TruTrak DFC Operating Manual User Manual

Page 6

the

GPSS

mode the

autopilot follows lateral
steering or bank commands
generated by a navigation
system (EFIS or GPS).

The next sequential entry

screen is

VOR NAV

LOC NAV

depending on which is selected
by the navigation receiver. The
setup screen for this mode is
shown below.

The course numerals are
underlined. This means that the

VOR/LOC

course is to be set by

rotating the encoder. As the
encoder is rotated, knob out
equals 5

° steps while knob in

equals 1

° steps. When course

has been set press enter. The
cursor (underline) has now
moved to intercept angle. The
default value will be 30

°. The

intercept angle can be set from
15

° to 45° by rotation of the

encoder knob. When the
desired intercept angle is set,
press enter.

The selected intercept
angle is now converted to an
intercept direction according to

which side of the course the
aircraft is on.

Also, intercept direction is

underlined which means it can
be adjusted. With this feature
the system is in a selected
direction mode until the on
course turn (tracking phase) is
initiated. During the intercept
phase of the approach, the
lower left display will alternate
to show

CRS

for one second out

of five. When the aircraft is
established on the inbound
portion of the approach, the
lower left display will indicate
the selected course.

TRK 213 ALT 4500
INT 213 VS 500↑

TRK+135 ALT 4500
GPSS SVS 500+

LOC NAV CRS 183
INTRCPT ANGLE 30

If the above is

LOC NAV

and

glide slope is present (ILS),
flying below the glide slope in

ALT HOLD

mode will arm the

glide slope coupler. When this
occurs, the display will be as
shown below

TRK 213 ALT 4500
CRS 213 VS 500

When the Glide slope is

intercepted, the display will be
as shown below.

TRK 183 AH 4500
CRS 183 GS ARMED

LOC NAV CRS 183
INTRCPT ANGLE 30

TRK 183 ALT 2200
CRS 183 GS CPLD

When glide slope coupling

is terminated, by entering either
the

ALT HOLD

mode, the