new split junk Oceaan 22

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  • 24 Sep 2020 16:26
    Reply # 9262175 on 9029100

    Now the end of the saling season is near in these parts I would like to share some experiences sailing my SJ rigged Oceaan 22  .

    This rig seems to have the ability in light air to keep the boat moving if you point way too high. We sailed up a canal too narrow to tack and found the rig still pulling if I kept it more or less on the same bow and not turned it straight into the wind. It kept moving even though the jibs were not doing anything as their 12 degree sheeting angle put them straight into the wind. The mains on the other hand remained filled or just about and that was enough to keep the boat moving and reach the upwind shore where we could bear of and get the jibs inflated.  I have sailed and raced traditional leeboard boats a lot and did a lot of sailing in general so I am familiar with the trick of steering the boat (nearly) straight into the wind at the right moment to round the windward mark or something like that. I cannot remember an occasion where a boat kept going upwind like this. Mind you this is light wind mode, I don’t think it would work in say force 3.

    Main panels have 10% camber and are horizontal shelf foot construction. The jibs also have 10% camber and 12 degrees sheeting angle. I know Slieve thinks less camber in the mains should be ok but I couldn’t think of a reason why less camber might be better. There is no sign that indicates too much camber in the mains, both jibs and mains luff at the same time and there is a lot of power.

    Reaching and downwind as every junk sailor knows is fun, fast and very easy. It is important to play with halyard and downhauls to get my SJ to set well on different courses to the wind.

    There were a couple of occasions where we sailed upwind in the company of comparable size boats and I was very pleased to see that that we sailed as high as the other boat with better speed. We sailed away from them in a convincing way. I am not sure how much the hull has to do with this as we didn’t meet another Oceaan22 to compare to. But the victims were well known and respected boats, a New Classic 700 and a Clever 23. Wind was in both cases about 3 Beaufort. The NC 700 was overtaken on a lake going upwind with both boats sailing very much the same angle to the wind. We were quite close to each other so it was easy to see any difference or similarities. We got the same puffs and we just passed them closely to windward and kept increasing the lead. Very satisfying; forgive me, I did a lot of racing…

    The other one that was quite clear was when we sailed up a canal and we could just lay the course upwind on starboard tack. When we rounded the corner and pulled the sheet there was a Clever 23 at it in the same direction and we were a bit in front of them. We couldn’t keep the port side of the canal like we wished to keep some leeway because of the traffic and so we ended up in the same position as the other boat on the downwind side of the canal. These canals have soft shores, often shallow, so it’s hard to decide when to tack. Also there are reed banks all over, so on the lee side you will have better wind. We could just about keep the jibs pulling and in the puffs creep upwind gaining some room to give away as the wind headed. I could see the Clever 23 doing just like us keeping to the lee shore in the same way. In the puffs we clearly ran away from them and because of the extra speed I imagine we had less trouble keeping our height. We didn’t need to tack as the other boat eventually had to, and it was great being able to sail that canal in one go, sailing away from the other boat. Obviously we had the advantage of having more sail area up high compared to the pointy rig, especially between the reed banks, but we also did sail the same angle to windward.

    Later I checked the specs and saw sail areas of the NC700 (23m2) and the Clever 23 (22m2) are comparable to our SJR which is 23 m2. Of course it is complicated to compare boats speeds etc but it has to be taken into account that we (junk rig sailors) mostly used home-made sails and we usually compare to pro-built sails. My sail is not perfect so there is clearly room for improvement there. Which is part of the fun for me.

    The conclusion is that the SJR is a big success on the Oceaan22 and performs even better than I had hoped. Thanks again to Slieve.



  • 12 Jun 2020 16:35
    Reply # 9033101 on 9029100
    That is a really sharp looking rig, Rudolf.

    Thank you for sharing.


  • 12 Jun 2020 14:40
    Reply # 9032877 on 9029100

    Excellent news Rudolf. 

    Your sail looks good. Now the fun can begin. 

    Looking forward to hearing your adventures. 

    Fair winds, and enjoy. 


  • 11 Jun 2020 21:51
    Reply # 9031537 on 9029100

    Hey Rudolph,

    looks great, can’t wait to see sailing photos.

  • 11 Jun 2020 21:41
    Reply # 9031491 on 9029100

    Thanks Graeme and David, 


  • 11 Jun 2020 10:34
    Reply # 9030215 on 9029100

    Well done Rudolph! Another boat joins the JR fleet.

    That sail is looking very smooth, I must say.

  • 11 Jun 2020 03:51
    Reply # 9029558 on 9029100

    Hi Mark

    I think all the different modern junk variants have their pro's and cons.

    In the case of a split junk rig, the mast is placed not quite so far forward as it would be in the case of a contiguous (unsplit) junk sail and this may or may not be more convenient, depending on the internal accommodation arrangements - so having a choice of rigs gives a person converting to a junk rig just a little more flexibility there.

    If you want to know the thinking which lead to the development of this rig, and the type of aerodynamic advantages which were being sought, then click on you click on the file "Some Thoughts" where you will get a background to it, then go to AYRS Catalyst 37.pdf which will then give you the general idea of how you might expect the rig to behave.

    If this interests you and you want to read more, then there two other folders by Slieve which can be found in his technical notes which are on the JTRSA website, Members' Section, under "Documents" - or just use this link.   This will pretty much explain all you would need to know. I made a sail using these notes (together with some extra help and advice from Slieve) and I am very happy with mine. Its one more variation on top  of the other contemporary variants (such as those developed by Arne Kv, David T and others) and it means people these days have a pretty good choice and pretty good back-up and advice too.

    I would recommend anyone thinking about rigs to go to the link above (which is the technical section of the Members' Area, JRA website) - and read through all of the technical notes there, especially those of David T, Arne Kv and Slieve McG, who are each active on the forums, and you will then be pretty well-informed, up-to-date and in a position to evaluate for yourself, which type of rig would suit you best. Don't get paralysed by choice: they all seem to make their owners very pleased, and they are all backed up by good advice from the people who have developed them.

    Rudolf: great to see your new rig, which is looking good, and I too found Slieve and Edward to be very helpful.

    Last modified: 11 Jun 2020 06:31 | Anonymous member
  • 11 Jun 2020 03:13
    Reply # 9029530 on 9029100

    Hi I'm wondering if anyone could explain to me what are the advantages of the Slit Rig configuration as seen on Ocean 22?  It seems fascinating & I'm seeing it more at least on this forum but don't really understand its point. Regards Mark

  • 10 Jun 2020 22:48
    Message # 9029100


    I am very glad to be able to show the new split junk rig on my VanderStadt Oceaan22. 

    The boat was left stripped of its original rig and rudder by some runaway boys and I bought it and converted it in the past year or so.

    The new rig is made of 80gsm nylon cloth.  I need some more time to sort it all out and maybe find some better suited lines here and there but we did sail it and I trust I can get it to behave as in the photos all the time every time given time ;) 

    A big thank you to Slieve McGalliard for his design and support and also to Edward Hooper for the photos he sent me and his encouragement.


    Rudolf vd Brug

    3 files
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