers, if it worth the hassle.

    https://rosa.pl/produkt/sal-115m-p

    This is a two-part pole, ordering a raw upper part would only be 9888 mm according to their bluerint. IF they are willing to ship a raw upper part at all.

    https://rosa.pl/produkt/mal-12-5

    This one is a bit overkill according to the previous posts, but I don't mind extra safety, althought moving it on the ground would be a real challenge for two people.

    What do you suggest? Does it worth trying to reach out for the company?

    PS: Paul, whatever you do, don't start scraping out the glued inner liner!
  • 06 Dec 2023 20:25
    Quote
    Reply # 13287931 on 13226713
    Anonymous member

    A quick note on Aluminum alloys and their strength. It appears that Nedal, for example, uses "at least" values while some of the sources I gave use "typical" values. At least that seems to line up well with this wiki article. I would guess some of these differences have to with where in the world the metal is alloyed and how accurate the the process controlled. Suppliers who control their own source may feel confident using values they can achieve, while importers would have to use the "at least" value.
       " ...there is nothing - absolutely nothing - half so much worth doing as simply messing about in junk-rigged boats" 
                                                               - the Chinese Water Rat

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