(c)
If force measurements are taken, use a small spring scale (0 to 20 pounds (0-9 Kg) 1 % accuracy ). Apply force at
6.50 +/- 0.25 inches (165.1 +/- 6.3 mm) radius perpendicular within 10 degrees to a line through the center of wheel rotation.
(d)
if torque measurements are taken, use a small (0 to 100 inch-pounds 1% accuracy) torque wrench. See adapter fixture balance requirement noted below: 1) Control wheel test fixtures (protractors, etc.) must be
statically balanced such that after setup for this test the static balance of the lateral control system is not changed by more than 1.0 inch-pound (0.113 Nm), as measured about the wheel pivot at any position of rotation.
(e)
When measuring torque or force at full travel (85 +/- 2 degrees) do the steps that follow: 1) Move the wheel until the stop is just touched and measure
the wheel angle. 2) Move the wheel approximately 2 degrees back from the stop position and take the torque or force measurement.
3) Record the value reached 2 degrees from the stop and make sure the recorded values are within the required limits given below when the wheel returns from the wheel position "Clockwise Breakout": a) Torque required: 42 inches-pounds (4.7 Nm) maximum
or
Force required: 6.5 pounds (28.9 newtons) maximum.
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b) Full travel (85 degres) required: +/- 0.4 units.
4) Record the value reached 2 degrees from the stop and make sure the recorded values are within the required limits given below when the wheel returns from the wheel position "Full Travel (+85 +/- 2 degrees)": a) Torque required: 140 inch-pounds (15.8 Nm) maximum
or Force required: 21.5 pounds (95.6 Newtons) maximum. b) Full travel (85 degrees) required: +/- 2 degrees.
5) Record the value reached 2 degrees from the stop and make sure the recorded values are within the required limits given below when the wheel returns from the wheel position "Counterclockwise Breakout": a) Torque required: 42 inch-pounds (4.74 Nm) maximum
or Force required: 6.5 pounds maximumewtons) maximum b) Full travel (85 degrees) required: +/- 0.4 units.
6) Record the value reached 2 degrees from the stop and make sure the recorded values are within the required limits given below when the wheel returns from the wheel position "Full Travel (-85 +/- 2 degrees)": a) Torque required: 140 inch-pounds (15.8 Nm) maximum
or Force required: 21.5 pounds (95.6 Newtons) maximum. b) Full travel (85 degrees) required: +/- 2 degrees.
S 825-114
(11)
Operate the aileron trim switches on the P8 panel until the trim indicator shows zero units of trim.
S 225-115
(12)
Turn the control wheel clockwise from neutral to 6 units (30 degrees) of trim and back to 2 units (10 degrees). Hold it temporarily and release and do the check that follows:
(a)
Make sure that the control wheel goes back to neutral (use a tolerance of |0.4 units or 2 degrees of trim).
NOTE: Note and record how far the index mark on top of the
____ control wheel is from the center mark on the decal on top of the control column when the wheel stops.
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S 225-116
(13) Turn the control wheel counterclockwise from neutral to 6 units (30 degrees) of trim and back 2 units (10 degrees). Hold it temporarily and release and do the check that follows:
(a) Make sure that the control wheel goes back to neutral. (use a
tolerance of |0.4 units or 2 degrees of trim).
NOTE: Make sure that the control wheel test equipment does____
not cause a torque that is more than 1 pound-inch
(0.11 Nm). Measure this torque at the control wheel
pivot.
Note and record how far the index mark on top of the
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