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Lecture 10: Configurations
Jason Mickey
For AE 440 A/C Lecture
September 2009
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Configuration Responsibilities
• Design and determine the location, relationship and weights of primary component parts
• Calculate the center-of-gravity range and moments of inertia (to Stability)
• Integrate and control all external dimensions, including cross-sectional and plan-form aspects (wing data from Aerodynamics; non-wing data to Aerodynamics)
• Integrate all configurations with CAD renderings• Get structural component dimensions and design
and optimize remaining internal component placement
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Design ConsiderationsF-16 design included multiple
weapons and multiple mission roleswith high performance
Key parameters included:-wing loading-thrust loading
-control issues (at M~1 & M>1)-empty-weight fraction
-pilot g tolerances
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3-View• Important quantitative aspect• Located near the front• Introduce overall features of the design
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X-32 3-D Solid Model
Digital modeling reduces design rework, minimizes scrap, and
significantly lowers assembly defects
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Center-of-gravity Travel
Configure fuel system and payload placement
to minimize travel
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(AE 441) Auxiliary and Avionics
• Air Conditioners• Bleed-air• Avionics locations• Cross-flow for engine restart
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AE 440 Selection Reasoning
• “The best LSA configuration for internal configuration reasons would be the LWT because having the fuel in the wings creates a more stable platform as it lowers the y-axis center of gravity which is discussed further in Section 6.4…”
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CDR Suggestions• Re-estimate aircraft weight/size every week• Design deployment aspects & work with cost• Incorporate data for external configuration• Place components for internal configuration• Communicate design problems and conflicts• Get details on sub-systems size, weight, cost• Trade studies: e.g. size vs. payload weight