Ingeborg, Arne's Marieholm IF

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  • 14 Dec 2014 12:19
    Reply # 3169935 on 3032430
    Anonymous member (Administrator)

    Dennis, my choice is based on what I can get  -  my motto is

    "Cheap, available and good enough"

    The fine thing with the 6m aluminium tubes is partly that I get them in the strong 6082-T6 alloy (250MPa versus 180MPa of the 6063-T6 alloy), and partly that it lets me transport that tube on the roof rack of my car, right to the harbour. The wooden top section can be made separately and mated with the lower section in the harbour.  If I find another, thinner aluminium tube to add as a top section, I may well go for that.

    Arne

  • 13 Dec 2014 15:06
    Reply # 3169697 on 3032430
    Deleted user

    Arne,

     I wonder why you are going with the hybrid mast rather than all alloy?  I have found a source to a 4.77mm x 152 mm x 9.8m flagpole made of 6063-t6. 

    Is there an advantage to have the top 1/3rd wood?

    regards,

    Dennis ( Connecticut, USA)

  • 12 Dec 2014 04:11
    Reply # 3168883 on 3168590

     

    Arne

    The mast on Mariposa is 9.9m from memory, but I think a 9.7m mast would be fine.

    Peter

  • 11 Dec 2014 20:05
    Reply # 3168548 on 3032430
    Anonymous member (Administrator)

    Dennis

    just a quick answer. Yesterday I uploaded the planned new sailplan for my IF, Ingeborg. to 'my' page. See under sailplans, here:

    http://www.junkrigassociation.org/arne

    The total length of the mast will be 9.7m, quite a bit shorter than an IF mast, I guess, and maybe even a bit shorter than that of a Contessa 26, I don't know.

    The mast is planned to be a hybrid aluminium and spruce job (The joint can be spotted on the sail plan).

    The lower aluminium section will be a 6m long tube, 150 x 5mm, made of 6082-T6 alloy. The top section will add 3.7m (plus 60cm inserted into the tube). This will be reduced to about 90mm diameter in the top. I have started to produce a write-up about the hybrid masts, and use the mast for the IF (and for Frøken Sørensen) as examples.

    Arne 

  • 11 Dec 2014 17:57
    Reply # 3168438 on 3032430
    Deleted user

    Arne,

    i am new to the group and plan to shadow your next project.  I too am in search of a IF to convert to JR.  They are not that plentiful here in the US and I may have to compromise with a Contessa 26.  

    I am initially interested in your mast selection.  Same height above deck as existing bermuda rig?  Lamp pole, flag pole or wood? 

    I look forward to your postings

    Dennis Gibbons

  • 07 Jul 2014 01:29
    Reply # 3038829 on 3032430

    I didn't realise that the Marieholm had been 'tuned up'.  In that case, she should be quite wonderful to sail - fast and handy.  A joy.  She looks very nice inside.  I'm sure you'll find it hard to go home at the end of a day's sailing.  Once she has junk rig, of course!

  • 06 Jul 2014 21:52
    Reply # 3038764 on 3032430
    Anonymous member (Administrator)

    (Reply on Annies posting in the "Another write-up..." topic)

    Annie,

    that would not be fair to the Contessa 26. Remember, the Marieholm IF is slightly up-tuned compared with the Nordic Folkboat. The Contessa, on the other hand, has been detuned to make her a roomier cruiser than the original folkboats.

    Some dry numbers:

    Nordic Folkboat:
    Displacement=1930kg
    Ballast=1025kg (53%)

    Marieholm IF:
    Displacement= 2150kg
    Ballast= 1250kg (58%)

    Contessa 26:

    Displacement=2449kg

    Ballast=1043kg (43%)

     

    Their junkrigs will be quite similar, but the fact is (and often forgotten) that no rig can sail faster than the boat it has been attached to.

    I don’t write this to put the Contessa in a bad light, but only to point out that the IF is closer to The Ultimate Sailboat. I measured the cabin’s headroom of Ingeborg the other day: The resulting 139cm give hints about a cosy interior...

    Cheers, Arne

     

    Last modified: 09 Feb 2015 09:59 | Anonymous member (Administrator)
  • 27 Jun 2014 09:47
    Reply # 3032717 on 3032430
    Deleted user

    Nice boat Arne. I think she will look great with JR !


    Antoine

  • 26 Jun 2014 21:59
    Message # 3032430
    Anonymous member (Administrator)

    After selling my 3 ton Johanna, my hunt for a smaller all-weather keelboat resulted in buying a Marieholm IF 26, a couple of days ago. Although a bit heavier than the 1500kg I aimed for, I still think I will be able to handle her much more easily than Johanna. She will only need a 6hp engine, at26kg(Johanna’s 9.9hp, 50kg), and only 35sqm sail (Johanna’s 48).

    Some basic dimensions:

    LOA                       7.86m
    LWL                       6.05m
    Beam                    2.25m

    Draught               1.21m
    Displacement    2150kg
    ballast (iron)      1250kg (58%)

    Mainsail (Bm)    16sqm

    Genoa 1              19sqm

    Working jib        10sqm

    This summer (2014) there will be little to tell about her. I will only do some sailing in her with her original Bermuda rig. The plan is to convert her to JR in the spring 2015. The rig may end up looking about like this. It is a downscaled version of one of my master sails (AR=1.90), shown in chapter 4 of “The Cambered Panel Junk Rig”, found on “my JRA page”.

    Cheers,
    Arne

     

    Last modified: 29 May 2023 10:40 | Anonymous member (Administrator)
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