A-Foil philosophy project (Andrey Filosofov)

Hello dear community!

My name is Andrey Filosofov

I am here to tell everyone about my plans to build efoil and ask questions, which I have accumulated quite a few.

I was inspired by ready-made projects such as LiftFoil and Flite for the construction of the hydrofoil. I was also interested in some hand-made projects with gearboxes, but for now I decided not to use gears.

I already have a mast and a plate, I bought them here:

I also seem to have decided on the battery, it will be LiFePo4 with a maximum charge of 60 V. This voltage is used, for example, by Flite.
The charge board will have an anti-spark, a button and a display.

Recently, however, I began to doubt the choice of voltage, as I hear a lot of talk about safety. Therefore, my question is: how much does the risk of getting problems with current increase at 60 V, as opposed to 50 V? With an average current that the motor will use 50-150A.

The main questions now are about the motor and ESC.

There was a lot of hope for the engine

But I hear a lot of conflicting reviews.

Still not clear:

  • with which propeller its current consumption will be optimal for 50 V and 60 V

  • is it really well protected from water?

  • Does the CV actually correspond to the declared one?

It has a good price, and I really would like it to work well.

I am also looking at this engine with a standard 190mm / 7.5 ‘’ propeller. However, the following are not clear:

  • is this setup, assuming 60 V, will it be optimal with 100KV or 120KV?

  • how many amperes does this motor consume in the worst case scenario (100 KV and 120 KV)

All this is needed to determine the ESC.
I plan to use the regulator without forced water cooling, it will be located close to the plate. The plate and mast will dissipate heat. I consider this scheme optimally, since only 3 wires are needed for switching, there are no other unnecessary elements.

At first I wanted to use a regular hobby regulator like this

But after reading the forum, I realized that VESC has excellent opportunities.

It remains to decide on the power, the price strongly depends on this.

Please tell me,

Is this ESC ok?

Or is this enough?

https://aliexpress.ru/item/10000070081915.html?spm=a2g0o.productlist.0.0.58152cc41lDGF2&algo_pvid=b0e8bed4-63a3-42d7-8e49-6a4bb259ea44&algo_expid=b0e8bed4-63a3-42d7-8e49-6a4bb259ea44-36&btsid=0b8b034a16231085885883926e37f9&ws_ab_test=searchweb0_0, searchweb201602_, searchweb201603_

Maybe just use Trampa?

Thanks in advance for any answers.

Can’t recomment mtvesc6.12, see here: Maytech 200A MTVESC6.12 VESC 6 based ESC
I would suggest to use maker-x Hi300 instead: https://www.makerx-tech.com/products/go-foc-hi200-hi100-75v-200a-esc-based-on-vesc-accepting-order
Or of course Trampa 75/300 or 100/250: https://trampaboards.com/vesc--c-1434.html
A200S is is also a good choice but the 16S version is unavailable at the moment (12S is available): https://teamtriforceuk.com/a200s-v3/

2 Likes

Trampa and A200S look just fine, but I will most likely be looking towards the HI300 (75V 300A), it is very good for the price, and it looks good.

Were you aware of any problems with him?

Thanks for the caveat on mtvesc6.12. I almost bought into its presentation and additional functions, such as an antispark

I got one that is HGL-Tech branded for even cheaper but it is sold out: https://firduo.com/products/hgltech-hi200-75v-200a-esc-base-on-vesc-for-e-foil-surfboard-hydrofoil
The other two variants available on this site and also from Flipsky are slightly different, one is the watercooled version and the other one hast 2 uart ports and an aluminum lid. Although they are considered an upgrade some people had problems under load with those due to a production issue. They also cost more. The maker-X is still available and looks identical to the one I use. Mine works fine with only passive cooling in an alu box on an alu plate, 63100 outrunner, max motor current 150A. There is always a risk when buying stuff directly from China, that’s the price for getting it cheap.

1 Like

With two UARTs, is this this one?

Are there many advantages of the second UART? Here on the forum I read that one of the creators ran into a problem when he could connect either a Bluetooth modem or a remote control to his ESC.

I plan to start using this receiver with a remote control

Obviously it uses the UART, which obviously carries all the telemetry.

Do I need to connect a PWM cable?

Later, I want to design my remote, which, with an e-ink display with GPS, is based on open source projects.

By the way, here I see a lot of travel tracks that people post. As far as I understand, they get them through the VESC system. In this case, what is the GPS module connected to?

Some people got a unit of a bad batch of this vesc clone which they had to send back. Second uart could help if you want to connect metr.at and a remote that displays telemtry data like voltage, current, battery levele a.s.o. The logs provided with a link are from metr.at, a module you connect to either can or uart port, there are different versions available. Either you use the gps of your mobile phone or you buy a metr module with gps module and sd card. Metr also allows you to configure the vesc through tcp bridge. This way you don’t need to connect it to usb to change parameters.

1 Like

Hi, that’s a clever philosophy - see the display in full sun even at the equator. It’s going to be a very rewarding, but also a very complex project.

I have a similar display on my e-bike (I ride it every day) and I can see the readings absolutely perfectly in the sun. When it’s dark, I just turn on the backlight. Using a color display makes no sense, total waste. I plan to use only the smartest technology on my future e-foil.

When do you plan to start the project?

Thank you for your interest.

In fact, I have already seen liquid ink display on some foil remotes, and I spied the idea from them (I don’t remember who has such a remote control).

So far, the project is at the level of an idea, and at the beginning I want to try a ready-made solution, for example, Maytech.

For now, I’m evaluating the feasibility of creating a completely custom console.
But maybe I won’t go into the jungle of programming, but I’ll limit myself to replacing the display with electronic ink on one of the ready-made solutions