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"Balance Bug" CG Plane Balancer

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  • #21
    What an interesting device, I haven't seen that before for RC.

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    • #22
      I can't really comment on any of the cg balance devices as I have never used one. I've always used my fingers and never had a problem at any time. It may not be pin point accuracy of a purpose made machine, but it is close enough to fly the model and adjust after flying. Either more weight forward or rearwards.

      Martin.

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      • #23
        Hi JohnnyJet,

        I've seen the device you are referring to, and you are quite right the full size are balanced this way. Yes it is a great tool for balancing large models which can be difficult to do.

        Martin.

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        • #24
          Originally posted by Martin.MotionRC View Post
          I've always used my fingers and never had a problem at any time.
          Best wash your hands before dinner.
          (Punch line to an old adolescent joke .......................... "By the grace of God and with a little help from these two fingers, I got it all back in." If you don't know the joke, it's OK. It was a groaner anyway.)

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          • #25
            Originally posted by DEZLPWR View Post
            Well call me foolish, but I am going to pony up the cash for the EZ Balancer Lite. Heard back from the owner and he said that they have accurately balanced planes weighing less than 1lb.
            I plan on buying more planes in the future, so I will put it to good use for sure....

            http://www.ezbalancer.com/id74.html
            A friend of mine has the bigger version of this one. I've borrowed his a time or two (when working on bigger planes) and it works very well. Personally I think they are over priced especially the one for the larger models. If it was the same price as the "Lite" I'd buy one.

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            • #26
              I have the EZ Balancer plus, I do have aircraft that top out at 69 lbs. and wing spans of 120 plus inches. Its a must for very large aircraft. For the smaller aircraft I use the GP CG machine which does good for small airframes.

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              • #27
                For large aircraft I use 3 scales. Prop the plane up level if its a taildragger. One wheel on each scale and a little math and you know the CG

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                • #28
                  Originally posted by fhhuber View Post
                  For large aircraft I use 3 scales. Prop the plane up level if its a taildragger. One wheel on each scale and a little math and you know the CG
                  That method also gives you a read on lateral balance as well.

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                  • #29
                    Many forget that CG is a point in 3D space.

                    And when dealing with Pattern competition aircraft it does matter in all 3. CG too high or low causes roll with rudder in knife edge.

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                    • #30
                      i made this years ago and it's very easy to use when balancing larger models. I had the stuff on hand so cost was zero.
                      Tom

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                      • #31
                        Here's a closer though blurry shot of the pivot.
                        Tom

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                        • #32
                          Good job Pogo, I've been thinking of doing that as well, nothing fancy, just give me the CG.
                          I have a Great Planes balancer that works fairly well, but there's nothing like wrestling with it then you're trying to hover a 1600 mm airplane above it while trying ti get the rulers to stay in the right position.
                          Many a colorful metaphor has been created while attempting this......

                          Grossman56

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                          • #33
                            Ah yes the GP balancer dance.

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                            • #34
                              Originally posted by boomer108 View Post
                              Ah yes the GP balancer dance.
                              Been there done that.

                              Mike

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                              • #35
                                Originally posted by Grossman56 View Post
                                Good job Pogo, I've been thinking of doing that as well, nothing fancy, just give me the CG.
                                I have a Great Planes balancer that works fairly well, but there's nothing like wrestling with it then you're trying to hover a 1600 mm airplane above it while trying ti get the rulers to stay in the right position.
                                Many a colorful metaphor has been created while attempting this......

                                Grossman56
                                Yes, I like simple. The pivots only go maybe 20 degrees forward and back so the model won't slide off- it's stable enough that I've shifted batteries around with the plane on the balancer , for example this 13 lb. B-17.
                                Tom

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                                • #36

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                                  • #37
                                    Originally posted by DEZLPWR View Post
                                    Well call me foolish, but I am going to pony up the cash for the EZ Balancer Lite. Heard back from the owner and he said that they have accurately balanced planes weighing less than 1lb.
                                    I plan on buying more planes in the future, so I will put it to good use for sure....

                                    http://www.ezbalancer.com/id74.html
                                    This looks much better than the Great Planes machine that I have. I think the GP is grossly overpriced and a bit finicky.

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                                    • #38
                                      Originally posted by BILLY BOY View Post

                                      This looks much better than the Great Planes machine that I have. I think the GP is grossly overpriced and a bit finicky.
                                      'Grossly' is an understatement- you can make a more accurate one with some good aluminum tube, some aluminum angle, some rubber tips and a few threaded studs with knobs.

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                                      • #39
                                        I've had great success utilizing the GP balancer with each of my planes..and I'm pretty OCD. If pictures on the wall are outta balance, even slightly, I will notice and have to reset them. Most of the time I can eyeball the center within 1/16-1/8 of an inch. Drives the wife crazy(er) then me! So far, I've yet to have to trim my elevator(s) much at all. Have done the 'GP balancer dance', but now I just get my son to stand by the tail end while I set my rulers to specs. With the Corsair, I was able to get it right on manufacture's suggested range of 85mm-90mm. Wheels up at one point and wheels down on the other. Works well enough for me.

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                                        • #40
                                          + 1 for a home-made Vanessa CG machine. If you do any kind of modeling or building at home you probably have all the ingredients just lying around the workshop. Works great.

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