User`s manual

5 GLIDE COMPUTER
glide polar, this enables investigation of whether the glider is being flown optimally with respect to
flap settings and also to investigate the benefits of performance optimisation such as sealing control
surfaces etc.
Data is collected only when in cruise mode and at G loading between 0.9 and 1.1; so pilots per-
forming test flights should attempt to fly smoothly with wings level.
5.12 Flight notifications
Notifications, appearing as status messages, appear when the following conditions are detected:
• Estimated task time too early for AAT
• Estimated arrival at finish past sunset
• Significant wind change
5.13 Sunlight and time
A sun ephemeris computes the time of sunset, which is displayed in the Aircraft Status dialog
(see 12.15). Note that local terrain and atmospheric conditions may result in poor visibility before
the displayed sunset time.
If the expected arrival time at the final waypoint in the task is past sunset, a status message warning
is issued.
57 XCSoar Manual (Altair version) • XCSoar-A-EN