ADVANCED FLIGHT TRIM
All the following tests should be performed at
80% power unless noted.
C.G. Fine Tuning:
Roll inverted, neutral elevator to two clicks of
down trim, if the model descends move the
C.G. aft. If the model climbs move the C.G.
forward. C.G. movement should be no more
than ¼-inch at a time.
Engine Thrust Angle Right/Left:
On a low pass 50% power directly into the
wind, go to 80% power and pull to a vertical
line at the same time. As the model slows do
not correct the path with rudder. If the model
yaws right add 1/16-inch shims under the right
side motor mount bolts at the firewall. If the
model yaws left place the shims under the left
side.
Main Wing Incidence:
Roll to knife-edge flight, if down elevator is
required to maintain a straight line, shim the
back of the main wing 1/8-inch at a time till
the elevator is neutral. If up elevator is
required shave the rear of the wing saddle 1/8-
inch at a time.
Engine Thrust Angle Up/Down:
On a low pass 50% power crosswind, go to
80% power and pull vertical at the same time.
As the model slows do not correct path with
elevator.
If the model tries to loop add 1/16-inch shims
to the top motor mount bolts. If the model tries
to push over to the wheel side, add 1/16-inch
shims to the lower motor mount bolts.
Wing Tip Weight:
Level flight into the wind, roll inverted neutral
aileron. If one wing drops add weight to the
other wing tip 1/8-once at a time.
Elevator Surface Alignment:
Fly away from you directly into any wind,
apply full throttle and pull two consecutive
loops. Model rolls right, raise left elevator,
model rolls left, raise right elevator.
