Great process for neat result. I am currently only laminating under vacuum, but never tried infusing. Does it need lots of knowledge to not have bubble inside the lamination ?
I never made a board prior to this one, have never worked with epoxy or polyester. The “little” knowledge I have comes from boardbuilding forums and watching tutorials on RUclips. I just tried to reproduce what I saw in the movies and used my common sense. You have already more experience than me, so trying infusion should not be a problem for you. I think it’s just very important to use the appropriate materials and to apply them in the correct way.
You only get bubbles if you have a leak or your feed line falls out of the bucket 😆 When you do an infusion, the vacuum leak down check should ve near 0. When I've done large parts, like a wing skin or fuselage, we liked to come in the next day or after the weekend and find the part still perfectly under vacuum. Its all preparation as the infusion itself is over really quickly. If your already doing vacuum bagging, your close to doing an infusion. Just be ready to learn from your mistakes. 😅
Looks pretty good! Why not infuse it all at once? Would be faster and less waste. If you're resin is moving to fast you generally would add a resin break by cutting back the flow media. Especially toward the vacuum lines. Avoiding race tracking can also another issue. I didn't see your previous videos, but what was the weight of the materials? Infusion can make good parts, pretty compareable to prepregs if done well. A cored part like yours also should be about as easy to do in one infusion. When do you clamp off resin intake? I generally would weigh the amount needed to get to my desired fiber ratio and add some for lines and flow media to avoid oversaturation. In reality carbon is so amazing mosy parts are probably over designed. A part like yours isnt really going to benefit from being super light? My buddy made some hollow long boards that were insanely light, helpful for carrying it to the water. Id imagine they were also super rigid. Im no surfer so i have no idea what properties are good for surfing. Anyways, looks good man! Nice work!
Hi Samuela, Thanks for your advice. As it is my first board I and also the first time I try infusion I have still a lot to learn, my next board I will infuse at once. Know I have some experience and will try to improve my technique and make some small changes on the shape. Weight and rigidity on a Dockstart board is important. Now my board weighs 2,5kg, it’s also rock solid (too solid), I’m convinced I can get my next board below 2kg.
@@yannickver is weight an issue? What core are you using? The core soaking resin will add weight potentially. What is your ply schedule? Ply orientation will obviously have a large effect on rigidity. Also the type of fibers you use. The great thing is that you can tune the stiffness. Its also best to keep your laminate symmetric. Composites are a bit if engineering and a bit of magic. 😆 Even after building airplanes for a long time, im always learning and improving my knowledge and techniques. Im probably preaching to the choir, but always glad to share anything ive learned. Keep it up! 🙏
@samuela6271 Weight is an issue because you want a reactive board, the center of gravity of the board should also be as close as possible towards your foil mast so you don’t want to have weight in the nose of the board.
@samuela6271 As core material I used a closed cell PVC foam (75 kg/m³) (Easycell75 from Easycomposites). My ply schedule is explained in my first movie (timing: 40sec). At the boxes I have 2 layers of 300g 45° biaxial CF and on top of this I put a layer of 200g 2x2 twill an a layer of 210g plain weave (top an bottop have the same schedule). All carbon fiber is 3k material. The board feels rock solid, probably too solid.
@@yannickver sounds like a good set-up, maybe too much considering what people do with regular layup on boards is e-glass plain weave. Carbon is considerably higher modulus. You could also add stiffeners by cutting the core and wrapping strips in an I beam like stringer as well as on the edges and then you could reduce the number if full plys. Would make a more rigid structure when you have fibers that are out of plane with the board surface. A bit more work and could require some more setup. But the nice thing with composites is you can tune and tailor to meet your requirements. There is also unidirectional which is even higher modulus, thinner, and lighter. I work in aerospace so weight reduction is important to an extreme. Might be overkill. But sounds like you enjoy a challenge!? 😆 Looking forward to your progress.
