User manual

Aerosoft PBY Catalina 1.00 Manual
Page 47 of 100
To use this calculator page,
1. Use the angle value on Line 6, along with the desired airspeed, on the CAL 4 page to
determine the corresponding vertical speed in feet per minute.
2. Enter the desired altitude and distance from the next active waypoint in Lines 3 and 4,
respectively, of the NAV 4 page.
3. Click on the outer knob when the cursor is over the last data field of Line 4 (x1 digit), to
move the cursor to the next data field on Line 5, and activate the vertical speed mode. A
green transparent rectangle will appear behind the ANGLE annunciation. When the vertical
navigation mode is activated, the new altitude and the determined vertical speed must be
set into the KAS 297C if using the autopilot.
4. Keep the indicated altitude matched to the advisory altitude during the ascent or descent to
arrive at your chosen point in space. Use of the vertical speed hold function of the KAS 297C
is advised.
5. Alternatively, if you know the angle of ascent or descent you want to use, you can enter the
altitude and distance from the next active waypoint on the NAV 4 page and watch as the
angle increases as you get nearer to the waypoint. When the angle displayed is equal to the
angle you have chosen, vertical navigation is started as described above. Again, keep the
indicated altitude matched to the advisory altitude during the ascent or descent to arrive at
your chosen point in space.
6. You can also set the desired values for vertical navigation ahead of time and allow the KLN
90B to compute, and notify you when it is time to start the ascent or descent. Unlike above,
the user also enters the desired angle of ascent or descent in Line 5. With this additional
information the unit determines the time when the ascent or descent must be started to
travel at that angle to get to the desired point in space. This feature of vertical navigation is
activated when the cursor is moved to the angle data field on Line 5, past the ANGLE
annunciation.
7. When activated, and the aircraft is further than 10 minutes from the ascent or descent
point, the word ARMED will be displayed on the right of Line 1 as shown in Fig 1.7. When the
aircraft is between 0 and 10 minutes from the ascent or descent point, a count-down timer
will be displayed as shown in Fig 1.8. The words "VNV ALERT" will be displayed across the
screen in red between 90 and 60 seconds from the ascent or descent point to alert the user
of the impending start. This is a good time to prepare for the descent or ascent, specifically
the airspeed and vertical speed.
8. At 0 time the advisory altitude is displayed on the right side of Line 1 as shown in Fig 1.9 and
the value starts to go up (ascending) or down (descending). The user then sets the KAS 297C
altitude and vertical speed to get to the desired point in space as discussed above. Use the
KAS 297C vertical speed feature to keep the indicated altitude matched to the advisory
altitude.