LX5000 March 2002
page 13
Further settings possible for HDG:
•
R.FROM 1.TP
: This sort of start sector was planned for the world gliding championships 1999 in Bayreuth. A
radius is drawn around the first turnpoint through the start point and a radial segment of a certain length is cut out
symmetrically around the start point. The advantage of this system is that a pilot starting far outside at the end of
that line has to fly the same distance to the first turnpoint as a pilot starting in the "middle". This is contrary to the
classical start line where the distance to the first turnpoint is increasing the more one starts further from the center
of that line.
A21:
is fixed here to AUTO
A1:
is without function, only R1, which defines here the length of the segment, is of interest
R1:
describes the half-length of this segment
A2:
has no function here
R2:
two radials from the first turnpoint to the ends of the segment are constructed and elongated with R2. A
second segment is drawn through these two new points. Together this defines a start sector by using two
segments
•
FIXED VALUE:
The direction of the symmetry axis of the sector is adjusted to a fixed bearing. This bearing is
entered as A21. The setting FIXED VALUE is normally not used for start sectors, but sometimes for finish zones
(see “FINISH ZONE”).
Note:
Please be aware that all the examples are intended to explain the programming procedures and therefore cannot claim
absolute accuracy and completeness. For each kind of competition different types of sectors and rules for the correct
documentation of these sectors may apply, which can be found in the particular competition rules. In case of doubt, the
rules pertaining are defined in the FAI Sporting Code Section 3. E.g. For most of the national decentralised
championships the start sector consists of the 90
0
-photosector, for FAI-badges, 1000/2000km-diplomas and Barron-
Hilton-Cup only the 90
0
-photosector is allowed. For record flights a 1000m startline is used for recording the start time.
3.1.2.2.2
POINT ZONE
Now select the item POINT ZONE of OBS. ZONE. You will get the same options as for the START ZONE. The only
difference is that you get more options for the settings of HDG. The current competition rules require a 500m-cylinder,
so that the direction of the symmetry axis is not important. Nevertheless, all the possible settings are explained here,
because in decentralised competitions or for record flights other sectors are valid:
•
SYMMETRICAL
: The symmetry axis of the turnpoint sector is orientated symmetrically about the line bisecting
the inbound leg from the previous turnpoint and the outbound leg to the next turnpoint.
•
TO PREV POINT
: The symmetry axis is directed to the previous turnpoint. This option was intended for Cats
Cradle and related tasks.
•
TO NEXT POINT
: The symmetry axis is directed to the next turnpoint. This option was intended for Cats Cradle,
too.
•
TO START POINT
: The symmetry axis is directed to the start point. Again a Cats Cradle option.
•
FIXED VALUE
: The symmetry axis can be adjusted to any direction. This is the only option for which A21 is not
set to AUTO.
Example 3:
We want to adjust the currently valid sector for the German decentralised competition (DMSt) until 2001 (from 2002
with the DMSt online only the 90
0
fotosector is valid). This is the 90
°
-photo sector combined with the 500m-cylinder:
