Electric Mini Jetboat Build, Part 3

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  • เผยแพร่เมื่อ 30 ก.ย. 2024
  • Finally get into a small creek to test drive, after a lot of problems.
    Get the 3d print files www.cgtrader.c...
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ความคิดเห็น • 192

  • @DktheWelder
    @DktheWelder  ปีที่แล้ว +3

    Thanks for all the comments guys I will go through and answer them all soon 👍

    • @kodywattus4648
      @kodywattus4648 ปีที่แล้ว

      Just put a 2 stroke in it and be done with it

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      @@kodywattus4648 just like every other jet boat haha

    • @kodywattus4648
      @kodywattus4648 ปีที่แล้ว

      @@DktheWelder rotary…

    • @SpaceMulva
      @SpaceMulva ปีที่แล้ว

      Why are you putting your controllers in a place that gets wet? Are you being intentionally obtuse?

    • @kiwi_welltraveled4375
      @kiwi_welltraveled4375 ปีที่แล้ว

      @@SpaceMulva
      Intentionally obtuse, would be the person calling the person who's actually doing a mahi, intentionally obtuse..........
      Kia Kaha Daniel
      😀👍

  • @00000005547
    @00000005547 ปีที่แล้ว +19

    I got a couple suggestions if you care:
    1. You need to waterproof those ESC's, or at least enough so that a water drop won't kill them. You can do this by cleaning them with alcohol, drying, then spraying a couple coats of clear coat/laquer or whatever paint. Spray flex tape should work too, but I find that clear coat works great and looks great too. Try not to spray over the heatsinks as that will decrease their cooling abilities.
    2. In order to properly prop your boat you have to calculate the max RPM of the motors (basically the motors kV rating x your battery voltage), and see what RPM they can run at max. At full throttle, you want them to be at around 70% of that RPM. If they cant spin that fast, you're overpropped. This means that your motors will be drawing way too many amps too quickly and run super inefficient. Think taking off on a manual car in 2nd gear. This may be why your ESC's cut out, but it might also have been due to a water droplet or something going around.
    This also goes hand in hand with power consumption. So your motors are 160kv, your batteries 48v, so assuming ~7600rpm nominal. I would try to aim for ~6k rpm loaded full throttle, at which point they should be consuming no more than 7kw per your motors specifications. Just reading these numbers makes me think your motors are too low a kv for what you're trying to do. Most brushless motor setups on RC boats aim for 20k rpm+. I guess you could try to offset it by using a bigger jet then decreasing the nozzle size, but at that point I'm just guessing off the top of my head. I don't think adding another impeller is going to do much, unless the pitch is higher.
    Think of it this way, if your impeller displacement is 2 inches per revolution and you're spinning at 6krpm (100rps) it will push a maximum of 200 inches per second, now obviously this is never going to be the case because of slip, but this gives you an outgoing jet of ~16 feet per second, which is like 11mph or 17kmh.
    While this sounds like it would be a great speed for the boat, this jet speed only determines the maximum speed with zero drag and an infinitely long time to accelerate.
    This basically brings us into rocket science territory where we have to use mass flow rate and output velocity to determine thrust. Long story short, to increase thrust you need to do one or both of the following: increase mass flow, or increase output velocity. Increasing mass flow is always more efficient than increasing output velocity (for example, increasing your impeller diameter to increase the amount of water moved while keeping the same pitch, vs increasing pitch to increase output velocity).
    In your case I would recommend to get a DC current clamp meter, they go for maybe $30 on amazon. At full throttle measure the current consumption x voltage (48v) and top speed. If below ~7kw, increase pitch. If it consumes more but you don't get much more top speed, unfortunately you might have to increase the size of the jet pumps. Because while increasing pitch does increase output, there is a point where too much pitch increases friction too much and you're basically pushing the water to the outside of the pipe instead of backwards.

    • @nfg_fpv
      @nfg_fpv ปีที่แล้ว +2

      yea definitely but I would recommend using silicone conformal coating over lacquer, it more designed for this purpose and depending on how hot the ESCs get it could be an isue for some clear coats and laquer.

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว +2

      Wow that is a comment! I will read through it a few times then get back to you👍

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      Ok clear coat the esc s . Yeah the rpm is low but a v8 jetboat is low also I do have a 100mm jet unit I made I could try. But a lot of extra work, I can make a longer impeller that the pitch increases along it , otherwise a 2 stage has the second stage way more aggressive pitch. Thanks for the in depth comment!

    • @BIGWIGGLE223
      @BIGWIGGLE223 ปีที่แล้ว

      Yeah. What ☝️ said. That's a guy you should listen to.

