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Re: Electric Surf Board

Posted: Aug 19 2018 2:39pm
by toto44
Today I tested my 3D printed jetdrive. Could not do any measurements, but gives a lot of power.

https://youtu.be/NewKjySw2ko

Re: Electric Surf Board

Posted: Aug 20 2018 1:56am
by srn
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 ?

Re: Electric Surf Board

Posted: Aug 30 2018 3:37am
by srn
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.

Re: Electric Surf Board

Posted: Aug 30 2018 4:37am
by madin88
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?

Re: Electric Surf Board

Posted: Aug 30 2018 6:44am
by srn
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€.

Re: Electric Surf Board

Posted: Aug 30 2018 10:04am
by toto44
Hello SRN

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

Re: Electric Surf Board

Posted: Aug 31 2018 9:36am
by srn
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.

Re: Electric Surf Board

Posted: Sep 02 2018 2:24pm
by ropower86
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?

Re: Electric Surf Board

Posted: Sep 03 2018 12:36am
by srn
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€.

Re: Electric Surf Board

Posted: Sep 05 2018 12:06pm
by srn
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

Re: Electric Surf Board

Posted: Sep 05 2018 2:40pm
by fabianpusch
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.

Re: Electric Surf Board

Posted: Feb 19 2019 3:59am
by Christyy
Hello, about electric surfboards, and more specifically to buy one. What do you think of these https:// awakeboards.com, is it worth investing?

Re: Electric Surf Board

Posted: Feb 22 2019 1:45am
by fabianpusch
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.

Re: Electric Surf Board

Posted: Feb 22 2019 1:46am
by fabianpusch
Important, not the peak Amps....the real Amps from the battery

Re: Electric Surf Board

Posted: Jun 11 2019 6:53pm
by ropower86
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:

Re: Electric Surf Board

Posted: Jun 13 2019 2:49pm
by fabianpusch
That Sounds really nice...
Now I am a little curious :D
Show some pics please to reanimate this old and dusty thing....