Search found 22 matches

by Matthias_S
Aug 10 2014 12:14am
Forum: Electric Watercraft
Topic: Electric Surf Board
Replies: 681
Views: 166511

Re: Electric Surf Board

The torqeedo prop is desingned to work at 1300rpm most efficient so i choose the gear reduction a little higher to get around 1500rpm. I'm not sure what the trust is but it feels like 30 kg. i dont know why i cant get more trust :( at full speed the multimeter shows me 4kw of power consumption. I do...
by Matthias_S
Aug 09 2014 3:46pm
Forum: Electric Watercraft
Topic: Electric Surf Board
Replies: 681
Views: 166511

Re: Electric Surf Board

when i started this project i also made some tests whit direct drive propulsion. i mounted a standard trolling propeller to the 80-100, sealed everything in a aluminum tube and taped it on a surfboard. the result was 3 burned turnigy 150A HV controller. But also whit my kelly controller the trust wa...
by Matthias_S
May 21 2014 2:23am
Forum: Electric Watercraft
Topic: Electric Surf Board
Replies: 681
Views: 166511

Re: Electric Surf Board

Finished my project...


by Matthias_S
Jan 02 2013 6:01am
Forum: E-Bike Non-hub Motor Drives
Topic: Crankless RC BB motor
Replies: 3
Views: 730

Re: Crankless RC BB motor

Yes thats right its a neugart plantetary gear (16:1). The hole electronic is hidden in the frame. There is only one plug coming out of the frame to conect it with the battery.
by Matthias_S
Jan 02 2013 5:56am
Forum: E-Bike Non-hub Motor Drives
Topic: Crankless RC BB motor
Replies: 3
Views: 730

Re: Crankless RC BB motor

Hello sk8norcal,
This one is also mine :wink:
by Matthias_S
Aug 05 2012 1:05pm
Forum: Electric Watercraft
Topic: Electric Surf Board
Replies: 681
Views: 166511

Re: Electric Surf Board

kymera is absolutely amazing :D
I hope so much to get similar results
by Matthias_S
Aug 05 2012 6:05am
Forum: Electric Watercraft
Topic: Electric Surf Board
Replies: 681
Views: 166511

Re: Electric Surf Board

by Matthias_S
Aug 04 2012 6:19pm
Forum: Electric Watercraft
Topic: Electric Surf Board
Replies: 681
Views: 166511

Re: Electric Surf Board

There is a lot of potential in hydrofoil but whit my jet pump it is not so easy to realize this.
There is already an electric hydrofoil out there..
http://www.youtube.com/watch?v=jh_RhkejWLw&pxtry=1
by Matthias_S
Aug 02 2012 6:30pm
Forum: Electric Watercraft
Topic: Electric Surf Board
Replies: 681
Views: 166511

Re: Electric Surf Board

Some guy that supposedly know his stuff said that you will get 1hp out of the pump for every 1kw you put in. I don't know if that is spot on, but may be. The kawaski 550 have 37hp stock and put out 360lbs of thrust. If we divide the thrust produced by motor hp we get 9.2 lbs of thrust per hp. Maybe...
by Matthias_S
Aug 02 2012 7:52am
Forum: Electric Watercraft
Topic: Electric Surf Board
Replies: 681
Views: 166511

Re: Electric Surf Board

I bought a kawasaki 550 jetpump. I will test how much trust I get with one turnigy 80-100.
My goal is to reach planing speed. Dont know how much trust I need to reach it? I think more than 200lbs..?

Does anyone know how much trust a kawasaki 550 produce?
by Matthias_S
Jul 30 2012 5:16pm
Forum: Electric Watercraft
Topic: Electric Surf Board
Replies: 681
Views: 166511

Re: Electric Surf Board

The jet pump dosn´t produce enought trust.. I will get one of this kawasaki pumps and hope to get more trust.

One of my fist electric boards:
http://www.youtube.com/watch?v=s9PRm23j ... e=youtu.be
by Matthias_S
Jul 26 2012 3:52pm
Forum: Electric Watercraft
Topic: Electric Surf Board
Replies: 681
Views: 166511

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$ :(
by Matthias_S
Jul 26 2012 3:41pm
Forum: Electric Watercraft
Topic: Electric Surf Board
Replies: 681
Views: 166511

Re: Electric Surf Board

I couldnt test it.. still working on the surfboard.. here some progress pictures.
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by Matthias_S
Jul 25 2012 10:03am
Forum: Electric Watercraft
Topic: Electric Surf Board
Replies: 681
Views: 166511

Re: Electric Surf Board

I´m going to test it today...
by Matthias_S
Jul 23 2012 4:11pm
Forum: Electric Watercraft
Topic: Electric Surf Board
Replies: 681
Views: 166511

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 K800_IMAG0296.JPG Ratking: Do you h...
by Matthias_S
Jul 23 2012 6:13am
Forum: Electric Watercraft
Topic: Electric Surf Board
Replies: 681
Views: 166511

Re: Electric Surf Board

some progress whit the housing.. yes its a tool box but i cant find any better housing :roll:
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by Matthias_S
Jul 23 2012 4:17am
Forum: Electric Watercraft
Topic: Electric Surf Board
Replies: 681
Views: 166511

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:
K800_IMAG0411.JPG
K800_IMAG0411.JPG (133.35 KiB) Viewed 10147 times
but the result (in teh video) is not so good..
by Matthias_S
Jul 22 2012 4:10pm
Forum: Electric Watercraft
Topic: Electric Surf Board
Replies: 681
Views: 166511

Re: Electric Surf Board

hi gestalt,

I havent got any heat problems because the motor mount is cooled directly by the water :D
by Matthias_S
Jul 22 2012 4:06pm
Forum: Electric Watercraft
Topic: Electric Surf Board
Replies: 681
Views: 166511

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?!
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by Matthias_S
Jul 22 2012 3:55pm
Forum: Electric Watercraft
Topic: Electric Surf Board
Replies: 681
Views: 166511

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
by Matthias_S
Jul 22 2012 3:34pm
Forum: Electric Watercraft
Topic: Electric Surf Board
Replies: 681
Views: 166511

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.
K800_IMG_20120716_144137.JPG
The impeller
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the inlet
K800_IMG_20120716_150204.JPG (60.6 KiB) Viewed 46347 times
by Matthias_S
Jul 22 2012 2:59pm
Forum: Electric Watercraft
Topic: Electric Surf Board
Replies: 681
Views: 166511

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

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