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Drag Queen

Drag Queen. 16.00 LTA Completed Design Review. Nestor Lara, 2004. Drag Queen. Nestor Lara Chicago, Illinois Alice Fan Orlando, Florida Benjamin Feinberg Lawrenceville, New Jersey Matt Williams Battle Creek, Michigan Hyon Lee Windsor, Canada. Nikhil (friend of group), 2004. I II

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Drag Queen

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  1. Drag Queen 16.00 LTA Completed Design Review Nestor Lara, 2004

  2. Drag Queen Nestor Lara Chicago, Illinois Alice Fan Orlando, Florida Benjamin Feinberg Lawrenceville, New Jersey Matt Williams Battle Creek, Michigan Hyon Lee Windsor, Canada Nikhil (friend of group), 2004

  3. I II III IV V VI VII VII Table of Contents Introduction Objectives Selection of Final Design Schematics of Final Design Control Systems Aerodynamic Analysis Weekly Timeline Conclusion

  4. Objectives To discuss the procedure and final selection of Drag Queen structure To provide analysis regarding the components and method of functioning of the final design To accurately analyze the aerodynamics of the final design To present a final design that will work based upon correct calculations Ben Feinberg, 2004

  5. PDR DesignCDR Design 3 balloons assembled in row 3 balloons assembled on triangular frame 3 motors: 2 large, 1 small 3 motors: 2 large, 1 small Long, thin Compact, tight Advantages: Advantages: • Somewhat stable Stronger structure • Lift can be adjusted Less wobbly in turns • Simpler Structure Less chance for ‘rollover’ • Aerodynamic Symmetrical sides are possibility • Less risk in turns, greater mobility • Disadvantages: • Disadvantages: • Unstable in turns • “Rollover” capabilities Larger Drag (but low speeds) • Unoriginal Final Design – Intro

  6. Symmetry • Triangular symmetry desired, but too complicated • Established ‘front’ and ‘back’ to triangular LTA Structure • 2 triangles (.9m sides) were assembled atop one another • Between triangles is balsa wood to create durable and strong structure Electronics • Triangular structure allows all electric motors to be relatively close to one another • 1 small motor (altitude) in front , 2 large motors (thrust, steering) in each back corner • Wires originate and join battery pack on platform in middle of LTA Power • Altitude: Power comes from small motor in front • Thrust: both large motors powered at same speed • Steering: with one motor / propeller fixed and one free to rotate, greater torque can be created in desired direction when turning Final Design Features

  7. Final Design – Scale Drawing Hyon Lee, 2004

  8. Controls 1 and 2 The speed of each motor’s propeller is independent of one another Thus, differential steering is possible Control 3 Motor 2 is on a swivel: when pointed straight ahead its range is 90 degrees to the left or 90 degrees to the right To add to the idea of differential steering, this will provide greater torque in direction of steering Control 4 Self-explanatory Used to provide lift and keep LTA stable in case of uneven air conditions Control Systems 4 Controls 1. Speed of Motor 1 (rear left) 2. Speed of Motor 2 (rear right) 3. Rotation of Motor 2 4. Altitude

  9. Control Systems DRAG QUEEN Features Our LTA is capable of differential steering and thrusting and also makes use of a rotating motor. With only 4 controls on the transmitter, we are effectively and efficiently using all controls to create a working LTA.

  10. Control Systems – Schematic Hyon Lee, 2004

  11. Aerodynamic Analysis Note: Some values taken from Interactive Aerospace Engineering and Design: D. Newman

  12. Helium Volume Required: Aerodynamic Analysis Lift From Volume Thrust: Thrust based on 9V battery

  13. Vehicle Velocity: Aerodynamic Analysis Vehicle Drag: With Non-Perfect Flight, we estimated the endurance of 1 round trip would be: Endurance:(Based on battery life and change of volume of balloons during flight)

  14. Drag Queen Timeline Alice Fan, 2004

  15. Conclusion By analyzing various designs and assessing the strength and weaknesses of each, we were able to select a design that provides optimal reliability and efficiency.  The incorporation of two large motors allows for better maneuverability and maximum thrust, while the small motor underneath the vehicle allows for stability and lift control.  The lightweight design contributes to the improved aerodynamics of the vehicle and provides greater support to the frame of the dirigible.  Thus, these features of our team's LTA make it highly competitive and give us the leading edge.

  16. Good Luck Drag Queen

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