Very slow build from France


#243

just thinking how to wire my 3 cases, last year i used 10awg wire with high amp and no problem, i might use 8awg this year, i found this nice video


#244

thank you , not that expensive i will try it i think

https://www.castrocompositesshop.com/fr/93-de-base-non-tissé


#245

Carbon is very conductive and I would not use it for a battery box. I have been looking at thermoforming 3mm Kydex for a battery enclosure. It’s super strong (strong enough to stand on) and not too expensive. You can also bond it really well if you need to.

I think Riwi was suggesting carbon for the bottom of the board though just to reinforce it.


#246

Although carbon will make the construction stronger, there is nothing stopping you from using Lantor with fiberglass.


#247

I will be using carbon and lantor Soric for my lid. The battery is protected by petg, rubber and shrink tubing.


#248

Hi Alexandre. Im very impressed with you build, and Will be following it closely, for ideas to my own build.

Are you using a special High speed rotary lip seal?

You put the thrust bearing outside the seal, is it stainless steel? Or are you only surfing in fresh water? Or do you plan to replace in often, whenever it gets rusty?


#249

thank you,

no special high speed lip seal, classic good quality for 3000rpm (not much…)
yes only fresh water with stainless steel thrust bearing outside (just surface rust on the shaft)
water inside the pod, not all the time, but it was coming from the wires and i didn’t use any o-ring just tape, so the motor get rusty in 3 days if not taken apart and clean
but still this prototype lasted long enough +40hours and it is still working

with the new design (o-rings) , silicone filled around motor plugs… i want to keep the water out…


#250

working on the battery … Still missing the 18650 (money money …)

Or a power wall :smile:


#251

New motor from tfl (56.00mm) , propeller shaft @Flying_Rodeo, watercooling …
Need to trim motor shaft to 5mm


#252

Nice, I found the Reissener get quite a bit hotter than my torqeedo gear. You going to put a heatsink on it?


#253

Yes , get some Heat from the motor too
I was thinking ( same as my first built but bigger)
Aluminium tape 38mmt to 40mm or copper
Tubing 20mm long
40 to 45mm
45 to 55mm
Then cooper or aluminium 0.8mm rolled
And another Longer with the motor 56 to 57mm


#254

Just a big mess and almost miss the 5.0mm but i did it , got the motor shaft from 10 to 5mm to fit the gearbox pinion


#255

Unit for 2019


Tubing is 60x260mm

It can be shorter but i leave room for plugs and wires


#256

Have you tested a battery with the NESE modules? I was thinking of making battery with these but concerned about current draw.


#257

Just received this week a big package from nkon :smile:

My main concern with the battery built was continious max amp draw

I wanted to use full cooper , N.E.S.E are well designed , not worried about amp draw , this built with 24 modules could support 400A , but it is mainly depending on cells temp : Max around 70c… So 30q or vtc6

Test in a few days


#258

What BMS are you using?


#259

No BMS will be used, the battery is split in to 4 x 6S 24A, charged and balanced with lipo chargers (lithium ion mode 4,1v), discharge protection by the vesc with current control


#260

Ohh, OK. Is it the Trampa VESC PLUS 6 you use?


#261

Waiting for @Trampa answer me , but i want to use the 75/300


#262

@Alexandre, dont forget to use extra protectors on your cells:
image
When inserting, get them in on an angle, positive first, negative to bare tab without compression foam.
Build is looking awesome btw!
@g.gregory8 Modules were tested over 200A discharge. Currently there is no cell to cap NESE modules @ 6P: