The curvy shaped Koi: Building a wooden Foil Pumping Board (DIY)
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- Опубликовано: 21 авг 2024
- (English description see below)
Hier möchten wir dir den kleinen Koi vorstellen 🐟.
Die Besonderheiten dieses Boards sind der geschwungene Holzkörper und die Langlöcher, die es ermöglichen, unterschiedliche Mastplatten zu montieren. Und natürlich das Design: wie immer japanische Elemente, dieses Mal der Koi-Fisch mit traditionellen Wellenmuster (Seigaiha).
- Länge: 93 cm, Breite: 32 cm
- Volumen: ca. 7 l
- Gewicht: 3,2 kg
Materialliste:
Balsaholz, Buchenholz, Holzleim, Epoxidharz und -spachtel, Aluminium Ovalrohr, Kohlefaser-Matten 400g/qm, Glasfasermatten 200g/qm, Flechtschlauch Glas 136tex D20, Korkmatte 4mm
Wir wären ganz aus dem Häuschen, wenn du unseren Koi nachbauen würdest 🙃. Falls du dabei (oder natürlich auch sonst) Fragen hast, schreib sie uns einfach in die Kommentare ✏️.
www.neckarfoil...
/ neckarfoil
/ neckarfoil
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Here we would like you to introduce the little Koi 🐟.
The special features of this board are the wooden curved body and the slots which makes it possible to mount different types of mast plates. And of course the design: as always, Japanese elements, this time the Koi fish and the traditional wave patterns (Seigaiha).
- length: 93 cm, width 32cm
- volume: approx. 7 l
- weight: 3,2 kg
Material list:
balsawood, beechwood, glue, epoxy resin and filler, aluminium oval tube, carbon fabric 400g/qm, glass fabric 200g/qm, tubular glass sleeve 136tex D20, cork mat 4mm
We'd be over the moon if you would recreate our Koi 🙃. If you have any questions therefore (or of course any other questions), just write them to us in the comments ✏️.
www.neckarfoil...
/ neckarfoil
/ neckarfoil
Very tidy way of work.. why when I do it all my house get glue and stuff around the project hahaha!!
Great work!
Thanks! What I would give for a decent workshop. I recommend working when the Lady of the house is not at home 😉
@@neckarfoil 🤣🤣🤣
Incredible job! Really inspired me! Can you share the measurements you used in the begging to make the strips curved? Thanks
Unfortunately I can't share the dimensions. I set the bend by feel and it was reproducible due to the always same positioning of the screw clamps. The rise at the nose was 4cm and at the tail 2cm, but I'd keep it a little lower next time. Maybe 3cm/1cm.
Sehr cool! Habe vor zwei Wochen mein erstes "einfaches" Dockstartboard fertig gestellt. Aber Euer Koi ist echt der Hammer. Ich schaue mal ob ich den nachbauen werde? Wenn ja, werde ich das natürlich posten!
Danke für deinen Kommentar. Und wenn es beim Bauen zu Fragen kommt, dann melde dich einfach! 👍
Impressive craft work and you end up relatively light. 👍👍
Do you prefer this one to a pure flat board ?
Thank you for the nice comment!
I wanted to use the slight rocker to prevent the nose from dipping into the water. But considering the little rise of the nose in relation to the length of the board, the effect should not be that big. So may be only an optical feature 🤔.
The first impression on the water was that the foil is going faster. This is understandable, since while pumping with the front foot the nose is now moved further down (if you are used to a flat board!) and the wing accelerates.
But let me do some further rides for a final impression 😃!
@@neckarfoil on my boards I just cut the nose at 45° and it's enough for me. I also made one out of a wakeskate and it had some rocker, probably more than yours and I never managed to get confortable with the non flat deck. It's really interesting that you like it.
Maybe I should try to tune a little my foil angle and see how it feels.
Really nice job. What is the final weight ? Which wood did you use ?
Hello Mickael, thanks for your comment. I put some data and a material list in the video description. Just scroll down for the Englisch text.
Weight is 3,2 kg and used wood is balsa and beech.
how long and wide is it?, good job btw
Thanks a lot! The dimensions are given in the Video description.
Length 93 cm. Width 32 cm.
@@neckarfoil thanks. Before putting the first layer of carbon or fibreglass is it better to leave the wood rough or sand it finely?
@@333cgs333 If you use regular planed wood, no additional sanding of the surface is necessary. The surface should be dry and dust-free.
why not use 1/2 sheet marine grade plywood probably be a lot easier. cut the shape you want glue the two layers together with the same curve paint it with marine varnish and you're done. I made a huge light wind kite board that way worked beautifully and it was quick to build. Didn't need glass or nothing, just three coats of marine paint lol.
You are right with the plywood. Glueing several layers in constrained condition is a simple method to get curved wood constructions. I built a skateboard this way.
But it is difficult to compare kiteboards and skateboards with foilpumping boards.
1. The board needs extra stiffness for the power flow / bending moment from front foot to the mast.
2. The board needs some extra volume to float with the weight of the foil (especially when water soaks into the mast profile).
Our first selfmade board was pure plywood (no glassing and no paint!). The dimensions were similar to this board, but the weight is 4,2kg. Plywood is not really a lightweight material!
