Electric Surf Board
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- Posts: 22
- Joined: Jul 22 2012 1:10pm
Electric Surf Board
Hi,
I´m working on a electric surfboard similar the jet-surf board and made some progress whit my jet unit.
Motor: Turnigy 80-100 (rewound)
Controller: Kelly Controller
I´m working on a electric surfboard similar the jet-surf board and made some progress whit my jet unit.
Motor: Turnigy 80-100 (rewound)
Controller: Kelly Controller
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Last edited by Matthias_S on Jul 23 2012 6:41am, edited 2 times in total.
- Jeremy Harris 10 GW
- Posts: 4208
- Joined: Oct 23 2007 4:15pm
- Location: Salisbury, UK
Re: Electric Surf Board
Looks interesting!
I'll be very interested to see what sort of performance and efficiency you get from this, and would love to know more about the impeller and duct design.
I'm seriously thinking about making a bow thruster for my small river boat, using a jet unit.
I'll be very interested to see what sort of performance and efficiency you get from this, and would love to know more about the impeller and duct design.
I'm seriously thinking about making a bow thruster for my small river boat, using a jet unit.
Please ask questions on the forum, rather than by PM, as it helps others and you'll get a better range of answers.
Re: Electric Surf Board
Cool project, keep us posted.
My ebike projects and links
http://www.endless-sphere.com/forums/vi ... 11#p318811
Smart Switch
http://www.endless-sphere.com/forums/vi ... 23#p465323
Dewalt interface board
http://endless-sphere.com/forums/viewto ... 14&t=10986
My website http://www.embeddedtronics.com/
RC blog http://www.rcgroups.com/forums/member.php?u=23712
http://www.endless-sphere.com/forums/vi ... 11#p318811
Smart Switch
http://www.endless-sphere.com/forums/vi ... 23#p465323
Dewalt interface board
http://endless-sphere.com/forums/viewto ... 14&t=10986
My website http://www.embeddedtronics.com/
RC blog http://www.rcgroups.com/forums/member.php?u=23712
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- Posts: 22
- Joined: Jul 22 2012 1:10pm
Re: Electric Surf Board
Some more details:
- 50 V
- at full trottle 50A (on battery side) is this 2,5kw of motor power??
- diameter 70mm
I will post a video soon.
- 50 V
- at full trottle 50A (on battery side) is this 2,5kw of motor power??
- diameter 70mm
I will post a video soon.
Last edited by Matthias_S on Jul 23 2012 6:49am, edited 1 time in total.
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- Posts: 22
- Joined: Jul 22 2012 1:10pm
Re: Electric Surf Board
Here is the Test video
I´m working on the outlet because im not happy with the beam.I dont knwo how to get it tight and straight??
http://www.youtube.com/watch?v=R-n-O7-S ... e=youtu.be
I´m working on the outlet because im not happy with the beam.I dont knwo how to get it tight and straight??
http://www.youtube.com/watch?v=R-n-O7-S ... e=youtu.be
Re: Electric Surf Board
Boy o Boy ! That picture made me happy, that is really looking good, a 55 kv wound for the c80100 ?
I wonder how the rest of your setup and plan will look like and I hope the board will get to a high planing speed without heating issues
Please share as much info as you can !
I wonder how the rest of your setup and plan will look like and I hope the board will get to a high planing speed without heating issues

Please share as much info as you can !
Re: Electric Surf Board
I've seen how they use a bit of the water run off the impeller to cool the engine on a jetski. couldn't you do something like that to cool the motor and controller?
- be seeing you


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- Posts: 22
- Joined: Jul 22 2012 1:10pm
Re: Electric Surf Board
It is the C80-100 double wound whit 6 turns of 1,5mm copper wire
I wound it to 200rpm/v... I think so?!
I wound it to 200rpm/v... I think so?!
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- Posts: 22
- Joined: Jul 22 2012 1:10pm
Re: Electric Surf Board
hi gestalt,
I havent got any heat problems because the motor mount is cooled directly by the water
I havent got any heat problems because the motor mount is cooled directly by the water

Re: Electric Surf Board
Hello
Cool idea you have
, hope you get it to work.
To get most out of the system and produce a straight beam you will need a nozzle and a stator that redirect the water and keep a high pump pressure. I don't know the exact science behind it, but know that a system without will suffer greatly without it.
Cool idea you have

To get most out of the system and produce a straight beam you will need a nozzle and a stator that redirect the water and keep a high pump pressure. I don't know the exact science behind it, but know that a system without will suffer greatly without it.
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- Posts: 22
- Joined: Jul 22 2012 1:10pm
Re: Electric Surf Board
Hello Ratking,
my first test was whitout stator an des beam was really distracted.. then i testet it whit this stator:
but the result (in teh video) is not so good..
my first test was whitout stator an des beam was really distracted.. then i testet it whit this stator:
but the result (in teh video) is not so good..
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- Posts: 22
- Joined: Jul 22 2012 1:10pm
Re: Electric Surf Board
some progress whit the housing.. yes its a tool box but i cant find any better housing

