Flytec 5020 v1.18 * - Manual (Page 17)

Flytec 5020 technical manual
7.7 Wind Direction and Strength
It is very important to know the wind direction and strength
before an out landing.
The wind strength can be selected within the user defined
fields. It is necessary to fly one or two complete circles as
steadily as possible. Whilst circling, the Flytec 5020
determines the wind direction and strength. The calculated
wind speed can be displayed in a user selectable field.
The instrument calculates the wind from the difference
between Airspeed and Groundspeed. Wind direction is shown
in the compass rose by a small windsock. During the landing
approach this symbol must always be at the top.
7.8 Waypoints and Co-ordinates
A waypoint is any single point on the earth’s surface that you would like to go to. The Flytec
5020 can save up to 200 different waypoints. Each waypoint can have up to 16 characters,
e.g. “Laber Airfield”. In determining the waypoint, it is also necessary to enter the altitude,
i.e. “1865” meters above sea level. We still need the waypoint co-ordinates. (Please also
refer to C3 Waypoints — Alter, Delete or Add.)
For this the Flytec 5020 utilizes the most international and commonly used geographical
maps with the name WGS84 (World Geodetic System 1984). This reference system
assumes that latitude is measured from the equator (0 degrees) to the North Pole, 90
degrees North, and to the South Pole, 90 degrees South. Longitude is measured from the
Greenwich meridian (London 0 degrees). East is positive (up to 180 degrees). West is
negative (-180 degrees).
UTM and Swiss Grid are also possible.
The Flytec 5020 also understands waypoints entered according to the standardized
convention of using 3 letters and 3 numbers. (Created by Brauniger) Example: LAB167
indicates a waypoint with the name LABxxx and an altitude of 1670 metres amsl.
In Basic settings/Coordinate format one chooses the following Input or Display formats
1) Degrees Minutes Decimal places of minutes dd°mm.mmm
2) Degrees Minutes Seconds dd°mm’ss”
3) Degrees Decimal places of degrees dd.ddddd
4) UTM ( a grid with a 1km raster in both E-W and N-S direction )
5) Swiss grid
Basically one should always try to use Nr 1) (=factory setting) because only this format is
using exactly the same calculation format as the GPS receivers do and guaranty the highest
accuracy. With the other formats rounding errors could sum up to 15 m in worst case.
The instrument calculates positions only in the WGS84 geodetic system. It is not possible to
chose other geodetic datii.
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