Table of Contents
Advertisement
will be required until you are ready for unlimited
and advanced 3-D flight. Before attempting any of
the ADVANCED FLIGHT TRIM procedures you
must be completely comfortable with inverted and
knife-edge flight. The following trim sequence is
very time consuming and you may not be able to
complete it in one day. Every change made during
this procedure will affect all others so it will be
necessary to start the procedure from the beginning
after each adjustment.
ADVANCED FLIGHT TRIM
All the following tests should be performed at 80%
power unless noted.
C.G. Fine Tuning:
Roll inverted, neutral elevator, if the model
descends move the C.G. aft. If the model climbs
move the C.G. forward. 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.
12
Advertisement
Table of Contents