    • @snikwahjets
      @snikwahjets ปีที่แล้ว

      Yeah, great suggestions.
      The jetboat needs more thrust to accelerate faster. But not more jet velocity. The motors seem to have more power in them, so you could try increasing the pitch.
      Or better yet, scale everything up. ie bigger impeller and nozzle
      There is also a lot or swirl coming out the outlet, so improving the stator design will help heaps!
      Design the stator blades to start at about 45° then gradually curve them to straight. You don't need a long straight section. I found 7-8 blades more effiecent than 6.
      I have a 53mm impell 6hp jetpump that output 20-24kg thrust 60kph jet velocity it was no good wake boarding.
      Double the thrust and half the jet velocity would be more suited

  • @Stjarna_Svinsdottir
    @Stjarna_Svinsdottir ปีที่แล้ว +11

    You need marine ESCs. They're waterproof and water cooled. Should have reverse, too.

    • @jeroenjager
      @jeroenjager ปีที่แล้ว

      Yeah! Ask Maytech if they will sponsor your project!

    • @maxnankervis8246
      @maxnankervis8246 ปีที่แล้ว

      However, Jetboats dont really work in reverse like a prop boat does.

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว +1

      That would be good but that’s not what I have

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      @@jeroenjager yes haha, I need more views first

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      @@maxnankervis8246 I have a bucket for reverse. I want it to go reverse so it will unwind all the weeds off the shaft

  • @airgunningyup
    @airgunningyup ปีที่แล้ว +2

    reversing on a brushless motor is swapping 2 of the phase wires as i recall. so a switch could be wired in for reverse. Im surprised the controllers dont have a reverse.

    • @quinnobi42
      @quinnobi42 ปีที่แล้ว +2

      Based on the motor type, those controllers are probably meant for rc airplanes, which don't need reverse.

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      I think they are rc plane ones , I don’t know how I would make the controller switch to reverse?

  • @DatBlueHusky
    @DatBlueHusky ปีที่แล้ว +3

    putting more impellers wont do much, you are already running max power of those motors and its doing really well for what it is without water cooling. I would recommend ditching the dual jets and go with a single bigger one but use the 2 motors in a belt drive or somehow make them work in series together.

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว +1

      Printing a different impeller is a lot easier than redoing all that haha

  • @kokopoppan
    @kokopoppan ปีที่แล้ว +2

    FINALLY A NEW VIDEO, LESSGO!!!

  • @Enz3d
    @Enz3d ปีที่แล้ว +2

    Hi mate getting more RPM out of a brushless motor you need to up voltage, the rpm is directly proportional to voltage so there's nothing you can do to up RPM other than voltage increase, alternatively you can opt for a higher KV motor and you can calculate the nominal RPM by multiplying the KV rating by the input voltage. one thing with going higher KV on the same setup is they pull more current to make more RPM which is effectivly higher wattage. the most efficient way to do it is go lower KV and more voltage and keep the current as low as you can. you can buy current/voltage sensors to plug between the battery connector that can log the usage so you can see whats going on.
    ive made a custom electric surfboard before and the problem i keep running into is with out runner motors like you're using the cooling plate on the front just isint enough to keep them cool as theyre really designed to be cooled by air, the inrunner has the motor windings on the outside and magnets on the shaft so the water jacket encapsulates the entire windings and it works a shit tonne better.
    love your work man cant wait to see where this goes!

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว +1

      I have the wrong motors really but trying to make it work . Thanks for the advice I will read through it a few times

  • @lewlhax
    @lewlhax ปีที่แล้ว +1

    Impellers could do with a redesign potentially. Have a look at jet ski impellers and more specifially the hub design of how it is a cone and starts small and gets bigger at the exit.
    Nozzle diameter will affect top speed and hole shot.

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      Yeah I have a JetSki impeller it does have a bigger cone which will speed up the water it is something I can try👍

  • @iamkian
    @iamkian ปีที่แล้ว +1

    Popcorn time

  • @NavalTechTinkerer
    @NavalTechTinkerer 2 หลายเดือนก่อน

    Hi. Did you figure out why it was cutting? I posted a video a few days ago, and I have the same problem. It cuts, and then comes back - its a 20kw 3d printed carbon skinned electric outboard. let me know if you sorted that motor cutting - would love to know what you did!

  • @lureup9973
    @lureup9973 ปีที่แล้ว +3

    I absolutely love this build..I’d give youngsters jet guy a shout, he’d be able to answer your questions..keep up the great work you do here, it may the very thing that keeps the world from falling apart!

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      Yeah he watches my videos and I watch his , I’m sure he will comment soon

    • @BIGWIGGLE223
      @BIGWIGGLE223 ปีที่แล้ว

      Youngsters is a wild man. Lol!! That little dutch boot looking kayak is one hell of an absolute ripper too!!

