Electric Surf Board

Boats, Jet Skis, Kayaks etc., including hovercrafts
toto44   100 mW

100 mW
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Re: Electric Surf Board

Post by toto44 » Aug 19 2018 2:39pm

Today I tested my 3D printed jetdrive. Could not do any measurements, but gives a lot of power.

https://youtu.be/NewKjySw2ko

srn   1 W

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Re: Electric Surf Board

Post by srn » Aug 20 2018 1:56am

Hello toto44,

good video, looks like a lot of thrust for this small motor. Do you have a log of motor/esc power during this run ?

srn   1 W

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Re: Electric Surf Board

Post by srn » Aug 30 2018 3:37am

Hello,

i changed my carbon impeller to a 3D-printed steel impeller. It is really impressive quality and less vibration.
IMG_3664.jpg
today I will make first measurements of power consumption. Will provide results later.

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madin88   100 MW

100 MW
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Joined: May 27 2013 2:02am
Location: Austria

Re: Electric Surf Board

Post by madin88 » Aug 30 2018 4:37am

srn wrote:
Aug 30 2018 3:37am
Hello,

i changed my carbon impeller to a 3D-printed steel impeller. It is really impressive quality and less vibration.
how much did it cost?
- 10kW belt drive with Neumotor 8057: viewtopic.php?f=30&t=91144&start=50#p1377787
- Fully road legal (L1E approval) e-bike based on Votec V-FR frame
/ MXUS 3T / 17" Mitas MC11 / Adaptto Max-E / 20s12p 25R
- KTM Hardtail Pedelec / eZee V2 6T / 27,5" / Kelly KBSX @ 1,5kW / Torque PAS / CA-V3 / 13s4p Sanyo GA in Shark case

srn   1 W

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Joined: Sep 21 2017 8:50am

Re: Electric Surf Board

Post by srn » Aug 30 2018 6:44am

madin88 wrote:
Aug 30 2018 4:37am
how much did it cost?
I ordered a 62x62mm. They said that it will shrink 2-3% after thermal treatment and finally I got a 60.5 x 60.5 impeller.
It is ~95€.

toto44   100 mW

100 mW
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Joined: Sep 05 2015 5:40am

Re: Electric Surf Board

Post by toto44 » Aug 30 2018 10:04am

Hello SRN

what pitch does your impeller have? Did you balance it?

srn   1 W

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Joined: Sep 21 2017 8:50am

Re: Electric Surf Board

Post by srn » Aug 31 2018 9:36am

toto44 wrote:
Aug 30 2018 10:04am
Hello SRN

what pitch does your impeller have? Did you balance it?
Hello toto,

the pitch is 60mm or equal to D if you scale it.

I have not balanced it yet.

ropower86   1 W

1 W
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Joined: Dec 05 2016 7:50pm

Re: Electric Surf Board

Post by ropower86 » Sep 02 2018 2:24pm

srn wrote:
Aug 30 2018 3:37am
Hello,

i changed my carbon impeller to a 3D-printed steel impeller. It is really impressive quality and less vibration.
IMG_3664.jpg

today I will make first measurements of power consumption. Will provide results later.
How much did it cost you to 3d print in metal?

srn   1 W

1 W
Posts: 61
Joined: Sep 21 2017 8:50am

Re: Electric Surf Board

Post by srn » Sep 03 2018 12:36am

ropower86 wrote:
Sep 02 2018 2:24pm
How much did it cost you to 3d print in metal?
I ordered a 62x62mm. They said that it will shrink 2-3% after thermal treatment and finally I got a 60.5 x 60.5 impeller.
It is ~95€.

srn   1 W

1 W
Posts: 61
Joined: Sep 21 2017 8:50am

Re: Electric Surf Board

Post by srn » Sep 05 2018 12:06pm

hello guys,

i am still testing in my small pool.
now my remote control is working fine. Also the new propeller is doing a very good job.

here my current MGM log. I wonder that I have really small power consumption at 10.000 rpm. At the moment I limited the MGM to 10k rpm for testing. Will try 12k rpm in a bigger pool soon.
Controller 2 history 2018-09-05 18-34-39.png

fabianpusch   10 mW

10 mW
Posts: 28
Joined: May 28 2016 5:07am

Re: Electric Surf Board

Post by fabianpusch » Sep 05 2018 2:40pm

Hi
are you sure that there is really load on the system?
It seems to be really a too low power consumption.
Could be an issue of water mixen with air, less stress for the motor to handle / put through your jet...
On the other side, try to accelerate up to 14000, and measure the pulling force.

