User manual

Discus Glider X
Aerosoft GmbH 2009
46
GPS
There is a PDA based GPS device
included. This is not an actual one but
it looks and behaves very much like
the software used by many glider
pilots. If it is not on you can activate it
with the GPS switch on the panel.
You can open it as a bigger function
with [shift][2] and can undock that
window when needed.
When you have a standard FSX flight
plan loaded it will be shown on the display. At the same time closed
airspace is also shown so you can prevent straying into the control
zone of a major airport in your attempt to find that perfect thermal.
We strongly recommend having a flight plan loaded whenever possible.
Speed to fly switch
The C4 flight computer can either indicate your (total energy compen-
sated) vertical speed or the optimal speed to fly. This is selected with
the Speed to Fly switch. Both modes have the option to get audio
feedback, in the Speed to Fly mode a lower beep means you need
more speed and a higher broken beep means you should slow down
for optional performance. In the Vertical speed mode higher broken
beeps mean you are gaining energy and low beeps mean you are
losing energy.
Yaw string
It’s rare that the most important instrument in an aircraft does not cost
more than a simple piece of tuft or yarn. But many glider pilots will tell
you that the yaw string (also called slip string) is the most important
gauge they have and it is in fact considered part of the primary flight
reference instruments. It is taped to the canopy and it simply moves in
the airstream. If it is centered you are flying the glider as efficiently as
possible (without any slip and a yaw angle as small as possible).