Prototype build of ELLIE

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Prototype build of ELLIE

Home Forums Scratch build Prototype build of ELLIE

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  • #47608
    Paul T
    Participant
      @pault84577

      That's great Bob………..but when will Brutus and Slo Mo get on the water?

      Paul

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      #47609
      Bob Abell 2
      Participant
        @bobabell2

        Hello Paul

        SloMo will be ready in a few weeks, but Brutus could sail …..Sunday morning!

        Oh my word!…..What have I said!?

        It's such an important exciting event, it makes me really hesitant and edgy!

        But I'll bite the bullet and be a brave soldier!

        Capt Bob's finest hour!

        #47788
        Bob Abell 2
        Participant
          @bobabell2

          Hello Paul

          I`m working on SloMo again, but wating for a pair of prop shafts

          In the meantime………………………… Idle hands make work for the Devil, so they say!

          Looking at the original SloMo, I`ve noticed the outrigger boards that were fitted during sea trials and I`m thinking we may need a pair on the Ellie/SloMo?

          On the original full size craft, they only fitted one board, which was probably fitted to counteract the prop torque

          Have you any ideas or comments on this subject?

          If you are interested, could you suggest the shape and position of such a feature?

          Bob

          #47789
          Paul T
          Participant
            @pault84577

            Good Morning Captain

            I'm not sure that the outrigger boards will be required as the Ellie hull profile is different to the original Slo Mo however the question of prop torque is a valid one especially as you are fitting those high speed motors

            As we don't want the model squirreling about all over the lake I will look more closely at fitting some rudder shaped fins.

            I will get back to you this evening.

            Paul

            #47797
            Paul T
            Participant
              @pault84577

              Bob

              I've had a good look at the proposal and if you are using contra rotating propellers there shouldn't be a problem with prop torque. Even with identical props the squirrelling will be minimal and easily corrected with a slight touch on rudder stick.

              Paul

              #47836
              Paul T
              Participant
                @pault84577

                Bob

                I have been playing around with outrigger shapes and come up with this

                slo mo outriggers.jpg

                The outrigger sponsons are just in the water so they don't add any drag but they will help with stability when making tight turns.

                Paul

                #47837
                ashley needham
                Participant
                  @ashleyneedham69188

                  Flash Gordon!! I can see now that we were right to insist on some fins and so on.

                  Ashley

                  #47838
                  Bob Abell 2
                  Participant
                    @bobabell2

                    Hello Paul

                    Very interesting add on?…….The floats look a bit small though?

                    The rudder on SloMo is about 50mm behind the transom…..If that is important

                    How do you think SloMo will perform as she is at present?

                    From memory, John Cobbs racer had something like these outriggers?…..I wonder why?

                    Any chance of an ISO?

                    Bob

                    #47839
                    Paul T
                    Participant
                      @pault84577

                      Captain Bob

                      The floats are only to aid the turning and positioned in the correct place for your extended rudder.

                      Your Slo Mo should perform perfectly well in its present layout.

                      The Cobbs racer was a stepped hydroplane and had a different shaped hull (shorter and narrower) the outriggers prevented it from rolling.

                      Cant do an ISO at the moment as I am busy with detailing the monster Thor.

                      Paul

                      #47851
                      Bob Abell 2
                      Participant
                        @bobabell2

                        Bob in the saw shed to Drawing Office

                        Got two large blocks of balsa for the Outriggers

                        We are liking the Crusader style of Sponsons and ask you………Any comments before we get chopping?

                        If we make them on the large size, we can always reduce them later

                        Here`s a crackin` picture!………..Bob

                        crusader.jpg

                        #47852
                        Bob Abell 2
                        Participant
                          @bobabell2

                          For interest……

                          John Cobb`s record attempt on Loch Ness in 1952

                          **LINK**

                          Bob

                          #47854
                          Paul T
                          Participant
                            @pault84577

                            Hi Bob

                            I think that you have already sold yourself on the idea and so the only advice I can offer is to keep the connecting pylons as high as possible.

                            Paul

                            #47856
                            Bob Abell 2
                            Participant
                              @bobabell2

                              Hello Paul

                              Thanks for the Email stuff and advice etc

                              Just roughed out the sponsons and they are probably are too deep, but it`s a starting point

                              Got time to spare at the moment, while waiting for the prop shafts to arrive

                              One nice feature is that the support tubes can be horizontal and can pass through the hull for easy fitting!

                              Imagine the sponsons to be bright red with plenty of ali rivets showing through……….Nice!

                              Any comments?………Anybody?

