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Help needed, opinions welcome! High Aspect Junk Sail...

  • 23 Mar 2026 20:23
    Quote
    Reply # 13612703 on 13586176
    Anonymous member

     The Panel Analyzer, from Balkan Shipyards.

    A long road of trial and error has finally maybe come to an end... Then again you never Know....

    The Video below, shows the Analyzer in action...

    Keep Junking 

    Balkan Shipyards

    https://youtu.be/FAaHAGgIo0I?si=vdqjmRtbXvwFO-Vf
  • 23 Mar 2026 20:15
    Quote
    Reply # 13612698 on 13605318
    Anonymous member
    Anonymous wrote:Ha! I see you have a practically professional "wind tunnel" ;).

    My "wind tunnel" is the "nozzle system" between the buildings near the garage. I have to wait until Sunday, it's supposed to be windy this afternoon. (This panel is just for testing, made from scraps.)

    keep junking, Aloha !

    Hey Jan, Sorry for the late reply...

    Great comment, yes! a high tech wind tunnel it is.... But your is better, yours is free and it will always work! Mine? depends on energy that is getting more and more expensive...

    I will have to invest in in a "Green" Tunnel like yours... Nice camber in your SJR, Beautiful panel, looks like you know what you are doing, unlike me....

    Keep Junking man

    The Force is with U
  • 05 Mar 2026 19:44
    Quote
    Reply # 13605318 on 13586176
    Anonymous member
    Ha! I see you have a practically professional "wind tunnel" ;).

    My "wind tunnel" is the "nozzle system" between the buildings near the garage. I have to wait until Sunday, it's supposed to be windy this afternoon. (This panel is just for testing, made from scraps.)

    keep junking, Aloha !

    2 files
    Last modified: 07 Mar 2026 20:37 | Anonymous member
  • 05 Mar 2026 06:15
    Quote
    Reply # 13605088 on 13586176
    Anonymous member

    Images below show my latest model, still place for improvements...

    Top panels are hard polyester sail cloth 160 gsm. I like this for the top panels because I hope the hard cloth, will hold a better and flatter shape, vs stretchy material that tends to cup at the leech... Also harder and stronger panels at the top for storm sails. I wouldn't use hard cloth at the bottom since reefing will be a problem, but these are top panels triangle shaped, so very little material is squashed between mast and front lazy jack, so I think 'Bermuda' sail cloth could work well....

    Panel number 3 has good shape, here it doesn't show, since the hard Dacron of panel number 2 is twisting the batten slightly deforming the top camber of panel 3... If I slightly turn that batten the panel looks perfect like number 4 does.

    Number 5 at the bottom is the longest, the deepest and the ugliest... 

    Keep Junking

    Balkan Shipyards 

    4 files
  • 03 Mar 2026 19:41
    Quote
    Reply # 13604456 on 13586176
    Anonymous member

    Thanks Jan, yes Now looking at the photos I can see what you're talking about...

    Tomorrow I will look at it again!!! I didn't notice it, but now looking at the photos I understand what you saw.

    It could be because of the different materials... Below are photos of older panels made with a little heavier material, 160 gsm, these green panels look great. But these new white ones are 100 gsm, and I agree with you. 

    By the way, our lake barely freezes anymore.... I'm sure the planet is warming up, winters are becoming very mild in the Balkans....

    Keep Junking 

    Junk Rigger


    2 files
    Last modified: 03 Mar 2026 19:43 | Anonymous member
  • 03 Mar 2026 14:55
    Quote
    Reply # 13604338 on 13586176
    Anonymous member

    Hi Rael!

    The sail looks great!  I wonder if it could be flatter closer to the leech?

    When will you be testing it? "My" lake is still covered in ice.

    1 file
    Last modified: 03 Mar 2026 15:10 | Anonymous member
  • 02 Mar 2026 21:02
    Quote
    Reply # 13604104 on 13586176
    Anonymous member

    Some photos of my model...

    Ratio: 1/5

    8% camber in 3 lower panels, going down to 4% in panel number 2, and down to 2% in top panel.

    This "side dart system" almost looks like shelf foot, I like how the 3 small darts shape the panel and show nice camber. The image below of the 3 panels hanging there inflated without a drop of wind is cool....

    Keep Junking, Balkan Shipyards



    3 files
    Last modified: 02 Mar 2026 21:08 | Anonymous member
  • 15 Feb 2026 20:27
    Quote
    Reply # 13598516 on 13586176
    Anonymous member

    Shelf foot, the dart system... 1 piece of material and 6 darts. The panel takes a couple minutes to sew... No tape, no connecting, no long stitching. Just 6 simple darts folded and stitched, not even cut. On the full size panel, the darts will also get stitched laying down to the shelf, adding even more strength.

    Dozens of cardboard models were made until I found the geometry... No computer was used

    Below, a fanned panel from my sail made to scale. The done panel shows 8% camber with no wind, it's just hanging and looking pretty good. Balkan Style...

    Keep Junking, 

    Balkan Shipyards


    3 files
  • 18 Jan 2026 13:26
    Quote
    Reply # 13586526 on 13586176
    Anonymous member

    Let me thank some JRA great minds that, have been in touch via email and helped lite up, the dark tunnel of Black Magic Junk Rigging...

    You are all added to Balkan Shipyards' hall of Fame.

    So, I will do it, what the heck... Free style shelf foot! Balkan Style... The straight dart, Mulcahy system has been fused with shelf foot, meaning, this panel's shape is three straight lines: entry, max camber, then exit back to zero. Below are images of a cardboard model I built in a few hours... This one worked out to be, only 5 percent of camber, next one will be 8%. I suppose I will have to make 5 full size cardboard models. 1 for each panel, these will be used to find the exact shapes of cloth, that are needed for each panel.

    But I'm stuck on an island without a computer... All I have is the best cloth and the best sewing machines... I may use 4 types of cloth, I wonder if I could go lite on the shelves vs heavier for the panels themselves.... That too will get tested... 

    No computer is allowed on this job! Gonna do it the way it was done in China thousands of years ago.....

    Keep Junking 

    Balkan Shipyards.

    7 files
    Last modified: 18 Jan 2026 20:59 | Anonymous member
  • 16 Jan 2026 19:03
    Quote
    Message # 13586176
    Anonymous member

    A BSY/JRA Project of mind Power... How about it???

    Since I consider myself a fearful Junk Rigger... Just messed up too many times!

    So, gonna go shelf foot, may the Force be with us....

    Anyway, Video and Photo below show the full design.

    The Photo is a mess... Ideas, Questions and dimensions all in 1 image below. the Video explains the basic design, then a short experience why Junks are great! Again getting me out of trouble...


    QUESTIONS: 

    How about 3 types of Cloth? How heavy?? What's easy to find in Europe??? Total Sail Area 18 Square Meters.

    How about bottom panel being the most narrow, since it's the longest... Then, rising up, as they get shorter... They get wider? That way panels are roughly all the same size, but that makes them harder to design and make, since each panel becomes individual....

    So what do you think? your thoughts are very welcome.

    Thank you.

    Keep Junking

    BSY



    https://youtu.be/7tySAEhcyCk?si=CLNaZk1vf1-dBdnx

    1 file
    Last modified: 16 Jan 2026 22:00 | Anonymous member
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