Galion 22 conversion

  • 11 Nov 2017 13:10
    Reply # 5581322 on 5070195

    Arne has very kindly drawn two sailplans for my Galion. They have quite a generous sail area with aspect ratios of 2.05 and 2.15.

    Now that I have inspected the hull plan more closely, it hit me: It's very difficult if not impossible to have enough bury for a 9-10 meter mast if  it is to be installed through the foredeck. The bottom shape of the hull rises very steeply at the front.

    This is bad news, as the straight foredeck would be perfect for other reasons (interior space, sail balance, saving the practical forehatch).

    I think it's possible to build more thickness to the mast area, up to the lower end of the forehatch, hut I don't know it would be enough.

    Any ideas, please?

    The other potential places for the mast would be through the forehatch (not optimal plus quite difficult because of the curvy shape) or right in the front of the cabin bulkhead/BR mast (too far back).


    Last modified: 11 Nov 2017 13:45 | Anonymous member
  • 04 Nov 2017 21:51
    Reply # 5536343 on 5510411
    ueli lüthi wrote:

    hi annie

    Annie Hill wrote:

    …Marcus is making his mast with a 6m tube and (because he is sensitised to epoxy and can't work with it) he is having a carbon reinforced/glass fibre topmast made.

    he should take care about the separation/isolation of the two sections – as i learned from jra people, combinations of carbon fibres and aluminium can lead to electrolytic corrosion.

    utnik


    I believe that the outermost layer is of epoxy/glass, but he is well aware of the issue.
  • 03 Nov 2017 12:44
    Reply # 5514788 on 5514203
    Scott Dufour wrote:

    Jami,

    I would squint very hard in good light at a supplier who claims to make a T6 tapered pole.  T6 is pretty hard stuff and I don't know of any suppliers who have the equiment to roll one into a taper.

    I've had a few salesmen say it's T6, but when I get a hold of a copy of the quote and spec sheet, it's always T5.

    True. The fully hardened character of T6 means that it is no longer ductile enough to roll a taper. 
  • 03 Nov 2017 12:33
    Reply # 5514585 on 5514203
    Anonymous member (Administrator)
    Scott Dufour wrote:

    Jami,

    I would squint very hard in good light at a supplier who claims to make a T6 tapered pole.  T6 is pretty hard stuff and I don't know of any suppliers who have the equiment to roll one into a taper.

    I've had a few salesmen say it's T6, but when I get a hold of a copy of the quote and spec sheet, it's always T5.

    If I have understood this T4, T5 and T6 stuff, this is about tempering the alloy over some time and then lowering the temp over some time. Could it be  that the tapered poles are rolled to shape first , and only tempered to T6 standard afterwards?

    Arne


  • 03 Nov 2017 12:23
    Reply # 5514462 on 5070195

    Ok, thanks for the warning.

  • 03 Nov 2017 12:02
    Reply # 5514203 on 5070195

    Jami,

    I would squint very hard in good light at a supplier who claims to make a T6 tapered pole.  T6 is pretty hard stuff and I don't know of any suppliers who have the equiment to roll one into a taper.

    I've had a few salesmen say it's T6, but when I get a hold of a copy of the quote and spec sheet, it's always T5.

  • 03 Nov 2017 09:45
    Reply # 5512974 on 5070195
    Sketches are still on their way, and I haven't decided yet, how high AR I dare to go for.

    But I think about 10 meters.

  • 03 Nov 2017 09:03
    Reply # 5512606 on 5511277
    Anonymous member (Administrator)
    Jami Jokinen wrote:

    I contacted the seller of the al-flagpole (dimensions in the earlier posts). He said it is T6 alloy.

    What will the total length of your mast be, Jami?

    Arne


  • 03 Nov 2017 06:27
    Reply # 5511277 on 5070195

    I contacted the seller of the al-flagpole (dimensions in the earlier posts). He said it is T6 alloy.

  • 03 Nov 2017 04:39
    Reply # 5510411 on 5070195

    hi annie

    Annie Hill wrote:

    …Marcus is making his mast with a 6m tube and (because he is sensitised to epoxy and can't work with it) he is having a carbon reinforced/glass fibre topmast made.

    he should take care about the separation/isolation of the two sections – as i learned from jra people, combinations of carbon fibres and aluminium can lead to electrolytic corrosion.

    utnik

    Last modified: 03 Nov 2017 04:39 | Anonymous member
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