Bina bot sendiri

Saya dah lama dok perati dunia bot ni, terutamanya di US. Satu keistimewaan penduduk US ni adalah cukup berani me-reka(design) dan mencuba. Dan ini bukan hanya tertakluk kepada golongan engineer atau yg semakhluk dengannya, tetapi kepada semua, mahupun posmen, toke kedai, tukang kayu dsb.

Kalau boleh, kita ambik budaya macam ni. Yang elok ambik, yang tak elok tinggalkan. Apa yang menjadi tumpuan kita sebagai pemancing pastilah sesuatu yang berkenaan dengan dunia ni, dalam kata lain, BOT.

Kalau ada yang selalu web-surfing tentang bot, pasti banyak kali terjumpa cerita bot yang dibina sendiri oleh orang2 biasa sahaja, termasuklah ocean cruiser yang besar. Tak perlu la kita cerita pasal bot2 besar ni, cukup la kita cerita pasal “basic boat” sahaja. Di US, budak2 12 tahun pun sering bina bot kecil ni, percaya atau tidak?

Plywood Boat

Dengan menggunakan 2-3 keping plywood, fiberglass sheet dan resin, dah boleh buat bot sendiri untuk kegunaan ringan.

Contohnya seperti website nih: http://www.pdracer.com/articles/b-bucket/index.htm

Jadi saya buka topik ni supaya membuka minat para forummer dalam pembinaan bot mini kegunaan sendiri yang pastinya murah dan boleh di-customize mengikut citarasa sendiri. Dan kalau ikut guideline dan common sense, tak buat hentam keromo, pastinya bot itu juga selamat digunakan.

Dalam masa terdekat ni saya pun teringin jugak nak try buat bot dalam 9kaki, flat bottom. Bot jenis ni paling senang dibuat untuk belajar. Masalah sekarang takde supply resin+fiberglass sheet. Jadi, kalau ada forummer yang tahu mana nak cari supplier barang2 ni, bolehlah tolong2 . [:)] [:)]

Kepada sesiapa yg berpengalaman dalam pembinaan bot, juga diminta komen. Terima kasih. [:)]

Bro pulsar13,

Aku sokong hang,kalu boleh hang tunjukkan gambar projrk bot hang tu step by step aku pun minat gak…

quote:
Originally posted by qiaq
Bro pulsar13,

Aku sokong hang,kalu boleh hang tunjukkan gambar projrk bot hang tu step by step aku pun minat gak…


Tima kasih… saya akan pindah ke rumah semi-D dalam dua bulan lagi, ada la ruang sket tepi rumah, insyaAllah lepas pindah buleh start. Sekarang takde tempat langsung (alasan?) [:D]…

Tapi soalannya sekarang, ada tak sapa2 kat sini yang tahu kedai yang supply fiber sheet / epoxy? Area belah penang atau KL, boleh belaka. Kalau tau, tolong2 la reply. [:)]

try to insert picture; (newcomer..saya budak baru belajar..)

this one picture of boat on her launching day..installed with 30HP OBM. quite steady and speedy

this is the picture of the boat naked..still required outfitting

this is the frame..

Perghhh… memang best. Nampak professional tu. Hull cantik, boleh pegi laju nih…

Brader cempiang boleh share tak pengalaman buat bot ni. Terutamanya Bill of Materials dia… dan mana dapat supply. Saya mmg teringin dah nak buat cartopper kecik tapi masih takde material glass-fibre sheet dengan epoxy.

Saya try tengok dalam yahoo group tu takleh masuk, kena ada email invite.

this is quite a big project for me..
and some still under ‘try and error’ techniques..
if you want to go about cartopper, 9ft or so,
flat bottom..its is quite simple..
i’ll show you my other experiment..
or share with u on the design n construction..
maybe

this is another project of mine..

