Direct Drive with SSS 56123 230KV?

EFOIL.builders Propulsion System (Motor, Gears)
1

Hi,
did anybody try the SSS 56123 230KV as direct drive with a 80-100mm prop?

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With 12s it would be about 10.000 rpm - 4" 4 blade prop with 4" pitch should be around 40kg static trust.
Can this work to :surfing_man:
Mike

2

The biggest issue is that you will way surpass the max amp draw on this motor.

3

I don’t think you will get enough torque with it. You need at least 3Nm to foil, while this motor gives you around 2Nm @ max power I think, just like the 56114. You’ll most likely burn it before getting on plane.

4

There was a youtube build with a direct drive 56114 motor that I think would be fast enough to foil with a big foil, but i can’t remember where it is. If I find it i’ll add the link in here.

5

I posted the video a while back. He used the 56114 that’s true, however I don’t think it will fit our purpose. Never tried so I don’t know. Just my 2 cents

6

this one: https://www.youtube.com/watch?v=QBKDYsAhiuc ?

I think it would work, but you wont have a huge amount of speed to play with…

7

Was going to post it at the exact same time haha

8

This video was the reason to think about - would be good to know how much amps :question:

1 Like
9

In that video he used a 700kv motor. Why not start with something similar to what he used?

10

Because he run with 6s and I would use 12s to get lower amps - and I think 15.000 rpm with a 94 mm prop is not optimal - what do you think.

11

I would use either a 360 or 400KV motor.

12

Do you think the wire diameter is to thin at 230kv?

13

What is max Amps? Cannot find the specs anywhere. Only for the 500kV

14

I ask them for the specs but didn’t get a answer :-1:

15

Mhh … but some of them didnt yet start working because of the virus stuff there.

My 350 kV has 93A max. So I guess its will be less than that. maybe 70A

16

From what I’ve seen, the 230kv version of this motor has a max amperage of 87A and max voltage of 108V

https://www.ebay.com/itm/SSS-56123-Brushless-1-5-Motor-9400W-56-123mm-for-Car-Boat-Efoil-/264543674699

1 Like
17

Though using the equation

torque = (8.3*Current) / (Kv)

That puts as at roughly a Max torque of roughly 3Nm… not great… too bad, because I got really excited when I saw they had mad a 230Kv motor too…

18

Thanks for the Update!
For the torque I came to a different number:
230 kV equals 0,04152 Nm/A so 3,61 Nm @ 87A