                              The method of attachment is rather neat and tidy

                              As Paul says, they won`t increase performance but may be needed for high speed turns

                              Bob

                              crusader sponson.jpg

                              #47859
                              Andy C
                              Participant
                                @andyc56856

                                Hi Bob

                                Is it me or the photo, but they look a little high. Not quite in the water. Other than that, looking good, can imagine them in bright red, flashing through the water.

                                Andy

                                #47860
                                Bob Abell 2
                                Participant
                                  @bobabell2

                                  Thanks Andy

                                  Just not quite touching the water may be the correct setting?….According to the drawing office?

                                  But not to worry……I'll make the height adjustable!

                                  Bob

                                  #47863
                                  Paul T
                                  Participant
                                    @pault84577

                                    Hi Andy

                                    The drawing office, in its ignorance of frivolities, regards the sponsons as turning stabilisers and as such our opinion is that they should be just above water level so as not to induce extra drag when the boat is accelerating forward.

                                    However if the workshop wished the floats could be made large enough to contain motors / propshafts to provide extra power……..now there's a thought.

                                    Paul

                                    #47864
                                    Bob Abell 2
                                    Participant
                                      @bobabell2

                                      As a matter of fact, the frivolities originated from the Drawing Office!

                                      If we care to look back to last week, I referred to the original SlowMo having one running board and I mentioned that I fancied a pair of running boards on my SloMo……..I was referring to a pair of veneered flat sponsons at water level to give the model a talking point

                                      I mentioned to the drawing office that it would be nice if they designed a pair of stylish boards

                                      Are you taking notice Mr Chief Designer?

                                      So the drawing office dives in with both feet and comes up with a pair of frivilous sponsons!

                                      Thinking that the DO likes the idea of frivilous sponsons, I now go along with the new master plan!

                                      So I make a pair of frivilous sponsons to see how the idea looks and I get shot in the back!……BANG!…..Arrrrgh!

                                      Ha! Ha!…..I'm only having a bit of fun, putting the record straight and Paul in his place!….Friviolities, indeed!

                                      I've always liked the Crusader sponsons, So I'll go along with them for the time being….They are easily removed

                                      Bob

                                      #47866
                                      Andy C
                                      Participant
                                        @andyc56856

                                        I like them, adds an air of … something, not sure what, futuristic fun maybe. But could also be critical in helping SloMoRiverCruiserStarship (mixed identity or what!!!) from falling over in its first turn.

                                        I like Paul's idea of extra motor in them…….MORE POWER.

                                        Keep it up Bob, we love the creative thinking processes. where do you think the Gup Bcame from.

                                        Andy

                                        #47869
                                        Bob Abell 2
                                        Participant
                                          @bobabell2

                                          I like your appreciation of nautical beauty, Andy…..And words of encouragement, you can call in anytime!

                                          Bob

                                          #47874
                                          Amy jane September
                                          Participant
                                            @amyjaneseptember49770

                                            Utter madness, but great fun none the less!

                                            Good to see a man enjoying is hobby (when do you get time to eat or sleep?)

                                            Envious Amy

                                            #47879
                                            Paul T
                                            Participant
                                              @pault84577

                                              'Thinking that the DO likes the idea of frivilous sponsons, I now go along with the new master plan!'

                                              There's a plan? surprise

                                              #47880
                                              Dave Milbourn
                                              Participant
                                                @davemilbourn48782

                                                "Frivolous sponsons" sounds like something Prof Stanley Unwin might have come out with. Anyone remember him? An acknowledged master of tom-foollery.
                                                DM

                                                #47881
                                                Paul T
                                                Participant
                                                  @pault84577

                                                  I remember him and his ability to 'throw a Spaniard into the works'

                                                  Kudos to the one that can connect the dots and make the link to a working class hero

                                                  Paul

                                                  #47882
                                                  Bob Abell 2
                                                  Participant
                                                    @bobabell2

                                                    My plan, Paul is to make a nice looking model, where no pond is big enough to go flat out!

                                                    We always thought that SloMo may be a bit unstable, so we've made sure it won't be!…….Hopefully

                                                    We've even thought about Brutus having outriders too, which are actually fitted to the full size Sea Axe boats

                                                    The design of the SloMo sponsons has turned out very slick and easy. The supports pass through the hull, using screwed rod, spacers, washers and the sponsons……Very neat and very rigid too!

                                                    The same construction will apply to Brutus also, when required

                                                    Just got to bite the bullet and decide where to drill the hull!

                                                    All good fun in the meantime…..Bob

                                                    #47884
                                                    Bob Abell 2
                                                    Participant
                                                      @bobabell2

                                                      I claim the Kudos……Was it John Lennon the Beatle?

                                                      He wrote the book…." A Spaniard in the works " and " A Working class hero "

                                                      Impressive eh?

                                                      Bob

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