Altair Glide Computer and Navigation System User Manual Page 78
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XCSoar User Manual
5.8 Final glide calculator
The final glide calculator uses many sources of information when
determining the altitude required to reach your goal or the next
waypoint. These are:
• The glider’s polar data;
• The wind speed and direction;
• The distance and bearing of the goal or waypoint;
• The MacCready setting;
• The altitude of the waypoint or goal;
• A user specified safety margin (arrival height).
• The glider’s total energy if XCSoar is connected to an in-
strument with an air speed indicator.
From the parameters shown above, two altitudes are derived.
Altitude required : This calculation is the total altitude required for the glider to
reach the goal plus any user safety margin.
Altitude difference : This calculation is the altitude required to glide to the goal
plus any safety arrival altitude plus the altitude of the goal,
minus the altitude above mean sea level of the glider. The re-
sult represents either your height above glide slope, or your
arrival height at goal. If no goal altitude is provided in the
turn-point file, XCSoar will use the terrain file altitude at the
goal.
The final glide calculation is extended to calculate the altitudes re-
quired and difference to complete the entire task. This capability
is sometimes referred to as final glide around multiple turn points.
The altitude difference to complete the task is displayed continu-
ously as an arrow and in numeric form on the left hand side of the
map area of the screen.
5.9 Display of altitude required
On the left side of the map display, a box displays the calculated
height difference required for the glider to complete the task, or
reach the final waypoint. If the glider is above the minimum height
required, a green arrow bar is drawn above the box indicating the
amount of excess height. If the glider is below the minimum height
required, a red arrow bar is drawn below the box indicating the
amount of height deficit.
78
- User Manual 1
- Contents 2
- Revision history 7
- Warnings and precautions 7
- Legal notices 7
- 1 Introduction 9
- 1.2 Notes 10
- 1.3 System requirements 10
- 1.4 Downloading XCSoar 11
- 1.5 Installation 12
- 1.6 Running XCSoar 15
- 1.7 Through-life support 17
- 1.8 Training 18
- 1.9 Using XCSoar safely 19
- 2 User Interface 20
- 2.1 Button labels and menus 22
- 2.2 InfoBoxes 28
- 2.3 Status messages 30
- 2.4 Dialog windows 30
- 2.5 Sounds 33
- 2.6 Screen 34
- 2.7 Help system 34
- 3 Navigation 35
- 3.3 Zoom and map scale 36
- 3.4 Panning the map 37
- 3.5 Waypoints 38
- 3.6 Active task 39
- 3.7 Terrain and Topology 39
- 3.8 Trail 40
- 3.9 Markers 42
- 3.10 Glide range 42
- 3.11 Aircraft status dialog 43
- 4 Cross Country Tasks 45
- 4.2 Waypoint details dialog 46
- 4.3 Waypoint selector dialog 48
- 4.4 Task editor dialog 50
- 4.6 Task rules 55
- 4.7 Alternate starts 57
- 4.8 Task calculator dialog 59
- 4.9 Task status dialog 60
- 4.10 Assigned Area Tasks 60
- 4.11 OnLine Contest 62
- 4.12 Abort/resume task 63
- 4.13 Logger 65
- 4.14 Logger replay dialog 66
- 4.15 Analysis dialog 67
- 4.16 Sunlight and time 69
- 5 Glide Computer 71
- 5.2 MacCready setting 72
- 5.3 Glide polar 73
- 5.4 Basic settings dialog 73
- 5.5 Speed command display 75
- 5.6 Speed to fly 75
- 5.7 Safety heights 76
- 5.8 Final glide calculator 78
- 5.10 Task speed estimation 80
- 5.11 Optimal cruise track 81
- 5.12 Auto MacCready 82
- 5.13 Analysis dialog 84
- 6 Atmosphere and Instruments 86
- 6.2 Air data inputs 87
- 6.3 Wind display 87
- 6.4 Wind estimation 88
- 6.5 Wind settings dialog 89
- 6.6 Thermal profile 90
- 6.7 Thermal locator 91
- 6.8 Convection forecast 92
- 6.9 Analysis dialog 93
- 7.1 Airspace display 95
- 7.2 Incursion events 96
- 7.3 Airspace warning levels 97
- 7.4 Airspace warning dialog 98
- 7.6 Airspace queries 100
- 7.7 Airspace filter dialog 101
- 7.8 Analysis dialog 101
- 7.9 FLARM traffic display 102
- XCSoar User Manual 103
- 7.10 Team flying 104
- 8 Avionics and Airframe 106
- 8.3 Switch inputs 107
- 8.4 Switch dialog 108
- 8.6 Mobile telephones 109
- 8.7 Other devices 110
- 8.8 System status dialog 110
- 9 Quickstart 111
- 9.2 FAI Task 112
- 9.3 FAI Task, Manual Start 114
- 9.4 AAT Task, Manual Arm 114
- 10 InfoBox Reference 119
- 10.3 Glide ratio 120
- 10.4 Variometer 121
- 10.5 Atmosphere 122
- 10.6 MacCready 122
- 10.7 Navigation 123
- 10.8 Waypoint 124
- 10.9 Team code 124
- 11 Configuration 126
- 11.3 Airspace Display 128
- 11.5 Map Display 131
- 11.6 Glide computer 133
- 11.7 Safety factors 134
- 11.8 Polar 136
- 11.9 Devices 137
- 11.10 Units 138
- 11.11 Interface files 139
- 11.12 Appearance 141
- 11.13 Vario gauge 143
- 11.14 Task 144
- 11.15 Task Rules 146
- 11.16 InfoBox 147
- 11.17 Logger 148
- 11.18 Waypoint edit 149
- 12 Data Files 151
- 12.2 Terrain 152
- 12.3 Topology 152
- 12.4 Waypoints 152
- 12.5 Airspace 153
- 12.6 Airfield details 153
- 12.7 Glide polar 154
- 12.8 Profiles 155
- 12.9 Checklist 156
- 12.10 Tasks 156
- 12.11 Flight logs 157
- 12.12 Input events 157
- 12.13 Language 158
- 12.14 Status 158
- 12.15 FLARM Identification file 159
- 12.16 Dialog files 159
- 13 History and Development 160
- 13.3 Open source philosophy 161
- 13.4 Development process 162
- 13.5 User base 162
- 13.6 Credits 163
- No warranty 169
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