video link to documentary film on building a new junk

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  • 22 Sep 2014 15:11
    Reply # 3105632 on 3089917
    Deleted user

    Been trying to decipher some of the Chinese characters on and about this drawing - 'Floating Child' or 'Drifting Child'? Seems to be a gill net fishing junk from the Haizhou Bay area of Shantung Province, north of Shanghai. Used in driftnet fishing in Bohai Bay for part of year, and otherwise used for transportation.

    Google translate from lines plan and forum post about it, and some liberal interpretation - don't quote me!

    Last modified: 22 Sep 2014 15:13 | Deleted user
  • 07 Sep 2014 22:12
    Reply # 3094394 on 3089917
    Deleted user

    Yes, I was comparing it to one I've been working on/playing with - and added some ideas from it. I've also uploaded the lines to technical illustrations. This started off taking lines from an 18' Pelican. Scaled it to 30'. Bit of input from various sources, including JdP, and the lines you uploaded.

    Still a work in progress, and given my skills I wouldn't recommend anyone build it!

  • 07 Sep 2014 20:17
    Reply # 3094358 on 3091355
    Chris Gallienne wrote:

    Nice - they clearly had some traditional designs in it, as these modellers have discovered.

    Only copy I can find is selling on Abebooks for £365.88 - bit steep for me!

    I like the set of lines on that forum, Chris. I've saved the image, and put it into the Technical Forum illustration photogallery, for the time being.

    Anyone in the market for plans for a small junk to build might do worse than to take this image to a naval architect, and ask for it to be traced and scaled to a suitable size.

  • 07 Sep 2014 19:48
    Reply # 3094351 on 3092228
    Peter Scandling wrote:

    Chris

    I've found a copy here in China.  300rmb about £30.  Perhaps it would make a good addition to the JRA library??

    Peter

    Yes, indeed it would. A strong candidate for scanning and making available in PDF format, I think.
  • 07 Sep 2014 15:46
    Reply # 3094272 on 3089917

    Arne & Chris, I once asked a junk builder why don't they use stainless steel nowadays to replace the iron nail components. His reply is that stainless steel components don't have the friction of rusted iron inside the timber. When nail rust inside the timber the two are bonded strongly together. However, I have seen stainless bolts and nuts in modern Chinese wooden craft.

    Regarding the 2 main persons in the film, the younger is a staff of the fishing department who execute government's order to build. The 80 year old man is the shipwright (master builder) who lead the building team to complete the construction.

    John

  • 07 Sep 2014 02:10
    Reply # 3094135 on 3092228
    Peter Scandling wrote:

    Chris

    I've found a copy here in China.  300rmb about £30.  Perhaps it would make a good addition to the JRA library??

    Peter


    Hi Peter, if Chris does not take you up, I'd like to buy the copy you found.
  • 06 Sep 2014 12:33
    Reply # 3093874 on 3089917
    Deleted user

    Arne

    Interesting analysis - I wondered about corrosion as well, but I'm guessing that if they were smeared with and sealed by 'chunam' the lime would protect them in the same way that portland cement protects iron ballast embedded in concrete - both alkaline.

    I wondered about 'who's who' as well. First guess was father and son, but probably not - perhaps John can enlighten us. Whatever, they both communicate a love and enthusiasm for the process without any need to understand their verbal communication.

  • 06 Sep 2014 09:18
    Reply # 3093865 on 3089917
    Anonymous member (Administrator)

    I took some save-screens from that TV-program and uploaded seven of to my Album 3. Just start here and step forward. The first photo shows a very interesting hull shape. They started the building by assembling the central bottom section (flat at first) with drift bolts and clamps. Then they bent it upwards with weights and supports to give it a gentle rocker, and then the bulkheads (5?) and frames were fitted. Then the side planks came on (full length, sawn out of the logs on site). The bottom at the ends were planked athwartships, the sideplanks being tied gently together to fit. This building method let one use massive planks without having to torture them into shape, much unlike western boat building. The thickness of the planks let one edge-nail them with nails made from about 12mm rod, heated in a forge on site and hammered to shape on a special anvil.  Also note the clamps. Even the sail and the blocks seemed to be made on site, just as the masts and yards and the rudder  - and they made themselves good lunches as well!

