BB a Compac 19 conversion

  • 14 Jul 2016 21:58
    Reply # 4133068 on 4132432
    Phil Brown wrote:

    Arne,

     I used the barrel method following your Making the Sail chapter and used amateur method b for the pockets.  The Edmond Dantes sail making description was valuable as well. The information in in your public domain files helped so very much through the whole conversion. The pictures showing details were especially appreciated.
    You never said a truer word, Phil.  Quite honestly, I think that Arne's straightforward approach, step-by-step explanations and methods that completely inexperienced people can repeat, has probably done as much, if not more, to get people converting boats to junk rig than PJR.  Without Arne and his ideas and, most of all, his willingness to share, there would be far fewer junks sailing around. 
  • 14 Jul 2016 21:51
    Reply # 4133065 on 4129230
    Phil


    The sooner the better, just so as you don't put it to one side and forget about it!  But the we are always looking for good, interesting articles for the magazine.  We have a number of regular and reliable contributers, but would be so happy to see more members taking part more actively.  I think people tend not to realise that their own stories and experiences are unique and likely to be interesting to others: we tend to take for granted the things we do ourselves.

    Magazine 72 is due out in October, and the deadline is mid August, so if you could have something written for then, that would be great.  But after 72 there is 73 and then 74 and then ... so don't rush it, if you feel you would like more time to 'research'!  And please send some nice photos, about 2.5 MB is perfect.   I look forward to it!

  • 14 Jul 2016 15:26
    Reply # 4132456 on 4129230
    Deleted user

    Annie,

    I feel pleased to be asked and think that I would like to.  I would need to get in more sailing with the new sail to give a more complete description. (Oh man, got to go out and do more research today.) What would a time line be?


    Last modified: 14 Jul 2016 15:27 | Deleted user
  • 14 Jul 2016 15:09
    Reply # 4132432 on 4129230
    Deleted user

    Arne,

     I did shorten spans a bit, few inches over 2 x Panel width. The sheeting pluses and minuses in PJR have real context now. That got the sail centered but not snug so I still need to secure the bundle with a rope. Will change that to webbing and add back to the spans.

    Thank you for your comments. I used the barrel method following your Making the Sail chapter and used amateur method b for the pockets.  The Edmond Dantes sail making description was valuable as well. The information in in your public domain files helped so very much through the whole conversion. The pictures showing details were especially appreciated.

    I spent 25 years as a school counselor. Before that I'd done some building and had a variety of other occupations. Sewing was totally new.  I bought an old, don't make 'm like they used to, sewing machine at a thrift store and got started. My wife showed me the basics and came to my aid when needed. Making the sail for the 16 was a good learning experience. I had a great space to lay out, a large plywood attic floor where I could snap chalk lines and used nails and tacks.

  • 14 Jul 2016 09:48
    Reply # 4132144 on 4129230
    Anonymous member (Administrator)

    Phil,

    I had a look at your photo albums. On one of the photos you comment that the sheetspans are too long to let you sheet the reefed bundle to the centreline. I admit that the Johanna-style sheeting needs quite some space. My priority with that sheeting is to get a moderate twist, even with a reefed sail. As long as I can sheet the deeply reefed sail in for fully close-hauled sailing, I don’t worry. I secure the fully furled bundle in other ways. I suggest you do the same. Ocean travellers may have stronger need for sheeting the bundle fully in, but for them I would rather suggest that the sheet is divided into an upper and a lower part.

    If you pinch the sheetlets very short you may get problems with them pulling the battens together so that the leech gets slack and start fluttering. Look at the latest photos of my Ingeborg sailing and you will notice that the lowest span, between the boom and the batten above, is cut too short. I get away without a fluttering leech (just) by keeping the tack line (that with the rubber snubber on it) taut.

    BTW. Your sail looks extremely good  -  no way I could make it better  -  dare I ask what your profession is? Another one; did you just use the barrel method for cutting the panels or did you add any broadseams?

    Cheers, Arne

     

    Last modified: 14 Jul 2016 09:53 | Anonymous member (Administrator)
  • 14 Jul 2016 00:54
    Reply # 4131696 on 4129230
    Phil Brown wrote:

    Now that I see how well the rig works I'll confidently put the old sails up for sale and put some towards a replacement foiled rudder. I couldn't be happier. The boat is preforming better than it did with it's Bermuda rig with a lot less effort. I still have lines left long for adjusting still to cut and finish but summer is short here and I'm not getting any younger. So I'll do that as I go. There are sail, step and partner pictures in my albums on the profile page. None from outside the boat yet.

