Flytec 5020 v1.18 * - Manual (Page 15)

Flytec 5020 technical manual
advantage that it is not subject to any grid deviation and does not show any deviation as a
result of iron or any magnetic material either. Its zero point always corresponds with true
geographic north (0 or 360 degrees). The course that is the flight direction (= Track), is
calculated from your movements.
If the user remains stationary at the same location, then the course and compass needles
are inoperative. The exact course (that is the direction in which the user travels over ground)
is always at the top of the compass, but can also be read in the display “Track”. When
circling in a thermal the compass rose appears to turn; in reality the needle does not move;
the unit along with the aircraft, moves around the rose.
7.3 Track and Bearing
As is the convention with GPS receivers, the Track is defined as the route of the aircraft over
ground. Geographic true North is always 0 or 360 degrees (East 90, South 180, West 270
degrees). The bearing is the direction to a specific destination or waypoint from the aircraft,
expressed in the same way as above.
Note: A Tracklog is the result of recording many different position points during a flight.
7.4 Groundspeed
The GPS receiver fixes its position once every second. Speed over ground is derived from
the distance between these positions. Only from the difference between airspeed and
groundspeed can one make conclusions about the wind’s influence, and ultimately these are
the most important pieces of information a pilot needs during flight. The ground speed should
appear at all times in an user selected field.
7.5 Glide Ratio (=L/D Ratio)
By definition, the glide ratio is calculated by taking the horizontal distance travelled and
dividing it by the height lost.
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