    These hulls seems to be very slippy, The program showed a motor version passing by. It went fast and with hardly a ripple behind it. This is what impresses me most: On every film clip I watch where Chinese junks (all of them with pram shape) sails along, they seem so fast and manoeuvrable. I suggest you re-read the article in JRA-Magazine 41, a re-print of a Wooden Boat article.

    Cheers, Arne

     

    Last modified: 07 Sep 2014 13:32 | Anonymous member (Administrator)
  • 06 Sep 2014 05:11
    Reply # 3093814 on 3089917
    Roy, Your reformatting give a professional look. Well done! John
  • 05 Sep 2014 19:29
    Reply # 3093595 on 3089917
    Anonymous

    John, thanks for the narrative.  I hope you don't mind my reformatting your text to make it a bit easier to read.

    Roy.

     

    NARRATIVE of THE DOCUMENTARY FILM

    The junk was built at Bei Tong a fishing village near Tianjin to demonstrate fishing culture and the craftsmanship of junk building to tourists. The government invested to build a junk which had extinct in the area for many
    years since 70’s. The project has to be completed before the tourist season in May.

    The name of the junk is Men Ding Zhi 门定子because the shape of the boat resemble Chinese silver ingot (ding zhi=ingot). As there was no drawing for construction, the performance and quality of the junk rely totally on the experience and craftsmanship of the shipwright. They invited a 80 year old
    Mr Zhao as the shipwright. They didn’t use drawing because no 2 boats are
    alike. The size of the boat depended on the amount of timber supplied by the client. A good builder will build the largest boat within the constrain of timber material. Mr Zhao had built 40-50 boats since the 50’s. His assistants are over 60 now. There are 3 major steps:
    1. hull construction,
    2.grouting,
    3.rigging.

    Mendingzhi have very low center of gravity therefore very safe. She is most suitable for shallow mud flat water in the region. The day of laying the keel is considered the birthday of the boat. The boat is like a family member. They lit firecracker and ate noodle to pray for longevity.

    The boat is 12.6m LOA, 4.4m width with 7 watertight compartments namely:
    1.bow
    蒙头舱(ropes)
    2.water
    水舱
    3.net 网舱
    4.elephant nose象鼻舱(ballast)
    5.horse door
    马门舱(catch)
    6.home
    家舱(cooking)
    7.stern
    bao.

    The 2 lower hull board are 5 cm thick the upper 3 boards gunwale are 8 cm
    thick. New timber with moisture are used for the curved part. The most critical part is to cut out the required plank from timber log respecting the wood grain. This will affect the strength of the plank.

    A god shipwright is judged by
    1.economic use of material
    2.boat stability
    3.boat speed
    4.firmness & durability of the boat.

    Happy Wood (Xi Mu)喜木is the topmost timber at the bow with coins embedded. Installation of Happy Wood signified the completion of the hull. Grouting is called Nian Chuan 艌船. The grout is made of lime, tung oil and
    jute fiber.

    The process include
    1.oiling the wood
    上油
    2.cutting slot 开缝
    3.apply grout 抹灰
    4.position jute 下麻
    5.hammer jute into slot 艌麻
    6.twisting jute 收麻
    7.final trimming jute 铲攒嚼活.

    In addition to waterproofing the gap, the grout actually function in binding the wood fibers together to make the hull more durable. The grouting worker is difficult to find nowadays. The youngest grouting worker is aged over 50. They sang a song to synchronize the hammering at the same time. There are different blunt and sharp chisel tools. FRP was applied to the bottom to increase durability. The main mast is 13m tall. 



     

    Last modified: 05 Sep 2014 19:34 | Anonymous
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