College of Engineering and Computer Science Department of Mechanical and Materials Engineering Wright State University Regular Class Aircraft SAE Aero Design East Competition “Raiders” Team Number 020 Andrew Fleming Gregory Palm Rebekah Puterbaugh Team Advisor: Dr. Scott Thomas Team Pilot: Eddie Noble April 16, 2004

College of Engineering and Computer Science Department of Mechanical and Materials Engineering n Design with high-lift criteria in mind n Meet all design competition requirements n Built so pilot can easily control the plane n Minimize weight wherever possible n Have working plane with multiple test flights prior to the competition Project Goals

College of Engineering and Computer Science Department of Mechanical and Materials Engineering Airfoil Selection n High-lift airfoil required n Three designs singled out –Selig 1223 –Selig 1210 –NACA 6412 n XFOIL used to determine airfoil performance –Angle of attack = 0 degrees –Re = –Mach =.0221 –Flap deflection = 0 degrees n Selected Airfoil –Selig 1223 clcl cmcm cdcd S S NACA

College of Engineering and Computer Science Department of Mechanical and Materials Engineering Engine Test Stand n Designed by Wright State Aero Design Team 2003 n Initially for engine “break-in” n Primarily for static thrust measurements using various propellers PropellerRPMThrust Produced (lbs.) 10 x 8 Zinger x 7 Masterscrew x 5 Zinger x 6 APC x 6 Zinger x 6 APC

College of Engineering and Computer Science Department of Mechanical and Materials Engineering n Simultaneous equations with time as driving variable n Chord length and density referenced for instant updates n From initial time to liftoff n From goal weight and required takeoff distance, determined chord length Calculations Lift Wing Drag Fuselage Drag Rolling Drag Effective Weight Total Drag Net Thrust/Acceleration Total Distance Instantaneous Velocity

College of Engineering and Computer Science Department of Mechanical and Materials Engineering Construction Methods n Fuselage –Foam laminated with balsa on one side n Nose –Balsa build-up n Wings –Balsa build-up n Tail –Foam laminated with balsa sheeting on both sides

College of Engineering and Computer Science Department of Mechanical and Materials Engineering n Plane taxied in the parking lot of Russ Engineering Center n Lift-off with a small payload n Design Improvements –Lightening process n Lightening holes located in tail and rear fuselage n Lighter rear landing gear n Net weight loss:.91 lbs. –New nose gear –Cross members located closer to wing Taxi Test: March 27, 2004

College of Engineering and Computer Science Department of Mechanical and Materials Engineering n Several parameters adjusted –Propeller –Payload –Flap Deflection n Top Result –13 x 6 APC Propeller –40% Flap deflection –Approximately 180 feet for takeoff n Design Improvements –Taller gear set –Adjustment of payload base –Small rear drag wheel –Fixed elevator servo Takeoff Test 1: April 7, 2004

College of Engineering and Computer Science Department of Mechanical and Materials Engineering n Failures –Nose gear –Rear landing gear n Design Improvements –Improved soldering on nose gear extension –Reinforced rear landing gear mount Takeoff Test 2: April 10, 2004

College of Engineering and Computer Science Department of Mechanical and Materials Engineering n Estimated total plane costs: $1, n Major Cost Breakdown Budget

College of Engineering and Computer Science Department of Mechanical and Materials Engineering Project Timeline

College of Engineering and Computer Science Department of Mechanical and Materials Engineering n R/C Aircraft Building Skills –Phases of the project take longer than anticipated –Optimizing aircraft for top performance –Basic R/C model building skills –Engine testing and fine tuning n Team Building Skills –Project phase planning –Optimizing work time for each team member –Solving design conflicts Lessons Learned

College of Engineering and Computer Science Department of Mechanical and Materials Engineering Flight Test Video

College of Engineering and Computer Science Department of Mechanical and Materials Engineering Questions?

College of Engineering and Computer Science Department of Mechanical and Materials Engineering Questions?

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