    • @lureup9973
      @lureup9973 ปีที่แล้ว

      @@BIGWIGGLE223 either the dude weighs in at under 80lbs, or he builds some muscle jets!

    • @BIGWIGGLE223
      @BIGWIGGLE223 ปีที่แล้ว

      @@lureup9973 hahaha!! He builds some muscle jets. He's got the proper formula down.

  • @lambojoe11
    @lambojoe11 2 หลายเดือนก่อน

    DC: direct current: red wire positive, black wire negative in a DC electric motor iif you switch the red wire witb the black wire will reverse the rotation of that DC electric motor. You asked how to reverse your motors rotational direction. I didn't read comments to see if others answered this.

  • @ericdetlefsen8136
    @ericdetlefsen8136 ปีที่แล้ว

    Just looking at it. I bet you could use copper tube and get some cold to the ESC’s. Ha you thought about getting a remote and receiver? Ive seen you work. Calibrate it and figure out a like steering wheel throttle. Pull go forward, flick go back.

  • @retsamyar
    @retsamyar 7 หลายเดือนก่อน

    how come you didnt use like those water tight tupperware containers and put some grommits to get teh wires in and out? do they get too hot for that? nevermind i see you found solutions that work just fine and not so "janky"

  • @MakingStuff
    @MakingStuff ปีที่แล้ว

    I've never seen a fiber glassed 3D printed part. Brilliant!

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      It didn’t stick too well but it is a kinda complex part. Definitely made it stronger though

  • @fourmisvolantes
    @fourmisvolantes ปีที่แล้ว

    You shoud put water cooled brushless motor and ESc with a little pump to make them cooled down

  • @zackmoore147
    @zackmoore147 2 หลายเดือนก่อน +1

    6:00 that creek looks like paradise, beautiful 👍

  • @nathanpennell1587
    @nathanpennell1587 ปีที่แล้ว

    Haha, just down the road from the college. Next to my place

  • @markoijen8671
    @markoijen8671 4 หลายเดือนก่อน

    Don't you worry about Saltys pulling you outa that tiny boat lol

  • @tylerseabook9423
    @tylerseabook9423 ปีที่แล้ว +1

    This man deserves more subs. Imagine what he could do with a bigger budget

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว +1

      Yeah imagine a Tesla motor in one haha

  • @commonsenseproductions5893
    @commonsenseproductions5893 ปีที่แล้ว +1

    My brother put the electronics in a separate compartment than the jet pumps. On a jetski, the jets are isolated in the rear, the engine is in the main compartment, and the electronics are in a watertight box mounted high up in the engine compartment
    Mount the electronics in a watertight box at the back opposite the battery

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      I have them in the box because there is a fan on the motor and the esc need the cooling. I might make a water cooling block for them and move them somewhere else

  • @benedictcumberbatch4275
    @benedictcumberbatch4275 ปีที่แล้ว

    Probably need a lighter foam boat with those motors to get any speed.

  • @stevevukich8958
    @stevevukich8958 ปีที่แล้ว +1

    The reason your thrust is low is that the water jet is exiting into the water, it needs to shoot more up into air....f=ma means take a mass m and the more you can accelerate it ,a the greater will be the force, f, in the opposite direction. Test this with a bucket of water and a garden hose running...feel the force difference between in and out of the water...good luck

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      Yes! So many people say they should be underwater but you are right. They will be above water once planning

  • @johnconnor6725
    @johnconnor6725 10 หลายเดือนก่อน

    Add a small inlet nipple on the intake side running a check valved hose to the lowest point in the jet box will suck all the water out and yes it will suck air when there is no water but that didn't hurt performance on my DIY RC jet boat builds.
    $0.02

    • @DktheWelder
      @DktheWelder  10 หลายเดือนก่อน +1

      That is a great idea! Never would have thought to try that thankyou👍

  • @thomashaley3830
    @thomashaley3830 ปีที่แล้ว

    Conformal coat everyrhing

  • @rommerluca2481
    @rommerluca2481 ปีที่แล้ว

    Porra boy, você quer fazer um barcocross. Kkkkkkkk

  • @rickyridgeway66
    @rickyridgeway66 ปีที่แล้ว

    Bye adding trimtabs might make it plan better because of adding a bit of length to the boat, and once u sorted out the prapoltion .just a kind thought mate.

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      It would help but have fried the controllers now . I am putting a chainsaw motor on it now

  • @joerover
    @joerover ปีที่แล้ว

    well, unbelieve a pair small motor power can work ! of course the power not enough, and too small jet stuff up branch ! by the way, the units need to water cooler will be better !

