|
TRIM FEATURE |
MANOEUVERS |
OBSERVATIONS |
CORRECTIONS |
|
CONTROL CENTERING |
Fly general circles and random manoeuvers |
Try for hands off straight and level flight. |
Readjust linkages so that Tx trims are centred |
|
CONTROL THROWS |
Random maneuvers |
A: Too sensitive, jerky controls.
B: Not sufficient control. |
If A; change linkages to reduce throws.
If B; increase throws. |
|
ENGINE THRUST ANGLE |
From straight flight, chop throttle quickly. |
A: Aircraft continues level path for a short distance.
B: Plane pitches nose up.
C: Plane pitches nose down. |
If A; trim is OK.
If B; decrease downthrust.
If C; increase downthrust. |
|
CENTRE OF GRAVITY LONGITUDINAL BALANCE |
From level flight roll to 45 degree bank and neutralise controls. |
A: Continues in bank for moderate distance.
B: Nose pitches up.
C: Nose drops. |
If A; trim is good.
If B; add nose weight.
If C; reduce nose weight. |
|
YAW |
Into wind, do open loops, using only elevator.
Repeat tests doing outside loops from inverted entry. |
A: Wings are level throughout.
B: Yaws to right in both inside and outside loops.
C: Yaws to left in both.
D: Yaws right on inside and left on outside.
E: Yaws left on inside and right on outsides. |
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. |
|
LATERAL BALANCE |
Into wind do tight inside loops. |
A: Wings are level and plane falls to either side randomly.
B: Falls off to left in loops, worsens as loops tighten.
C: Falls off to right in loops, worsens as loops tighten. |
If A; trim is correct.
If B; add weight to right wingtip.
If C; add weight to left wingtip. |
|
AILERON RIGGING |
With wings level, pull to vertical climb and neutralise controls. |
A: Climb continues along same path.
B: Nose tends to go to inside loop.
C: Nose tends to got to outside loop. |
If A; trim is correct.
If B; raise both ailerons very slightly.
If C; lower both ailerons very slightly. |
Welcome 
