Critical Design ReviewTeam MembersObjectivesPreviously Approved DesignFinal DesignFinal Design ConceptControl SystemsVehicle Mass EstimatesAerodynamic AnalysisFinal Design EvolutionGnatt ChartPicture of our LTA (so far)Questions???Critical Design Review Team Floating Point MIT 16.00 April 25, 2003Team MembersCaroline ReillyDavid LaffertyElsa CastilloSynthia TonnTudor MasekObjectivesTo demonstrate the final design for the Lighter Than Air vehicle.And to demonstrate the expected performance of the final design in order to ensure that it is optimal and ready to be built.Previously Approved DesignFinal DesignFinal Design ConceptBeam as main body 2 balloons1motor1rudder2 servos (1 for the rudder and 1 for the motor) Horizontal StabilizerControl SystemsThe rudder is the main control surface for our design. It gives us the ability to turn, and it also acts as a stabilizer.Use of the motor for vector thrust (acts as an elevator).Use of a horizontal stabilizer in order to maintain steady flight.Vehicle Mass EstimatesComponent Mass(in grams)Battery 160Speed controller 8Receiver 27Servo (Elevator) 43Motor 230Propeller 10Servo (Rudder) 43Rudder 48Body 87 Subtotal 656 Payload 500 Total 1056Aerodynamic AnalysisAssuming mass is 1.056 kilograms (full payload) Thrust needs to equal 1.4 N for steady level flightDrag is equal to .43 N with 10% increase for body drag = .473 N Estimated cruising speed = 1.9 m/sFinal Design EvolutionThe changes made to the design were to make the structure lighter and faster: The second motor was removed from the design because the advantage it would provide in speed is not worth the additional weight.We decided that for our purpose a beam of balsa wood was just as effective and more convenient than a truss structure. We also concluded that 2 balloons would provide sufficient lift for our vehicle.Gnatt ChartTASK NAME MARCH APRIL MAY3-Mar 10-Mar 17-Mar 31-Mar 7-Apr 14-Apr 21-Apr 28-Apr 5-May 12-Mayarchitectural designexamine LTA designschoose LTA designsanalyze selected designPDR ****20-Marprototypestestingredesigning/modificationsfinal detailed designCDR ****24-Aprfinal buildTRIALS ****6-MayfixesRACE ****13-MayPicture of our LTA (so