E-flite Ultimate Fx 3D ARF - Manual (Page 36)

36
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
Ultimate FX is 3
1 /
2
" (90mm) to 4" (100mm) behind the
leading edge of the upper wing against the fuselage.
The C.G. range was determined from our flight tests using a
Thunder Power 11.1V 1320mAh Li-Po battery pack.
Center of Gravity / Battery Installation
Required Parts
Airframe
Battery
Hook and loop
 1. The battery for the Ultimate FX is located inside
the front of the fuselage behind the firewall. The
battery attaches to the side of the fuselage with
hook and loop material.