CN1303-4 Gas Predator Manual 2nd Edition

Step 7 Feathering Spindle & Blade Grip
#HW6182
Stiffness
Shims
Large
#HW6180A
Feathering
Spindle
thin
race
(inside)
larger ID
Round Recess
on Top
#CNBB715T
M7x15 Thrust
Ball Bearing
#HW6180A M5x10
Socket Screw & M5
Flat Washer
thick race
(outside)
smaller ID
Hobby Grease
Generally, grease is
needed for thrust
bearings and the tail
rotor gears. A light
Lithium or Silicon
grease should be
used, commonly
found at hobbyshops
for RC cars.
Remove one damper and press the feathering spindle to seat the ball near the center of the rotor hub. Reposition the
rubber damper in the rotor hub and slide one large shim against the damper followed by three regular stiffness shims and
one blade grip assembly onto the feathering spindle. The bell mixer and pitch arm of the blade grip is mounted on the
leading edge when as the head rotates clockwise. Install the M7x15 thrust bearing and lubricate the bearings with light
grease. Looking at the two steel races of the thrust bearing, note that the innermost surfaces have different widths because
the inside diameters are different. Slide the first larger diameter steel washer (thin race, larger ID) followed by the
greased ball race, followed by the second steel washer (thick race, smaller ID). Remove any grease that may have
transfered to the threads using a cotton swab dipped in alcohol. Apply L242 Blue threadlock to the inside threads on the
feathering spindle using a pin and install the M5x10 socket cap screw with washer. Do not overtighten this bolt because
it will flair the end of the spindle making removal of the blade grip nearly impossible. Repeat for the other blade grip.
Step 8 Flybar Control Yoke
M3x12 Button
Cap Screw
#HI3176C
Flybar
Control Arm
M4x5 Set
Screw
Circle Mark
presses over
steel ball.
#CNLR1006
M4x6 Micro Washer
#HW3176C Double
Studded Steel Ball
#HI3176C
Tapered
Standoff
Ball Link Direction
All ball links are molded to be installed in only
one direction. Look carefully at the hole for the
ball, one side is clean while the other side has a
circular mark, 1mm larger than the hole. The
marked side presses over the steel control balls.
Pushrod A is already assembled but check that the
length is actually 47mm (center to center). As the
pushrods are build and installed they should be checked
for tightness. Press one ball link onto each double
studded steel ball, making sure that pressure is applied
from the side of the ball link with circle mark. While
holding one flybar control arm, apply a small amount of
slow cyanoacrylate glue and thread one end of the
double studded steel ball into each standoff. When it
becomes difficult to turn with fingers, apply slow CA to
the threads and start screwing in the tapered control arm
stand-off on the other end of the ball.
6
Pushrod A 47mm
(center to center)
#HI6145 Ball Link x 2
#HW6192 25mm Pushrod x 2
A correctly installed the ball link should rotate with
some resistance when the metal pushrod is rotated in
your fingers. If the ball link to too tight the preferred
solution is to purchase Century’s ball link sizing tool
[CN2055] to custom fit each ball link to its steel ball.