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว +1

      I think it would have been able to move a lot faster with a better impeller I was about to test it but fried the esc. I will revisit this project with water cooled motors and escs one day , expensive though

  • @geoffburrill9850
    @geoffburrill9850 ปีที่แล้ว +1

    You might need trim tabs at rear so you can alter angle of boat.

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      I could do I can also shift my weight, I think more thrust will sort it

  • @kermets
    @kermets ปีที่แล้ว

    Is the boat mostly flat bottom ? that will get you on the plane way quicker......maybe
    added a sheet of alloy to make it a flat bottom.....

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว +1

      Yeah it is basically flat bottom with just some folds to give it strength

  • @rileysytsma
    @rileysytsma ปีที่แล้ว

    Reason it’s going so slow s there’s to much weight in the back of the boat try shifting your body weight to the front to try to get up on plane

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      I did try sitting in different positions, there’s just not enough thrust there

  • @jaycweingardt11
    @jaycweingardt11 ปีที่แล้ว

    10:20 if the impellers are different pitch and the same diameter they will just fight each other because they both want to move water at different rates.

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      The second one is more aggressive. Google 2 stage jet pump there are some good pictures

  • @kiwi_welltraveled4375
    @kiwi_welltraveled4375 ปีที่แล้ว +1

    Awesome!
    One suggestion......
    Could you separate the impellers from the electronics in two separate water tight compartments?
    With the holes for the driveshafts being the only area needing to be sealed between the compartments.
    Massive Respect, love you #8 mentality.
    If they had any sense, Rocket Lab would be knocking on your door!
    🙂👍

    • @maxpower700
      @maxpower700 ปีที่แล้ว +1

      Easily. A Tupperware box for the escs and reciever would be more than enough😁

    • @kiwi_welltraveled4375
      @kiwi_welltraveled4375 ปีที่แล้ว

      @@maxpower700
      Tupperware
      That's so last century American.....
      Surely it would have to be Sistema!
      Don't forget the electric motors.
      Would you have three separate or one giant plastic container?
      Sponges being optional extras of course
      🙂👍

    • @maxpower700
      @maxpower700 ปีที่แล้ว +1

      @@kiwi_welltraveled4375 dont think Ive heard of sistema here in Sweden 😂👍 Motors could even handle running under water (fresh water) so a single small would do 😉

    • @kiwi_welltraveled4375
      @kiwi_welltraveled4375 ปีที่แล้ว +1

      @@maxpower700
      Ki Ora mate
      Sweden!
      Wow, ok, I didn't imagine this channel had such a wide appeal
      It is so quintessentially Kiwi
      That's sweet as....
      Another Kiwi TH-camr you might enjoy is "Marty T"
      Sistema is the NZ manufactured equivalent of Tupperware, only of a much higher standard.
      You might not have got the #8 reference.
      It's a very old saying here (NZ old, not world old) that we can fix just about anything with a length of number 8 fencing wire.
      Of course nowadays we're just as much a disposable society as anyone else but there are still the odd tinkerers like our mate in this video and Marty T.
      😀👍

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว +1

      Yes I could also the motors can take a bit of water but the esc can’t but also the motors have fans to blow air around them

  • @aprilroseanticamara6772
    @aprilroseanticamara6772 ปีที่แล้ว

    have you considered using a carbon fiber filament for your prints?

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      Yeah I have looked into it but apparently it is weaker a few guys on TH-cam have done strength test but it seems like normal PLA is better

  • @hedgemcnorry9459
    @hedgemcnorry9459 ปีที่แล้ว

    my old jetski had a 0.2mm gap between the impeller and the casing

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      I probably have less than that! I probably need higher rpm motors or more aggressive impellers but I have burned the esc now😩

  • @rampentpanda
    @rampentpanda ปีที่แล้ว +1

    brushless motors have a Kv rating, (not to be confused with kilovolts) it describes the RPM (K) per volt (v) under no load, so a 500 Kv motor hooked up to a 10v system should spin 5000 rpm. and if you hooked that same motor up to a 20v system you could expect 10,000 rpm. long story short in order to get more rpm out of the same system you need a higher voltage battery. that being said i think your idea to just make a more aggressive jet unit would be cheaper, and that would load the motors more, allowing you to get more power out of them. just be weary if you're already feeling wires get warm, they are only going to get warmer under higher load!

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      Yeah I’m not getting the rpm I need I think the motors can handle a lot more load , they will get hot also maybe the battery isn’t keeping up?

