4 Spheres 3 Presents The Development of Gus™. Objectives  Reliability, stability and controllability  Most efficient battery usage possible  Clarify.

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Presentation transcript:

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  Small motor deemed unnecessary  Corner support beams added  Servo gear system replaced with pulley system  Simplified central post structure Aluminum deemed unnecessaryAluminum deemed unnecessary Truss structure abandonedTruss structure abandoned

Final Design - Gus™

 Balloon stability  Symmetry Vehicle StabilityVehicle Stability No control surfacesNo control surfaces  Simple construction  Modular Top  Bulky, but light

Dimensions and Layout Top View 3D View

Dimensions and Layout

Weight Analysis Balsa Wood Frame 188g 4 70g 280g Receiver/Antenna/Servo28g 2 Motor & Speed 120g 240g 2 5.5g 11g Mechanical Link 10g Engine Mount “T” 15g Wiring < 10g Battery Pack 110g TOTAL892g

Aero Analysis  Helium Vol. Max. Vol. = m 3Max. Vol. = m 3 Req. Lift = 8.75NReq. Lift = 8.75N = (.892 kg)(9.81 m/s 2 ) = (.892 kg)(9.81 m/s 2 ) V = W/[(ρ air – ρ He )g]V = W/[(ρ air – ρ He )g] = m 3 = m 3  Vehicle Thrust 2 large motors yield 1.76N thrust2 large motors yield 1.76N thrust  Vehicle Drag C D estimated at 0.95C D estimated at 0.95 D = (½)(ρ air v 2 )(S)(C D ) = (½)(1.22)(v 2 )(1.57)(.95) = v 2D = (½)(ρ air v 2 )(S)(C D ) = (½)(1.22)(v 2 )(1.57)(.95) = v 2  Vehicle Velocity V = thrust/(½C D S) ½ = 2.04 m/s S = 2(pi)(.5) 5 =1.57 m 2  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

Electronics

Control System

Schedule Mon. Tue.Wed.Thur.Fri.Sat.Sun Vehicle Construction CDR preparations rehearse CDR: CDR (May)234 Construction Setup Electronics Trial Tune/Repair/improve vehicle RACE DAY! THE END

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.