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Sailplan feedback

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  • 20 Apr 2017 09:22
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    Reply # 4765103 on 4764434
    Anonymous member

    I used Topgun 9/Mustang for Tystie's latest sails. It seems to me that both Odyssey and Topgun 9 have a lot of resin filler/waterproofer relative to the amount of woven cloth they contain, and when this breaks down/gets abraded, as it will, then the problems start. For this size of boat, I would agree with Kurt that Topgun 11 is a good choice, with its longevity having been proven. 

    The sailplan looks to me as though it will work without too many hangups. Extend the top sheeted batten so that the uppermost sheet spans tend to hang clear of the sails when slack, and then I think the sheeting will be OK. Whenever I've felt greedy and put on "just a little more sail area", I've regretted it...
  • 20 Apr 2017 08:56
    Quote
    Reply # 4765069 on 4764434
    Anonymous member

    I think you'll find more details about Pacific Spray on the website, if you rummage around.  Rob and Maren were pretty pleased with their boat and I think Walter and Estelle who now own her are not dissatisfied.  With a boat like a Spray you have to be realistic about what she will do: she's never going to be a light-airs flyer.  On the other hand, these heavy-displacement boats forge on for long distances under their own momentum and in fickle winds can do better than their lightweight sisters who stop dead between each puff of wind.

    Don't even think of Odyssey for this rig!
  • 20 Apr 2017 04:38
    Quote
    Reply # 4764642 on 4764610
    Deleted user
    David Webb wrote:

    Hi Steve,

    Rob Prince had a steel Spray 38 or 40. He would be a good source for feedback on your proposal. I know that he eventually put double sheeting on the foresail because the gap to the main was not enough and he had a lot of problems with sheet hangup. I had a Roberts Offshore 38 and put a 1000 sq. ft. lugsail ketch rig on her and she was not over canvassed. Your boat is quite a bit heavier so I would suggest as much sail as you can set would be the way to go. I find that more balance area in the sails works better for me as it reduces the loads on the yard hauling parrell and on the luff hauling parrells. It also moves the C of A further forward helping with mast position and creates less weather helm when you bear off.

    With regard to sail material, I believe that Odyssey is a bit light for sails of the size suggested for your boat. Also your displacement is quite high and this leads to higher loads on the sails so a heavier cloth is advisable.

    All the best with the project, David.

    Yeah I would honestly prefer to be closer to 1000sqft, thinking on it I might be able to add two additional lower panels bumping the sqft per sail up to around 520sqft which would give me 1040sqft of sail area. That really only increases overall mast height by about 10 or 12 foot which should put it somewhere in the range of 45-50 foot. 


    I will probably look at top gun in the 9 oz or so weight, I believe Odyssey is around 6. 
  • 20 Apr 2017 04:13
    Quote
    Reply # 4764610 on 4764434
    Anonymous member

    Hi Steve,

    Rob Prince had a steel Spray 38 or 40. He would be a good source for feedback on your proposal. I know that he eventually put double sheeting on the foresail because the gap to the main was not enough and he had a lot of problems with sheet hangup. I had a Roberts Offshore 38 and put a 1000 sq. ft. lugsail ketch rig on her and she was not over canvassed. Your boat is quite a bit heavier so I would suggest as much sail as you can set would be the way to go. I find that more balance area in the sails works better for me as it reduces the loads on the yard hauling parrell and on the luff hauling parrells. It also moves the C of A further forward helping with mast position and creates less weather helm when you bear off.

    With regard to sail material, I believe that Odyssey is a bit light for sails of the size suggested for your boat. Also your displacement is quite high and this leads to higher loads on the sails so a heavier cloth is advisable.

    All the best with the project, David.

    Last modified: 20 Apr 2017 04:20 | Anonymous member
  • 20 Apr 2017 03:48
    Quote
    Reply # 4764584 on 4764434
    Anonymous member

    Hi Steve,

    Sheeting Distances - I can assure you that if you allow less room down and aft of your sails' clews than Hasler & McLeod recommend, (like I did) you'll have more snaggles and poorer sheeting angles, than if you allow more (like I wish.) Since your height above deck isn't yet settled, I guess you can still play around, check Practical Junk Rig, play some more...

    Sail Material - I'll praise Top Gun for years yet. I've just unbent our sails, (for a preventative re-stitching) which are still tough and undamaged after over ten years well-exercised and never covered. So Top Gun is great for flat-cut sails about the size of yours. For cambered panels, I can't say for sure. 

    Cheers, Kurt
  • 20 Apr 2017 01:58
    Quote
    Message # 4764434
    Deleted user

    Hey folks!

    I'm in the process of converting my steel hull Bruce Roberts Spray 38 to a schooner rig. I'm currently looking at around 860 square foot of sail area broken into 2 430 sq ft sails. My overall design is effectively a Johanna design with 15 foot battens/boom. I followed Arne's design steps and I think the below gives me a good set of sails but I need some feedback on the sheeting. From the edge of the sail to the stern rail I'll end up with about 4.5ft of area, is that enough? If not I have another 2 - 3 foot from the square tube steel davits that are welded on the back of the boat, that's easily strong enough to take the sheets if I need the additional space. Between the sails I have 3.5 foot, I believe that's enough?

    The blue are the masts positions I'm looking at, 5 degree rake on the forward mast. I have some room up front that I think I could move the forward mast 1-2 more foot forward if need be. On top of that the sails will sit higher than the plan shows right now, I have to get back to my boat (it's in Kingston, Ontario, I'm in Ohio) to get measurements on the top of my doghouse and the Bimini/Dodger I'm going to build for it. 

    Also, sail material. I'm considering perhaps Mustang? I've read the posts on Odyssey having some decay problems after a few years, is this still the case?

    Anything here seem completely amiss? 

    http://stevewallaceart.com/images/SailPlan.png

    Last modified: 20 Apr 2017 02:01 | Deleted user
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