14ft Classic Clinker Boat with plywood construction..

this is the most difficult way of building wooden boat ( i think..)
there are several methods of wooden boat construction..you can browse the internet on the details..
to name;

  • plywood on frame -> like my previous boat where the construction based on framed build. this also called skin-on-frame construction method. this can be classified moderate difficult level.
  • Clinker construction / lapstrake construction -> this method quite difficult. this was implemented by our old man at kampung2 di mana papan2 disusun berturutan dan gala digunakan sebagai glue. bot jenis ni yang saya buat di atas tu..tapi i implemented western technique using copper nails & roves. (sound too technical ya..)
  • Stitch & glue -> yg ni paling senang but required proper lofted plan. plan boleh dapat kt internet free atau beli..
  • ok back to bisnes..

    untuk boat clinker ni..

    1. kena lofting dulu..lines plan / table od offset boleh dapat kt buku atau internet..untuk boat ni saya ambik dari buku Boatbuilding Manual - Robert M Steward - McGrawHill. Lofting kena buat full scale.. contoh lofting

    2. making ‘mould frame’ kalau tengok..frame ni based on drawing lofting tadi..kemudian di susun pada station/ jarak yg betul. Rangka boat seperti stem (alu) keel dan transom dibuat dulu..

    1. kemudian baru masukkan planking..mula dari bawah..dan buat kiri-kanan-kiri-kanan dari bawah sampai atas..make sure kiri n kanan sama untuk nampak cantik..

    pastu baru boleh tambah dia punya ribs..seats..floor..& paddle for rowing etc.

    **sori macam che’gu la plak..and sound too technical kan..susah nk terang ikut BM ni..eniway..buat2 paham la yek..kena buat baru tau..

    chempiang. ko ni cheper ke??kalo yer memeng ko la org yg paling clear tentang wood n plywood nih sebab ko kan lecturer kt unikl..hehehe

    no phone 012-5232673, 013-4617794

    pandai bot je xpandai mancing leceh gak..
    eniway..sape pon cempiang doesnt matter..
    yg penting kita dalam satu kapal…hahaha
    kalau ramai kaki..i intent to organize
    “weekend boat building workshop for non-boatbuilder”
    apa kata?

    hehe, rendah diri lak..ok gak..aku pun student je..tapi stream aluminium la..

    no phone 012-5232673, 013-4617794

    NEW BOATBUILDING PROJECT

    STICTH & TAPE CONSTRUCTION

    • Some called frameless construction
    • quite an easy construction..
    • required:
      • 4 sheets of plywood 6mm
      • cable tie
      • resin + fiberglass tape..CSM will do,
      • fiberglass filler / fume silica (brand: cab-o-sil,aerosil etc)
      • the most important: COMMITMENT!!
    • These are the some steps of the construction process..
    1. marking and cutting..since the plywood come in 8’x4’ size, the plywood require some joining..butt joint will do..and off course scarph joint is better. the following picture shows the 2 bottom planking and on side planking had been cut (satu lagi tengah potong masa tu..) you see that the edge will joint to each other according to the arrangement..

    1. then, stitching process began..drill hole enough for cable tie to insert, each at the same distance..begin with the middle one..followed by each side..

    the pictures of stitched boat..(without frame..but with the transom..)

    the next process is gluing and taping from inside at each joining edge..

    then, when the boat take shape, cable tie can be cut from outside, and fiber the whole boat for better strength.

    next, install inside frame cum seat..(such they installed in fiberglass boat)

    then off you go..15HP will do..this boat had been put on seatrial, but the action wasnt caught on camera..

    US boleh? Malaysia pon BOLEH!!

    eh, shahriltheangler student marine ke?
    mesti penah buat bot aluminium dah kan..

    Malaysia mesti boleh punya!! Hehehe…

    Bot yg senang buat camtu la yang kami cari… stitch and glue pakai cable tie jer. Pastu tape ngan fiberglass tape, epoxy.

    Brader cempiang, boleh bagitau tak supplier fiber tape ngan epoxy? Saya carik tak jumpa la… kalau jumpa tu memang saya dah start buat dah ni.

    am not sure 'bout the material supply..
    but i am using local LUXCHEM brand..
    http://www.luxchem.com.my
    can ask them on their supplier nearest to you.
    epoxy quite expensive..
    i think polyester will do the job..
    save 2/3 of the cost..
    if you are about to use carbon fibre / kevlar..then use epoxy..
    this is just my view..others might seen in different way..

