Linkage Lengths for the HK450 Helicopter

These are the recommended linkage lengths for the Trex SA which is the closest to the HK450 Helicopter.

Description of lengths

A) Main blade grip to mixing arm linkages, two required:

Rod Length 9.0mm
C to C Length 20.0mm
Overall Length 26.5mm

B) Flybar control cage to washout arm linkages, two required:

Note: These linkages come factory assembled and installed. However, be sure to confirm their length and adjust as necessary before proceeding.

Rod Length 12.5mm
C to C Length 23.5mm
Overall Length 30.0mm

C) Mixing arm to inner swashplate linkages, two required:

Rod Length 32.0mm
C to C Length 42.0mm
Overall Length 48.5mm

D) Pitch servo (front right) arm to outer swashplate, one required:

Rod Length 33.0mm
C to C Length 46.0mm
Overall Length 52.5mm

E) Elevator servo (rear) arm to outer swashplate, one required:

Rod Length 28.0mm
C to C Length 41.3mm
Overall Length 46.8mm

F) Aileron servo (front left) arm to outer swashplate, one required:

Rod Length 19.0mm
C to C Length 32.3mm
Overall Length 37.8mm