Electric Surf Board

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

100 mW
Posts: 38
Joined: Sep 05 2015 5:40am

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

1 W
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Joined: Sep 21 2017 8:50am

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

1 W
Posts: 60
Joined: Sep 21 2017 8:50am

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
Posts: 2744
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

1 W
Posts: 60
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
Posts: 38
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

1 W
Posts: 60
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
Posts: 53
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: 60
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: 60
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: 24
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.

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