For such a high price - a nice design, high quality material, yet average efficiency. The solution exists: help find the manufacturer of impellers in China and I create high-performance impellers for all categories of e-foil!
I have mills, CNC and 3D printers. if you create a design, I can build it and test it.
1 Like
Same here. Why not make a prop for 4000RPM that we can all use?
There’s prices are fu#king outrageous, same motors on Alibaba for half the price including shipping to Jupiter or mars !
Has anyone good experience with java prop ? I need a design for a impeller ? I haven’t a clue what I’m doing
1 Like
David, I used JavaProp for our propellers, but we moved to Impellers for various reasons.
Check out this impeller software, hope it helps!
Here is a recent photo of my impeller drive and floating waterproof remote control
5 Likes
the inlet ducts look like they could be a possible hazard for fingers and toes, maybe mesh ?
The impeller is tucked way back in there but ya, we are test with intake and will add more protection and see what type of flow/thrust we lose each step of the way as we protect it more and more with grills. Thanks DavidC!
It looks awesome. Whats up with the foil? Why did you make it so long (front to back) instead of making it wider (left to right)? Just wondering about your thought process.
Hey thanks Max!
We don’t make foils, this is off the shelf. Photo angle may be deceiving, its the same length as our Liquid force foil fish, just the wings are larger deeper and Wider for more lift/stability at slower speed. Its an SUP foil Max.
Keep up the great work on your end also, you got lots of great things going on its looking really good!
1 Like
Have you ridden this setup (or any of the others) yet or is it still in the testing phase?
We have not ridden this particular setup yet but within a couple weeks will be up and out! We rode reduction gear setup but thats not the direction we wanted to build as its pickled with extra parts, costs and issues in our opinion 
2 Likes
hi~
I started making jet surfers two years ago.
Neither belt type nor chain type could stand.
The gear was the most durable.
That’s wicked!
Its so awesome to see everyone’s designs and ways to create things! Keep up the great work Sungmok!
Difficult Setup. These motors for sure do not run exactly same speed. Did you Monitor the current on each motor? In such setup it is good to have the motors connected with one way clutch to prevent they are working against each other.
Agreed, if you order two motors with same KV they are NEVER the exact same, if one china man puts one more wind or 10 more on a motor it will be different and two motors will definitely be fighting. I full agree you can get little one way clutches which would resolve most of the issue, and the one motor doing most of the work starts to get bogged down the other motor will be there to support and add torque to bring RPM back up.
I dont agree. If you miss one winding the motor is scrap, because of small number of windings. If there is no load, it could happen that one motor does not contribute anything, but hey, this should not damage anything. The ESCs could cause much more load difference than the motors. The windings seem ok to me. This damage looks more like a thermal and RPM overload of the rotor, but who knows?
2 Likes
do you use this type of coupler for the impeller? looks like flex, the impeller does not touch ?
Yes, the one in the photo is a flex coupler but we have NON flex couplers for shaft during operation.
2 Likes