Flytec 6020 * - Manual (Page 31)

Operating Manual Flytec 6020
To enter arc segments, then the following sequence must be observed:
Long, Lat centre;
Long, Lat start point of arc segment;
Long, Lat endpoint of arc segment;
Rotational direction (+clockwise, - counter-clockwise)
For circles the centre and the Radius are sufficient
Long, Lat of centre;
Radius in km.
2.7 Flight optimisation
2.7.1 Groundspeed (Speed over ground)
The GPS-Receiver calculates its new position once every second. Speed over Ground is
derived from the distance between these positions. From the difference between Airspeed
and Speed over Ground it is possible to reach conclusions about the wind’s influence.
2.7.2 Head- Cross or Tailwind; the Wind component
During a flight to goal or in calculating a final glide, it is not really the absolute value of wind,
but the wind component, i.e. the difference between Ground speed and Air speed, that is
decisive. In most cases the wind does not blow directly from the front or from behind, but
somewhat from the side. If this wind component “Spd-Diff” (in the user defined fields) is
positive, then the pilot will fly with a tail wind and the glide ratio over the ground will improve.
If it is negative, it contains at least a part of head wind and the glide ratio over ground will
decrease. The 6020-GPS takes this wind portion in any case into consideration for
calculation of the final glide. The Windspeed can be displayed as user field.
If the windsock indicating the wind direction covers the wind symbols N E S W, then for
reasons of clarity the corresponding letter positioned below shall disappear!
2.7.3 Wind direction and Wind speed
It is very important to know the wind in direction and
strength, especially in case of an out landing. The Wind
strength can be selected In the user defined fields.
However, for this purpose it is necessary to fly one or two
complete circles as steadily as possible. Whilst circling,
the 6020-GPS determines the direction of least speed
over ground and checks also synchronously if in opposite
direction there might be the fastest speed over ground.
.
Therefrom it is possible to compute the values for wind direction and wind speed.
Wind direction is shown in the compass rose at the position from where the wind is blowing
by a small windsock symbol.
During the landing approach this symbol should always be at the top.
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