DG Flugzeugbau DG 202, Flight Manual

Page: 108 / 212

4
1.7 Airport and turning point database
The DX 50 is able to store up to 5000 airports, 600 turning points and 100 tasks with 10 turning points each. In the
original version already several thousands airports (e.g. in Europe) are stored. These easily can be selected by the
user and can be modified or deleted. This can be done either directly at the LX 5000 or leisurely at home if a PC is
available. The delivery scope of the DX 50 contains a corresponding disc with the transfer an editing software.
Please beware that the manufacurer can not guaranty for the accuracy of the airport and TP data after the
date of their publishing.
1.8 Coordinates
The DX 50 enables you to enter the coordinates in degrees, minutes and seconds or decimal minutes. The favoured
format can be selcted in SETUP program.
Latitude (LAT): N/S GG.MM.mm or GG.MM.SS (N= North, S= South)
Longitude (LON): W/E GGG.MM.mm or GGG.MM.SS (W= West, E=East)
GG= degree
MM= minutes
mm= decimal minutes
SS = seconds
With the following formula seconds can be converted into decimal minutes:
seconds
decimal minutes= ------------
0,6
Before entering coordinates from already existing list please take note in which format these coordinates are given.
The right coordinate format should be selected in SETUP program before the entry. If necessary the coordinates can
be converted with the above mentioned formula.
1.9 Glider polars
Nowadays in the DX 50 some 30 glider polars are stored which can be selected in SETUP menu. For the gliders
which polar is not included in this list it is possible to define your own two polars which can be added to the e-
xisting list.
These polars are defined by 3 coefficients (a, b and c). These coefficients can be calculated by the program
POLAR.EXE which is inclouded on the software support disc. Three pairs of values need to be selcted out of the
speed polar diagram of the glider and entered in the programe mentioned above. The coefficintes a, b and c can then
be entered in the DX 50. According to our experience the values by these airspeeds should be used: 100, 130 and
160 km/h.