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This is a great way to level your swash.
Quoted from this thread: best way to level swash... Not only is it important to get the swashplate level, but it is equally important to get the flybar paddles perfectly square to the swashplate. Since the paddles out run the swashplate when you give a cyclic command the paddles are the best choice as a tool to align the swashplate and for checking alignment at both ends of the collective range. Here is basically how I do it. Put your collective stick at half stick. I generally do this on throttle hold as my collective range is maxed out there, but you 3D guys would want to do this on the idle up that you use for 3D stuff. Put a pitch gauge on one paddle and set the gauge to 0. The flybar should be perpendicular to the tail boom as we are trying to get the swashplate level in the fore and aft axis first. First eyeball your swashplate and adjust the linkages and get it as close as possible. Don't forget to 0 out any sub trims and normal trims. Look at the pitch gauge against the top of the rotorhead and adjust your paddle if necessary. Now rotate the rotorhead 180 degrees and view the pitch gauge again. If it is not perfectly square to the head adjust the swashplate angle slightly by adjusting the pushrods. Realign the paddle and recheck. Adjust until you can view that paddle from either side and the gauge stays level with the head. Once this is accomplished put the gauge on the other paddle and adjust it to the top of the head. You only need to view it from one side since we have already squared the swashplate with the other paddle. Now we know our paddles and swashplate are square to each other and square to the mainshaft. Now rotate the rotorhead so that the flybar paddle is over the nose of the helicopter and adjust the linkage for right and left cyclic. Once your through with getting everything level at half stick you can move the collective up and down while watching the pitch guage to see if you need to adjust the atv's to keep the swashplate level at top and bottom collective. This is the way a lot of us F3C or contest guys do it now days when everything has to be perfect. Bubble levels will get it somewhat close, but the pitch gauge never lies. Wayne Mann End Quote
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