Found an awesome site with cheap surfboard blanks! It allows you to shape your board in anyway you want then just glass or carbon fibre the board. So much cheaper than spending $500 on a board that your just going to cut up.
I tend to favor : fiberglasssupply.com
i don’t exactly remember why i switched to them… i think it was a wider choice of resins and vacuum material.
But in any case… building your own board is always a great idea ! so rewarding.
… and less difficult that it looks… potentially messy though…
first video below is a long board i made and second is a complete foil (the board making is the second half of the video…
I’m planning on building a hollow core wood board, but still finalizing the plans for the shape. Does anyone have any input on size/volume for a good efoil board? The hollow design will make fitting batteries and controls within the deck easy.
We measured the drag of three different boards at different speeds in order to find out which type and length of board requires which energy. Here is the result:
And here is a video, which shows how the measurement was done. We used an mechanical and electrical scale and also measured the time between two points giving the speed. The operator for the pulling-cable speed entered a constant speed over the entire measurement track.
Video showing measurement
The wave board was a Slingshot wave board for kite-boarding. The second board was an old surfboard. The SUP was an inflatable SUP, which is shown in the video.
Direct drive outrunner with direct water cooling
Eboard - Efoil swappable
Request for a patient help
Attach pinion to motor shaft
So what rough size would you recommend?
I’ve been looking at the various options for boards & the general problem seems to be the depth of board required to house the electronics + battery packs. Short of @MaxMaker 's mammoth effort of cncing his own version the general approach to date looks like frankensteining either a SUP or windsurfing board.
getting a board that is short, wide & >3inches deep is a problem
But then I found a surfboard blank design tool called Shape3D that seems to be commonly used world wide. Better yet… the Lite version is free https://www.shape3d.com/
They say they have 200+ cutting centres around the world https://www.shape3d.com/CNC%20SCAN/CncScanTheShape3dUser.aspx
So I downloaded the program & built a version which I’ve sent off to the closest cutting center for a quote.
In the spirit of @pacificmeister here’s the S3DX (shape3d) file for my design.
How to view/use:
- download Shape3D from https://www.shape3d.com/
- download my design & save to your local machine
- open the file in Shape3D
- the lite version wont allow for the cavity creation. but I want to play with that based on a watertight hatch anyway.
- ignore the fins in the plan view. the lite version would not let me remove them.
Will advise on the cost of the blank to see if it is worthwhile.
Turns out that most of the machines they use to cut the blanks have a max width of 26” wide and 4 ¾’ thick.
I’ll post an updated file when I get confirmation it can be printed + a cost
Hey FlyingChris, how wide was that SUP board for testing, and how wide was the old surfboard? Can you rectal?
I recut the design to 5"5’ by 25.5’wide and 4.7’ thick (for the metrics amongst us: 165cm x 65cm x 12cm).
updated design is here: https://drive.google.com/file/d/1wVd8FM4kt7Wkrg6jkClY7ryIobQ42gX0/view?usp=sharing
Individual blanks are about AUD$180 depending on the provider.
Note that a significant amount of work would still be requried as this would just be a foam blank so the whole thing will still need to be glassed/laminated.
Mind you … given the length of time the custom guys were taking to get back to me … I got tired of wating and found a SUP for sale in the local classifieds that was almost totally delminated for AUD$50. After cutting the glass with a dremmel I was able to totally remove the glass & have reshaped the foam inner manually to similar specs. Not as accurate/pretty as a full custom cut but its coming together nicely for my first pass