DIY twin motor RC boat: top speed running until breakdown!

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  • Опубликовано: 10 сен 2024

Комментарии • 25

  • @N2SRC
    @N2SRC 6 месяцев назад

    Great runs as always, "100 mph in choppy water" is a freaking win to me

    • @CozyRC
      @CozyRC  6 месяцев назад +1

      Thanks! The speed is in km/h, so 108km/h is 67.5 mph 😎

  • @peteroosterhoff8850
    @peteroosterhoff8850 6 месяцев назад

    That was a decent run. I mean, 100+ in choppy water isn't bad. Also you demonstrated why you need to unplug your electronics when your working on it (for the less experienced boaters), happened to me once too that engine started to run after a crash and taking on some water.
    Also noticed the response when you let off, experienced it also with my own twin (which i was thinking to use the components from for new hull) and on a video from ironclad. Makes me rethink if i really want to go twin with my new build. Starting to think a single might be the better choice...

    • @CozyRC
      @CozyRC  6 месяцев назад

      A twin mono runs more stable, but letting off the throttle needs a bit more care. These are some big props too; 44mm 1.9 pitch.
      A twin mono is just so cool! I would definitely make another twin. I could share the drawing of the G-Force, if you're interested? ✌️

    • @peteroosterhoff8850
      @peteroosterhoff8850 6 месяцев назад +1

      @@CozyRC thanks, but i have an empty hull which is around 1m. My idea was 2x4082 on 6s or 1x4092 on 8s (like my Dom)... Im bit worried the twin drives will become to high above water and also will give issues cornering. Was thinking to tackle that by using cat drives since there bit longer (and look nice too) but thats already thinking in problems. The thing is, i dont want to redo layout inside the boat if it doesn't work properly since it's a rare hull. On other hand, the most off them are build as a twin.

    • @CozyRC
      @CozyRC  6 месяцев назад

      @@peteroosterhoff8850 It depends on how you want the boat to run. For speed and straight-a-way runs, a twin drive is perfect. I use 100mm stingers for the same reason you mention: to have enough prop in the water, even though they are a few cm off-center.
      That's also why I can run 44mm 1.9 props with 3670 motors. They don't even get warm. These boats requite different setup compared to a single drive. But the twin motor sound is just great and the rooster tail from the props is awesome too 😎

    • @peteroosterhoff8850
      @peteroosterhoff8850 6 месяцев назад +1

      @@CozyRC i know from my current twin it sounds really great, i love it. The thing i'm most afraid off is that it doesn't want to turn at speed like within 15m or so. I mostly run not to big ponds since there close, so it would be a bummer if i cant use it there.
      My current mono only turns very big turns, or at low speed. It's almost un-usable... I know it has to do with that hull, but it makes you kind off afraid to try it on another hull...

    • @CozyRC
      @CozyRC  6 месяцев назад

      @@peteroosterhoff8850 I get it. You're boat should fit the place where you can run too. And a twin does indeed need a bigger turning cirkle!

  • @ahmadgazali3019
    @ahmadgazali3019 6 месяцев назад +1

    Hi friends, I'm asking for advice... My Twin Cat weighs 3.8kg with only 4mm flexible and currently using a 37mm prop and I want to add 40mm, will the 4mm flexible last without breaking... please guide me friend 🙏

    • @CozyRC
      @CozyRC  6 месяцев назад +1

      That should be no problem. I'm running a 43mm 1.6 prop on my T800 F1 Tunnel, which has a 4mm flex shaft as well.

    • @ahmadgazali3019
      @ahmadgazali3019 6 месяцев назад +1

      @@CozyRC That means it's safe, friend, to use a 40mm prop with only 4mm flexible...

    • @CozyRC
      @CozyRC  6 месяцев назад +1

      ​@@ahmadgazali3019Yes, it should work.

    • @ahmadgazali3019
      @ahmadgazali3019 6 месяцев назад

      @@CozyRC Ok.. 👍👍👍👍👍

  • @daiciuapostol79
    @daiciuapostol79 6 месяцев назад

    yes, the propellers are like anchors if they stop suddenly, they require progressive deceleration.
    It was a good day for the GForce,you start to be more confident and open the trotthle

    • @CozyRC
      @CozyRC  6 месяцев назад +1

      You are right about the props under deceleration. It needs more care and you need some space to let the boat slow down.
      The downtrim of the stingers make the boat more stable, so I'm more confident to run it full throttle. It's a bit slower too.. It was too bad the G-Force stopped in second run. The water became smoother and I wanted to run some laps. Next time hopefully!

    • @daiciuapostol79
      @daiciuapostol79 6 месяцев назад +1

      @@CozyRC the race to find the best setting has begun, how about powertrimms at 0° and the batteries as far back as possible and the tip of the trimmtabs 2mm above the boat line, that would be my next setting but it's up to you.

    • @daiciuapostol79
      @daiciuapostol79 6 месяцев назад +1

      🫣 o soory you don't have trimmtabs

    • @CozyRC
      @CozyRC  6 месяцев назад +1

      ​@daiciuapostol79 Haha that's right! I prefer to not use them. The SAW guys don't use them either.
      The stingers are about 1.5mm downtrimmed now. The centre of gravity is at 30%. On flat water, I could run the stingers 0.5mm down, with the lipo's shifted forward.
      A new speed record will soon be made, I'm sure. The SSS 3674 2075kV motors are waiting too. More power and more rpm.
      Oh, and I will run with a single big lipo again, but I need to make strong lipo brackets, to secure a single lipo. More to come!

    • @daiciuapostol79
      @daiciuapostol79 6 месяцев назад +1

      @@CozyRC my proposal does not have a logical thinking, what would I do I would leave the boat freer only from the CG, but as I said in the past I would have started with 5s not on 6s, it is a bit too brutal and harder to find the correct setting