The Metamorphosis of Jasmine08 a 32ft Samson C-Mist

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  • 12 May 2021 21:03
    Reply # 10474613 on 10420926

    Progress update:

    The Mast Step

    and

    The Partners

    The links will take you through to the relevant albums with explanatory captioned pictures.

    2 files
    Last modified: 12 May 2021 21:09 | Anonymous member
  • 04 May 2021 15:23
    Reply # 10440792 on 10420926
    Anonymous member (Administrator)

    David, I always draw my rigs 'naked' (..that's one reason why I now add a bit more drift between yard and mast top...).
    For the user I either suggest the Johanna-sheeting or a double-, that is upper-lower sheeting (better on this big sail). 
    Halyard would be 5-part and then there would be an YHP, a THP and the FUP. In addition, I would suggest a running topping-lift on this yacht, which I would top up before taking the first reef. This will increase the clearance between the reefed bundle and the sea, when running before. 
    Even if the topping lifts are attached only 2/3 or 3/4 aft on the boom, there will be little or no clearance of the yard with only 3 or 4 panels set, so this yard should have a 1-metre light extension to avoid trouble. Fitting a burgee to that extension is very useful: When running before, and by the lee, the burgee, flying at good distance from the sail, shows the real wind direction up there.

    The Chapter 7 of 'The cambered panel junk rig' is hopefully useful when fitting the lines, both standing and running.

    Arne

    Last modified: 04 May 2021 16:15 | Anonymous member (Administrator)
  • 04 May 2021 14:50
    Reply # 10440668 on 10420926

    And the sheeting, Arne? Upper and lower sheets? Looking at Victor's sailplan, even with upper and lower sheets, the sheet to the top batten would probably snag the batten below it. I'd decrease the angle of that top sheeted batten.

    Your sailplan looks trouble-free to me, however the sheeting is done: a good example of foreseeing practical issues (balance in particular), and of not trying to cram on the absolute maximum amount of sail. I like it.

  • 04 May 2021 13:45
    Reply # 10440492 on 10420926

    Thanks Arne. Learning day by day. 

  • 04 May 2021 10:27
    Reply # 10440002 on 10439139
    Anonymous member (Administrator)
    Frederik wrote:

    Good luck with the conversion Hans-Erik. 


    And Arne. Could you say a bit more about the pros & cons between your an Victor’s  sail design?

    in a different thread maybe? 


    First of all, I didn’t know about Victor’s sailplan when I started on mine. My first take on it was very close to Victor’s version, with 70° yard , battens at 5.95m and SA= 63.5sqm.

    However, I worried about weather helm. When a boat reaches 10 tons and has an un-balanced rudder, you’d better hit perfect balance, or you will struggle forever with the tiller (..or end up fitting hydraulic wheel steering...). Choosing a sloop JR instead of yawl, ketch or schooner makes it even more interesting.
    That first sailplan wouldn’t let me shift the sail any further forward. Then, since I had just drawn a sloop JR for a fellow in NZ, I decided to try that one. This sail has been modified to a yard angle of just 65° and that allows one to increase its balance to as much as 21-22% versus only 16-17% with a 70° yard.
    The rig shown below sits in its maximum forward position. Its CE is forward of the Bermuda rig’s CE, and about 50cm forward of the JR that Victor made. Still, this sail can be shifted 30-50cm aft in case of lee helm (unlikely). In other words, I feel that my second rig gives better freedom to fine-adjust the balance to produce a light helm.
    This high-balance sail also brings the CE closer to the mast, so the increase in weather helm when reaching and running will be lower than with a low-balance sail of the same chord.
    Combine the high balance with a 10° rise of the boom, and the boom will be less likely to dig into the sea.

    Arne

    PS: The centre of a real mast, at full thickness, will have to move 10-15cm aft of the thin mast line I have drawn, and so will the sail, of course. Its CE will nevertheless end up well forward of that of the Bermudan rig.

    PPS: Does one live in or on NZ?


    Last modified: 05 May 2021 09:55 | Anonymous member (Administrator)
  • 04 May 2021 07:33
    Reply # 10439392 on 10420926

    These boats have a good reputation.  Well done finding one that seems to be a good example.  I'm sure she will look after you and respond well to her new rig. Congratulations for taking the next step towards fulfilling your dream!

  • 04 May 2021 05:23
    Reply # 10439139 on 10420926

    Good luck with the conversion Hans-Erik. 


    And Arne. Could you say a bit more about the pros & cons between your an Victor’s  sail design?

    in a different thread maybe? 

  • 02 May 2021 10:06
    Reply # 10425405 on 10420926
    Anonymous member (Administrator)

    Here is Victor's and my version presented side by side at the same scale to let you know what we are talking about.
    Arne

  • 01 May 2021 23:11
    Reply # 10422396 on 10420926

    Very similar to the Westsail 32 built in Southern California. One of these won its class in the Transpac race, so no slouch when properly rigged and sailed. My boatbuilder friend Ron Blair completed a Kendall version (flush decked) of this and sailed it to New Zealand. She averaged around 7 knots on all of the passage legs. I sailed the first leg from Los Angeles to Cabo San Lucas with him. We had 35 up to 50 knots of wind from LA to past Magdalena Bay and she handled it with no problems. Good design!!

  • 01 May 2021 22:09
    Reply # 10422152 on 10420926

    “Proper little ocean voyager”- yes, and worth waiting for I should think. I am sure she will be wonderfully spacious and comfortable too, a very big boat for a 27’ waterline length.  I am sure I am not the only one looking forward to following the evolving dream on this thread. Best wishes for a successful conversion.

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