Flytec 5030 v2.24 * - Manual (Page 14)

Flytec
5030 GPS
1.8.5 Distance to Waypoint
The horizontal distance is displayed for the viewer to the chosen waypoint as long as the
destination has been input automatically or manually with the Goto function. For distances
under 10km the resolution is 10m, if farther it is 0.1km. (Please read – 2.7 Goto-Function)
The distance to a WP is always measured to the centre of a WP cylinder an not tits circum-
ference.
1.8.6 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
Attainable glide ratios in calm air for the following glider types:
Normal Paraglider High Performance
Paraglider
Normal
Hang Glider High
Performance
Hang Glider Rigid Wing
Hang Glider
5-7 7+ 8-10 11-14 15+
Following different types of Glide ratio can be selected within the user-selectable fields.
Glide ratio through the air:
L/D air =TAS / Sink True airspeed divided by sink
Glide ratio over the ground:
L/D gnd = GS/Sink
Ground speed divided by sink
Required glide ratio in order to reach the chosen destination from the present position.
L/D req. = Distance to the waypoint divided by the height difference to the waypoint.
Example to L/D values
Best glide 8
Act. Distance to WP 5.45 km
Best glide –point
to leave
931m over goal
Act. Alti
956m
Alt a BG
275m
681m
2km
L/D req 5.7
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