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Pondering Seablossom's rig

  • 26 Oct 2011 02:18
    Quote
    Reply # 733246 on 733178
    Deleted user
    Paul Thompson wrote:
    Jeff McFadden wrote:
    That is going to work, I feel quite confident.

    Ok then Jeff, I'll finalize the drawing and do the specs for you you. I suggest that you build the sail from Odyssey III and you use aluminum for battens and yard. I will post the complete specs for the yard and battens and all the needed drawings to your Seablossem folder when done.

    Just wondering: why Odyssey III rather than Top Gun?
  • 26 Oct 2011 00:17
    Quote
    Reply # 733178 on 733170
    Anonymous member
    Jeff McFadden wrote:
    That is going to work, I feel quite confident.

    Ok then Jeff, I'll finalize the drawing and do the specs for you you. I suggest that you build the sail from Odyssey III and you use aluminum for battens and yard. I will post the complete specs for the yard and battens and all the needed drawings to your Seablossem folder when done.
  • 26 Oct 2011 00:07
    Quote
    Reply # 733170 on 732281
    Deleted user
    Paul Thompson wrote:Hi Jeff,

    I have uploaded a new pdf with a few more measurement points on it. You can safely add a foot to the distance shown between the sail and the coachroof. However I like to keep the sail as low as possible. So unless you have an unusually large fore hatch it should be OK.

    Once you've confirmed all is workable, I'll run up a fully dimensioned drawing and hardware spec for you.

    That is going to work, I feel quite confident.
  • 25 Oct 2011 02:33
    Quote
    Reply # 732281 on 726309
    Anonymous member
    Hi Jeff,

    I have uploaded a new pdf with a few more measurement points on it. You can safely add a foot to the distance shown between the sail and the coachroof. However I like to keep the sail as low as possible. So unless you have an unusually large fore hatch it should be OK.

    Once you've confirmed all is workable, I'll run up a fully dimensioned drawing and hardware spec for you.
  • 23 Oct 2011 04:42
    Quote
    Reply # 729963 on 726309
    Deleted user
    And as long as the deck clearance forward is sufficient I will be ecstatic with the design.
    Last modified: 23 Oct 2011 04:43 | Deleted user
  • 23 Oct 2011 04:40
    Quote
    Reply # 729960 on 729854
    Deleted user
    Paul Thompson wrote:
    Jeff McFadden wrote:
    Paul,
    Jonathon has hit the nail on the head here.  Boat and sail look very elegant.

    Jeff, is the clearance by the main hatch sufficient at 94ft? Hoe do you want to build your sail? Arnes method or shelf foot? Arne's method is the quickest, simplest and easiest for a first time sailmaker. Shelfoot may give you a tidier sail but is more complex and much more time consuming.However, if you decide to use Arne's method, you should go the whole hog. That is, use all his ideas don't mix 'n match as you tend to land up with a sail that takes three times longer to make than if you just kept to Arne's guide lines.

    If you are happy with the design, I'll go ahead and produce a dimensioned drawing and hardware spec's for you.

    My only concern about clearance will be the cabin hatch forward. Can you tell me how far the sail is above the deck at the partners? That should let me figure that clearance.
    I am comfortable that the clearance at the companionway hatch will be more than ample.
    I intend to use Arne's system right out of his writings. I have a photo that I will post of Broremann's sail showing shadow lines from the halyard and mast lift, and if a shelf foot looks better to someone else that is fine with me. I am confident that I will be happy with an Arne sail if I can just execute it to my satisfaction.
  • 23 Oct 2011 01:02
    Quote
    Reply # 729854 on 729746
    Anonymous member
    Jeff McFadden wrote:
    Paul,
    Jonathon has hit the nail on the head here.  Boat and sail look very elegant.

    Jeff, is the clearance by the main hatch sufficient at 4ft? Hoe do you want to build your sail? Arnes method or shelf foot? Arne's method is the quickest, simplest and easiest for a first time sailmaker. Shelfoot may give you a tidier sail but is more complex and much more time consuming.However, if you decide to use Arne's method, you should go the whole hog. That is, use all his ideas don't mix 'n match as you tend to land up with a sail that takes three times longer to make than if you just kept to Arne's guide lines.

    If you are happy with the design, I'll go ahead and produce a dimensioned drawing and hardware spec's for you.
  • 22 Oct 2011 21:59
    Quote
    Reply # 729746 on 728781
    Deleted user
    Jonathan Snodgrass wrote:

    Boat and sail look very elegant, and if it looks right it generally is right.   


    Paul,
    Jonathon has hit the nail on the head here.  Boat and sail look very elegant.
  • 21 Oct 2011 19:55
    Quote
    Reply # 728781 on 726309
    Anonymous member

    Boat and sail look very elegant, and if it looks right it generally is right.   

    Last modified: 21 Oct 2011 19:57 | Anonymous member
  • 21 Oct 2011 19:31
    Quote
    Reply # 728756 on 728479
    Deleted user
    Paul Thompson wrote:Hi Jeff,

    I have just uploaded a preliminary sail plan based on the info that I currently have. It's in your Seablossem folder Propesed Junk Sail . The sail is Arne's Johanna sail, scaled to fit Seablossem and then stretched a little to get more sail area but still to fit your mast. The mast is about as far forward as is viable. At 465 Sq.Ft you have 18% more sail area than the standard rig (which is 394).

    Check if the clearances are adequate and we can then fiddle as need be. The CE of the junk sail is in the same horizontal position as the original. As the junk sail is quite forgiving with regards to balance, I see no issues there.

    Paul, the dimensions I gave you are good. Diameter at the new partners will be 7.5 inch. The on-deck measurements I quoted were to mast center.
    I haven't had a chance to look at your preliminary plan yet. It's hard to view images of any sort on this phone. When I get back to a real computer I'll look.
    Jeff
       " ...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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