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Home Made DIY CG Stand

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    #1

    Home Made DIY CG Stand

    [IMG]

    After struggling with locating proper CG I figured that its time for a proper CG Stand. You can use Heli shaft like this one and insert it into a wooden block. Make two like this and use it to get the CG right once and for all.

    [IMG]

    Now you can eliminate one more error when the plane still cannot fly straight and stop using the finger method which is quite inconsistent.
    Scratch building is more than cutting balsa wood and gluing them. Its a complex process that will test even the most resilient of people
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    #2
    Unlike acrobatic planes, glider CG are more critical. This is main due to the high aspect ratio and when gliding without power. Some times that 2 - 3mm make a whole world of different for narrow wing chord.

    JH sell the CG balancer but I just could not bring myself to buy it. Even with 20% discount.

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      #3
      How about this one? http://www.greatplanes.com/accys/gpmr2400.html
      Share the joy of flying . . .

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        #4
        Use Heli-shaft ...

        Why not just put a nail with a flat head ?


        But i think i know why.. so we got more reasons to buy new motors ! ha ha...

        Comment

          #5
          Originally posted by chessgame View Post
          Use Heli-shaft ...

          Why not just put a nail with a flat head ?


          But i think i know why.. so we got more reasons to buy new motors ! ha ha...
          Heli shafts becos I have lots of slightly bent ones and sitting there doing nothing so make some use of it. Commercial stands too expensive. You will still need a bubble leveller to check the final horizontal position, eyeball is just not accurate.
          Scratch building is more than cutting balsa wood and gluing them. Its a complex process that will test even the most resilient of people

          Comment

            #6
            Also the nail is not long enough , the fuselarge is touching the floor.
            Scratch building is more than cutting balsa wood and gluing them. Its a complex process that will test even the most resilient of people

            Comment

              #7
              Originally posted by chiadennis View Post
              Unlike acrobatic planes, glider CG are more critical. This is main due to the high aspect ratio and when gliding without power. Some times that 2 - 3mm make a whole world of different for narrow wing chord.

              JH sell the CG balancer but I just could not bring myself to buy it. Even with 20% discount.
              You are right! That 2mm did make a lot of difference, after the 2nd flight with roller coaster effect, I made the CG stand and got it spot on and flew it again. This time the glider behaved and glided straight with slow descend rate. No more struggling with the elevator stick
              Scratch building is more than cutting balsa wood and gluing them. Its a complex process that will test even the most resilient of people

              Comment

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