New catamaran project

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  • Jesse J
    scale FE racer
    • Aug 2008
    • 7116

    #31
    Originally posted by Alfa Spirit
    @ Jesse j : Is it yours? Very nice looking cat

    What kind of hull is this? Looks like the Bittburger from Precision in Perfection.
    Thanks, it is actually a scratch built balsa cat from a set of plans designed by Shockerman. I made this one 27" and stretched the width by 10%, so it is more like 9" wide. Powered by my favorite Proboat motor on 5S the thing is one of the most fun boats I have. I have just finished the graphics - you probably guessed, the Miss Geico. will post pics as soon as I finish the hatch.
    "Look good doin' it"
    See the fleet

    Comment

    • Alfa Spirit
      Fast Electric Addict!
      • Oct 2009
      • 2131

      #32
      Anyway the design is nice and realistic .

      Do you know a website which explains the method to reinforce the bottom of the hull with carbon. I' m a newbie with that kind of materials. Thanks

      @ Jesse J

      Last edited by Alfa Spirit; 10-13-2009, 03:14 AM.

      Comment

      • norbique
        Senior Member
        • May 2009
        • 356

        #33
        I think Alain wanted to say this:
        Sometimes I wonder whether the world is being run by smart people who are putting us on or by imbeciles who really mean it.
        - Mark Twain

        Comment

        • Alfa Spirit
          Fast Electric Addict!
          • Oct 2009
          • 2131

          #34
          You' re right Norbert
          Last edited by Alfa Spirit; 10-13-2009, 02:40 AM.

          Comment

          • Alfa Spirit
            Fast Electric Addict!
            • Oct 2009
            • 2131

            #35
            Do you know a website which explains the method to reinforce the bottom of the hull with carbon. I' m a newbie with that kind of materials.

            Thanks


            Here' s an example of motor mount in the HOTR cat

            Last edited by Alfa Spirit; 10-13-2009, 06:54 AM.

            Comment

            • Ub Hauled
              Fast Electric Addict!
              • Aug 2007
              • 3031

              #36
              look around this site.. there are plenty of "tuts" on laying carbon... pretty easy.
              :::::::::::::::. It's NEVER fast enough! .:::::::::::::::

              Comment

              • Alfa Spirit
                Fast Electric Addict!
                • Oct 2009
                • 2131

                #37
                This cat is a cheap project, only for fun I really think this offshore will be fast and fun

                Hull + rudder and strut + motor + water colling jacket + aluminium motor mount + ESC 200A HiModel

                This is the price for HM Agitator hull alone with shipping cost



                Last edited by Alfa Spirit; 10-13-2009, 06:16 PM.

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                • RandyatBBY
                  Fast Electric Addict!
                  • Sep 2007
                  • 3915

                  #38
                  I did a explaination of how to put CF on the bottom of ABS it is about the same for FG. My Bulletin board is down right noe but will be up later
                  Randy
                  For ABS, Fiberglass, Carbon hulls and Stainless hardware
                  BBY Racing

                  Comment

                  • Alfa Spirit
                    Fast Electric Addict!
                    • Oct 2009
                    • 2131

                    #39
                    I received the hull from HOTR, very nice,

                    Last edited by Alfa Spirit; 10-17-2009, 02:15 PM.

                    Comment

                    • elvish
                      Senior Member
                      • Oct 2009
                      • 125

                      #40
                      hello,
                      are you going to reinforce the hull with carbon or kevlar?

                      Comment

                      • Alfa Spirit
                        Fast Electric Addict!
                        • Oct 2009
                        • 2131

                        #41
                        Yes,

                        The stock hull looks strong but I prefer to reinforce under the motor only. It will be OK


                        Comment

                        • elvish
                          Senior Member
                          • Oct 2009
                          • 125

                          #42
                          I have mine coming sometime in the week,
                          I have gathered links that were helpful to me; maybe they can help you out,
                          If with your setup, the boat is not stable, you have the option of installing a flap or this:


                          from your post, i get that you live in france, so do i (Paris), in the french ebay, look for :
                          Tissu de carbone sergé 200g/m2 2/2 3k, 1250 par 300mm
                          It’s enough width and plenty length.

                          I will go with 2 setups,
                          feigao 8xl , 6s and 8s (only for a speed test)on an Octura x642 and Octura v935/3
                          and a lighter setup with a neu 1512 2d on 4s and 6s (only for a speed test)on the same props.
                          speed control etti 150amps, and for the 8s setup: etti 100 amp HV
                          I will post soon on a new thread, the process of the build.

                          but I prefer to reinforce under the motor only. It will be OK
                          Believe me it will not be ok, if your goal is to reach even 40 mph
                          The gelcoat will crack.
                          You need to reinforce, the hatch, the motor base (like you said) but would be wise to reinforce all the area of the opening..
                          My 2 cent

                          Comment

                          • domwilson
                            Moderator
                            • Apr 2007
                            • 4408

                            #43
                            Originally posted by elvish
                            I have mine coming sometime in the week,
                            I have gathered links that were helpful to me; maybe they can help you out,
                            If with your setup, the boat is not stable, you have the option of installing a flap or this:


                            from your post, i get that you live in france, so do i (Paris), in the french ebay, look for :
                            Tissu de carbone sergé 200g/m2 2/2 3k, 1250 par 300mm
                            It’s enough width and plenty length.

                            I will go with 2 setups,
                            feigao 8xl , 6s and 8s (only for a speed test)on an Octura x642 and Octura v935/3
                            and a lighter setup with a neu 1512 2d on 4s and 6s (only for a speed test)on the same props.
                            speed control etti 150amps, and for the 8s setup: etti 100 amp HV
                            I will post soon on a new thread, the process of the build.



                            Believe me it will not be ok, if your goal is to reach even 40 mph
                            The gelcoat will crack.
                            You need to reinforce, the hatch, the motor base (like you said) but would be wise to reinforce all the area of the opening..
                            My 2 cent
                            You do realize that under 8S you're exceeding the 50k limit of the Feigao and are dangerously close even under 6S?
                            Government Moto:
                            "Why fix it? Blame someone else for breaking it."

                            Comment

                            • elvish
                              Senior Member
                              • Oct 2009
                              • 125

                              #44
                              Great results require great risks my friend,
                              The motor will be of course equipped with ceramic bearings, the thing you have to understand is that this experiment is for a speed test, and not endurance, 2 maybe 3 passes
                              The motor will be equipped of course with temp sensors; everything will try to be under control.
                              Is it safe? Of course not, pushing electronics to their limits is of course ever guaranteed.
                              and you are right, feigao will probably not run 8s or if it does, with a smaller prop

                              Comment

                              • Alfa Spirit
                                Fast Electric Addict!
                                • Oct 2009
                                • 2131

                                #45
                                I' m agrre a 8 turns motor with 8S batteries, your motor will take 60000 RPM , that's too much

                                On the video this is 6S, not 8S

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