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Hunter liberty cat ketch

  • 17 Mar 2024 21:08
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    Reply # 13330788 on 13276977
    Anonymous member

    The Junk main and bermudan mizzen seem like a really good combination - I'll be sailing my Liberty 22 singlehanded mostly and like the idea of only going on deck when it suits me.


    The original mast will probably not do for a junk main - it has to be round section i know. I could make one I guess - I have a copy of PJR and could get the scantlings, but does anyone know how I might procure an aluminium mast with the correct taper?


    Thanks,


    Roger.
  • 18 Nov 2023 09:54
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    Reply # 13281054 on 13276977
    Anonymous member (Administrator)

    This article https://www.pbo.co.uk/boats/winning-ways-with-a-junk-rig-81347

    may be of interest as it includes discussion with JR Hunter Liberty owners

     
  • 12 Nov 2023 17:45
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    Reply # 13278499 on 13276977
    Anonymous member

    Thank you for looking at this Arne. It looks like the perfect rig for me and my boat. I will start making plans to make this sail over the winter. I wonder if I can use the existing mast for this sail ? It is a sleeved and reinforced mast from the second lot of  Liberty boats. I can definitely cope with raking aft and maybe cutting down on length if need be. There is a Liberty main mast for sale on eBay which I might be able to buy. 
  • 12 Nov 2023 16:38
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    Reply # 13278478 on 13276977
    Anonymous member (Administrator)

    Maybe something like this?
    I guess a separate port-starboard sheet system, tied to the end of the battens, and then down to the aft corners of the cabin would work?

    I have tilted the sail two degrees aft. This should make the sail just about bullet-proof against sheet-batten tangle.

    Arne


    (Check Arne's sketches, section 7)


    Last modified: 12 Nov 2023 22:13 | Anonymous member (Administrator)
  • 12 Nov 2023 15:22
    Quote
    Reply # 13278465 on 13276977
    Anonymous member

    Unfortunately moving the mizzen mast would not be possible without a major rebuild,but I wonder if the junk mainsail would work if it was smaller in area ? Say 130 sq ft and the mizzen in the same position but a smaller sail about the same size as the existing reefed mizzen. The boat hull is easily driven and is well balanced with either a reef in the main or a reef in the mizzen.
  • 12 Nov 2023 12:18
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    Reply # 13278440 on 13276977
    Anonymous member (Administrator)

    Interesting idea, Bill.
    Is there a simple way to move the mizzen mast , say 50cm aft from the present position?


    Arne
  • 12 Nov 2023 11:16
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    Reply # 13278436 on 13276977
    Anonymous member

    My other thoughts were to stay with the existing ketch  mizzen sail and convert the main to Arne’s junk design sail. The existing bermudan sail is easy to reef and control from the cockpit and balances the boat well. 
  • 11 Nov 2023 21:56
    Quote
    Reply # 13278385 on 13276977
    Anonymous member (Administrator)

    Bill,
    Hans Shäubel and his wife visited Stavanger in 2001 on a cruise to Norway. A photo of his boat shows that the mast sits right in front of the cabin: That boat was a modified Liberty with a higher freeboard, but the trunk cabin appears to be very similar to the original.

    Now I couldn’t keep my fingers away, so I plonked a sloop JR onto the plans, after having wiped out the original rig. The JR is a down-sized master sail with AR = 2.00, but with the lowest panel removed. Batten length was set to 4.00m.

    Then I got a bit cold feet so re-installed the ketch rig for comparison. Actually I think the JR will be all right without causing a lee helm, after all. I would have tried it like that, but no guarantees...

    (Full size diagrams at Arne's sketches, Section 7)
  • 08 Nov 2023 23:09
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    Reply # 13277265 on 13276977
    Anonymous member
    Anonymous wrote:

    Is the main/foremast on the hunter liberty cat ketch a good position for a conversion to single mast junk rig. I know that Golden Wind had a single mast junk rig but was the mast in a different position?

    This person has:

    Check this page It also has the drawings of the original which should make it possible to figure out the original CA and try various JR drawings on top to see if it is easy to match the same CA

    The centre of area looks forward compared to this one but how well it works I don't know. You will notice that the sail is quite a low AR to move the CA aft as much as practical. You might try contacting him and asking how it worked out.

    Last modified: 08 Nov 2023 23:16 | Anonymous member
  • 08 Nov 2023 15:24
    Quote
    Message # 13276977
    Anonymous member

    Is the main/foremast on the hunter liberty cat ketch a good position for a conversion to single mast junk rig. I know that Golden Wind had a single mast junk rig but was the mast in a different position?
       " ...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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