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Great process for neat result. I am currently only laminating under vacuum, but never tried infusing. Does it need lots of knowledge to not have bubble inside the lamination ?
I never made a board prior to this one, have never worked with epoxy or polyester. The “little” knowledge I have comes from boardbuilding forums and watching tutorials on RUclips.
I just tried to reproduce what I saw in the movies and used my common sense. You have already more experience than me, so trying infusion should not be a problem for you.
I think it’s just very important to use the appropriate materials and to apply them in the correct way.
You only get bubbles if you have a leak or your feed line falls out of the bucket 😆
When you do an infusion, the vacuum leak down check should ve near 0. When I've done large parts, like a wing skin or fuselage, we liked to come in the next day or after the weekend and find the part still perfectly under vacuum.
Its all preparation as the infusion itself is over really quickly.
If your already doing vacuum bagging, your close to doing an infusion.
Just be ready to learn from your mistakes. 😅
Looks pretty good!
Why not infuse it all at once? Would be faster and less waste. If you're resin is moving to fast you generally would add a resin break by cutting back the flow media. Especially toward the vacuum lines. Avoiding race tracking can also another issue.
I didn't see your previous videos, but what was the weight of the materials? Infusion can make good parts, pretty compareable to prepregs if done well. A cored part like yours also should be about as easy to do in one infusion.
When do you clamp off resin intake? I generally would weigh the amount needed to get to my desired fiber ratio and add some for lines and flow media to avoid oversaturation. In reality carbon is so amazing mosy parts are probably over designed. A part like yours isnt really going to benefit from being super light? My buddy made some hollow long boards that were insanely light, helpful for carrying it to the water. Id imagine they were also super rigid. Im no surfer so i have no idea what properties are good for surfing.
Anyways, looks good man! Nice work!
Hi Samuela,
Thanks for your advice. As it is my first board I and also the first time I try infusion I have still a lot to learn, my next board I will infuse at once. Know I have some experience and will try to improve my technique and make some small changes on the shape. Weight and rigidity on a Dockstart board is important. Now my board weighs 2,5kg, it’s also rock solid (too solid), I’m convinced I can get my next board below 2kg.
@@yannickver is weight an issue? What core are you using? The core soaking resin will add weight potentially. What is your ply schedule? Ply orientation will obviously have a large effect on rigidity. Also the type of fibers you use. The great thing is that you can tune the stiffness. Its also best to keep your laminate symmetric.
Composites are a bit if engineering and a bit of magic. 😆
Even after building airplanes for a long time, im always learning and improving my knowledge and techniques.
Im probably preaching to the choir, but always glad to share anything ive learned.
Keep it up! 🙏
@samuela6271 Weight is an issue because you want a reactive board, the center of gravity of the board should also be as close as possible towards your foil mast so you don’t want to have weight in the nose of the board.
@samuela6271
As core material I used a closed cell PVC foam (75 kg/m³) (Easycell75 from Easycomposites).
My ply schedule is explained in my first movie (timing: 40sec). At the boxes I have 2 layers of 300g 45° biaxial CF and on top of this I put a layer of 200g 2x2 twill an a layer of 210g plain weave (top an bottop have the same schedule).
All carbon fiber is 3k material.
The board feels rock solid, probably too solid.
@@yannickver sounds like a good set-up, maybe too much considering what people do with regular layup on boards is e-glass plain weave. Carbon is considerably higher modulus. You could also add stiffeners by cutting the core and wrapping strips in an I beam like stringer as well as on the edges and then you could reduce the number if full plys. Would make a more rigid structure when you have fibers that are out of plane with the board surface. A bit more work and could require some more setup. But the nice thing with composites is you can tune and tailor to meet your requirements. There is also unidirectional which is even higher modulus, thinner, and lighter.
I work in aerospace so weight reduction is important to an extreme. Might be overkill. But sounds like you enjoy a challenge!? 😆
Looking forward to your progress.