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  1. C

    Electric Surf Board

    hydraulic throttle, sounds cool, what components are you using? might have to add that
  2. C

    Electric Surf Board

    if anyones interested in a build video, https://www.youtube.com/watch?v=p6V4zLt6Xys
  3. C

    Electric Surf Board

    awesome. which model did you get? new or second hand? how is it to ride?
  4. C

    Electric Surf Board

    look at that giant external caps bank on the mgm esc. when my caps kept blowing, mgm were telling me "its your batteries, its your motor, its everything except the ESC", and charging me stupid amounts of money to repair and replace. turns out lampuga also had problems with the caps exploding...
  5. C

    Electric Surf Board

    drawings sent
  6. C

    Electric Surf Board

    hi fabian. sorry mate, ive been real busy with work etc the last week. ill see if i can get it to you by tomorrow
  7. C

    Electric Surf Board

    no probs. what format is good for you? ill find the drawings and compile them together for you over the weekend
  8. C

    Electric Surf Board

    tbh my skill with CFD is basic/beginner, i can do a simulation on something simple like a tube, or a fin, but to do an entire jetpump, with moving parts etc is well beyond me. to design my pump i used simple 2d calculations for torque, flow volume, inertia etc. which gave me perfect thrust and...
  9. C

    Electric Surf Board

    thanks fabian. feels good to finally have a working board. sure, what would you like to know?
  10. C

    Electric Surf Board

    hi guys i made a full video, jetsurfing at the beach. https://www.youtube.com/watch?v=hpW3-ppHwgc&t=2s
  11. C

    Electric Surf Board

    great thanks, i will try them.
  12. C

    Electric Surf Board

    i can cnc the crank case, but the cylinder/block has exhaust/transfer ports that can only be achieved with either wax loss casting, or dmls. i got some parts quoted dmls a few years ago for my company, was cheaper back then to wax loss cast, but both were extremely expensive. i was wondering if...
  13. C

    Electric Surf Board

    hi fabian what dmls machines do you have? im curious how much it would cost to laser sinter me a 2 stroke engine block/cylinder in aluminium. p.s. did you try adjusting your motor timing
  14. C

    Electric Surf Board

    lehner 7050 with 5 windings 76mm prop with 70mm pitch, 52mm nozzle
  15. C

    Electric Surf Board

    yeah 2 thousand euros is a little on the pricey side
  16. C

    Electric Surf Board

    i was running 20 degrees, and the fets were getting close to max temp, then i increased to 25 degrees, and the fets were cooler by about 8 degrees. im running cooling from the jet drive, but it pumps a lot of water through the system through 10 mm diameter hose fets are stable around 60 degress c
  17. C

    Electric Surf Board

    yeah, check the waterflow, the fets on mine never get hot, also what motor timing are you using? more degrees timing keeps the fets cooler, but gets the battery and motor a little hotter. how much did that battery cost, looks like the proper shiz
  18. C

    Electric Surf Board

    i have watercooling plates on the batteries, ill take a photo tomorrow. and the external caps bank just lays between the cooling plates. thats strange that the fets are overheating, how much water are pumping through the mgm cooling plate? i never had a problem with the fets getting hot
  19. C

    Electric Surf Board

    so you were running a 17p battery? assuming your cells were 3000mah?
  20. C

    Electric Surf Board

    what part of your mgm was getting hot? the fets or the caps? i was having problems with my caps, so i put a huge capacitor bank with watercooling on them and that seemed to solve it. in the end i was having problems with my batteries getting hot, especially if i full throttle to 54 kmph, and...
  21. C

    Electric Surf Board

    that looks awesome, really smooth! how much run time do you get per charge? what size battery were you using?
  22. C

    Electric Surf Board

    hit 75 kmph yesterday! heres a video doing not quite full speed around 65kmph https://youtu.be/BENxS1iLGjk
  23. C

    Electric Surf Board

    hi florian thats cool. would you be willing to post some photos of the lampuga boards internals, like the esc motor, wire lengths, battery, jetpump, heat exchangers etc would be very interesting to see exactly how they overcame some of the problems
  24. C

    Electric Surf Board

    heres a photo of my hatch, aluminium flange, with a rubber gasket, and thumb nuts for fastening it down
  25. C

    Electric Surf Board

    ill post a photo tomorrow of what i did with my hatches. basically i just had a rubber gasket cut for me by a company who cnc cuts gaskets for plumbing and oil industry etc 60mm pitch is a little low, especially for a 60mm diameter prop, you would need to get that nozzle pretty small to create...
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