Diy sup foil

[supuk]

220 mm ish at the moment

[blackeye]

Since you can now 3D print foil plugs (I assume the printed foils are plugs) how about adding tubercules to the leading edge? I think low speed paddleboard foils are a perfect application for tubercules: Lowish speed, frequent AOA changes, turbulent water. Particulary after seeing the thickness of that Takuma foil.

[supuk]

Quite possably I think the Takuma may be thinner than the go foil would like to find out.

First part off the printer and it looks good, feels pritty solid defiantly up to going in a vac bag.

[SURFFOILS]

Great work !

[Admin]

Wow!  Incredible resolution.  Are you maxed out on part size?

[supuk]

No can still go up in part size layer height was set at .20 it goes down to .05 but it took 17 hours to print that so won't be going any finner if anything the larger layer height may be better for bonding to the epoxy. The two other sections for the left side are printing now, I'm hoping the will be done before I go to France tomorrow for  10days

[Admin]

Cool!  What are the max dimension that printer will put out?  What materials are possible? 

[supuk]

Cool!  What are the max dimension that printer will put out?  What materials are possible?

250mm x 210mm x 200mm it take 1.75 filament and extruder goes up to 300deg so there is a huge number to choose from. im just using pla at the moment but have  abs, a 20% carbon fiber one and a flex filaments here I am still to try

[PonoBill]

Very cool, I'm acquiring some Focus 360 skill so I can do the same. My antique hot printer is probably up to the job--I promised myself I wouldn't buy anything new for this until I give that a go. 300 degrees is hot enough for polycarbonate. If you run into strength problems with this one you could give that a go. I've found poly printed parts to have outstanding strength.

[supuk]

Very cool, I'm acquiring some Focus 360 skill so I can do the same. My antique hot printer is probably up to the job--I promised myself I wouldn't buy anything new for this until I give that a go. 300 degrees is hot enough for polycarbonate. If you run into strength problems with this one you could give that a go. I've found poly printed parts to have outstanding strength.

The fancy filaments are fairly expensive (well maybe 3 time the price but still probably only $30 to print booth wings so not really all that much) they way I am planning for the first one is to  just use it more as a form to bag the carbon so was not worrying about the strength or the print too much, it is however super strong as is the only way I could see it fail is by it splitting on one of the layers. its going to take a bit of experimenting I think if the printer was able to do it in one bit  or the cad was done in a clever way and printing orientations played with a pure 3d printed wing is doable.

You may as well order a printer bill there is a 7 week wait on them so should arrive just as you have convinced yourself.

[supuk]

Few pics from today. Two different spots the one in the harbour can get a bit sketchy and feel quite small as you cover so much ground on the foil and have some fairly solid walls ether side. It was only micro in there today it normally breaks way further out.

Every one likes a good face plant
 

[SURFFOILS]

It almost look likes a massive test tank, what a great place to get a heap of waves to yourself.

[supuk]

Finally finnished printing, there was a bit of warping on the second part probably due to the small contact area so probably need to print with a raft or try a different filament that works better for large parts. There was also a problem with the cad for the wingtip so that needs to be looked at along with thining the wall thickness as it's way over built.

[Admin]

This is exciting.  How heavy is this?  It sure looks like you could eventually modify to do some kind of CAD dovetail slide or similar to connect the sections and then perpendicular carbon dowels.  Print, assemble, ride. 

[PonoBill]

I assume you printed the wingtip vertically, without supports. If so it's surprising that it came out as well as it did. I've always found that unsupported overhangs misprint someplace, usually near the greatest bend. The plastic slumps a little while it's still hot and the next pass is trying to print on air. That came out extremely well for a first try. I hear (from rod Parmenter) that one of the guys here in the Gorge (Peter Lederer at LP foils--https://www.lpfoils.com/ ) is 3d printing wings. I saw him and his wife and kids at the Sand Bar Cafe yesterday. If I had seen this picture before that I would have grilled him for some technique. His 3d wings look like castings. He might be using a service instead of his own printer. The first one I looked at of his looked like 10 microns or maybe some kind of solvent smoothing. Felt kind of heavy. At that time he was showing his foils at a kite event and had a dozen people asking him questions, so I didn't bug him for any answers to the myriad of questions I had. He's got a very sophisticated shop in Bingen, WA, and Bingen is kind of becoming a serious center for composite tech, so who knows what they used.