2. USER INTERFACE – GENERAL PRESENTATION
SYSTEMS
The interface is composed of the following frames:
Aircraft frame: Displays information regarding aircraft selection made on welcome page (given
for information only).
. 1 and 2 Departure frame (Shortcut <F2>): Allows selecting the departure airport.
. 3 Configuration frame (Shortcut <F3>): Allows defining the aircraft configuration
before loading payload and fuel.
. 4 Loading frame (Shortcut <F4>): Enables to load the aircraft. This frame fulfils all
the tasks of a conventional load sheet.
. 5 Inop Item (Shortcut <F5>) This function is not available at this version.
. 6 Payload distribution (Shortcut <F6>) and Fuel distribution (Shortcut <F7>):
Enables to visualize or define passenger, cargo and fuel distribution
. 7 Results frame: Presentation of results (numerically and graphically).
WEIGHT AND BALANCE ENGINEERING
A. Generalities..............................................................................75
1. Definitions...........................................................................................................................75
1.1. Center of Gravity (CG) .................................................................................................75
1.2. Mean Aerodynamic Chord (MAC) ................................................................................75
2. Forces applied on flying aircraft..........................................................................................76
3. Influence of the CG position on performance......................................................................77
3.1. Impact on the stall speed .............................................................................................77
3.2. Impact on takeoff performance.....................................................................................79
3.3. Impact on in-flight performance....................................................................................84
3.4. Impact on landing performance....................................................................................87
3.5. Summary .....................................................................................................................88
3.6. Conclusion...................................................................................................................88
4. Certified limits design process ............................................................................................89
4.1. Certification requirements ............................................................................................90
4.2. Take-off Limitations......................................................................................................91
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