02 preliminary design 02

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02 preliminary design 02

  1. 1. Preliminary Aircraft Design Suggested Procedure Aero474 Aircraft Design
  2. 2. What aircraft do you want to design? ● Select an aircraft category ● Business jet ● Fighter ● Aerobatics ● Etc … Aero474 Aircraft Design
  3. 3. Collect data about existing competition ● Technical data ● Design reports ● Experimental results ● Previous experience Aero474 Aircraft Design
  4. 4. Define requirements/constraints ● Historical projections ● Expected budget ● Material requirements ● Engine requirements ● Environmental impact ● Market surveys ● Expected sales date Aero474 Aircraft Design
  5. 5. Configuration options ● Engine type and position ● Wing types ● Stabilizer types ● Landing gear types ● Aero474 Aircraft Design
  6. 6. Initial sizing and weight estimation ● Maximum take-off weight ● Fuel weight ● Empty weight ● Engine requirements ● Wing loading ● Suggested geometry Aero474 Aircraft Design
  7. 7. Performance Evaluation ● Aerodynamic performance ● Engine performance ● Stability and flying qualities ● Aero474 Aircraft Design
  8. 8. Initial drawings ● General geometrical drawings Aero474 Aircraft Design
  9. 9. Performance Analysis ● Do you satisfy requirements? ● What is the response to external disturbance? ● Does the preliminary structural design satisfy safety requirements? Aero474 Aircraft Design
  10. 10. Cost Estimation ● Airframe cost ● Engine cost ● Undercarriage cost ● Instrumentation cost ● Operation costs Aero474 Aircraft Design
  11. 11. Sensitivity and optimization ● What if some of the parameters changed slightly? (Plus or minus 25%) ● Does any of these changes produce better results from the performance or cost point of view? Aero474 Aircraft Design
  12. 12. Proposed designs ● Fire fighting aircraft ● Ultra-light aircraft ● Aerobatics aircraft ● Propelled sail-plane ● Light business jet (6 passengers) ● Small airliner (20 passengers) Aero474 Aircraft Design
  13. 13. Homework #3 ● Collect all available information about the family of aircraft you are concerned with ● Create correlation charts for significant parameters (Production date, Take-off weight, engine thrust, wing aspect ratio, range, ceiling, etc …) ● Create a problem definition for your design! ● Due 13/10 Aero474 Aircraft Design

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