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SAE Brazil AeroDesign Challenge. Florida International University Department of Mechanical and Materials Engineering. Miguel Jimenez Ricardo Lugo Carlos Rojas Advisor: Andres Tremante. Overview. Problem Statement Competition Background Metrics Design Alternatives Wing Design
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SAE Brazil AeroDesign Challenge Florida International University Department of Mechanical and Materials Engineering Miguel Jimenez Ricardo Lugo Carlos Rojas Advisor: Andres Tremante
Overview • Problem Statement • Competition Background • Metrics • Design Alternatives • Wing Design • Proposed Design • Stability and Servos • Timeline
Problem Statement • Designing a remote-controlled aircraft for a competition in São Paulo, Brazil in late 2010. • Aircraft should lift the most possible weight with predefined constraints. • Competition is hosted by SAE Brazil, where universities from all around the globe meet for this event.
Competition Background • Flight Path: • Airplane must take off within 61 meters • Land within 122 meters. * Image courtesy of SAE Brazil
Metrics of Design • SAE Brazil sets the maximum dimensions for the aircraft according to the following formula: D: total dimension L: distance from front to back measured linearly H: maximum height (without propellers) Bi: span of lift-generating components n: number of lift-generating components
Metrics of Design • Maximum weight: 20 kg, including gasoline
Engine Specifications • Engine: O.S .61 FX • Specifications: • Displacement: 0.607 (cu in) • 1.9 horsepower at 16,000 RPM • RPM: 2,000-17,000 • Weight: 19.4 oz. • 0.866” stroke • MSRP: $170.00
Design Alternatives • For an R/C aircraft, the most critical component is the wings. In this sense, the fuselage is not as critical as in full-size airplanes, therefore its design is less rigorous.
Proposed Design • Wing Type: Straight • Wing Position: High Wings (above fuselage) • Other Wing Considerations: Straight Dihedral • To be determined with CFD analysis
Stability and Servos • Four servos will control the airplane’s attitude: Thrust, Yaw, Pitch, and Roll • Empennage • Yaw • Rudders • Pitch • Elevators • Wing • Roll • Ailerons
Division of Responsibilities • Miguel Jimenez • Aerodynamic Design • Computational Fluid Dynamics • Propulsion Calculation • Prototype Construction • Ricardo Lugo • Aerodynamic Design • Control and Stability • Prototype Construction • Carlos Rojas • Radio Control survey • Servos and Channels • Competition parameters • Prototype Construction
Conclusion • Structural Design and CFD analysis is planned for May-June 2010, months before the competition • Wing Design needs dihedral angle CFD testing before modeling • Funding is a key for prototype construction