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Step 49 Upper and Lower Frame Assembly
Position the upper and lower frame assemblies, aligning the starter shaft in the clutch bell to the torrington bearing in the
clutch. While holding this in place, insert the M3x25 socket cap screws on both sides through the servo frames, position the
14mm standoffs and thread into the 26mm round threaded spacer into the forwardmost hole. The 22mm threaded hex spacer
must be positioned at the top of the vertical frame and held with pliers while installing the screws. Install the rear M3x35
socket cap screws for each side through the top lower frame holes, position the 17mm frame spacers followed by the 10mm
frame spacers and thread into the bearing block between the frames. Insert two M3x35 socket cap screws through the lower
holes, through the X frame and position two X frame spacers along with two 10mm spacers, finally threading into one 26mm
round threaded frame spacer.
10+17mm
Frame
Spacer x 4
Up to this point we have not used threadlock on any of the fasteners. Take the time now to align the clutch to the clutchbell
as accurately as possible. The upper and lower frames have been slotted to allow this adjustment. Once the clutch is parallel
to the clutchbell both fore-aft and left-right, test by slowly pulling the starter cord. Watch as the clutch turns to make sure
that it does not turn the clutchbell at any point. All the fasteners should be tightened by this point, both the frame spacers
and the M3x8 socket cap screws to attach the lower frames to the landing gear frame. Start and remove each of the frame
spacer bolts one at a time, apply L242 Blue threadlock and tighten in place. After completion, repeat the test to verify that
the clutch is still in perfect alignment. Remember to threadlock the M4 engine bolts also.
Step 50 Pushrod Assembly
Pushrod A & C have been assembled already and are included with the rotor head. These pushrods should be removed and
checked against the table and sized if necessary to properly fit the steel balls. Build the remaining pushrods following the
table and remember that most of the pushrods will have ball links that attach in opposite directions from each other, check the
location of the balls before installing the pushrod and ensure that the length remains the same. *The throttle pushrod needs
to be shorted from 104mm to 94mm taking 5mm off each end to be able to achieve the 112mm length.
All pushrods are measured
Circle Mark
center to center.
presses over
steel ball.
10+X Frame
M3x35 Socket Cap
Spacer x 2
Screws x 6
Ball links
install only in
one direction.
Location
Washout to flybar (2)
Bell mixer to seesaw (2)
Bell mixer to swashplate (2)
Front CCPM to servos (4)
Elevator arm to servo
Throttle arm to servo
Front CCPM to swashplate (2)
26mm
Threaded
Spacer
14mm Servo
Frame Spac-
22mm Threaded
Hex Spacer
Pushrod
Rod
A
24
B
15
C
80
D
104
E
80
F
104*
G
35
ers x 4
M3x25
Socket Cap
Screws x 4
Length
47
26
99
120
100
112
56.5
21
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