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Final Report (Badger-21012).Pdf BADGER Rotorcraft Center of Excellence Department of Aerospace Engineering Georgia Institute of Technology 225 North Avenue, Atlanta, GA 30332 BADGER In response to the 29TH Annual AHS International Student Design Competition – Undergraduate Category June 2012 2 Eliya Wing - Team Leader Juan Pablo Afman - Chief Engineer Georgia Institute of Technology Georgia Institute of Technology Undergraduate Student, [email protected] Undergraduate Student, [email protected] Christopher Cofelice - Undergraduate Student Robert Lee– Undergraduate Student Georgia Institute of Technology Georgia Institute of Technology [email protected] [email protected] Michael Avera, - Undergraduate Student Travis Smith– Undergraduate Student Georgia Institute of Technology Georgia Institute of Technology [email protected] [email protected] Ian Moore – Undergraduate Student Gökçin Çınar – Undergraduate Student Georgia Institute of Technology Middle East Technical University [email protected] [email protected] Michael Burn – Undergraduate Student Özge Sinem Özçakmak – Undergraduate Student Georgia Institute of Technology Middle East Technical University [email protected] [email protected] Peter Johnson – Undergraduate Student Yakut Cansev Küçükosman – Undergraduate Georgia Institute of Technology Student Middle East Technical University [email protected] [email protected] Dr. Daniel Schrage – Faculty Advisor Dr. Ilkay Yavrucuk - Faculty Advisor Georgia Institute of Technology Middle East Technical University [email protected] [email protected] . GT Students Received Academic Credit: Rotorcraft Senior Design – AE 4359 3 Permission for proposal posting granted. 4 Acknowledgements The BADGER design team would like to thank those who took the time to assist us in the 2012 Design Competition. Professors: Dr. Daniel Schrage -Professor, Department of Aerospace Engineering, Georgia Institute of Technology Dr. Ilkay Yavrucuk – Professor, Department of Aerospace Engineering, Middle East Technical University Dr. Marilyn Smith- Professor, Department of Aerospace Engineering, Georgia Institute of Technology Dr. Lakshmi Sankar- Regents Professor, Department of Aerospace Engineering, Georgia Institute of Technology Dr. Samer Tawfik - Post Doc, Department of Aerospace Engineering, Georgia Institute of Technology Fellow Students: Sylvester Ashok- PhD Candidate, Department of Aerospace Engineering, Georgia Institute of Technology Apinut Sirirojvisuth- PhD Candidate, Department of Aerospace Engineering, Georgia Institute of Technology Robert Scott - PhD Candidate, Department of Aerospace Engineering, Georgia Institute of Technology Ritu Marpu - Graduate Student, Department of Aerospace Engineering, Georgia Institute of Technology Jaikrishnan Vijayakumar- Graduate Student, Department of Aerospace Engineering, Georgia Institute of Technology David Miculescu- Undergraduate Student, Department of Aerospace Engineering, Georgia Institute of Technology Fabian Zender – Graduate Student, Department of Aerospace Engineering, Georgia Institute of Technology Special Acknowledgments The Badger design team would like to thank especially Dr. Schrage and Dr. Yavrucuk for their experience, knowledge, contribution and most importantly patience, to the next generation of Rotorcraft Engineers. 5 Table of Contents LIST OF FIGURES .............................................................................................................................................. 8 LIST OF TABLES ............................................................................................................................................... 10 RFP COMPLIANCE ........................................................................................................................................... 12 1 INTRODUCTION ............................................................................................................................................ 12 2 VEHICLE SELECTION AND CONFIGURATION ........................................................................................ 13 2.1 Mission Requirements ............................................................................................................................. 13 2.2 Examination of Different Configurations .............................................................................................. 15 2.3 Analytical Hierarchy Process and Quality Function Deployment ........................................................ 15 2.4 Configuration Trade-off .......................................................................................................................... 19 General Comparison ................................................................................................................................. 19 Power Efficiency ........................................................................................................................................ 19 Synchropter’s Maneuverability and Agility Capabilities ........................................................................ 20 Forward Flight ........................................................................................................................................... 21 3 PRELIMINARY SYNCHROPTER SIZING .................................................................................................... 21 3.1 Weight Sizing ........................................................................................................................................... 21 3.2 Method ..................................................................................................................................................... 21 3.3 Results ...................................................................................................................................................... 22 4 MAIN ROTOR DESIGN ................................................................................................................................. 22 4.1 Blade Radius ............................................................................................................................................ 22 4.2 Aspect Ratio ............................................................................................................................................. 23 4.3 Tip speed .................................................................................................................................................. 24 4.4 Number of Blades and Chord length ...................................................................................................... 24 4.5 Twist Optimization Procedure ................................................................................................................ 25 Approach .................................................................................................................................................... 25 Results ........................................................................................................................................................ 26 4.6 Airfoil Sections ........................................................................................................................................ 26 5 HUB DESIGN ................................................................................................................................................. 26 6 PROPULSION .................................................................................................................................................28 6.1 Engine Sizing ...........................................................................................................................................28 One Engine vs Two Engines Trade Study ................................................................................................ 29 6.2 Auxiliary Propulsion Study ..................................................................................................................... 29 Auxiliary Yaw Control ............................................................................................................................... 29 Fenestron .................................................................................................................................................. 30 NOTAR ...................................................................................................................................................... 30 Swiveling Pusher Propeller ....................................................................................................................... 31 Intermeshing Main Rotors Only .............................................................................................................. 31 6 6.3 Auxiliary Forward Propulsion ................................................................................................................ 31 Ducted Fan ................................................................................................................................................. 32 Propeller .................................................................................................................................................... 32 6.4 Pusher Propeller Sizing ........................................................................................................................... 32 Tip Speed ..................................................................................................................................................
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