Both marine plywood and regular plwood are simply alternating sheets of veneers set opposite at 90° to each subsequent layer and glued together with a waterproof adhesive The main differences between marine and regular plywood is that both sides of the marine plywood are clear with no filled-in knot holes and the interior veneer cores do not have any voids as regular plywood. (Small gaps/holes in the interior veneer layers that may indeed run right across or down the sheet depending on the angle of the veneers.)
Laminating the board by glueing the wood strips with all the grains parallel to each other produces superior stiffness that cannot be achieved by using plywood which is subject to flexing because of the alternating angles of the interior veneers ...voids or no voids.
Great work.
The alimunim inserts are a really interesting idea. What size pipe did you use? Have they held up well over time? Would you recommend this method, or change anything about how they were installed?
The oval tube was really hard to find, but I found it on Ebay. The dimensions are 60x10 mm with a wall thickness of 1.5mm. It holds the loads so far, however, I can say little about corrosion, since I am only pumping in freshwater.
I wanted to find a simple alternative to the fin box tracks.
In the meantime, however, I am convinced that for foil pumping you do not need this possibility of trimming. Instead of moving the mast plate you can move your standing position.
Four holes are the easiest to implement ;)
,👍👍👍👍👍
Hi!
Wo habt ihr denn das Ovalrohr her? Wir bauen jetzt auch Pumpfoil Nummer 3, aber die Idee mit Langlöchern mit Hülse finde ich top!
Grüße aus Bayern
Ich bin bei Ebay fündig geworden. Ovalrohr 60x10x1,2mm. Leider hatte ich nichts mit 1mm Wandstärke finden können, so dass M8 Schrauben durchpassen. Daher M6. Im Grunde ist das mit dem Oval aber auch nur eine optische Sache. Man kann ja schließlich auch auch ein Rechteckprofil verwenden.
Hi Kai, I'd like to build this kind of foil pumping board and I will be graetful if You could answer my questions:
1. What thickness of the wood stripes did You use? And what is the total thickness of Your board?
2. Is the beech wood used only for the appearance purpose, or rather due to the structural parameters?
2. Did You consider to use the paulownia wood instead of the balsa wood?
Hi Jacek, I am very happy that I was able to inspire you with this video.
1. The wood stripes are 10x10mm. This results in a wood core thickness of 20mm. (plus 2mm glassing and 3mm cork decking = 25mm total thickness).
2. Beech wood is significantly more stable than softwood. At least two stiff stringers should be incorporated, which direct the pumping forces over the board length into the mast plate. I would not recommend a pure balsa or foam core.
3. Yes, paulownia is very suitable. In our shop we have the "Eisvogel" pumping board which is made of a paulownia glue wood panel. You can buy the panels in the hardware store, so you do not have to glue them by yourself. And to be honest, a flat board is actually better for pumping than a board with a rocker like the one in this video!
Check out Leo's tutorial of a paulownia foil pumping board:
ruclips.net/video/HW1ou_KBMaE/видео.html
We are working on a new RUclips video about the "Eisvogel" built, so stay tuned ;)
@@neckarfoil thanks a lot Kai! It really pushed me to order the paulownia plank! I just wonder if I should use only the glass fiber or rather at least one layer of carbon. Could You please share your experience, how many layers in total did You put on both sides and what carbon density do You recommend?
@@ja_git0 glass or carbon is a difficult question! If you use paulownia then the glass will give you a view on the nice wood grain because of its transparency. But on the other hand carbon itself has a nice look too! And is more stiffer and has less weight.
On the "Eisvogel" I use very thick fabric. Glass and Carbon 400gsm (12Oz). On top 1x layer carbon and 1x layer glass. On the bottom side 1x layer glass only, but 2x layer carbon around the mast plate position.
Have a look here in our shop:
www.neckarfoil.de/shop/equipment/foil-pumping-board-eisvogel/
Two days ago, we had a Instragram live session talking about foil pumping board building. We put the content as text on our website (in German only, but I am sure that auto-translation will help). Check our website:
www.neckarfoil.de/we-und-our-flow/ask-us-anything/11-10-2022-foil-pumping-board-bau/
hello what is the weight of board thanks
The weight is 3,2 kg. Meanwhile I would prefer paulownia wood as construction material. We have a paulownia foil pumping board in our shop. The weight of this board is 2,8 kg. A DIY video tutorial will be released next week here on RUclips!
So ein kurzes Brett. Das biegt sich doch so schon keinen mm mehr oder. Ist das Carbon nicht übertrieben? Ich habe mein 130cm kitefoil Brett nur 1x mit Glasfaser überzogen und nie das Gefühl dass es nachgibt. Beim Foil front Wing aus Schaumkern + 16 Schichten Glasfaser hatte ich das Problem, dass es gefedert hat und Ich musste eine Lage Carbon aufbringen. Gruß.
Hallo Andreas, ja stimmt, ich denke auch, dass man hier die Menge an Carbon etwas reduzieren kann. Ich habe das nie durchgerechnet und bin eher auf Nummer sicher gegangen.
Grüße vom Neckar
Hi How many kilograms weight board and full with hydrofoil? Many Thanks
The weight of the board is 3.2kg.
The Foil in this video is the Gong Allvator XXL with a weight of 5.3kg.
Nice Tnx You Rider and Smart Construction.
Pls make next video about your technic for why learn first step ,how jump to bord what the first feet how hold balance
Many Thanks
@@sportactive1 yes, good idea. We will work on this 👍😊
Price in usd?
Thanks for your interest, but the board is not for sale.