Any tips on the first build?


The motor windings absorb a surprising amount. I leave the corrosionX in the motor. The motor should be around half full. I’ve done 4 motors this way. Several months. No issues.

The reason I don’t fill it all the way is to reduce the resistance / drag on the spinning rotor.

I notice no increase in resistance with the corrosionX in there.



Hey there again.

The board is currently working (pictures will follow).
The prop is actually not that bad with the L size allavator from gong, I’m able to get 56Wh/km efficiency.

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Sounds great. Your parts list looks good, I have a similar one. Which remote do you use?

I currently just use a remote that has the PCB covered in epoxy and the pods sprayed with CorossionX. Works okay in sweet water not in salty.

Is it worth it to get the Flipsky 75v ESC max 300 amp versus the 60v 200 ESC? running a 120kv flipsky motor

Depends if you wants to get all te power out of it. The Vesc 200 can do 140A (didn’t test more but has 4 235A capable fets per phase side so should be able to push the 200 no problem.) motor current but even with water cooling will get warm in a minute or 2. It can only handle 80a on the motor continuously without getting to warm. But that should be enough power 3.5kW is a lot for a foil.

Thanks. I ordered a 120kv motor from flipsky, 12 mm threaded shaft. I havent found any printable props that would fit that shaft with the threads. Has anyone found any props files for that type of shaft? I could maybe try and switch my shaft to the non-threaded version…

No stick with the threaded. The other one is much more harder to adapt props for. I have a folding prop that should fit yours I just didn’t test mine yet.

Will do, thanks. Do you know of any other Flipsky 65161 props on the forum that are designed for that specific shaft?

There’s a 100+ post thread for that: :wink:

Tell us what you think of @JvdZ’s 2 and 3 blade props:

Basis specs:
Diameter: 165mm
Pitch: medium, no exact numbers
Blade: 3blade and 2blade design
shaft: 12mm
pin: 4mm
Printed with supports (quite a lot) with a layer height of 0.16mm. Some post-processing is needed.

Didn’t I post it all here? 10mm vs. 12mm, adapter, prop, duct…

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Please, stop spamming all thread, HGLTECH.
You do not contribute to any knowledge.
I hope The forum members do not buy anything from HGLTECH. I Will for sure not do it after all spamming from different users created lately from HGLTECH.
Please, just post in the comercial thread and contribute instead when you have new product that might be of intressted for The members.

Thanks in advance


Thanks! Much appreciated.

@SoEFoil Yes, I have read through that thread a few times, but you’re right probably a better spot for my questions. Most props i’ve seen on that thread weren’t adapted to a 12mm threaded shaft.

@noahark Yes I have read through and appreciate that all being in one spot. I was having a hard time understanding it though because it didn’t seem like any of the fusion files showed a prop with a threaded hole to fit a threaded shaft. They all look to have smooth holes.

They are supposed to have a smooth hole. You should mount the prop with a nut.

@jkoljo This answered so many questions for me. Thank you. I dont know why i was assuming the prop needed to thread on to the shaft.

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A nice nut to use is shown here Blue Mountains Australia Foil Build
Michion suggested the Barrel nut it makes it easy to adapt many propellers to fit. In most cases it will be material off the bore of the propeller.


The long awaited photos. Now that the foiling season is over, I finally have some time to upload some :blush:.

The foam cutting using some molds and a hot wire cutter. And test fitting the 3D printed inside.

Internal seal for the electronics.

Rubbers side view ————-^

Complete board (excluding wing)

Inside with and without battery.

Close up of the electronics. Display is for motor runtime, on time, pump time, stats like volts, error’s, precharge info, PWM in and out and more.

The motor connections and the hole tho connect to the mast. The lid made of alumium with some hex pattern to save some weight.

The mast with the connections and the water input for the water cooling. The mast mount is 3d printed in PLA+ but seems to crack after some time so this would need to be made of aluminum

The battery and the second board i made.

And an action pic :slight_smile:

This was quite a project and took many design and think hours but was definitely worth it all! Thanks for all the tips i got when starting and have fun foiling!


Please tell me more about the motor phase plugs; they are directly exposed in water? I am looking for a solution like this.

That’s the Amphenol Plugs what I am using in my first Akkubuild!

These are indeed the Surlocks from Amphenol, This is the 120A version. I run it at the exposed waterside. And if you keep them dry inside and do not connect and disconnect in the water they will keep on working.