mr.electric
10 kW
agreed great carbon work
msk8 said: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/d31ti8819uahmyv/List%20of%20Materials.xlsx?dl=0. Looking forward to hearing your thoughts:
dirkdiggler said: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
msk8 said: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/d31ti8819uahmyv/List%20of%20Materials.xlsx?dl=0. Looking forward to hearing your thoughts.
Bazaki said: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.
Jezza said:Looking at eFr3ak numbers from when he submitted his component list:
Performance:
Max Power: 9.8 kW (205 A @ 46.7 V)
Max Speed: ca. 44 km/h (probably higher as max throttle was never applied for a longer time than 2s)
Max RPM (prop) : 6800 rpm
Planning speed: ca. 20-25 km/h
Power @ planning speed: ca. 3.2 kW
One can get a rough idea of what may work. For an efficient foil, you can generate lift at around 4-8mph depending on rider weight.
With the same components you could then guesstimate that to generate lift you need around 1.6kW of power.
The most frustrating part of this build is picking the correct gearbox!! They are insanely expensive and not very easy to find within the required specs.
Through my browsing and research I have come some other solutions with less powerful motors (more for just cruising):
The scubajet: https://shop.scubajet.com/
Vorta power system: http://www.vortapowersystems.com/Vorta-DX3-Electric-marine-motor.html
Electrafin: https://www.currentdrives.com/products/electrafin
Epropulsion Lagoon: http://www.epropulsion.com/lagoon
hardwiring said:We need an efoil thread... it's made an old lurker like me come over from the darkside (that skateboard forum) and join, hi from the UK BTW
The things I am researching so far....
Is a gearbox essential?
Will starting with a foamy then structuring wood as required, finally glassing the cojones out it be a viable option for a usable board?
Should I wait a year and see whats inside the lift and jetfoiler boards?
Will this rash go away on its own?
Will 12s be sufficient?
Who will copyright FESC?
Will I finish this Emountain board or move to the sea before I finish?
BTW @msk8 you are my hero, keep us informed when that motor arrives, thanks for your work and sharing, my printer is slaving away night and day ATM and soon I hope to be following your lead
Frizzo said:Bazaki said: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.
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?
Bazaki said:https://endless-sphere.com/forums/viewtopic.php?f=9&t=88790&p=1294823#p1294823
If someone wants a good jet drive for a surfboard, Im selling mine