Electric Surf Board

Boats, Jet Skis, Kayaks etc., including hovercrafts
fabianpusch   1 W

1 W
Posts: 60
Joined: May 28 2016 5:07am

Re: Electric Surf Board

Post by fabianpusch » Jan 12 2020 6:22am

Hi Chris
Second hand, a 2016 race.
Waiting for some nice weather to ride it.
Actually I have sent the board to Jetsurf, so they can do a big check up

Louiss   10 mW

10 mW
Posts: 20
Joined: Aug 10 2014 6:32am

Re: Electric Surf Board

Post by Louiss » Jan 12 2020 9:01am

Hi Guys, I haven't been here for a long time. I was so busy meantime and I didn't have enough time to my electric surf. Project stays as it is, it rides but it was a little slow, battery last only 15min. and so on. For this season I decided to rebuild the surf for something more compact and light. I leave the rigid board and go to inflatable small size SUP board. The propulzion will be my old Torqueedo housing with 7:1 gear reduction, new Turnigy G160 Brushless Outrunner 290kv, torqueedo speed prop, 120A HV controller, 10Ah 12s Lipol battery pack, 2.4GHz remote controller. All this stuff except for batteryes monted in to torqueedo housing, the batt in waterproof box on tail top side on SUP. All this stuff will be detachable like a conversion kit from paddle to electric SUP.
Actually I ordered the parts needed mostly from HK, and Ali when stuffs arrives I will share my building progress.
Meantime I made a small research whats new on this scene, and I find this guy who made a similar thing, check it: https://www.youtube.com/watch?v=QBKDYsAhiuc

chris_kline   100 W

100 W
Posts: 105
Joined: Sep 20 2017 9:51am

Re: Electric Surf Board

Post by chris_kline » Mar 18 2020 7:28am

if anyones interested in a build video, https://www.youtube.com/watch?v=p6V4zLt6Xys

fabianpusch   1 W

1 W
Posts: 60
Joined: May 28 2016 5:07am

Re: Electric Surf Board

Post by fabianpusch » Mar 20 2020 5:17pm

Cool video 😃 really nice and your location too.
Actually I am building up a lot of things for the Jetsurf...new plates for a binding, a hydraulic throttle....

chris_kline   100 W

100 W
Posts: 105
Joined: Sep 20 2017 9:51am

Re: Electric Surf Board

Post by chris_kline » Mar 21 2020 3:31am

fabianpusch wrote:
Mar 20 2020 5:17pm
Cool video 😃 really nice and your location too.
Actually I am building up a lot of things for the Jetsurf...new plates for a binding, a hydraulic throttle....
hydraulic throttle, sounds cool, what components are you using? might have to add that

fabianpusch   1 W

1 W
Posts: 60
Joined: May 28 2016 5:07am

Re: Electric Surf Board

Post by fabianpusch » Mar 21 2020 1:26pm

https://www.fechtner-modellbau.de/fahrz ... olben/?p=1

Something like that. Actually I am doing a little experiments with the actuator from Magura. They have a acutator for the hydraulic clutch...

nelsonset   1 µW

1 µW
Posts: 1
Joined: Apr 03 2020 4:37pm

Re: Electric Surf Board

Post by nelsonset » Apr 03 2020 6:06pm

I'm going to 3d print a jet drive and do a few experiments. Was wondering what is the best way to seal the driveshaft from water? diagrams would be really appreciated or even a video.

Louiss   10 mW

10 mW
Posts: 20
Joined: Aug 10 2014 6:32am

Re: Electric Surf Board

Post by Louiss » May 22 2020 10:55am

Hi Folks,
I decided to try out the Boston Swing 5300 mAh Li-ion cells. Batt configuration is 8p 12s, overall capacity is 42Ah. Not tested yet on full load, only on 20-30A, but the batteries seems to be soft. Charged to near 50V, and the voltage drops to 48V under 30A load. That indicates the batteries has high internal resistance. Not great for high C discharge. I'am curious how they perform under full load. Here some pictures about batteries:
https://www.rajce.idnes.cz/f1439398734

fabianpusch   1 W

1 W
Posts: 60
Joined: May 28 2016 5:07am

Re: Electric Surf Board

Post by fabianpusch » May 25 2020 12:43am

Hi
Nice build of the battery.
I think you are right, if they are dropping by 2V, with a load of just 20-30A, they are not really suitable for a higher load like 150A it more. What are the specs from the manufacturer?
Bye Fabian

Louiss   10 mW

10 mW
Posts: 20
Joined: Aug 10 2014 6:32am

Re: Electric Surf Board

Post by Louiss » May 25 2020 2:13am


Neo709   1 µW

1 µW
Posts: 2
Joined: May 27 2020 10:11am

Re: Electric Surf Board

Post by Neo709 » May 28 2020 5:41am

chris_kline wrote:
Mar 18 2020 7:28am
if anyones interested in a build video, https://www.youtube.com/watch?v=p6V4zLt6Xys
Amazing job! :thumb:

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