Navaid Devices AP-1, Руководство пользователя

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- A.1 -
APPENDIX A
THE S-2 CAPSTAN SERVO
Decide exactly where and how the servo is to be mounted, then go ahead and do the
work. The control cable should be almost tangent to the capstan. Install the wiring, but do
not install the bridle cable yet.
CHECKING DIRECTION OF AILERON DEFLECTION
Connect a battery charger to the aircraft battery and leave it on whenever using the servo.
Flip the MODE SWITCH to the right to put the autopilot in Wing Leveler mode, and turn
on your breaker/switch. The gyro should start to wind up, and the servo should crank to a
stop somewhere.
Set the SPAN trimpot fully clockwise. Rotate the TURN CONTROL on the AP-1 for a
right turn, and note the direction of capstan rotation. When the cable is installed, this
rotation must deflect the ailerons for a right roll.
If the aileron deflection is backwards, you must reverse the direction of servo rotation.
See Fig. 4. on page 9. Swap the motor wires at the motor. Swap end connections at the
servo FEEDBACK pot—these wires are white with red tracer and white with black
tracer.
INSTALLING THE BRIDLE CABLE
Adjust both the TURN and TRIM CONTROLS for proper orientation of the indicator.
The limits of rotation of the control should stop the indicator at points equally displaced
from 6 o'clock, in which case the indicator will point straight up at the center of rotation.
Make sure the TURN CONTROL is somewhere in its dead zone, which is anywhere in
the center 10 degrees of shaft rotation. Center the TRIM CONTROL and TRIM RANGE
trimpot. Set the SPAN trimpot fully clockwise. Now the AP-1 should think the airplane is
flying straight and level, and the servo is locked into the position that it would hold for
neutral aileron.
Fig. A.1 illustrates linking a bridle cable to a control cable and securing it on the capstan
to prevent cable slippage. The cable should wrap around the capstan two complete turns.
Tension the bridle cable until the control cable just begins to go slack.