SECTION 40: FLAP SYSTEM

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The bellcrank jig comes in the wing kit and at this point you may have possibly misplaced it. The measurement from the bottom of the jig to the 1/4 inch hole shown in Figure 2 is 1 & 31/32 inch if you want to make your own.

Step 4: See this pdf with 4 templates for the cutout with rounding radiuses applied. Print at 100%. The outer corner dimensions on the printout should be 2.5" * 1.75".

Alternate way to install the torque tubes: instead of inserting the torque tubes like Figure 1 on page 40-5, instead slightly enlarged the holes in the wing roots so you can insert the torque tubes from the outside. Put both torque tubes in the freezer for about four hours. Then put the UHMW plastic blocks in the oven at 120 degrees F for about thirty minutes. Google says they can withstand up to 180 degrees. This made is SUPER easy to slide everything in. The tolerances losen up considerably between the plastic blocks and the steel tubes. Don't forget the central flap crank and make sure to position the UHMW plastic blocks before everything warms up.

The old flap motor (before mid 2022) has no built-in position sensor and needs an external POS-12 sensor. See section Flap_Position_Sensor