Transcription of Airbus A380 Analysis - Virginia Tech
1 Airbus a380 AnalysisRobert RoedtsRyan SomeroChris WaskiewiczA380 Specifications Overall Max TOGW = 1,235,000 lbs Wingspan = ft Length = ft Height = ft Planform Wing Area = 9,100 ft2 AR = Wing Sweep = Taper Ratio = t/c = Point Neutral Point: ft from the nose About 51% of the length of the fuselage Found using VLMpc Could not find a given center of gravitylocation or a static margin for the a380 Estimated center of gravity: 110-120 the noseMinimum Drag due to Lift The value for the minimum CDi fromLAMDES was given as The value did not change as the cglocation was varied For every aft shift in cg, the values thatLAMDES gave were the same Minimum CDi for a380 = Total minimum CD = Theory Twist Distribution (b/2)Twist ( Degrees)The Linear Theory Twist Distribution showed that the twist atthe root was greatest near the root and decreasing out to the tail did not show much variation in the twist Cl Distribution showed high lift on the main wing andlow lift on the tail as to be expected as well as an ellipticdistribution.
2 The Span e was found to be Thiswas expected as the a380 has a small dihedral to its wings,giving a Span e value greater than (feet)Cl *C/Cave"Wing"TailThe Camber of the root was shown to be almost linear,while the camber at the tip has area of large camberjust aft of the leading edge and decreasing to thetrailing and Tip Friction Drag Inputted a380 geometry into FRICTION At cruise (Mach @ 35,000 ft) CDO 20 counts higher than 747 L/DMAX is with this CDO value About 10% less than other Airbus aircraftAirfoil Analysis Approximated the root airfoil to be a NASASC(2)-0610 and the tip airfoil to be aNASA SC(2)-0606. Based on similar geometries and AirfoilSC(2)-0610 CLmax determined from XFOIL to beapproximately at an angle of attack of 18 . Pressure Distribution from TSFOIL at cruise CL: Quite difficult to design an airfoil factoring intransonic SurfaceLower SurfaceBox Effects Two major effects on the design of theA380 with the box effects.
3 Maximum TOGW Span Loading a380 does not meet normal trends andwas a major area of concentration duringthe design Mason, , ~mason/Mason_