Christyy   1 µW

1 µW
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Joined: Feb 19 2019 3:34am

Re: Electric Surf Board

Post by Christyy » Feb 19 2019 3:59am

Hello, about electric surfboards, and more specifically to buy one. What do you think of these https:// awakeboards.com, is it worth investing?

fabianpusch   10 mW

10 mW
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Joined: May 28 2016 5:07am

Re: Electric Surf Board

Post by fabianpusch » Feb 22 2019 1:45am

It is absolutely clear, you have an issue with a mixture of water and air.
Normally you should have during ramp up by 10000 rpm something between 120-160 Amps.

fabianpusch   10 mW

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Joined: May 28 2016 5:07am

Re: Electric Surf Board

Post by fabianpusch » Feb 22 2019 1:46am

Important, not the peak Amps....the real Amps from the battery

ropower86   1 W

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Joined: Dec 05 2016 7:50pm

Re: Electric Surf Board

Post by ropower86 » Jun 11 2019 6:53pm

I see we all went ghost on this post :lol: :pancake: . It seems like we all figured it all out. I will be testing soon, in the fiberglassing stage then Gel coat. I will be making a mold and start producing DIY jetboards if things go well with my new design. :bolt:

fabianpusch   10 mW

10 mW
Posts: 28
Joined: May 28 2016 5:07am

Re: Electric Surf Board

Post by fabianpusch » Jun 13 2019 2:49pm

That Sounds really nice...
Now I am a little curious :D
Show some pics please to reanimate this old and dusty thing....

ropower86   1 W

1 W
Posts: 56
Joined: Dec 05 2016 7:50pm

Re: Electric Surf Board

Post by ropower86 » Jun 18 2019 11:45pm

Here it is fabianpusch
Attachments
myboard.jpg
myboard.jpg (25.45 KiB) Viewed 145 times

ropower86   1 W

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Joined: Dec 05 2016 7:50pm

Re: Electric Surf Board

Post by ropower86 » Jun 18 2019 11:47pm

Where are you standing now with your project? :?:

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Bazaki   10 kW

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Joined: Dec 25 2009 6:29pm

Re: Electric Surf Board

Post by Bazaki » Jun 22 2019 4:09am

Everybody moved to the efoil builders forum:) so many are already riding there electric hydrofoils

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efMX Trials Electric Freeride   100 kW

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Re: Electric Surf Board

Post by efMX Trials Electric Freeride » Jun 22 2019 12:26pm

Bazaki wrote:
Jun 22 2019 4:09am
Everybody moved to the efoil builders forum:) so many are already riding there electric hydrofoils
link?:)
some ride & sk8 videos:
metacafe.com/channels/NATAS666DAMIEN
http://www.youtube.com/natas666damien
i have nothing for sale.. :)

fabianpusch   10 mW

10 mW
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Joined: May 28 2016 5:07am

Re: Electric Surf Board

Post by fabianpusch » Jun 24 2019 12:42am

https://efoil.builders/

Here it is...
But they are really focused on Foilboards.
But still interesting....

At ropower any test rides done yet?
Looks short, really short.
I am interested about the feedback.

srn   1 W

1 W
Posts: 61
Joined: Sep 21 2017 8:50am

Re: Electric Surf Board

Post by srn » Jun 24 2019 12:49pm

I did some progress and now only wait for vacation to do some water tests.

I especially modified my batteries. Now running on 48 pcs 20700 liion cells, 12S4P. Each parallel pack with own 60A BMS.
I also build a power distribution board, where I put in all battery packs and charger (for charging all of them simultaneously. It has a display with voltmeter, a hall sensor for current measurement and 8 additional capacitors.
Attachments
surf.jpg
surf2.jpg

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