E-flite Brio 10 ARF - Manual (Page 52)

An important part of preparing the aircraft for flight is
properly balancing the model.
Caution: Do not inadvertently skip this step!
The recommended Center of Gravity (CG) location for
the Brio 10 is 3
7
/
8
" (100mm) to 4 3
/
8
" (110mm) behind
the leading edge of the wing against the fuselage. Use
this CG range for the first flights until you have become more
experienced.
The CG range was determined from our flight tests. The
forward range is better suited for sport and precision
aerobatics, while the aft (rear) location is for more wild
and 3D flying. You can experiment with the best locations
to suit your flying style. Quique Somenzini flies at the 4
3
/
8
"
(110mm) CG location.
Center of Gravity
52