Flytec 5030 v2.24 * - Manual (Page 50)

Flytec
5030 GPS
5.6.1 Safety Altitude ( = Alt above BG )
The display ‘Alt a.BG ‘ indicates the pilot's current altitude above (or below) the best glide
path that leads to goal. The Alt a.BG is also the altitude which he/she can safely lose when a
sinking air mass is encountered during flight and still make it to goal.
The Alt a.BG can be continuously shown in the user selected fields; it is identical with
Alt a. WP when the pilot flies with the best glide speed.
The fields Alt a.BG and Alt a.WP will switch to invers display when become positive values
during thermal circling. This information allows the pilot to leave the thermal to reach just the
goal ( Alt a.BG ) or to reach the chosen WP with fastest glide (Alt a.WP )
See lower pic. Chapter 2.7 Goto.
5.6.2 Final glide calculation with several Waypoints in between
With this Version 2.21 we've added a new User field: Alt ab.Goal . Based on the best speed
of glide, this is a precalculation of required height gains over all sectors of a route in front of
the pilot to reach the goal (= the last WP of the route) . For each sector the belonging wind
component is taken into account. Do to so the actual wind vector is used. This wind vector
will be actualized always, when flying a full circle. Of course, the instrument does not know
any future changes of wind.
5.6.3 Manual Windcomponent
In all our considerations up to now, the windcomponent Spd-Diff ( groundspeed - airspeed )
had been calculated automatically. There are some valid reasons instead of using this
automatic calculated value to overwrite the internal windcomponent which is responsible for
all speed to fly and final glide calculations with a fix manual input value.
1. The true wind outside a thermal always is stronger as the automatic detected wind by
the instrument during circling up. How much stronger depends on the vertical speed
of the thermal and if the pilot has already reached the thermals upper end. It is up to
the pilots experience to enter manually a certain head- or tailwind.
2. During a final glide even small wind fluctuations ( also evoked by yawing) can cause
differences of the precalculated arrival altitude. A manual input windcomponent will
keep the result more stable.
3. A pilot flying in high altitudes knows by experience how the wind in lower stratums
will change. He can take this into account in due time.
To enter manually the wind component press briefly F1 ( next function) until HT wind = auto
shows up. With the up / down keys your desired value can be set. But be aware: Don't forget
to change back to automatic wind component when changing your flight direction.
5.7 TEC Total Energy Compensation
What's the meaning behind this expression? Is this valid for sailplanes and what can hang
gliders and paragliders do with it? If a cyclist rides up a small hill without pedalling, it
becomes clear to everyone that he/she gained this difference in altitude from his own
momentum. It is precisely this which the TEC explains; he/she converted his/her kinetic
energy into height. If he/she rides down the hill again, the exact opposite happens; he/she
converts the altitude into speed (distance). His/her total energy remains constant. For pilots
the same applies.
If obvious gain in altitude can be achieved by excess speed reduction, the use of TEC
always makes sense. A hang glider can well gain 20 or more metres of height when pushing
out the steer bar at high speed. It would be a big mistake if this altitude gain were shown by
the vario and would even perhaps tempt the pilot to turn. A good flight instrument can
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