    • @rampentpanda
      @rampentpanda ปีที่แล้ว +2

      @@DktheWelder one easy way to see if your battery is the weak link is to just get a voltage display and see how much the voltage sags under load. its normal to see around 5 to 10% drop but any more than that and you're probably approaching the amp limit of your battery. if you have a higher voltage battery available or another identical one to run in series you might try that, provided the motor controllers can handle the higher voltage obviously

    • @meganguerra-cd9gj
      @meganguerra-cd9gj ปีที่แล้ว

      If the motor are 20kw thats crazy power put another battery in series and a coolin system for your controller a motors

  • @cheythompson740
    @cheythompson740 ปีที่แล้ว

    I've got 2 watercooled pocket rocket engines here that would push that little boat real well

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      Yes they would, those water cooled ones are pretty powerful, are you in New Zealand?

  • @kieranshelley8495
    @kieranshelley8495 ปีที่แล้ว

    i use a can of loctite 3900, or conformal coating for waterproofing escs

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      Ok I will keep that in mind thanks

  • @mikekeller491
    @mikekeller491 8 หลายเดือนก่อน

    It would be more efficient if the thrust was under water!

    • @DktheWelder
      @DktheWelder  8 หลายเดือนก่อน

      The nozzle has to be above the planing surface it is less efficient pushing underwater all jet boats are like that. A lot of people think that a guy did a video explaining it

  • @jaycweingardt11
    @jaycweingardt11 ปีที่แล้ว

    Looks like it needs double, maybe triple power to get on plane.

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      Hopefully not triple the power!

  • @monstercameron
    @monstercameron ปีที่แล้ว

    im jjust thinking about all the snakes that were right beside you

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      No snakes in New Zealand

  • @MsJon52
    @MsJon52 ปีที่แล้ว

    forgot to mention how I know this, I have just cut a mobility scooter in half, and attached a lawnmower handle to it with a thumb-operated throttle, so it's a two-wheeled 24 v forward and reverse Pullme 2000 mrk 1, it will pull me up are local steep hills, so that's how I know it works.

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว +1

      Sounds like a cool project

    • @MsJon52
      @MsJon52 ปีที่แล้ว

      @@DktheWelder it should be, as yet I have not tried it on the road, soon will though, IF it drags me under a bus I will have to respond to you with a negative response to it being cool.

  • @kermets
    @kermets ปีที่แล้ว

    Check with the speed controller specs most speed controllers will not go into reverse but some will,
    then you can program reverse from a software called BLHeli.....

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      How do you program them? Do you plug something into them?

    • @kermets
      @kermets ปีที่แล้ว

      @@DktheWelder yes you use somethink like a FTDI323 or USB linker or Arduuino,
      to be honest Daniel I dont think it will clear the weeds, do a test and reverse two of the 3 wires like someone below has said
      to test it out.....think it will just turn the weeds in reverse and the prop nut might come off. Brett

  • @ForeverLoco4
    @ForeverLoco4 ปีที่แล้ว

    Marine grade parts plus go way above the needed power.

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      I might have to switch to marine parts. I got given this stuff that’s why I’m using it

  • @onbedoeldekut1515
    @onbedoeldekut1515 ปีที่แล้ว

    Why do the jets have to be 'attached'?
    If there's power to them through a wire, you could theoretically have them on the end of manoeuvrable stalks/branches from over the top/back.

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      Like an outboard? They do make jet units like that , but up in the body they are away from hitting rocks and stuff

    • @onbedoeldekut1515
      @onbedoeldekut1515 ปีที่แล้ว

      @@DktheWelder It was one of my sillier ideas lol.
      I initially thought of putting the stalks through the bottom with foils on to lift the hull out of the water, or that could be pushed down somehow when needed.

  • @MrTamiyacowboy
    @MrTamiyacowboy ปีที่แล้ว

    to help cool the ESC's. if you are able to you can fab up a water block , an alloy block drilled out so water flows through it , you have to barbed hose fittings on each water block , on block 1 you have an inlet and outlet, on block 2 an inlet and outlet.
    block one inlet takes water from one of the impeller housings and feeds into inlet on waterblock 1, outlet from water block one is conencted to inlet on water block 2, outlet on water block to is routed via hose to external of hull. give the esc's a caoting of varnish, rubber paint. when mounting the waterblocks you need them to be in contact with the mosfets, these are the voltage regulators and get hot, to help use thermal paste/grease to act as a heat transfer into the waterblocks, think of it as a liquid cooled pc but we are liquid cooling the esc mosfets. pulling heat away and instead of having a closed loop cooling system we are just dumping the warm water back into the river/water source
    Voltage is the key to more power, more voltage = higher rpm , higher voltage means more more heat produced by the ESC'S so you will come to a point where the esc's may shutdown to thermal overload or worse still cause mosfets to fail due to burning out so watercooling will help solve that problem .

