tungym
09-10-2008, 10:25 AM
Dear All,
I am certain most of you are familiar with the mechanical setting in flybarless head. I would like to collect more information for the best flybarless performance in terms of mechanical reoslution, rather than the electronic parts.
In conventional flybar head, the cyclic and collective ratio are almost independent, i.e. the real servo travel (not transmitter setting) is adjusted to almost 50% cyclic and 50% collective.
In flybarless mechanics with direct pushrod from swashplate to blade grip, the cyclic and collective ratio is almost fixed (in terms of mechanical ratio, as a factor is swashplate inner/outer ring ratio, pushrod length, blade grip off center distance etc.) . Certain you can adjust the servo travel limit but sacrificing the servo resolution.
I am asking because I cannot find any thread that discuss the mechanical part in great depth.
Did anyone actually measue the servo travel angle (e.g. full cyclic 10deg elev+ 10deg aileron occupy ~55deg servo travel, while full collective pitch +/- 14 deg occupies 55 deg servo travel.) This sums up to ~110 deg servo travel at extremes. This will take the advantage of utilizing all the servo travel and maximize the resolution.
Hope I can draw some of your attention.
I am certain most of you are familiar with the mechanical setting in flybarless head. I would like to collect more information for the best flybarless performance in terms of mechanical reoslution, rather than the electronic parts.
In conventional flybar head, the cyclic and collective ratio are almost independent, i.e. the real servo travel (not transmitter setting) is adjusted to almost 50% cyclic and 50% collective.
In flybarless mechanics with direct pushrod from swashplate to blade grip, the cyclic and collective ratio is almost fixed (in terms of mechanical ratio, as a factor is swashplate inner/outer ring ratio, pushrod length, blade grip off center distance etc.) . Certain you can adjust the servo travel limit but sacrificing the servo resolution.
I am asking because I cannot find any thread that discuss the mechanical part in great depth.
Did anyone actually measue the servo travel angle (e.g. full cyclic 10deg elev+ 10deg aileron occupy ~55deg servo travel, while full collective pitch +/- 14 deg occupies 55 deg servo travel.) This sums up to ~110 deg servo travel at extremes. This will take the advantage of utilizing all the servo travel and maximize the resolution.
Hope I can draw some of your attention.