Reely SKY Thunder 500 ARF Notice D'emploi page 42

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e) Installing the Gyro
For best flight results, select a very precise and fast gyro build with "heading hold".
The gyro (1) is installed behind the pitch servo (2)
above the tail rotor receptacle (3). For installation
and any possibly required precautions, observe
the information in the gyro's operating manual.
Figure 6
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