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      Yeah I think the water cooled block is a good idea I have been thinking about that , once I put bigger impellers in it will make them load up and get even hotter

    • @MrTamiyacowboy
      @MrTamiyacowboy ปีที่แล้ว

      @@DktheWelder for sure DK those larger impellers gonna cause some strain on the ESC's, most RC boats these days run watercooled Motors and esc's. you can watercool your notors but its going to be a watercooled mounting block only so may not help as much being outrunner motors you have installed.

  • @mytubehkjt
    @mytubehkjt ปีที่แล้ว

    You can reverse the direction of motor spin by swapping any two on the ESC to Motor wires over (assuming brushless motors).

  • @iamkian
    @iamkian ปีที่แล้ว

    I think the cutting out problem is the ESC's, and you pulling to many amps!
    You should get some VESC's to power the motors. (a VESC has way more settings to play with.)
    Do you have a mesh / grid at the intake of the jets? This will stop a lot of "grass" being sucked in.
    Also. The water jets stream should be lower in the water.
    According to ChatGPT: "When the pump of a waterjet is submerged underwater, the nozzle of the waterjet will generate more power when it is also submerged underwater. This is because the water surrounding the nozzle helps to create back pressure and resistance, which improves the efficiency of the waterjet and allows it to generate more thrust.
    When the nozzle is above the water surface, it will not have the same level of back pressure and resistance, which will reduce the efficiency of the waterjet and limit its ability to generate thrust
    Therefore, to achieve optimal performance from a waterjet-equipped craft like a jetski, it is important to ensure that both the pump and the nozzle are submerged underwater during operation. This will help to create the necessary back pressure and resistance for the waterjet to generate maximum power and perform at its best."

    • @maxpower700
      @maxpower700 ปีที่แล้ว

      Except for when you ask the guys that do this for fun and a living, its less like the robots telling you, and more like a case of "a jet drive on a boat doesnt push you, it pulls you by the intake, so it doesnt matter alot of you shoot it into the water or into the air" ;)

    • @00000005547
      @00000005547 ปีที่แล้ว +1

      @@maxpower700 Yep lol. The back pressure does make it more efficient, but the added drag from everything being underwater completely negates any positive effects. Regardless of how low you put the jets, unless they are UNDER the boat, whenever the boat is on plane they will be out of the water.
      After all this is a jet boat, they are inherently inefficient. Yes while a ducted "impeller" is more efficient than an equal size propeller, at higher flow rates the drag induced by the fluid flowing past the duct causes once again, more losses than the benefits they create. When you could just get a 2x bigger propeller and increase efficiency drastically.

    • @iamkian
      @iamkian ปีที่แล้ว

      @@maxpower700 I do this for fun too. My dad and I have build 2 electric jetboards. We did a lot of "static" testing, and in our case the pumps worked better when the nozzle was just below the surface!
      Think about it. Water is denser than air.

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว +1

      I will look into the vesc thanks. A JetSki and jetboat nozzles are out of the water on plane , I think from a stand still the outlet underwater is fine but works better. A guy on TH-cam did a test actually with scales and stuff. I have seen your videos your boards work well !

  • @randomname4726
    @randomname4726 ปีที่แล้ว

    Awesome boat though, great job dude. Once you get it up on the plane it'll be great fun.

  • @indianahenschell5019
    @indianahenschell5019 ปีที่แล้ว

    Yes there is a way to go reverse and u should do a 2 stage

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว +1

      I have a reverse bucket I haven’t put it on yet. I think I will try a different impeller first

  • @randomname4726
    @randomname4726 ปีที่แล้ว

    If you want PLA to be waterproof, print it quite hot and with 110% to 120% extrusion multiplier. Works mint.

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      Ok thanks I will try that. What is extrusion multiplier? And what does it do?

    • @randomname4726
      @randomname4726 ปีที่แล้ว +1

      @@DktheWelder 120% extrusion multiplier just tells your extruder to extrude 120% of the normal amount of plastic, 20% more than it normally would. This squishes the layers together really well. 110% might be sufficient, 120% may be overkill.

    • @randomname4726
      @randomname4726 ปีที่แล้ว

      @@DktheWelder I should add that it's a setting in your slicing software.

  • @maxpower700
    @maxpower700 ปีที่แล้ว

    Oh you mean a reverse? If your escs has it, your servotester throttle should be able to engage it, if you calibrated the throttle positions on the escs.
    Also, you should look into boatgrade escs. Pricey, Yes, but watercooled, and waterproof👍😁

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      O so I can press that button on the servo controller to make reverse work? How do I calibrate the throttle position?

