I decided that this was the summer I would build an efoil. I had looked at it a couple of years ago when I built my wakefoil, but felt it was far too expensive then. I already had a board, mast and hydrofoil, all built by me. So only the electronics was missing
(diffrent front wing in picture)
By looking at the things i would need ESC, Motor+prop, remote and battery it would come in at around 900 Euro.
Electronics:
- Flipsky 75100 (watercooled)
- Flipsky 6384 motor
- Flipsky vx3 remote
- 2x turnigy 6s 16 ah lipo
- xt90 connector + some 8awg wire
Extra
- Inspection hatch
- epoxy+fiberglass
Challenges:
Firstly i had no idea how much power i would need, turns out ~1600W (40v*40A) to get up so. 70kg, 1150cm^2 front wing, nice cruise speed 15km/h
Something else was that I didn’t find a lot about here at first wast the best connection between mast and board, I would need passtrought for both wires and cooling tube.Then i found this thread
My adaptation
Cut a hole with a hole saw and glued it in place.
I also needed to make an electronics compartment. Since the board only is 100mm thick this ment cutting down to the bottom layer of carbon, unlickely i had put a board handle here that i had to remove.
Glassing the inside of the box, should have added fillets in between the box and the top
Result:
I would then glue back the piece i cut out with the inspection hatch
I also carved a path between the mast coupling and the electronics bay for the wires and water tube.
What I would have done different:
The reason i choose lipo was to avoid having to build my own battery. If i do another build I will probably chose 18650 cells.
Cooling. Passive cooling on top of an alu mast looks so much simpler than routing water tubes into the board.
I would also have moved the mast 5cm further back, cuse now i really have put a lot of wheight in the front
I have shared all lot of cad / 3D models on my printables side. Wings, board and gland coupling.
Hope this helps someone
