While I would very much love to do a efoil build my knowledge of electronics is limited so I am just a spectator on that side at the moment. I have however been building foils for surfing for the past 2 years almost. I thought I would post this up as I saw the technique on here and had never tried it but it seams to be working well.
im sorry I lost the pics of some of the steps but I will post what I have
First off I 3d printed a full size wing in parts in pla. I suffered a bit with warping on the trailing edge but it was nothing a little bit off epoxy couldn’t sort when I bonded the parts together.
next off I used some packing tape down ether side of the trailing edge to extend it out ( this is important so as it stops the glass sticking together on the trailing edge)
I then wax the entire thing with a release wax, I gave it 5-6 fairly thick coats leaving to dry between and followed with a coat of pva release agent.
Then doing top and bottom separately I laid up 6 layers of 200g cloth with epoxy wrapping around the leading edge and onto the black tape.
After everything was cured with a little trimming of the trailing edge the shell that has now been created can be popped of the 3d print and leave it to be used again.
next up I printed a tube that fits onto my fuz which I wrapped in glass and carbon to give it extra strength and along with a peace of high density foam bonded it in and made sure it was all straight and true.
Then I glassed over the tube and used a cabo mix to bond the trailing edge together.
after that using two part foam I filled the void, I did this in multiple poor’s and with a few vent holes to let any excess out, you do also need to keep a eye on it to make sure it does not distort as the foam expands. !
I’m sorry at the moment I cant share this file but I will see if I can do something in the near future. Its actually taken me the last year to learn how to do the cad for this and be happy with it.
Hello,
Nice job, I want to realize a wing too, because mine is too heavy, it looks a lot like yours, can you put online your files to print in 3 d, thank you in advance
Philippe
sorry unfortunately I cant release the file for this as it may be going to a company to be manufactured. using airfoiltool.com and fusion its not all that hard to draw something relatively quickly, although it did take a year do learn how to do that in the first place! More than happy to help with the any problems with the composite side of things
I have a hour or two free this eve so if anyone would like me to draw up a basic wing and post up a stl let me know some sizes and details on what you want and I will see what I can do.
for those that messaged me I have uploaded a fusion 360 file to my blog here. The file is for a 600mm span and with a 11.7% airfoil. I have not tested this shape but it should provide a good starting point if you are after a larger style wing or just trying to figure how to draw them http://www.greypaddleboards.com/category/blog/
I just did something very similar! I 3d printed the wings out of PLA and then added fiberglass to them. I haven’t had a chance to sand them yet, but they came out very strong. I have an internal aluminum rod that supports the wings as well.
Yes it is. Depending from the wing shape, you can even reduce angle of attack of 1degree or little more near the tip, to help reduce vortex, in case you don’t use elliptical or delta shape.
Hi Charlie, I am based in the UK and have all the knowledge on the electronics and drive unit, but am lazy on the epoxying and fibreglass work side of things. If you interested I’m willing to help out on the electronics if you can help out on the epoxy/fibreglass. I think it would be a good trade
