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:
[youtube]berdYSLwSRA[/youtube]
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.
[youtube]DAblu6x7i80[/youtube]
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.