Ship Docking Module

Ship Docking Module

Home Forums Scratch build Ship Docking Module

  • This topic is empty.
Viewing 18 posts - 1 through 18 (of 18 total)
  • Author
    Posts
  • #18326
    Pierre
    Participant
      @pierre

      Bottom and frames of the SDM in place. Voith unit rings epoxied in – unfortunately tops of motors will extend above deckline, so will have to box them in. Schottel units would have been better, but then I would have to have bought them!
      Side planking next.
      Cheers – Pierre
      #6538
      Pierre
      Participant
        @pierre

        Early Stage of building my SDM

        #18332
        ashley needham
        Participant
          @ashleyneedham69188

          Pierre, its a good job I know you are building a boat, or I might have thought it was a coffee table!!   Ashley

          #18333
          Paul T
          Participant
            @pault84577
            I thought it was one of those wooden insect kits.
             
            Paul
             
            #18334
            Bob Abell 2
            Participant
              @bobabell2
              I thought it was a radio controlled……………………… VENUS FLY TRAP!
               
              Bob
              #18344
              Pierre
              Participant
                @pierre
                Aaah, you guys are just old fashioned, this is the latest state of the art  tug technology!
                Must admit  that it really does look weird!
                I’m going to build it up to deck level and then test it in my pool – if it’s a waste of time then I can go onto something else.
                One aspect that has been occupying me is the control system – I have a 6 channel JR. Voith Schneider units can be configured to use either 4 channels which gives huge flexibility but is difficult to drive, or two channels which is easier to drive but loses in manoeuverability.
                To enable the SDM to go sideways, each Voith unit needs 2 channels which means (I think) using both sticks on my transmitter,up/down for ahead/astern and left/right for port/starboard.  Should be quite challenging to drive!
                Cheers -Pierre
                #18345
                Paul T
                Participant
                  @pault84577
                  It should be quite a unique model when it is finished.
                   
                  When completed can you take video of it in operation so that us fuddy duddies can see it working?
                   
                  Paul
                  #18577
                  JC Uknz 1
                  Participant
                    @jcuknz1

                    It is a “twenty-six a pede”   I think we have something similar working on our harbour.

                    #18826
                    Phil Winks 1
                    Participant
                      @philwinks1

                      Now here’s an interesting subject looks like and aquatic bumper car

                      I reckon this must be what Pierre is aiming at lovely and quirky would love to see the model working

                      #18829
                      Pierre
                      Participant
                        @pierre
                        Hi Phil
                        Spot on – thats exactly what I’m building. Not a lot of information on these tugs , there are about eight in the States and two in Spain. Seabulk owns the patent and if anyone is interested  their website has very interesting videos on these tugs.
                        The build  is progressing slowly:
                        Side planking almost completed.

                        Bottom plating completed, showing the two skegs – centre panel is 4mm plywood, side panels 4mm balsa.
                         
                        A question for the collected wisdom of the listers – I’ve completed the planking (balsa) and sealed it with 5 coats of sanding  sealer. Then I coated it with one coat of  fibreglass resin, inside and out. I hate working with glass cloth and am inclined just to give it a second coat of resin without cloth. Question: how much strength does the cloth impart to the structure?
                        TIA – Cheers – Pierre
                         
                         
                        #18833
                        David Meier
                        Participant
                          @davidmeier28154
                          Hi Pierre.
                          What an interesting model subject; it is looking great.
                           A membrane will strengthen it considerably, especially to prevent cracking on the acute corners. Someone on this forum suggested nappy liner instead of fibreglass, I have tried it and it is very workable and a lot nicer to use than fibreglass cloth. Tom told me he uses stocking or pantyhose stretched over and resined or painted over, that would work very well on your shape hull.
                           
                          Cheers.
                          David. 
                          #18877
                          Pierre
                          Participant
                            @pierre
                            Hi David
                            Thanks for the advice, pantyhose sounds like an excellent idea – especially as my wife is away in NZfor a while!
                            Pierre
                            #18881
                            Bob Abell 2
                            Participant
                              @bobabell2
                              How about that fabric stuff, the aircraft chappies use?
                               
                              It`s called “Solar something or other” and you use a hot iron to apply it……………and then paint it………………….Ideal for beefin` up balsa wood!
                               
                              Another good idea from Waldorf
                               
                              #18889
                              Phil Winks 1
                              Participant
                                @philwinks1
                                Bob I as an aero chappie my self I wouldn’t recommend solafilm not that durable and most don’t take paint that well (highly glossed) however solatex (which I think your refering to) is A) heavier and B) textured so would give strength and takes any sort of paint you want to through at it. However getting it to wrap smoothly over the complex curves of a hull is an aquired art form in itself. My personal recommendation to substitute Glass skinning is a product called poly-c (just google that to find it) simply its water based varnish with added adhesives and is used in conjunction with either tissue (use a heavyweight one on boats) or glass cloth or nylon cloth. a google search should take you RCWorlds web site and they sell all of the above the real beauty of this stuff is the ease of clean up and when set it can be sanded, will take any paint and if using glow fuel is even proof against that. I have a polystyrene foam aircraft I covered with it and it just bounces when I screw the landing up so pretty strong too.
                                On the subject of how much strength the glass cloth adds. its considerably more than just resin alone, this is in my experiance prone to cracking without the cloth reinforcing it. are you using laminating resin or just that stuff you get in car repair shops. I’m told the later causes problems by setting to fast
                                #18891
                                Colin Bishop
                                Moderator
                                  @colinbishop34627
                                  First time I’ve heard of that Phil, it sounds really useful. A bit similar to G4 pond sealer by the sound of it but probably better for modelling. Does it have a good shelf life do you know?
                                   
                                  Colin
                                  #18897
                                  Phil Winks 1
                                  Participant
                                    @philwinks1

                                    I believe its shelf life is pretty reasonable however its sold in 500ml bottles and from the look of your model I reckon you’d prob need about 3/4 of that so not that much to waste any way all the techie stuff is on this site

                                    #18900
                                    Pierre
                                    Participant
                                      @pierre
                                      Hi Phil
                                       
                                      That looks like a fantastic product – unfortunately I’m in South Africa and its not available here. The postage would be exorbitant..
                                      I’ve found some 2 inch glass tape which I’m going to use on the hard edges and a second coat of resin on the flat bits. As the sides will eventually be covered in rubber fendering any hard knocks should be absorbed by those.
                                       
                                      Cheers – Pierre
                                      #18902
                                      Phil Winks 1
                                      Participant
                                        @philwinks1

                                        I would’ve thought so pierre you could also try ordinary water based varnish and a little PVA mixed a friend of mine made a test wing this way and the results looked promising he reported that the tissue stuck easily and the end product was rock hard no idea what type of PVA but guess they’re mostly the same

                                      Viewing 18 posts - 1 through 18 (of 18 total)
                                      • Please log in to reply to this topic. Registering is free and easy using the links on the menu at the top of this page.

                                      Code of conduct | Forum Help/FAQs

                                      Latest Replies

                                      Home Forums Scratch build Topics

                                      Viewing 25 topics - 1 through 25 (of 25 total)
                                      Viewing 25 topics - 1 through 25 (of 25 total)

                                      View full reply list.