More info on your dock board and pump setup please. Custom board? Looks short. 130 cm?
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of course it’s custom. you have a complete thread build here from scratch.
Took the opportunity to launch a 45L surf foil board to complement my existing 35L surf foil
Sorry. Maybe we are lost in translation.
I mean this board and setup:
Cheers! Nice tow boogie build!
Maiden today. I’ve added the angle riser… but wrong position. I’ll try it again next time. This thing is powerful !
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Happy to hear that you got things in the water today. Congrats!!
I’m eager to water tank test my motor which is the same as yours and from what I can tell from the very short dry spins on the bench I did I share your opinion on its lots of motor!!
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Did you have a successful tow? Last year I spent a lot of time making the body of the board. As a result, nothing happened due to the large torque and the obstruction of the board to the starboard side. So this year I focused on motors)
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That’s awesome - are they twin 6384 outrunners?
awesome OKP !!!
good luck for the first water real life tests !!!
Yes, these are cheap 120 kV motors and two BDLC 200A controllers.
excellent brother !
so I did the maiden; although I’ve put the motor very much in the middle of the board… I failed for two reasons:
- I put the angle riser the wrong side… which made the tow… act like a speed boat !!! /me stupid.
- the 1) item does not help at all to counter the torque effect from the motor.
I’m going to add two floating parts like a “catamaran” on the rear of the board. They will be custom made and I’ll use two US BOX (one on each part) so I can move the floaters freely and ultimately adjust the behavior. a 14mm carbon tube will be attached on the USBOXes that are located on my board.
When it’s cured, I’ll shape them and then epoxy / CF the floater to make them rock solid.
I got four of these devices. Good thing is that they are M6 so it will be a direct fit on the USBOXes!
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I assume the board is pushing the nose up high? Two reasons for this:
- the tow rope is in the incorrect place. It acts as a pivot point and should come from under the board instead. Look at FR’s tow motor design.
- The prop is also too far back. That’s where the push is coming from.
I think you should install can holders in the outriggers that are water cooled for post ride refreshment!! 
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Amusing to see the floaters. I tried a side float to resist torque on my very first build with a small youth boogie board, but it wasn’t a solution. Having a side float stops it from tracking straight, and it’s fragile/bulky/awkward. A skinny board makes for a tippy upside down tow boogie.
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thanks brother; floaters are the very first solution that came to my mine. I’ll go first for the side float. It’s an easy and adjustable fit using two carbon 14mm tubes and attachement directly on the USBOX rails. I’l also try to move the cable below the board and that will help for sure in the board going nose up high.
I’m going for 60cm carbon tubes.
@Foilguy that would be a good idea !!!
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Your statement that two motors are heavier than one has disappeared somewhere. The weight of one FS65161 is 3 kilograms, the weight of two 6384 is 1.9 kilograms. Maintenance - pull off the rotor, spray corrosion X. Service 65161 - unscrew 6 screws, remove the seal at the risk of damaging the o-ring, replace the rusty bearing)
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How are you finding the dual motor build?
The assembly is very simple. The most difficult part was replacing the bullets in the quick-release connectors.
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here we go. If it works, I’ll need to secure the tubes. the tighteners are 15mm and my tube is 14mm… I added some rubber but not sure it will do the deal. Maybe a 3D printed part to mind the gap would work but it will have to be chirurgical… 1mm thickness (max)
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An interesting solution, of the minuses is a significant increase in size. I planned on my first tow boogie to make something like a wing on a mast with blades directed at different angles.