Re: Electric Surf Board
Hello
I won't try to discourage your idea, but I would have started with a Kawasaki 550 jet ski pump. They are cheap and one of the smallest pumps out there.
The i.c motor that powers the pump originally has 31hp but has fairly low torque. I would have started with a pump I knew was up to the task such as this and shaved of every gram of unnecessary aluminum. It could really launch your board away. I would also have looked into one main axle with two 80-100 motors after each other if you really wanted to be close to the performance of the kawasaki 550 jet.
If you want to stick with your design, I think you will have a long way to go before you will see high efficiency from it. You could learn heaps of interesting tech from it though
I won't try to discourage your idea, but I would have started with a Kawasaki 550 jet ski pump. They are cheap and one of the smallest pumps out there.
The i.c motor that powers the pump originally has 31hp but has fairly low torque. I would have started with a pump I knew was up to the task such as this and shaved of every gram of unnecessary aluminum. It could really launch your board away. I would also have looked into one main axle with two 80-100 motors after each other if you really wanted to be close to the performance of the kawasaki 550 jet.
If you want to stick with your design, I think you will have a long way to go before you will see high efficiency from it. You could learn heaps of interesting tech from it though

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- mr.electric 10 kW
- Posts: 748
- Joined: Jan 03 2007 12:12pm
- Location: San Francisco
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Re: Electric Surf Board
Cool project! I just helped a friend combine two dead Kawasaki jet skis into one working jet ski. I ended up pulling the jet pump off the bad motor ski and installing it onto the ski with a frozen pump. I was impressed with jet ski technology. Now a few weeks later I have been dreaming of a jet ski that is legal to launch from the beach in San Francisco were I live. The closet thing would probably only be an electric jet powered surf board.
Looking forward to seeing it come together.
Nice work so far keep at it and you will be on the water soon.
Looking forward to seeing it come together.
Nice work so far keep at it and you will be on the water soon.
-Fat Sand Bike with 9c and 29ah pack
-Giants mascot scooter
-Giants mascot scooter
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Re: Electric Surf Board
Hello,
maby I will use one of this jet pumps in the future but first I hope to get this thing running.I also worked on a prop driven surfboard but there was no way to get planning speed begause of the friction caused by the motor.. so I desided to build a jet pump
Ratking: Do you have detail photos from the nozzle?
maby I will use one of this jet pumps in the future but first I hope to get this thing running.I also worked on a prop driven surfboard but there was no way to get planning speed begause of the friction caused by the motor.. so I desided to build a jet pump
Ratking: Do you have detail photos from the nozzle?
Re: Electric Surf Board
Cool project!
What is your plan on watersealing?
What is your plan on watersealing?
- mr.electric 10 kW
- Posts: 748
- Joined: Jan 03 2007 12:12pm
- Location: San Francisco
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Re: Electric Surf Board
I want to build one too!
I'm going to wait until you get one going to hear how it rides. Alternatively I could do a kayak, Anything you can launch from the beach in CA legally.
Would a prop just be too dangerous?
I'm going to wait until you get one going to hear how it rides. Alternatively I could do a kayak, Anything you can launch from the beach in CA legally.
Would a prop just be too dangerous?
-Fat Sand Bike with 9c and 29ah pack
-Giants mascot scooter
-Giants mascot scooter
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Re: Electric Surf Board
I´m going to test it today...
Re: Electric Surf Board
And....how did it go ?
- bzhwindtalker 1 MW
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- Location: Lyon, France
Re: Electric Surf Board
Your water turbine looks amazing!
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- Joined: Jul 22 2012 1:10pm
Re: Electric Surf Board
I couldnt test it.. still working on the surfboard.. here some progress pictures.
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- Joined: Jul 22 2012 1:10pm
Re: Electric Surf Board
at Ratking:
I´m really interested in testing one off this kawasaki 550 jet pumps! Also I will get alot more trust than now because mine only needs 55A to run at full trottle..
But my problem is where to get one? In germany I couldnt find one and shipping from the usa costs about 80$
I´m really interested in testing one off this kawasaki 550 jet pumps! Also I will get alot more trust than now because mine only needs 55A to run at full trottle..
But my problem is where to get one? In germany I couldnt find one and shipping from the usa costs about 80$

Re: Electric Surf Board
I really hope you will get this project to work, if it will run fine I need copy/paste it so please share all the info with us 

Re: Electric Surf Board
HelloMatthias_S wrote:at Ratking:
I´m really interested in testing one off this kawasaki 550 jet pumps! Also I will get alot more trust than now because mine only needs 55A to run at full trottle..
But my problem is where to get one? In germany I couldnt find one and shipping from the usa costs about 80$
I am afraid that you just have to accept the high shipping price. Ebay.com, pwctoday.com and x-h2o.com is some great sites to get a cheap pump. Ebay is maybe not the cheapest, but you got a bit of security with it.
I know there are a couple of guys that tried to make a stand up jet ski with electric motor, but without any success. High performance water jets require big power, one of the upsides is easy cooling of the motor, controller and that the controller have a very easy life.
Do you want to sink any money in to this project or is it a cheap try?
In any case, you will have to use an impeller with the right pitch according to motor power and your speed goal.
If you are lucky, there are some very good deals to do at some of the forums I linked to.
Good luck with your project, I really hope you make it
Re: Electric Surf Board
Hello again
Heres a good deal on a 300sx pump: http://www.x-h2o.com/showthread.php?116 ... 00sx-parts
Its only 50 bucks, but you should check if the impeller and misc parts are included.
Are there any progress?
Heres a good deal on a 300sx pump: http://www.x-h2o.com/showthread.php?116 ... 00sx-parts
Its only 50 bucks, but you should check if the impeller and misc parts are included.
Are there any progress?