Electric Surf Board

Boats, Jet Skis, Kayaks etc., including hovercrafts

Re: Electric Surf Board

Postby Jezza » Thu May 11, 2017 10:25 am

dirkdiggler wrote:Not too impressive on the water, but looks like a working concept. The motor looks like a 6364 size, could be bigger.
They have a few pictures on a website, don't speak or read Spanish so don't know if there are any other details to be found.
https://www.behance.net/gallery/43562273/RAYBOARD-ELECTRIC-SURFBOARD


That's a lot of effort put into a bad design.

There's a reason the Jetsurf is flat underneath:
- easier to get on the plane and faster top speed.
- better turning (also helped by better rails)
- more stable

Even the older stand-up 550/650 jetski's had a relatively flat hull.
Last edited by Jezza on Thu May 11, 2017 11:00 am, edited 1 time in total. View post history.
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Re: Electric Surf Board

Postby Bazaki » Fri May 12, 2017 2:34 am

Hey Guys,

No secrets here anymore.

Months I have thought to set up my own company with an electric jet surf, so I could not really share my details.
But I'm doing other things lately and the jetsurf is just standing here. So I want to share all details now.

I found out the exact details of the Lampuga jetsurf.

Lehner motor 7040/6 about 1000 euro
MHZ jetdrive 64mm about 650 euro
Mgm compro ESC ( 25063 ) I think it was their industrial ESC not the hobby esc. about 1000 euro
14s lipo

I bought the same motor and jet drive, very expensive. and bought the cheap flier waterproof 420a esc.
First I bought the swordfish 300a + but gave only 50% throttle, never worked well.

Here is the old video:



The board is a surfboard with too much rocker and the board is too small. Also I had some water leaking in.

Now I made a plexi glass box, so I can test it at home under water and everything is 100% waterproof, even the lid that is on top. Works perfectly dry.
Watercooling is running good, and I use 14s lipo, the motor runs 320rpm kv unloaded and with load 280 rpm kv. So that is about 15.000 rpm for the jet.

It is not as with an ebike, with this you need 11kw continiously, so the efficienty needs to be as high as possible, everything needs to match perfectly.

At 55kv it takes about 200A and everything stays pretty cold, but somehow I burned 2x a Flier 420A esc. I'm also not sure why the esc broke, it was running fine under load, cut off throttle and it didn't work. Now I wanted to invest in the mgm compro but cost about 1000 euro.

I also found a company that can make me custom board, so the next step is a board about 80cm width and almost flat, no rocker line.



This box can fit inside and out a custom board, so easy to install and no leaking. So you don't have to work inside a board or make the board waterproof.

Maybe I will sell this whole set up if anyone is interessted.
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Re: Electric Surf Board

Postby Gege2000 » Mon May 15, 2017 12:58 pm

msk8 wrote:Hi fellow efoil builders, here an update on my design thoughts and prototyping progress. Here a list of the components I will be using: https://www.dropbox.com/s/d31ti8819uahm ... .xlsx?dl=0. Looking forward to hearing your thoughts.


Hi msk8, you are doing an awesome job, thank you for your vids, can't wait to see the results! :D :D :D
It's maybe possible to make a closed circuit with a little tank and a radiator for the water of the ESC, it will be more simple than tubes in the mast.

Have you think about the voltage? What is the pitch of the propeller? I think you must be able to go at 25km/h to be good. Have you made little calculations (with the sliding in the water, and so on)?

Best regards,
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Re: Electric Surf Board

Postby mr.electric » Tue May 16, 2017 2:35 am

This is really bad ass. I want one.
-Fat Sand Bike with 9c and 29ah pack

-Giants mascot scooter
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Re: Electric Surf Board

Postby Frizzo » Mon May 22, 2017 10:56 am

Bazaki wrote:Hey Guys,

No secrets here anymore.

Months I have thought to set up my own company with an electric jet surf, so I could not really share my details.
But I'm doing other things lately and the jetsurf is just standing here. So I want to share all details now.

I found out the exact details of the Lampuga jetsurf.

Lehner motor 7040/6 about 1000 euro
MHZ jetdrive 64mm about 650 euro
Mgm compro ESC ( 25063 ) I think it was their industrial ESC not the hobby esc. about 1000 euro
14s lipo

I bought the same motor and jet drive, very expensive. and bought the cheap flier waterproof 420a esc.
First I bought the swordfish 300a + but gave only 50% throttle, never worked well.

Here is the old video:



The board is a surfboard with too much rocker and the board is too small. Also I had some water leaking in.

Now I made a plexi glass box, so I can test it at home under water and everything is 100% waterproof, even the lid that is on top. Works perfectly dry.
Watercooling is running good, and I use 14s lipo, the motor runs 320rpm kv unloaded and with load 280 rpm kv. So that is about 15.000 rpm for the jet.

It is not as with an ebike, with this you need 11kw continiously, so the efficienty needs to be as high as possible, everything needs to match perfectly.

At 55kv it takes about 200A and everything stays pretty cold, but somehow I burned 2x a Flier 420A esc. I'm also not sure why the esc broke, it was running fine under load, cut off throttle and it didn't work. Now I wanted to invest in the mgm compro but cost about 1000 euro.

I also found a company that can make me custom board, so the next step is a board about 80cm width and almost flat, no rocker line.



This box can fit inside and out a custom board, so easy to install and no leaking. So you don't have to work inside a board or make the board waterproof.

Maybe I will sell this whole set up if anyone is interessted.


Hi Everyone 1st of all. :)

Bazaki, for how many minutes can you surf with your configuration? I´m looking to build a surfjet with the same configuration and am wondering what I need for like 20 min of fun :)
Ps. What is about the 3D printed version of the jet pump? How much thrust can you generate from one of those?
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Re: Electric Surf Board

Postby fabianpusch » Tue May 23, 2017 10:47 am

Hi at all

I have nearly the same setup.
As battery I have used a 16S4P 38140SE Headway configuration and at the moment I am using a 16S1P LiPo from Kokam with crazy 53Ah. The Headway setup was really stable lets say idiot safe but a little heavy.
Cruising time about 25-30 minutes. It is a 48 Ah configuration. Now with the Kokam it should be around 35-40 minutes.
As motor I use also a Lehner and I use the MGM Compro the so called industrial version.
I can post the specs of the controller.

By the way, I am using an Emus BMS with the small cell modules.

The board is fully made of carbon.
If someone is interested, the Headway cells will ne sold for a cheap prize.

Have a nice evening
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