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      I think it was calibrated wrong when I first took off on the video the throttle was getting stuck on too

    • @maxpower700
      @maxpower700 ปีที่แล้ว +1

      @@DktheWelder different from different escs, youll need their manual to check :) usually its starting with neutral or full throttle and moving to other position within short time span or after a beep 😀

  • @SuperMatt6000
    @SuperMatt6000 ปีที่แล้ว

    Try salt annealing your prints if you want them to be waterproof in future.

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      O yeah I have heard of that never thought about it I will look into it, have I messaged you before?

    • @tristec22
      @tristec22 ปีที่แล้ว

      Here, I found an interesting video: th-cam.com/video/DyAKtS1b3SQ/w-d-xo.html

  • @matthewjackson9092
    @matthewjackson9092 ปีที่แล้ว

    A great video there mate just wondering where you are in New Zealand the catch up one day as I'm in Papakura keep up the great work stay safe and have fun

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      Are you the jackson electrical guy? I am in waihi

    • @matthewjackson9092
      @matthewjackson9092 ปีที่แล้ว

      @@DktheWelder no I'm not Jackson the electric guy I'm Matt Jackson the big guy

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      @@matthewjackson9092 haha ok 👍

  • @gafrers
    @gafrers ปีที่แล้ว

    This is another great project/build on this channel.

  • @cloudpandarism2627
    @cloudpandarism2627 ปีที่แล้ว +2

    told you last time its not enough power ^^ 😋

  • @BIGWIGGLE223
    @BIGWIGGLE223 ปีที่แล้ว

    Only advice I can think of (besides the typical motorhead advice of getting bigger motors) is maybe a hull redesign. Your motors don't sound like they're reaching full power. Could be the ESC's. Maybe the props need a redesign as well?
    I'm sure someone will pop up in the comments that can be of more help. Maybe an actual "expert".
    Loving the build series!! We're all cheering for you to get this little boat on plane from our armchairs!!

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      The motors are reving to there maximum speed too freely need more impeller pitch ready for another test tomorrow 👍 . I like all the comments but not really sure who to listen to haha. I know the hull planes easy with a 3.5hp outboard and these motors together should be 20hp ! But jet units are really inefficient

  • @BruceLyeg
    @BruceLyeg ปีที่แล้ว

    It might not be fast, but it's not slow. Looks like a lot of fun. If heat does become an issue for the battery pack, attach an eBay heat sink to it.

  • @moonlighthaze222
    @moonlighthaze222 ปีที่แล้ว

    Need to go bigger with the impellers and housings but unsure how much more your setup has to offer power wise. Your probably gunna need closer to 20 hp (750 watts) to get it on a plane with your current hull design. Impellers and jet drives are notoriously difficult to fine tune for max power consumption especially when higher rpm’s are at play cavitation will always be your enemy.
    This is an awesome project and has a lot of potential I think she just needs more power and impeller. Definitely earn a follow and like from me👍.

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว +1

      Apparently the motors are 10kw each , it’s crazy because with a 3.3hp outboard it planed easily. I hope I don’t have to put in bigger jet housing’s

  • @highdesertbiker
    @highdesertbiker ปีที่แล้ว

    DIY waverunner amazing bro. I think you should develop a system to keep the grass out OR a simple cleaning process. I remember our waverunners would always pick up sticks and after a while you'd have to get them cleaned proper

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      Haha the grass and sticks are a problem! Thanks 👍

  • @kingmarz3635
    @kingmarz3635 ปีที่แล้ว

    Looked to be nearly on a plane but you just need 2x the thrust you have
    Can’t wait to see the improved version
    It would fit a rotax jet ski engine
    Please viewers someone give him a old jet ski.

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      A little more and it would plane I think

  • @aquacruisedb
    @aquacruisedb ปีที่แล้ว

    "It's a bit rough when hitting the rocks" 🤣😂😅 Yeah, boats and rocks have this long standing animosity, goes way back. Great vid as always, cheers mate!

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว +1

      I also have no seat which hurts a bit when hurting rocks haha

  • @tazyt3388
    @tazyt3388 ปีที่แล้ว

    Man it’s getting more epic every time you mod it loving this thing bro ⭐️⭐️⭐️⭐️⭐️

  • @andersson.l.e
    @andersson.l.e ปีที่แล้ว

    Nice boat. Looks fun to ride it. Good work.

  • @joesspace4114
    @joesspace4114 ปีที่แล้ว

    Men I've been waiting for this one

  • @NathanNostaw
    @NathanNostaw ปีที่แล้ว

    Any chance of adding a weed chopping blade before the impeller? And for the leaks into the control box, maybe run a small compressor with a few psi to create some positive pressure.

