Extreme Flight 125" EXTRA 300 Assembly Manual page 3

Wing assembly
(Please note that we highly recommend the use of 3 ultra torque servos for aileron
actuation. We did extensive testing using both 2 and 3 servos and the gain in roll and snap
performance using 3 servos is by far worth the investment in additional servos and the time
required to properly set them up).
1. First I highly recommend that you take a few minutes and go over all seams with a
covering iron on a medium setting, paying special attention to stripes and areas where
covering overlaps.
2. The ailerons use a unique pocket hinge system. There are two rods that act as the hinge
pins for this system, one inserted at the tip of the wing, the other through the root. Use a
flat head screw driver to back out the threaded portion of the rods and put a few drops of
blue Loctite on each. Re-tighten the threaded portion into the threaded insert. Make sure
to do this for both wings.
3. Next we'll install the aileron control horns. It is imperative that you pay close attention
during this step. In order to provide the proper linkage geometry each set of aileron
control horns has a hole drilled in a different location to compensate for the varying
thickness of the wing and aileron. The picture below illustrates the proper location of each
set of horns.