Volker’s Build - 80100 18650-30Q

Just make sure you flush it with fresh water from time to time to avoid salt to block it.
That’s an advice i didn’t follow and i think i’ll have to clean mine as my tubes looks ok, but the flow is getting lower…
I’m always surprise at the qty of salt I get at the bottom of my mast when the water slowly seeps out …

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I wanna stay on the safe side…

Foil

1620g pure beauty:

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OK, today was first test in a bucket…
and now: The motor sounds like a old barn door. Further Investigation: The big bearing seems to dissolve into rust fast as hell :roll_eyes:
So i guess, i’ll have to wait for new bearings


Update next day
Now i cant turn the big bearing anymore.
Lucky me i already disassambled all bearings and gave them a final Destination:

RIP

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As I said before just remove this bearing and the cross part around it, the motor will run just fine and will win hundred watt in losses.
The can will still be maintened by the back bearing. We

I am afraid, that it will wobble and ruin my epoxy coating or even more :astonished:

Only for you @Mat, or cause i had to open the motor anyways:

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Tested on mine, also smaller one such as 8072,63100 does not have this bearing and the motor is still rigid enough.

Maybe i’ll give it a try…
I was thinking about to replace one of the small bearings by a spacer, cause there is almost no radial load on it, only axial…
I think, there is no need to double up the bearing at the Propeller end

Propeller
As i know, the Foil will need less power than other foils, i decided to shave the proven design of @Mat link down to 140mm, while rising the pitch by 10%.
I hope, that i can foil with less rpm and less current.
I have the original Pitch and a +20% pitch on spare, so i can compare.
https://www.tinkercad.com/things/4uWjfWiH4ms


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Let us know how it goes… best way to find the most efficient one is trial and error… once you have it, it will be worth making a mold to get a nice carbon prop! :slight_smile:

ESC & Switch

OK, 56 screws for the hatch(es), but:
The Back one with 30 screws i only have to open for Service or programming ESC.
The Front hatch is to charge the Battery.

At Home, everything is screwed tight.
To switch on, i have 3 reed-relais
First one switches the 12V3A/5V0,5A Buck on.
Second one switches a small 12V Relais with the 50Ohm resistor to load the Caps (Antispark)
Third and last one switches a 200A Relais and Powers the ESC fully on.


So at/on Water i dont have to open the Board at all, i can turn on and off easy by inserting a small magnet in a hole. The Magnet stays in place, cause i glued a small washer inside.
100% waterproof switch kinda IP99 :smile:
Highly recommend is the Progbox for easy setting changes. Works like a charm.
Changing Timing for testing, no problem. Or limiting forward to 25%, that the kids can have some fun, without flying…

Last, but not least:
Amperemeter:
Easy installation, cheap, good readable, programmable, low battery warning and more

Sure, i will…
as soon i dont have fiever :face_with_thermometer: anymore and my bearings arrived… :triumph::angry:

The mold and Carbon may be a good idea, but i am not that talented with fiber and resin.
I am happy, that everything went well with my board :joy:

Thread and posts updated, added pictures, links and files…
If anyone uses my files, i would be glad, If you leave a comment :blush:

First day “open water”
I am a bit scared and nervousIMG_20190814_144541

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Good luck with this beauty!

Omfg, thats so fun :smiling_face_with_three_hearts::heart_eyes::smiling_face_with_three_hearts::heart_eyes::smiling_face_with_three_hearts::heart_eyes::smiling_face_with_three_hearts::heart_eyes::smiling_face_with_three_hearts:

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Foiling with this Propeller
46V 33A min for foiling and 40-45A for nice riding speed
Going full speed, Low ride and ditching watersurface takes 105A 44V

Overall 2kW for nice riding speed is not Bad.
That Foil seems to be really Magic.

If i throttle too fast up at low speed, i loose sync. 22degree timing.
Any Suggestion?

Nice. Did the same thing, riding my 63100-foil with original bearings for two or three weeks. 5/7 would not do it again.

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Riding the original pitch prop uses less Amp to get on foil, but once foiling i need about 10% more amps.
Conclusion so far:

140mm Prop +10% pitch
Round about 70-80A to get up, once foiling i need at least 35A 45V 1600W for foiling
When i go down to 30-33A, soon or later i stall the wing.
40-45A gets alrady quite fast
I guess reducing diameter and increasing pitch was a good idea.
Next time ill test +20% pitch, but i guess, that will be too much.

140mm original pitch:
50-60A getting up, 40A 45V 1800W for foiling

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