Lighter Than Air Critical Design ReviewPresentation ObjectivesFinal DesignScale DrawingsSlide 5Slide 6Control SystemsCircuit DiagramMaterialsAerodynamic AnalysisFinal Design Evolution and AnalysisAnalysis Cont’dGood Luck to all the Teams!!!Lighter Than AirLighter Than AirCritical Design Critical Design ReviewReviewMark CoteMark CoteYonas TesfayeYonas TesfayeJosh LevingerJosh LevingerBryan OwensBryan OwensThe A-TeamPresentation Presentation ObjectivesObjectivesIntroduce Final DesignIntroduce Final DesignScale drawings of final designScale drawings of final designControl systems of final designControl systems of final designAerodynamic analysis of final designAerodynamic analysis of final designFinal design evolution and analysisFinal design evolution and analysisFinal DesignFinal DesignLinearLinear–Pros:Pros:Reliable and well testedReliable and well testedLow drag profileLow drag profileStabilityStabilitySimplicitySimplicityExpandableExpandable–ConsConsDifficult to maneuverDifficult to maneuverLarge structure Large structure requirementrequirementUnwieldy (N-body Unwieldy (N-body problem)problem)Scale DrawingsScale DrawingsFront ViewCourtesy: Mark CoteScale DrawingsScale DrawingsSide ViewCourtesy: Mark CoteScale DrawingsScale DrawingsBottom ViewCourtesy: Mark CoteControl SystemsControl SystemsWe will be using two servos to steer. The motors are in line and the We will be using two servos to steer. The motors are in line and the front motor will be used to steer left and right. The rear motor will be front motor will be used to steer left and right. The rear motor will be used to control pitch. We will also have rear stabilizers. used to control pitch. We will also have rear stabilizers.Circuit DiagramCircuit DiagramCourtesy: Josh LevingerMaterialsMaterialsObjectObjectQuantityQuantity Mass (g)Mass (g)Large MotorLarge Motor 2 2420.0420.0PropellersPropellers 2 215.915.9ReceiversReceivers 1 127.027.0ServosServos 1 143.043.0Battery packBattery pack 1 1148.0148.0BalloonsBalloons 3 3210.0210.0StructureStructure 1 1 175.0 175.0Total Weight : ~ 1040 gTotal Weight : ~ 1040 gTotal Payload: ~ 710 gTotal Payload: ~ 710 gAerodynamic Aerodynamic AnalysisAnalysism axmax)( VgLHeairDSCDV2gWVHeAir)(=1.773 m31 balloon = .524 m33 balloons overfilled should support the weight.We believe that we will average 2/3 of the maximum thrust throughout the course for a velocity of 2.09 m/s.eqeqThrustDrag Lift generated by three normal balloons: 15.205 NOverfilling Balloons: 17.150 NVDT We believe our blimp will be able to complete the course in 42 seconds.Final Design Evolution and Final Design Evolution and AnalysisAnalysisOriginally, we had decided on a triangle Originally, we had decided on a triangle design with differential steering. Our first design with differential steering. Our first concern was in regards to drag because it concern was in regards to drag because it had profile drag of about two balloons as had profile drag of about two balloons as which meant we would be fighting twice as which meant we would be fighting twice as much drag. much drag. Front ViewTop ViewCourtesy: Mark CoteAnalysis Cont’d Analysis Cont’d We also realized that with differential We also realized that with differential steering, we would lose a significant steering, we would lose a significant amount of thrust.amount of thrust.Good Luck to all the Good Luck to all the