Cgy 750 - Expo. What Is It?

Discussion in 'Futaba CGY750 FBL System' started by smakmeharder, May 20, 2014.

By smakmeharder on May 20, 2014 at 6:24 PM
  1. smakmeharder

    smakmeharder Administrator

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    Ok we have an expo in the CGY 750, but what is it? if there is an expo in the CGY 750 does that mean that the expo in the transmitter must be set to zero? otherwise we will have a compounding expo over expo cenario. Do other FBL units have this same issue?
     

Comments

Discussion in 'Futaba CGY750 FBL System' started by smakmeharder, May 20, 2014.

    1. Dale Worthington

      Dale Worthington Active Member

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      Use one or the other, not both together. It can create a strange feel to the control loop.
       
    2. smakmeharder

      smakmeharder Administrator

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      Right! Thanks heaps for that! I will change it immediately
       
    3. simon

      simon Well-Known Member

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      Having expo in both the TX and FBL will probably be like having the physics slowed on RF, might have to try (trying to learn piroflips from that sensational video posted by @3D Heligod !)
      Simon
       
    4. The Dude

      The Dude Well-Known Member

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      For version 1.4. The 3 important settings i look at for control feel.. Of course you have your roll rates aswell..


      1: Exponential:

      Tune the exponential as desired to soften or sharpen the feel of the cyclic controls around
      center stick. As i'm sure you know... NEGATIVE values soften control feel; POSITIVE values
      sharpen control feel. Note that any exponential present in the TRANSMITTER adds to the value
      set in the CGY750. It is suggested that the exponential function in the CGY750 be used primarily
      to tune for a linear control feel, and that has been the goal of the default setting. From there if
      the pilot wishes to soften or sharpen the feel of the model around center cyclic stick, then
      the transmitter’s exponential function would best be used.

      2: Response style:

      Tunes the overall heading hold/AVCS effect of the system. Values of 8-12 n are compatible with
      moderate to aggressive flying styles and are good for most sport/3D flying. Note that with high(er)
      [RespSty] values, try to ensure that the swashplate is reasonably level prior to spool up.

      3: Stability gain setting:

      Depending on many variables such as model, rotor blade design, head speed, head damp-
      ening, and servo choice, the amount of transmitter cyclic gyro gain that the model will toler-
      ate without oscillation may be lower than the percentage that provides the most stable flight.
      If the model is observed to be oscillating or wobbling at your chosen headspeed with low
      transmitter cyclic gyro gain percentages, lowering the Stability.Gn parameter a point or two
      will allow for higher cyclic gyro gain without inducing a wobble or oscillation in the model.

      %90 of helis can be tuned for the feel you want in those 3 areas .. there are others but they are the
      main ones.
       
      Last edited: May 22, 2014

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