Trio Avionics EZ Pilot - v 1.9 - Manual (Page 25)

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Note: While the pilot could have gone directly back to the TRK mode to get back on course, the INT mode
provides a definite (and adjustable) intercept angle to accomplish the return to the course line. The TRK
mode uses a different turn algorithm which may extend the time required to return to the course line.
INT 345 IDS<4.1
TRK<010 KJFK
2. Going directly back to the TRK mode causes the EZ Pilot to more gradually curve back to
the DTK.
Alternatively, the pilot may choose to enter a “Direct” command into the host GPS system, thus
proceeding directly to the next waypoint rather than intercepting the original desired track (DTK).
5.5 INT Mode Operation
Assume that, while in the CRS mode, the aircraft flew 5.1 miles right of the DTK, as shown on the
display’s XTK field. Also assume that the computed switch point is 1.0 miles. The INT mode is
selected
by pressing the MODE switch to get back on the DTK. The CRS LED extinguishes, and
the INT LED illuminates and flashes at a 1 PPS rate. The following changes are present on the
display:
The XTK label changes to IDS (intercept distance)
and the value in the IDS field is 4.1 miles. This
display indicates that you are in the intercept mode,
correcting to the left and you are 4.1 miles from the switch point back to the TRK mode.
• The
CRS label changes to INT and the value in the INT field is about 25 degrees to the
left of the current desired track. The EZ Pilot selects a 25 degree intercept angle
automatically.
The aircraft is now turning left to the groundtrack commanded in the INT field. The IDS value is
steadily decreasing toward zero. After a short interval the TRK and INT values are approximately
the same, indicating a steady intercept track.
If it is desired to change the default intercept angle (25 degrees), the pilot may engage the PCS
MODE (see Section 5.6) by pressing the Remote Servo Disconnect switch and manually flying
the aircraft to the desired intercept course. Releasing the switch locks the new groundtrack as
the desired intercept angle. The L-R switch may also be used
to change the intercept angle (INT
field) while in the INT mode.
Progressing toward the DTK, as the IDS value approaches 0.0 the EZ Pilot switches
automatically from the INT mode to the TRK mode when the aircraft is 1.0 miles right of the DTK.
The EZ Pilot now is turning the airplane back to the right slightly and the XTK is approaching
0.00. The EZ pilot will now re-establish the airplane back on the DTK headed directly toward the
programmed waypoint.
5.6 Pilot Controlled Steering (PCS)
The EZ Pilot provides a convenient way for the pilot to control the course (CRS) that the airplane
flies. By pressing, and holding, the remote Servo Disconnect switch on the control stick, the
pilot can manually turn the aircraft to the desired course and, upon releasing the button, the
autopilot will track that course. The switch must be held down for a minimum of 5 seconds to
engage this feature. Holding for less than 5 seconds will cause the servo to disconnect and it will
have to be re-engaged by pressing the Servo button on the control/display unit.
NOTE: If SERVO POWER is turned on (cycled) while in the CRS or INT modes, the current TRK is snapshot as the
commanded CRS or intercept angle