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4 Spheres 3

4 Spheres 3. Presents The Development of Gus™. Objectives. Reliability, stability and controllability Most efficient battery usage possible Clarify design ambiguities Scare opposition Have a sufficiently more professional appearance than at the PDR. Gus™. Gus™. Final Design Evolution.

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4 Spheres 3

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  1. 4 Spheres3 Presents The Development of Gus™

  2. Objectives • Reliability, stability and controllability • Most efficient battery usage possible • Clarify design ambiguities • Scare opposition • Have a sufficiently more professional appearance than at the PDR

  3. Gus™

  4. Gus™

  5. Final Design Evolution • Small motor deemed unnecessary • Corner support beams added • Servo gear system replaced with pulley system • Simplified central post structure • Aluminum deemed unnecessary • Truss structure abandoned

  6. Final Design - Gus™

  7. Final Design - Gus™ • Balloon stability • Symmetry • Vehicle Stability • No control surfaces • Simple construction • Modular Top • Bulky, but light

  8. Dimensions and Layout 3D View Top View

  9. Dimensions and Layout

  10. Weight Analysis

  11. Helium Vol. Max. Vol. = 2.094 m3 Req. Lift = 8.75N = (.892 kg)(9.81 m/s2) V = W/[(ρair – ρHe)g] = 0.853 m3 Vehicle Thrust 2 large motors yield 1.76N thrust Vehicle Drag CD estimated at 0.95 D = (½)(ρairv2)(S)(CD) = (½)(1.22)(v2)(1.57)(.95) = 0.9098v2 Vehicle Velocity V = thrust/(½CDS)½ = 2.04 m/s S = 2(pi)(.5)5 =1.57 m2 Flight Duration Ideal = d/v = 87.78/2.04 = 43 sec. Excludes deceleration due to turning and disturbances in airflow. Realistic = 120 sec Max battery life = 10 mins Aero Analysis

  12. Electronics

  13. Control System

  14. Schedule

  15. Conclusion After analysis and testing, we have certified that Gus™ is on the runway of life. We hope that his potential to be a reliable, stable, and efficient lighter-than-air vehicle will lead to success. See you on trial day.

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