Foil assist system in a BACKPACK, dream o reality?

efoils – Electric Hydrofoil Surfboards
1

Hello everybody! I hope my question is not trivial and not been discussed yet.
I’m wing foiler with some years of experience. I already have a few boards and north sonar foil with different front wings e stabs
My aim is to (TRY TO) build a foil assist system in a backpack, something similar to the new Duotone foil assist system:
[YouTube Search: “Duotone Foil Assist 2026”]
and I also saw this video about using the 6384 cheap flipsky motor:
[YouTube Search: “Building a Cheap eFoil that Works! | With 6384 FlipSky Motor 140kv”]
So I have a few questions:

  1. First of all: the backpack solution, hosting battery and ESC, is something that can be realized in DIY, or too complicated, unhandy? Every point of view is welcome!
  2. The 6384 flipsky motor is something I should avoid? I see post of people changing bearings… is it too make waterproof? it’s not waterproof by design? I’still pretty confused about the hardware…
  3. The foldable propellers that come with in this variant:
    Flipsky Waterproof Brushless DC 6384 Motor 140KV 4400W for Surfing Boa – FLIPSKY
    are they something reliable? or shoud I go for a different version?

Then I will need help with all the rest but I’m very interested in your thoughts about the backpack soultions
Thanks to everybody and happy new year

2

Hi,

Search for other threads regarding this matter. Many have built with success backpack assists and most of the information is in this forum.

I am building one at the moment, I put out the specs in a thread a few weeks ago (search for backpack assist or assist on the back, and you will find relevant info).
I can also answer to your questions, but have in mind that I am still on the building process of my first assist and my experience is limited:

  1. Yes, totally possible. Find a waterproof (IP67) box small enough to fit your battery and controller (I went for a camdenboss).
  2. I have ordered the saite 6384, others use FS or cheaper aliexpress. Others should answer on waterproofing.
  3. Others told me that FS foldable propeller is not good. The one from foildrive is recommended. I will try one made by a member in this forums (@Jordi).
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Thanks so much, I’m now browsing the other posts and look for a simple backpack project I can follow… just a question about the propellers, it seems not possible to buy just the propeller on the foil drive website… where is it available? does it fit with all the motora out there? or do I need an adaptor from Flipsky??
Thanks again for the help!!

4

In europe you can buy just the prop from foil drive, not sure how it is in the other continents. But then you might need an adapter, this can easily be 3d printed.

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5

Foildrive prop fits the 6384 bduav ali motor as well as the more powerful saite 6384, without adapter.

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Thanks a lot guys, do you know a good post here with “The shopping list” for a basic kit?
I’m not really able to find a shop to buy 1 single saite, as Alibaba requires me a minimum of 2 units…

I was going with those flipsky modules but I’m not even sure they fits togheter or if I’m missing somthing:

Flipsky motor 6384

Controller VX3

Mini Vesc

As my first diy e-foil didn’t want to spend too much as I’m pretty sure I’m gonna make lots of errors, at the same time didn’t want to completely waste money on the wrong hardware…

Thanks again to everybody! And Good Flight to all!