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Aerodynamics 2 PDR

Team “Canard” September 19th, 2006. Aerodynamics 2 PDR. Overview. Aircraft Geometry: - Airfoil selection for wing and tail - Wing and tail configuration - Aspect ratio and wetted area - 3-View drawing Aerodynamic Mathematical Model: - C L - C D - C M. Wing and Tail Geometry.

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Aerodynamics 2 PDR

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  1. Team “Canard” September 19th, 2006 Aerodynamics 2 PDR

  2. Overview Aircraft Geometry: - Airfoil selection for wing and tail - Wing and tail configuration - Aspect ratio and wetted area - 3-View drawing Aerodynamic Mathematical Model: - CL - CD - CM AAE 451 Team 1

  3. Wing and Tail Geometry Maximum velocity : 115 ft/s Aircraft wetted area : 12.21 ft2 AAE 451 Team 1

  4. 3-View Drawing AAE 451 Team 1

  5. Mathematical Model Lift Coefficient 3D: (From Flight Stability and Automatic Control, Robert C. Nelson) η: Dynamic pressure ratio αw: Angle of attack for the wing αt: Angle of attack for the tail St/S: Horizontal Tail area/Wing area ratio δe: Elevator deflection angle CL: Total Lift Coefficient CLo: CL at α = 0 CL,αw: Lift coeff. slope for wing CL,αt: Lift coeff. slope for tail CL,δe: Lift coeff. slope due to δe AAE 451 Team 1

  6. Wing Lift Coefficient Less than 2π AAE 451 Team 1

  7. CL Plot for Wing Blue Line: XFOIL Red Line: 3D AAE 451 Team 1

  8. Tail Lift Coefficient 0 AAE 451 Team 1

  9. CL Plot for Tail Blue Line: XFOIL Red Line: 3D AAE 451 Team 1

  10. Elevator Effect on CL (From Flight Stability and Automatic Control, Robert C. Nelson) AAE 451 Team 1

  11. Maximum Lift Coefficient CLMax from Lift Curve Needed CLMax Needed ΔCLMax: 0.32 AAE 451 Team 1

  12. Mathematical Model Drag Coefficient Small due to Swet AAE 451 Team 1

  13. Drag Polar Blue Line: XFOIL Red Line: 3D AAE 451 Team 1

  14. Mathematical Model Moment Coefficient 3D: (From Flight Stability and Automatic Control, Robert C. Nelson) Cm,δe : Change of Cm due to δe αw: Angle of attack for the wing δe: Elevator deflection angle Cm : Total Moment Coefficient Cmo : Cm at α = 0 Cm,αw : Change of Cm due to αw AAE 451 Team 1

  15. 0 lt ac ac cg 25% 33% Zero Moment Coefficient AAE 451 Team 1

  16. Moment Coefficient AAE 451 Team 1

  17. Moment Coefficient AAE 451 Team 1

  18. Questions Any Questions? AAE 451 Team 1

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