Great Planes Ultra Sport 60 Kit - GPMA0420 Pages 28-48 - Manual (Page 17)

FLIGHT TRIMMING CHART
TRIM FEATURE MANEUVERS OBSERVATIONS CORRECTIONS
CONTROL
CENTERING
CONTROL
THROWS
ENGINE
THRUST
ANGLE
1
CENTER OF
GRAVITY
LONGITUDINAL
BALANCE
SPLIT ELEVATORS
(Also Yaw and
C.G.)
YAW2
LATERAL
BALANCE
AILERON
RIGGING
WING
INCIDENCE
Fly general circles and
random maneuvers.
Random maneuvers.
From straight flight,
chop throttle quickly.
From level flight roll to
45-degree bank and
neutralize controls.
Into wind, pull open
loops, using only elevator.
Repeat tests doing outside
loops to inverted entry.
Into wind, do open loops,
using only elevator.
Repeat tests doing
outside loops from
inverted entry.
Into wind, do tight inside
loops, or make straight up
climbs into Hammerheads.
Do same from inverted
entry.
With wings level, pull
to vertical climb and
neutralize controls.
Knife edge flight.
Try for hands off straight and
level flight.
A. Too sensitive, jerky
controls.
B. Not sufficient control.
A. Aircraft continues level
path for short distance.
B. Plane pitches nose up.
C. Plane pitches nose down.
A. Continues in bank for
moderate distance.
B. Nose pitches up.
C. Nose drops.
A. Wings are level throughout.
B. Plane tends toward outside
when right side up, and to
inside when inverted.
C. Plane goes in on regular
loops, and out on inverted.
D. Plane goes out on both
types of loops.
E. Plane goes in on both
types of loops.
A. Wings are level throughout.
B. Yaws to right in both
inside and outside loops.
C. Yaws to left in both
inside and outside loops.
D. Yaws right on insides, and
left on outside loops.
E. Yaws left on insides, and
right on outside loops.
A. Wings are level and plane
falls to either side
randomly in Hammerhead.
B. Falls o f f to left in both
inside and outside loops.
Worsens as loops lighten.
C. Falls off to right in both
loops. Worsens as loops
tighten.
D. Falls off in opposite
directions on inside
and outside loops.
A. Climb continues along
same path.
B. Nose tends to go to
inside loop.
C. Nose tends to go to
outside loop.
A. Models tends to veer
in nose up direction.
B. Model veers in nose
down direction.
Readjust linkages so that
Tx trims are centered.
If A, change linkages to
reduce throws.
If B, increase throws.
If A, thm is okay.
If B, decrease downthrust.
If C, increase downthrust.
If A, trim is good.
If B, add nose weight.
If C, remove nose weight.
If A, trim is fine.
If B, add weight to right
wing, or add right rudder.
If C, add weight to left
wing, or add left rudder.
If D, raise right half of
elevator (or lower left).
If E, raise left half of
elevator (or lower right).
If A, trim is correct.
If B, add left rudder trim.
If C, add right rudder trim.
If D, add left aileron trim.
If E, add right aileron trim.
If A, trim is correct.
If B, add weight to right
wing tip.
If C. add weight to left
wing tip.
If D, change aileron trim. 3
If A, trim is correct.
If B, raise both ailerons
very slightly.
If C, lower both ailerons
very slightly.
If A, reduce wing incidence.
If B, increase wing incidence.
1. Engine thrust angle and C.G. interact. Check both.
2. Yaw and lateral balance produce similar symptoms. Note that fin may be crooked. Right and left references are from
the plane's vantage point.
3. Ailerons cannot always be trimmed without sealing the hinge gap.