Step 15
21
Making Adjustments—Plane Turns to the Left or Right
Step 14
20
A. If the Firebird IIST
™
keeps turning to the left
and adjusting the trim control lever (page 17)
does not correct enough to fly straight with
the stick at neutral:
1. Adjust the control line so that the left tail flap
is 1/16" above the rest of the tail surface.
2. Test fly.
3. If it still flies to the left, repeat the above
procedure, adding 1/16" each time until it
flies straight.
Note: Always make these adjustments after
powering up the plane and transmitter, but
before
arming the motor.
B. If the Firebird IIST keeps turning to the right
and adjusting the trim control lever (page 17)
does not correct enough to fly straight with
the stick at neutral:
1. Adjust the control line so that the right tail flap
is 1/16" above the rest of the tail surface.
2. Test fly.
3. If it still flies to the right, repeat the above
procedure, adding 1/16" each time until it
flies straight.
Important: If there is a bend (even a small one) in the tail or wing or a tear near the flap areas, it is
impossible to have correct flight control. Replace the damaged part immediately!
Making Adjustments to the Climb Rate
A. If the Firebird IIST
™
(with a fully charged
battery) does not climb fast enough with full
throttle, you can adjust the climb rate by:
1. Tightening the front tail screw in one full turn
and loosening the rear tail screw one full turn.
2. Test fly.
3. Repeat the above procedure if necessary
until the Firebird IIST climbs adequately
under full power.
B. If the Firebird IIST climbs too fast with full
throttle by climbing at a steep angle, stalling
and keeps repeating climbing sharply and
stalling, do the following:
1. Loosen the front tail screw one full turn and
tighten the rear screw one full turn.
2. Test fly.
3. Repeat the above procedure if necessary
until your Firebird IIST climbs at a steady rate.
Screw In
Screw Out
Screw In
Screw Out
5952_HBZ Firebird IIST Manual 8/8/03 4:27 PM Page 20