    (profile boat pic above is still the ODay)




    Yo - what a nice story  The sail looks lovely - well done.  Now, could I ask you please to do a write-up for the magazine.  We don't get a lot on smaller boats, and yet that's the size most people can afford!
  • 13 Jul 2016 22:07
    Reply # 4131545 on 4129230
    Anonymous member (Administrator)

    Phil,
    my experience with HK parrels  matches well with yours. I have found that the higher the aspect ratio of the sail, the lower is the load on (or need for) the HK parrels.

    It is no surprise that these parrels mainly were spotted on Hong Kong junks: Their mainsails were of extreme low-aspect ratio and with just about no sail forward of the mast. These sails were in other words desperately unbalanced, and the upward bend observed in their battens clearly indicates that the HK-parrels were struggling.

    I have often observed on my junks that when the sail is sheeted out for running, then one or more HK parrels go slack. To me it seems that the HK parrels are mainly needed when close-hauled. This is when the sheetlets try their best to haul the battens out of the sail. On Ingeborg I took care to use a quite stout and low-stretch rope for the HK-parrels. That has paid off and I mostly avoid diagonal creases, in one direction or the other.

    Arne

    PS 20230822 I let you have this great photo of Brenda B, which popped up on Facebook today.

     
    (Photo section 8 in my member's album)

    Last modified: 22 Aug 2023 08:44 | Anonymous member (Administrator)
  • 13 Jul 2016 20:17
    Reply # 4131306 on 4129308
    Deleted user
    David Tyler wrote:

    The sail is looking good in those 3rd day's sailing photos, Phil. What's your opinion of the HK parrels? They seem to be slack and non-functional in some of the photos, and it seems to me that the higher the AR, the less necessary they are.


    I wondered that also. The photos with all of HK parrels slack are taken going down wind. They are not slack going to windward. The HK parrel on panel 4 was very slack on all points to start and that was the only one that had big creases but only at times.  That was until I took out the slack.  I just set all of them by guestimate and haven't had to change the others. Maybe there is less required of them with the higher AR and setting them is less critical. I do think the HK parrels are valuable for my sail. Can say so for panel 4 anyway.  I don't know if undoing a lower parrel would show anything as the sail might need to function as a whole?  Maybe they are needed even less with even higher AR's.  Getting the YHP snd THP tweaked right seems more important on BB.
    Last modified: 13 Jul 2016 20:22 | Deleted user
  • 13 Jul 2016 14:46
    Reply # 4129308 on 4129230

    The sail is looking good in those 3rd day's sailing photos, Phil. What's your opinion of the HK parrels? They seem to be slack and non-functional in some of the photos, and it seems to me that the higher the AR, the less necessary they are.

  • 13 Jul 2016 13:42
    Message # 4129230
    Deleted user

    Brenda B (BB) is a Compac 19, L 19ft, B 7ft, disp empty 2000 lbs, draws 2ft. Mast is hybrid, 23.5 ft above deck with a 4 ½ in x 1/8 in. 6061t6 lower section. The top 3.5 ft is slightly tapered made from a solid spruce pole. It's stepped on a plywood base. The partners are also plywood under the old hatch and bolted through the deck, both taken from Arne's work as is the sail design. The boat's CLR is more forward. Short bowsprits were added to later models. The mast on BB is pretty far forward (which leaves barely enough room on deck for line tending). I needed a higher AR, 2.10, which does seem to make it easier to get it to set well. So far I am pleased with the boats balance after playing with the sail's balance, first too much then too little. With 6 panels BB held course going to windward with the tiller tied in maybe 10-12 knots. Helm was good on the run back to the harbor but with less wind. We'll see on reaches in higher wind. The rudder is deep but is only a flat plate. The higher AR sail should help some with that. Now that I see how well the rig works I'll confidently put the old sails up for sale and put some towards a replacement foiled rudder. I couldn't be happier. The boat is preforming better than it did with it's Bermuda rig with a lot less effort. I still have lines left long for adjusting still to cut and finish but summer is short here and I'm not getting any younger. So I'll do that as I go. There are sail, step and partner pictures in my albums on the profile page. None from outside the boat yet.

    (profile boat pic above is still the ODay)




    Last modified: 13 Jul 2016 13:57 | Deleted user
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