Flytec 4030 * - Manual (Page 24)

Flytec
Weighting of the wind component compensation: (0%, 25%, 50% and 100%). The tail wind
or head wind component during the MacCready nominal flight is only taken into account at the
percentage given here.
For example: if the tail wind component is 30 km/h and if the weighting
is set at 50%, the instrument calculates with an tail wind component of 15 km/h in the final
approach. This value cannot be set in the instrument but only via a PC. Factory setting: 50%.
Final approach
Theory
Introduction
When the pilot is approaching his destination, it is important to find out when to start his final
approach. He must begin it in quiet air as soon as the desired glide ratio harmonizes with the
best glide of his craft (final approach according to MacCready zero). However, if he is already
in a thermal, he can reach his destination more quickly if he climbs higher and the desired glide
ratio is less than his best glide before he begins his final approach. He can then approach his
destination at a higher speed (final approach according to MacCready thermal).
The distance used by the final approach computer always refers to the next waypoint that is
being approached and the destination altitude set in the flight instrument is always used as
the altitude. The final approach data is thus only meaningful if the next waypoint being
approached is the destination.
If the pilot activates the final approach computer and approaches the destination at almost
constant altitude, the flight instrument will signalize the moment for the final approach at
MacCready zero (best possible glide). If the pilot enters a thermal shortly after, he should defi-
nitely exploit it as the flight instrument will calculate and signalize the new (better) moment for
the final approach.
Final approach computer display
A) Optimum glide ratio < nominal glide ratio
B) Optimum glide ratio > nominal glide ratio (calculation of the optimum point in time
for your final approach)
If the desired glide ratio corresponds to the craft’s best glide ratio, taking into consideration
Operating Instructions FLYTEC 4030 23
m/s
Vario integrator Nominal glide ratio
8 sec onds 4 sec onds
0
1
2
3
4
-1
-2
-3
-4
Vario
0
1
2
3
4
-1
-2
-3
-4
thermal
integrator
Last
m/s
Nominal glide ratio
8 Sekunden 4 Sekunden
Vario integrator
Mac Cready
Final approac h
Final approac h
Mac Cready
Blink:
thermal
A) B)
zero
Picture 3
Ascent phase: