What's New in AAA 2.5? 1
Design · Analysis · Research
What's New in AAA?
Version 2.5 February 2004
DARcorporation is proud to announce the release of Advanced Aircraft Analysis (AAA), Version 2.5. New features and submodules will become quite evident to AAA users accustomed to Version 2.4 while dozens of improvements and modifications heighten the program's efficiency and precision. AAA 2.5 added over 37,000 lines of code (AAA is now over 220,000 lines of code). More than 250 new output parameters are calculated. Through customer feedback, AAA users have supplied ideas for new features. Some requests involve entirely new analysis modules while others seek the extension of existing ideas. All of these new features are described in Parts II and III of the User's Manual. Section 1 shows the enhancements and modifications made to AAA. Major enhancements include new modules and calculations. The second section contains bug fixes. The AAA Manual describes the installation procedure and all modules. The manual is available in pdf format on the installation CD.
2 What's New in AAA 2.5?
1. Enhancements and Modifications
A module-by-module overview of the differences between AAA 2.4 and AAA 2.5 is listed below.
1. More error checking is performed to see if all weights in tables add up to previously calculated weights.
2. Weight Sizing: plot is added to show the iteration process. 3. Class II Weight: Furnishings weight lower limit is set to zero (was 0.01 lb). 4. Class I Weight: Radii of gyration method is added to calculate the radii of gyration from
given moments of inertia. 5. Weight Sizing: Stall segment is added to the mission profile. 6. UAV, experimental, sport pilot airplanes and gliders are added to the weight regression
coefficients. 7. Class II Weight: V-Tail weight is added. 8. Class II Weight: moments of inertia now includes payload, crew weight, fuel etc and is
flight condition dependent.
1. Effect of body width on lift curve slope is added. 2. Effect of working engine in the fuselage aft end is accounted for in Class II drag. 3. Trendline is by default trimmed drag. Added option to switch defaults. 4. Unselecting previously selected components in Class II Drag are not saved. 5. V-Tail aerodynamics is added. 6. Class II Drag: effect of operating or inoperative engine on nacelle drag is added. 7. Class I Drag: the program checks if the landing gear is retractable or not. 8. Class I Drag: a new module is added showing all drag polars at once: Gear Up, Gear
Down, Flaps Up, Flaps Down, One Engine Inoperative and Current Condition. 9. Class II Drag: wetted areas for lifting surfaces account for dihedral. 10. Flap maximum lift coefficient can be plotted as a function of flap deflection and flap
chord ratio. 11. Class II Drag: miscellaneous drag can now also be expressed as function of angle of
attack. 12. Downwash angle and downwash gradient at the vertical tail are calculated. 13. Propeller slipstream...