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      Yeah I was thinking something to chop the weeds, I do like the compressor idea but don’t want to add any more weight , maybe if I can find a small one

  • @matui6983
    @matui6983 ปีที่แล้ว

    Theres an instant smile on my face as soon as a DK the Welder video pops up.
    Wonder how you could stop the noise from echoing thru the hull?
    Plastic/Teflon/Nylon on the bottom of the hull is a great idea for protection too.

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      Yeah that would help. It’s not really that loud in person but could be a bit quieter 👍

  • @mikerammelt2420
    @mikerammelt2420 ปีที่แล้ว

    The motors are reving fine, so yeah more pitch or a two stage with a stator in between.

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      Yes that is exactly what I am thinking, thankyou !

  • @tylerseabook9423
    @tylerseabook9423 ปีที่แล้ว

    Your quote the fabricator man. Good work.

  • @Trent28888
    @Trent28888 ปีที่แล้ว

    To change the way it spins ya need to swap around 2 wires as its 3 phase

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      Yeah I get that, was just wondering if I could do it through the controller somehow just to untangle the weeds👍

  • @rattyphilips9247
    @rattyphilips9247 ปีที่แล้ว

    Looking good 😊

  • @onbedoeldekut1515
    @onbedoeldekut1515 ปีที่แล้ว

    It might be an idea to coat the electronics in a wax, that should keep them safe from water damage.

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      Ok , is there a specific wax I should use?

    • @onbedoeldekut1515
      @onbedoeldekut1515 ปีที่แล้ว

      @@DktheWelder I don't know for certain, but I saw a thing where 4x4's had their electrics coated for when they went places where the engine would get submerged and thought it would help you as well.
      I think there are even modern sprays which act the same way that you might be able to get from a specialist.
      I expect there's someone reading who'll know what I'm talking about and could help more than me.

  • @MsJon52
    @MsJon52 ปีที่แล้ว

    to reverse the motors you need to reverse the current flow, earth wire to positive and positive to earth, the motors will turn in the opposite rotation, to do a good job, you will need a relay switch which you can switch off the positive current then by switching on the relay wired up as positive ground, the motor will rotate in the opposite rotation.

    • @kermets
      @kermets ปีที่แล้ว

      not for ac powered motors sorry

    • @MsJon52
      @MsJon52 ปีที่แล้ว

      @@kermets the scooter is 24v dc, it will be interesting to find out how and if it's possible for ac and if not why not?

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว +1

      Yeah the motors are 3 phase , I was wondering if it could be done through the controller somehow

    • @MsJon52
      @MsJon52 ปีที่แล้ว

      @@DktheWelder I fitted the controller so I could use the electric thumb throttle and have some control over motor speed, why it would not work on three-phase I have not a clue, my question to the people who know would be, is it possible and if not, why not?

    • @kermets
      @kermets ปีที่แล้ว +1

      @@MsJon52 no its not possible to just reverse the dc voltage you will blow the ESC up,
      you need to program the speed controller to have zero throttle mid stick, that way when you want reverse you pull back,
      you need to research the ESC to see if the can run software like BLHeli with reverse

  • @peter360adventures9
    @peter360adventures9 ปีที่แล้ว

    Awesome.

  • @kingmarz3635
    @kingmarz3635 ปีที่แล้ว

    Just K swap it:)

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว

      Boosted boys have done that haha. I want one I can carry to little creeks

    • @kingmarz3635
      @kingmarz3635 ปีที่แล้ว

      Actually
      Boostedboiz is my favorite TH-cam channel

    • @kingmarz3635
      @kingmarz3635 ปีที่แล้ว

      Actually
      Boostedboiz is my favorite TH-cam channel

  • @MrJob91
    @MrJob91 ปีที่แล้ว

    Can you imagine how much fun buying a small outboard and light planing hull would have been in comparison to inventing the wheel to be square diy fashion

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว +1

      On this same boat I had a 3.5hp outboard and it planed easily and was pretty fast

  • @JohnSmith-wb6kq
    @JohnSmith-wb6kq ปีที่แล้ว

    Glad you and yer family stayed safe during the apocalypse bro, keep up the good work, a nice distraction from the shite that's happening 🙂

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว +1

      It is pretty bad for some people here, we live on a hill so are safe👍

  • @rustyballs2485
    @rustyballs2485 ปีที่แล้ว

    Your lucky to have such clean water after storms

  • @RamenPoweredShitFactory
    @RamenPoweredShitFactory ปีที่แล้ว

    Would be cool if it had differential thrust for turning.

    • @DktheWelder
      @DktheWelder  ปีที่แล้ว +1

      I did think of that!