20.
q
Slide the
SHORT
end of the tail rotor bellcrank onto the end of the push/pull rod, and bolt
the bellcrank to the bottom of the gearbox with a 2-56 x ½" bolt, washer and threadlock
(use only threadlock labeled as “plastic-safe”). Tighten the bolt all the way, then back it
off ½ turn or until the bellcrank pivots freely (this is similar to the procedure for adjusting
the 2-56 bolts holding the mixing arms onto the rotor head). Make sure the push/pull rod
moves freely within the tail rotor shaft when the bellcrank is moved.
21.
q
With a tissue, clean any oil from the last 1/4" (6mm) of the push/pull rod extending from
the tail rotor shaft. Mount the gyro assembly to the end of the push/pull rod as before
using threadlock on the pivot-mount setscrew as shown in Fig. 10-5.
MAKE SURE THE
SETSCREW IN THE GYRO PIVOT MOUNT FACES DOWN, OR GYRO SENSING
WILL BE REVERSED AND THE GYRO WILL DESTABILIZE THE TAIL
. Also check
that the end of the push/pull rod does not extend out from the pivot mount and jam the
gyro spindle.
22.
q
Tilt the gyro back and forth about the pivot pins. It should move very freely. If it does not,
locate and eliminate the cause of friction or binding.
Construction Manual
Tail Boom
10-6
LITE MACHINES
1-1/16 x 1 /2” pin
Pivot mount setscrew
on bottom side!
(use threadlock)
Spider
Figure 10-5.