    SOME TIPS ON FIBERGLASS MATERIAL ESTIMATION;

    some fiberglass mats called in their type and weight such as;
    CSM 300
    CSM means Chopped Strand Mat - type of fiberglass
    300 means the weight equal to 300gram per square meters

    WR 450
    WR - woven roving
    450 - grams per meter squared

    so, first and foremost, you have to calculate the total area which will be covered with fiber..

    then the laminating schedule..
    for example;
    1st layer - tissue / CSM 100
    2nd layer - CSM 300
    3rd layer - WR 450
    4th layer - CSM 450

    bare in mind that the ratio..
    Resin to CSM = 1.5 to 1
    Resin to WR = 2 to 1

    so,

    to illustrate, let say you have area of 1 meter squared with 4 layer to laminate;
    Total resin to be used is;
    1st layer = 100 x 1.5 = 150 grams
    2nd layer = 300 x 1.5 = 450 grams
    3rd layer = 450 x 2 = 900 grams
    4th layer = 450 x 1.5 = 675 grams
    Total resin = 2.175 kg

    but, you have to allocate additional 25% of wastage..

    this is just a guidelines..in real application might be different..depends on usage and experience..

    happy fiberglassing..

    quote:
    Originally posted by cempiang
    am not sure 'bout the material supply.. but i am using local LUXCHEM brand.. http://www.luxchem.com.my can ask them on their supplier nearest to you. epoxy quite expensive.. i think polyester will do the job.. save 2/3 of the cost.. if you are about to use carbon fibre / kevlar..then use epoxy.. this is just my view..others might seen in different way..

    I have access tu CSM, but not the fiberglass tape. Can I just use CSM to fill the sides without tape? Maybe reinforce with nails can replace taping?

    Bro Cempiang, my construction idea with my material limitation is like this:

    1. Prep and cut the plywood
    2. Set the hull, glue the joints with wood glue. While curing, keep in place with duct tape.
    3. Add chine, reinforce with nails
    4. Glass the open joints inside and outside with CSM (without fiberglass tape)
    5. Paint, base white, 2nd automotive lacquer

    Need your advise if you think this will work?

    fiberglass tape is har to get in market..otherwise special order..
    but you can just cut the CSM or WR to size of about 4" wide to be a tape.

    i am not sure what kind of boat you intend to build..but…bare in mind..as long as all ‘hole’ covered..watertight..the boat will float (most likely..)

    note:
    *wood glue..some not waterproof
    *common housenail tend to corrode..

    eniway..build first..then improve..good luck

    quote:
    Originally posted by cempiang
    fiberglass tape is har to get in market..otherwise special order.. but you can just cut the CSM or WR to size of about 4" wide to be a tape.

    i am not sure what kind of boat you intend to build..but…bare in mind..as long as all ‘hole’ covered..watertight..the boat will float (most likely..)

    note:
    *wood glue..some not waterproof
    *common housenail tend to corrode..

    eniway..build first..then improve..good luck


    That’s my plan - can learn from mistakes. Right now I’m planning a single sheet boat - using single piece 1/4" thick 4’x8’ plywood. No need to use expensive materials just yet.

    The design would be a small flat bottom skiff. Capacity 1-2 people, 150kg.

    I think I may have misunderstood CSM. What I have is a filler epoxy with chopped fiberglass strand. Cannot cut this one… [:)]

    one sheet skiff (OSS) is a good one for 1st timer..
    as you can get the plan at http://www3.sympatico.ca/herbert.mcleod/skiff.htm

    but, i have tried to built one..
    following exactly the plan given..
    inilah hasilnya..


    my comments on this design..

    1. quite stable.. but the freeboard (jarak antara air dengan dinding) quite short, about 4" for 60kg person like me..

    2. the OSS is quite trim at the bow (terjongket depan) hard to manouvering..

    3. overall..ok..will do for lake use with no wave..for better control..sit at the middle..use 2 oars..

    i have modified some of the design..with increase the side plate height to 10"..and front angle..the result: easy to manouvre but quite rolling..

    so..