gyros in use on model boats

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gyros in use on model boats

Home Forums Scratch build gyros in use on model boats

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  • #61531
    mike farrell
    Participant
      @mikefarrell21522

      Hi All I wish to find out if any member has used a gyro to keep a boat level .I,m still working on plans to build a very fast catamaran and remark by a member suggested that using 2m Ducted Fans as extra drive might cause the bows to rear up ? so am thinking to use 2 Ducted Fan Jets to help stabalize the boat. They would be centred fore and aft so would need a third stick to control with 2 hands could become difficult .

      A friend who flys a helicopter suggests trying a Gyro as it can be set on a decent radio to keep a craft level

      To Paul thanks for putting thoughts in my mind .

      Any thoughts would be appreciatedwinkMichael

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      #7048
      mike farrell
      Participant
        @mikefarrell21522

        using gyro on boat

        #61535
        mark69
        Participant
          @mark69

          Hi mike ,what you hoping the Gyro would do for your boat ? As there isn't any bow /stern control I'm guessing it won't work unless you can somehow build in canards in the bow attached to the Gyro ,good luck but they belong in aircraft with 4way axis of movement really !!!! ….mark

          #61539
          Paul Freshney
          Participant
            @paulfreshney24971

            Page 54, September 2011 MB had a short piece by Glynn Guest raising this concept of the use of gyros to keep a model boat on the correct heading, as he is also a keen model flyer.

            I do not know whether he has progressed the idea since then, but I know he uses the inbuilt mixing facility on a 'computer' transmitter to improve the manoeuvrability of his latest twin screw, twin esc, model.

            Paul Freshney

            #61543
            David Wooley
            Participant
              @davidwooley82563

              I seem to remember gyros being used some 40 years ago by the straight runners ,

              Dave Wooley

              #61546
              Paul T
              Participant
                @pault84577

                Hello Michael.

                I remember our conversation about using ducted fans in multi hulls and its great to hear that you are proceeding with the build.

                Given the way that these electronic gyros work I'm not sure that it will make any appreciable difference in controlling the attitude of your catamaran as the positive air pressure that the fans create between the hulls should provide sufficient 'self levelling'.

                Can you post some photos?

                All the best to you and Elaine

                Paul

                #61547
                mike farrell
                Participant
                  @mikefarrell21522

                  Hi All Firstly thanks for your replies

                  Secondly as Glyn Guest suggested we should firstly research our subject ,I did and have a sketchy understanding of a (gyro) usages During my search I found Radio Controlled Racing Cars now some use gyros to keep cars on a straight line as use of Brushless motors and Lipo batteries made the cars difficult to control .

                  All that said I had better explain how I will use a gyro.

                  2 Ducted Fans will be placed fore and aft in the middle of the hull ,they will activated when the catamaran is up to speed when they will be activated .

                  They need to be controlled to keep the boat level whilst in motion (as Ashley some time ago said I may have trouble with the boat lifting when extra power is applied.

                  One stick on radio will be used to control the drive train and via a V.tail unit control the steering

                  Stick 2 will be used to control the Ducted Fan Jet located up in the superstructer so the need for a giro which will be set in the radio

                  Thanks Paul for activating my mind as after the loss of my son I needed something to get my mind off our loss . built a mock up which was too heavy and needed to rejig the hull so it will be a little longer before a proper model will be started .It will be built in 3mm light ply (I used 9mm for formers not the best decision) .I have ordered 2 extra Ducted Fans and 1 extra speed controller

                  Paul Freshney ,yes it also means buying a new computerised radio .

                  Hope I,ve made my intentions more clear winkMichael

                  #61558
                  Paul T
                  Participant
                    @pault84577

                    Hi Michael

                    Sounds good to me.

                    What size is the catamaran and how is Elaines narrowboat coming on?

                    Paul

                    #61565
                    sammyk
                    Participant
                      @sammyk

                      Hi mike in my opinion just throttling the engines will not be fast enough to alter the pitch of the hull,i think trim tabs controlled by servos would work better.it will be easier to adjust and more consistent .regards sammyk               p s

                      it may need a front wing controlled with a servo linked to the rear trim tabs aka formula one cars

                      Edited By sammyk on 25/11/2015 19:35:53

                      #61568
                      mike farrell
                      Participant
                        @mikefarrell21522

                        Hi Sammyk .Further explanation is required .

                        There will be 2 Ducted Fan Jets in the hull ,fore and aft. The DFJ are there to lift the catamaran when up to speed when they will lift the catamaran up in the water to present less drag hopefully giving more speed . I believe that could cause the boat to become less stable .

                        A gyro will act extremely fast as I have observed in my friends Helicopter .

                        All this is new to me but if I don't try I,ll never know

                        Hope that makes some sense winkThanks Michael

                        #61570
                        Paul T
                        Participant
                          @pault84577

                          Hi Michael

                          It makes perfect sense to me, as far as stability goes just follow the tried and trusted method of keeping the heavy items as low in the hulls as possible.

                          I had a play with my quadcopter this morning just to get a better notion of how your idea would work and the only downside that occurred to me could be the power load placed on the gyro by the fans.

                          I am looking forward to seeing this boat in the water.

                          Paul

                          #61574
                          Bob Abell 2
                          Participant
                            @bobabell2

                            Hello Mike

                            I can't make head nor tail of what you're making or even talking about!

                            We need a few pictures please

                            Bob

                            #61592
                            mike farrell
                            Participant
                              @mikefarrell21522

                              Hi Bob The best way I can show you what its to relate to the( U tube of the American X-Craft " Seafighter " )

                              I was excited with the thought that I could make a model of a very fast craft ..To build a catamaran which could speed across the water .The cost to make a drive train powerful enough to drive the boat was excessive ,hence the thought to fit 2 Ducted Fan Jets up in the body of the boat to give me more thrust.

                              The original plan was to have a fast small boat deposited from the Catamaran body ,after a word with Paul I looked into the idea of 2DFJ mounted in the floor of the boat to help with lifting the boat when up to speed to cut down the drag on the bows ..I reasoned I would need to be able to control the lift and stability of the DFJs .

                              Hope if you take a look at the U.Tube film of the X-Craft it will explain better winkMichael

                              #61600
                              Paul T
                              Participant
                                @pault84577

                                Bob

                                The theory is that in much the same way a hovercraft rides on a pressurised cushion of air a catamaran could ride higher in the water by introducing positive air pressure into the void between the two hulls.

                                The ducted fans provide enough thrust to maintain the positive pressure despite venting by the bow and stern.

                                Paul

                                #66648
                                Derek Round
                                Participant
                                  @derekround14803

                                  Hi All,

                                  I am using a gyro to stabilise a boat in "roll". I use an aircraft term here, to make things as clear as I can.

                                  Being a long time heli pilot, it hasn't been that difficult using a heli gyro, in heading lock/hold mode, controlling a shifting lead weight that is servo controlled.

                                  The boat is a semi-scale WW1 German MTB, long and thin, and at speed (I like speed!) it rolls randomly in a straight line and rolls badly with rudder input, I think because there is so little of the hull in the water.

                                  There are issues at the moment with "drift" with time, but the boat is much more stable when the gyro is operating than previously.

                                  Anyone interested? Or has anyone else done something similar out there?

                                  Derek

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