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    Sub nubie.. need some help

    Need help abt de ballast n manuvering systems..

    1. Ballast: -Do i need to use a pump? if so, where can i get it?
    -how to contain the water inside de sub?

    2. Manuvering System: -how do i connect the control surfaces to the servos
    without having leakage problems?

    Anybody who build n play wif subs, pls help =)
    zooooomm!

    #2
    [QUOTE]
    1. Ballast: -Do i need to use a pump? if so, where can i get it?
    -how to contain the water inside de sub?[QUOTE]

    You can use a pump based ballast system.
    Get one of those windshield wiper pumps at automotive supplies stores.
    You can use a plastic bottle or RC fuel tank as your ballast tank

    2. Manuvering System:
    -how do i connect the control surfaces to the servos without having
    leakage problems?
    You can pass your control rods through silicon fuel tubing attached to the
    walls of your water-tight compartment like what Stuka did in his Akula.
    Be sure to grease the rods to prevent binding and ensure water tight
    operation
    make it simple, make it strong, make it work!

    Comment


      #3
      [QUOTE=redboat219;345682]

      You can use a pump based ballast system.
      Get one of those windshield wiper pumps at automotive supplies stores.
      You can use a plastic bottle or RC fuel tank as your ballast tank
      i see i see.. but how do i operate the pump so that it can draw in n extract out water?
      zooooomm!

      Comment


        #4
        [QUOTE=adino;346370]
        Originally posted by redboat219 View Post

        i see i see.. but how do i operate the pump so that it can draw in n extract out water?
        You can you a servo to actived micro switch. As the servo moves one way it pushes on the micro switch activating the pump to draw in water and fill the tank causing the sub to sink. As the tank fills air inside is compressed. Turning the servo to the opposite position turns the pump off. The pressurized air inside the tank will then push out the water causing the sub to return to the surface. You'll need to install a blocking valve. This is just a section of silicone tubing that is pinched by the servo when it is in neutral position. This prevent water leaking out and prevent you sub surfacing prematurely.

        make it simple, make it strong, make it work!

        Comment


          #5
          How much u wanna spend???

          Browse here for specialist advice and ideas.



          Or maybe consider a kit, thes epeople seem to produce a very competitve product
          杭州方舟模型科技有限公司坐落于风景秀丽的西子湖畔. 专业弢�发生产大型精密遥控模�?尤其专精于潜艇��军舰模型和战车模型,模型完全按照真实产品缩小比例��成。尺寸精确��外观精美����能安全可靠。产品分为套件和成品两类,套件包含制作一艘精密模型所霢�要的扢�有零部件,成品模型由方舟资深模型师手工精制,是不可多得的工艺品,但同时也可以遥控航行,让您体会操纵的乐趣�? 公司的宗旨是“创新与推广”��依托公司优势的人才资源和创新精神,本公司的产品在近年来的航模比赛和各种展会中屡获奖牌和各界好评,到目前为止产品已经锢�售到全国数十个省市以及全世界的绝大部分国家和地区。并被国内外知名海事博物馆收藏��? 方舟产品集合历史性��玩赏��和收藏性于丢�体,是开展高尚的航模休闲活动、家居收藏��馈赠宾客的佳品�?/> 方舟模型

          Comment


            #6
            Thx for the useful solutions n links redboat & Akula! really appreciate it =)
            I will look into those possibilities.

            abt the ballast tank, can i use rubber bags or some other bags to contain the water? coz de shape of my sub is not de usual "tube-like" design.
            zooooomm!

            Comment


              #7
              Originally posted by adino View Post
              abt the ballast tank, can i use rubber bags or some other bags to contain the water? coz de shape of my sub is not de usual "tube-like" design.
              Yes. You can use the rubber bladder from the cuff of a "sphygmomanometer" or blood pressure apparatus. You can also try using an empty IV bag ( ask around local clinic or hospital ER)
              make it simple, make it strong, make it work!

              Comment


                #8
                got it! =) Can i directly connect de pump to my receiver instead? so i could like directly control de pump directly (like flick de switch up, pump will draw in water. flick de switch down, pump will remove water. flick de switch to meddle or neutral position, pump will not be activated). If possible, how can i achive dat?.

                i'm currently having problem doing my propulsion system.. How does propulsion of rc subs works? do i have to mount de motor inside de sub or is it possible to expose de motor to water?
                zooooomm!

                Comment


                  #9
                  Originally posted by adino View Post
                  got it! =) Can i directly connect de pump to my receiver instead? so i could like directly control de pump directly (like flick de switch up, pump will draw in water. flick de switch down, pump will remove water. flick de switch to meddle or neutral position, pump will not be activated).
                  Yes. Use a ESC to control the pump motor. You need to use a pump that will work two ways like a gear pump.

                  [/QUOTE] i'm currently having problem doing my propulsion system.. How does propulsion of rc subs works? [/QUOTE]

                  Just like on a boat


                  [/QUOTE]do i have to mount de motor inside de sub or is it possible to expose de motor to water?[/QUOTE]

                  You can mount it inside or outside.
                  make it simple, make it strong, make it work!

                  Comment


                    #10
                    All the best bro!
                    Kedi AH !

                    Comment


                      #11
                      Thankieu danny!! =)

                      reply to de suggested solution:
                      if i expose de motor outside, wouldnt de motor will short circuit if de motor goes underwater?
                      zooooomm!

                      Comment


                        #12
                        Originally posted by adino View Post
                        Thankieu danny!! =)

                        reply to de suggested solution:
                        if i expose de motor outside, wouldnt de motor will short circuit if de motor goes underwater?
                        in fresh water it s ok, but in seawater its a problem and wont work, better to have motor dry to be honest.

                        alt to the ESC is to have a switch unit, plugged into your RX, and also have a failsafe on this, so if lost signal it empties ballast tnak

                        Comment


                          #13
                          Originally posted by Akula View Post
                          in fresh water it s ok, but in seawater its a problem and wont work, better to have motor dry to be honest.

                          alt to the ESC is to have a switch unit, plugged into your RX, and also have a failsafe on this, so if lost signal it empties ballast tnak

                          i finally managed to fixed up my pump to de esc.. but currently, i'm having some problem controlling it. I've connected de esc to the pump & i'm using a lipo 7.4V batt connected to de esc. The esc is then connected to a channel on de receiver, which is linked to a switch that has 3 position (up, centre & down). currently, when i on my pump, the off position for the switch is at the down position. When i flick the switch to centre n up, the pump will onli draw in water but at different speed.

                          i'm figuring out how to make it control the pump so that if i flick the switch up, the pump will draw in water. Centre position will cause the pump to stop/off. Down position, the pump will remove the water. Any suggestion or solutions?
                          zooooomm!

                          Comment


                            #14
                            a u using a Bi directional esc ? like those in the car ?

                            btw what pump are u using can post a pic of it ? thanks

                            Comment


                              #15
                              This will be a useful information for you Submarine.


                              Comment

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