Update: Newly designed folding blade housing I made in fusion360. Works very well, more aerodynamic.
Have a few ideas about how to house the cables too. Will post when done.
STL 3d print file here (just use M3 normal screws for the blades and inside, you need 4 of them. 3x M340mm and 1xM330mm
https://www.printables.com/model/337289-foldable-blade-foil-assist-for-flipsky-65111-motor
@SurfingElectronics
What version of Flipsky 75100 VESC ESC do you chose? Water or air cooled?
Are you sure that this motors are good for salt water?
@ninux
I’ve used this one:
https://www.aliexpress.com/item/1005004553123950.html?spm=a2g0o.order_list.0.0.51b31802jWpPWA
[Aluminium ESC](type or paste code here](Flipsky 75100 With Aluminum PCB Based on VESC For Electric Skateboard – FLIPSKY)
UPDATE: Installed the following 2 safety features.
If inside the box gets hotter than 60C, the electricity will cut off → this is done via a temperature switch.
Outside the box, I’ll have a magnet attach to a thin rope attached to me, so if I call it’ll detach, and the electricity will cut off → this is done via a magnetic switch
end result:
It works perfectly. So if too hot, or if I fall of the foil, the system will automatically switch off, and the batteries won’t be connected to the speed controller.
Nice solution and good progress!. I will stick with the traditional DS18B20 temperature sensors and do the temp readings in software. BTW my motor is still not arrived lol.
Update. System works well. Quite powerful.
This box is cheap and very waterproof. Had it at the bottom of the pool for 1hr and no water went in ( https://a.aliexpress.com/_mLiPciS )
Next. Change the settings on the VESC system for the remote. As now there is no transition goes from off to on too quickly and the motor gets clogged. I appreciate help with this.
@chrisfoil when do you reckon you’ll get the motor? Very curious to see how you set it up using VESC software. Also what remote do you plan to use?
Your battery setting is not correct.
You’ve chosen Lithium Iron 2.6v 3.6v (eg LiFePO4) , you’re using LiPo whose voltage varies like Li-Ion so 3.0v - 4.2v
Thanks a lot @SoEFoil so I’ll change that to LiIon instead.
Any recommendations on how to set up the remote control such that if I accelerate fully, it’ll do it but slowly? Currently it dot so quickly the motor suddenly clogs itself.
Thx
I finally got my motor on christmas day, what a coincidence haha. So I am currently into designing the remote housing for the sender unit, as I want to build by own remote control. The prototyping went good so far with BLE and hall sensor for throttle etc. I hope it will be somewhat waterproof xD
I can post some images when I fully assembled it, maybe next week. That means that I cannot spend anymore time on motor etc.
App Settings / VESC Remote / Throttle Curve: two parameters in efoil/surf mode (XX no reverse):
Everything is explained here for an Esk8 which has a (Throttle expo) brake feature not present for efoils:
I am following your ideas too. Thank you!! I would like to learn how to use Fusion 360 too.
I have a question: what is the formula that determines which battery voltage/amperage to use in relation to the motor and ESC?
Thanks again for any answers or comments.
Todd
Hello,
Nice Project, I’m thinking going in the same direction.
But is 12s lipo with 160kv motor not too fast for the propeller ?
I saw 160kv with 6S liion configs, if I remember ?
Advantages I see is to be able to use battery to the end (near 36V), and with foc efficiency will not be too bad at the beginning or when driving at 25%
But what about 12S voltage and possibles salt water injuries ?
Thanks for help
Hello @tkramer, Fusion 360 doesn’t take that long to learn. There are so many tutorials on youtube.
Regarding what are the voltage & amp requirements, those are get dictated by your motor. Check the specifications of the motor you are looking at. e.g. for the motor I have used, Flipsky 65111, the manufacturer posts the following specifications:
Therefore, I know I’ll need between 8 to 12 cells. Using 3.6V/cell it’ll be a range 33.6-50.4V range.
Then Max Current is 70A.
Therefore need to ensure the ESC can handle such voltage range and peak current.
good luck
@jpx this project is not for an e-foil, but rather a foil assist, to have a 10sec burst to let me take off with low winds. Hope soon I can test it in the sea soon.
Lipo & water are not very good friends. A good waterproof box is essential. Try it out first without electronics inside. Also check this post: Foil Assist with Flipsky 65111 for Axis Mast (and Flipsky 75100 ESC) - #21 by SurfingElectronics
on the 2 kill switches the set-up has, one temperature switch, another magnetic one in case I fall.
enjoy it!
@chrisfoil great!, looking forward to see your set up. Share the details of your remote control. Not happy with the cheap one I got. So got a Flipsky vx3, which I’m waiting for.
Just a fyi, there are a lot of fake fotek ssds out there and even the real one probably would would need a heat sync if you were really going to be running anywhere near the 100A rating.
Also not sure if cutting off the battery while the prop is moving will generate a large voltage spike on the ESC and SSD, that could kill it if it goes over the mosfet ratings.
For the remote check the range that you don’t have glitching, I had the same one,. There was a couple positions that would glitch full throttle or no throttle, the theory was the code in the remote was bad, but they might have fixed it.
Prop looks sweet! Is it popping open and closed as expected?
Had the first time in the sea yesterday. worked ok. It gave me just that push that I needed to be up on the foil.
@brycej The SSD I got it off Aliexpress. For now works well, haven’t checked what’s the max current it reached while using.
Good point on cutting the battery while prop moving.
The remote finally working well, I followed the @SoEFoil 's recommendation (Foil Assist with Flipsky 65111 for Axis Mast (and Flipsky 75100 ESC) - #28 by SoEFoil). And now it’s very smooth acceleration.
