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Yuloh pivot

  • 12 Jun 2012 13:16
    Quote
    Reply # 962988 on 958948
    Anonymous member

    I know nothing about Yuloh's but ... as usual ... one should never let total lack of knowledge debar one from contributing to a web discussion ...

     

    The enginless Contessa 26 which was at Plymouth during the recent rally got his Yuloh out and made very impressive progress around the outer reaches of Plymouth Sound.  From what I saw he appeared to have it working very satisfactorily.  (The fact that when the wind came up again his 26 foot sloop outsailed Lexia, our 32 foot schooner, is a separate matter which I, of course, put down to him not lugging round a ton of engine, diesel for engine, diesel for heater, diesel heater, liferaft, Tinker Tramp lifeboat, Jordan Series Drogue, a fortnights supply of fresh water, beaching legs, twice the numbers on board, etc, etc, Or am I making excuses? )  The owner is not an Association member but others  will know who he is and  how he may be contacted.  I think that the Hon Sec knows him. 

    Last modified: 12 Jun 2012 13:17 | Anonymous member
  • 12 Jun 2012 12:29
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    Reply # 962957 on 958948
    Anonymous member
    A combination of a double ended boat and a shoestring budget means the yuloh is my only realistic option for propulsion sans sail, so I have no shortage of motivation to persist with getting mine working!

    Also my boat is only a tiddler so I should be able to scull along at a reasonable speed without busting a gut.

    Jerry
  • 12 Jun 2012 01:38
    Quote
    Reply # 961781 on 961378
    Anonymous member
    Arne Kverneland wrote:

                                                                         Stavanger, Monday

    In August 2008 I tried the yuloh idea on my 29’ / 3ton Johanna. I have to say it was not a great success, but I think that if I had made a new blade for it, about 2-3’ longer, it would have been much better. Unfortunately I lost interest, partly because that Yamaha back there, never fails. The makeshift pivot is worth mentioning as it was the best thing with the whole yuloh: The yuloh is simply hanging right under the pushpit. Have a look here and then step yourself through the 3 next photos.

    Arne

    Arne,
    Your pivot point on the pushpit makes sense to me. The illustrations of passenger carrying sampans show a built up structure on the stern for the yuloh pivot.
     My attempt at a yuloh on my 9ft dinghy didn't work very well either, because it immediately became clear that the pivot needed to be much higher above the waterline than the top of the transom. I, too, lost interest.
    And my oars never fail, and are more powerful than a yuloh - just like your Yamaha.
  • 11 Jun 2012 23:50
    Quote
    Reply # 961680 on 958948
    Anonymous member

    Karlis wrote,

    Might be worth thinking about a JRA publication all about yuloh traditions, design, construction tips and technique.  It seems yulohs always end up being a footnote to junk rigs or western sculling, they could use a more in-depth treatment.

     

    Hi Karlis,

    That’s why I wrote the original article with the recipes on the yuloh. Bob and some others I know had been using them and when I enquired I heard that they were finding them to be quite hard work to use, so I tried to analyse the problems. Nearly everyone I sent the article to made some changes and found they could get better results. Like an update of PJR, a chapter on the yuloh should be popular.

    Cheers

    Slieve

    Last modified: 11 Jun 2012 23:51 | Anonymous member
  • 11 Jun 2012 23:44
    Quote
    Reply # 961671 on 958948
    Anonymous member
    See if you can watch this video clip of a Japanese Ro in action (on a replica of a 17th century Japanese fishing boat, at the Hobart wooden boat show). Note the handle on the top, which seems wrong (it should be underneath) but gives control over the angle of attack.
    Also, a photo of the pivot area. The pin goes into a crudely cut, shallow depression in the Ro, and a scoop of water is thrown over it occasionally. I got it to stay on, when I tried - mainly, I think, because of the weight of the Ro. 
  • 11 Jun 2012 22:20
    Quote
    Reply # 961569 on 958948
    Anonymous member
    Arne, you've come through again.  

    I'm just finishing off my 14' yuloh for my 24' boat, using primarily Bob Groves "Easy Go Yuloh" layout recipe with Slieve's well illustrated article for inspiration.  I was at a bit of a pause trying to figure out the best way to mount the pivot pin so the yuloh can work around the outboard. 

    The hanging pivot I think is the perfect answer! I'll give it a try, I have the same stern/engine configuration as Johanna.  If it doesn't work, no problem, no bolts or glue on the boat required.  

    Might be worth thinking about a JRA publication all about yuloh traditions, design, construction tips and technique.  It seems yulohs always end up being a footnote to junk rigs or western sculling, they could use a more in-depth treatment.
  • 11 Jun 2012 22:19
    Quote
    Reply # 961568 on 958948
    Deleted user
    Thanks for the info regarding the hanging pivot!  Don't see how it works without having something to work against.....but it sounds like it did!
  • 11 Jun 2012 19:29
    Quote
    Reply # 961378 on 958948
    Anonymous member (Administrator)

                                                                         Stavanger, Monday

    In August 2008 I tried the yuloh idea on my 29’ / 3ton Johanna. I have to say it was not a great success, but I think that if I had made a new blade for it, about 2-3’ longer, it would have been much better. Unfortunately I lost interest, partly because that Yamaha back there, never fails. The makeshift pivot is worth mentioning as it was the best thing with the whole yuloh: The yuloh is simply hanging right under the pushpit. Have a look here and then step yourself through the 3 next photos.

    Arne

    Last modified: 11 Jun 2012 20:11 | Anonymous member (Administrator)
  • 11 Jun 2012 18:44
    Quote
    Reply # 961308 on 958948
    Deleted user
    Thanks for the info, Bob.  The hole I originally drilled in a piece of hardwood fastened to the underside was not that deep.  That could be why the oar would not stay in place when not in use.  I'm still in testing.
    Neil
  • 11 Jun 2012 18:20
    Quote
    Reply # 961290 on 958948
    Deleted user
    I drilled the hole about 1 1/4 inch deep and used a chisel to rough in the cone shape. I don't lash it on in any way and it does not jump off the pin. Lashed to the deck at the handle seems to keep it in place. If I'm going to anchor I'll put a couple of hitches around the handle to put some weight on it.
    Last modified: 13 Jun 2012 18:05 | Deleted user
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