BVM®2016
28
09/14/2016
Center of Gravity, Control Surface Deflections and Expo Settings
The factory puts an inked C.G. mark on the
fuselage wing fairing. It is better to transfer that
location to the bottom of the fuse fairing. As the
photo shows, make a 1/16” hole 5.6” aft of the
wing L.E. at the root on the fuse. Install a small
button head screw on both sides of the fuse.
A helper is necessary to balance the model
with fuel only in the UAT and a half full 16oz.
header tank. Our demo model needed no
ballast. Minor adjustments of the ECU battery
location will suffice.
Control
High Rate Expo
Elevator (Measured at the Root)
Up 1.5
”
Down
1.25
”
Up 30%
Down
0%
Aileron (Measured at the Ail/Flap Junction)
Up 1
”
Down 0.9
”
25% /
25%
Rudder (Measured at the bottom of the top rudder)
L/R 1.4”
10% /
10%
Control
Take-Off
Position
Landing
Position
Flaps
(Measured at Fuse root)
1.2
”
3.1
”
Speed Brake
70º open
Note:
The BVM Demo plane is setup using the above Expo percentages. Positive values are
used on Spektrum and JR radios, Futaba uses negative.
NOTE: This chart reflects only medium rates for the ailerons, elevator, and rudder. Higher
rates and expo settings are at pilot
’s discretion but not necessary for safe aerobatic flight.