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Page 1 of 3This document was developed for online learning in ASCI 309.File name: Ex_4_DragUpdated: 8/13/2014Exercise 4: Drag and ApplicationsPart 1: DragGivens (Questions 1 – 6):Weight (W) 15,000 lb CDP 0.021Wing Area (S) 230 ft2 CLmax at Stall 1.5Aspect Ratio (AR) 5.3 Note: Assume the drag polar is a parabolaSpan Efficiency (e) 0.85Temperature StandardAltitude Sea LevelComplete the following table for this particular typical transport jet. Start the table at stall speed, VS. Then answer the questions at the end using the values from the table. You can use an excelspreadsheet to create the answers for the table.V(KTAS) q(psf) CLCDCL / CDDP(lb) DI(lb) DT(lb)VS120140160180190200220240260Page 2 of 3This document was developed for online learning in ASCI 309.File name: Ex_4_DragUpdated: 8/13/2014Equations for Table:q =? ??2295∕ CL =qSW CDi =[1/ (πeAR)] CL 2CD = CDP + CDi CD = CDP + [1/ (e AR)] CL 2 Dp = CDp q SDi = CDi q S = [1/ (e AR)] CL2 q S Dt = Di + Dp = CD q S1. Determine VSTALL (Stall speed in KTAS)2. Determine DMIN (Minimum total drag in pounds)3. Determine VDMIN (Speed in KTAS at minimum dra

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Page1of3This document was developed for online learning in ASCI 309.File name: Ex_4_DragUpdated: 8/13/2014Exercise 4: Drag and ApplicationsPart 1: DragGivens (Questions 1 – 6):Weight (W) 15,000 lb CDP0.021Wing Area (S) 230 ft2CLmaxat Stall 1.5Aspect Ratio (AR) 5.3Note: Assume the drag polar is a parabolaSpan Efficiency (e) 0.85Temperature StandardAltitude Sea LevelComplete the following table for this particular typical transport jet. Start the table at stall speed,VS. Then answer the questions at the end using the values from the table. You can use an excelspreadsheet to create the answers for the table.V(KTAS) q(psf) CLCDCL/ CDDP(lb) DI(lb) DT(lb)VS120140160180190200220240260Page2of3This document was developed for online learning in ASCI 309.File name: Ex_4_DragUpdated: 8/13/2014Equations for Table:q =? ??2295∕ CL=qSWCDi=[1/ (πeAR)] CL 2CD= CDP+ CDiCD= CDP+ [1/ (e AR)] CL 2Dp = CDpq SDi = CDiq S = [1/ (e AR)] CL2q S Dt = Di + Dp = CDq S1. Determine VSTALL(Stall speed in KTAS)2. Determine DMIN(Minimum total drag in pounds)3. Determine VDMIN(Speed in KTAS at minimum dra

 
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