Assist build from Israel

Generally yes, I am aware about the super glue usages.
I thought you found something relevant to motor.

I put the epoxy between the magnets and spray paint after.

I’m not sure what they mean about the quiet part, but they must put the rotor on a balance machine and use balance glue to smooth it out like they use weights on a car wheel for balance.

I have used super glue with baking soda to fix plastic pieces, but I’ve never tried bonding it to metal. That would be so much easier than mixing all that filler in the epoxy. I would definitely like to hear how well it works.

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I used the milliput 2 part epoxy that you knead together press in with icecream stick.
Worked well thought might be bit eaiser than epoxy. then coat of rustproof paint.

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I used a hand drill to cure thickened epoxy with micro ballons regularly.


Great idea and great video about motor!

Why the hand drill? To generate a centrifugal force to spread it ? :grinning:

Yes, to prevent it to flow to one side and get the bell unballanced.

I see, so it balances it , cool!
How did you connect the drill? 3d printed some adapter?

So for balancing - epoxy microbaloons is the way to go.

It was more to prevent the epoxy to flow to one side, not to balance it. I use a flanged shaft for the prop, so it was easy, just put the shaft in the vice.

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ok, so you found flanged shaft which fits the holes.
I made once an adapter to balance 3d printed prop. I found that the blades are very similar in weight up to 0.01gr , so i stopped with balancing.
'Printables

I made one: Daniels (un)geared inflatable (slowly built) - #55 by sat_be

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Actually it is 4 columns of 3m double side tape.
You can see in the picture two box holders - each having one column to be glued to the board.
Here what happened is that board was in the car on it’s side and only the bottom side of the box was tied with the red strap to the holder. With the 2.5kg battery.
It got disattached as you can see. But I think it is a good test - it is not indicative of the usual stress when both sides tied and in the water.
And it can be seen that the connection to the 3d printed material was worse than to the board, so it can be reinforced with some epoxy or e6000.

Propeller base does not hold:
'Printing a propeller - #7 by lishine

Condensation in box:

It happens also on the battery itself.

Which means - electronics should be coated.

Is your water temperature a lot colder than the air? Thats a lot of condensation.

No, water temperature now is about 32c and air temperature about 35c.
It happened overnight, when air temperature dropped to about 27.
So the box should probably held open after the use.

Well, till far, for a few sessions - the superglue with soda holding well.
It was easy to apply. Enough to put a little near the top between magnets.
Just need to be sure it is lower than the magnets.
I will update if anything goes wrong.

@Jesserosco
In order to dip motor into corrosionX you dissasemble it from the mast, right?
The other thing that disturbs me about corrosionX - is that it smells very tough I would say - not to do it inside an appartment or even a car. And the smell stays on the motor.

@lishine Pavel, thanks for replying on my thread and pointing me here. Your build looks great! I have a few questions, if you don’t mind.
1.Is your battery 2 separate 6s3ps connected in series or just a single 12s3p?

  1. With regards to the fuse, if it is a 2x 6s3p, where have you added the fuse? Is it after you’ve connected the two packs together? Or is is there a fuse per pack?

I am glad to help any way I can. And BTW there is a website I made to help with the knowledge - see first post in this thread - to be updated soon.

It is 6s3p x2

Here in this picture, you can cross reference it to the other pictures above.
Black wire - is the bottom of upper bank.
Top of the upper bank is the right edge of top battery - from there copper enters the petg cover, from right to left goes the fuse and then connected to ther red wire that goes to the outisde.
Bottom bank straight goes outside with left two wires.
So yes, the fuse connected to + of one of the banks.

But in the future I would put fuse outside between esc and battery.

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@lishine Pavel, what pico fuses are you using on your set up? 2.0A?

Yes, currently I use 2A, that means charger balance to use max 1A.