ASCI 309 EXERCISE 4 DRAG AND APPLICATIONS DOWNLOAD
Part 1: Drag Givens (Questions 1 – 6): Weight (W) Wing Area (S) Aspect Ratio (AR) Span Efficiency (e) Temperature Altitude 15,000 lb 230 ft2 5.3 0.85 Standard Sea Level Complete 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 excel spreadsheet to create the answers for the table. Equations for Table: 1. Determine VSTALL (Stall speed in KTAS) 2. Determine DMIN (Minimum total drag in pounds) 3. Determine VDMIN (Speed in KTAS at minimum drag) 4. Determine the parasitic drag at DMIN (pounds) 5. Determine the induced drag at DMIN (pounds) 6. Find Glide Ratio at VDMIN Part 2: Applications of Lift and Drag Givens (Questions 7-11): Weight (W) = 15,000 lb Wing Area (S) = 230 ft2 Altitude = Sea Level Temperature Standard (The Given Figure below is not exactly the same aircraft as above, but close) 7. What is the Angle of Attack at Stall for the aircraft in Figure 1.13? 8. What is the airspeed associated with initial onset of stall? (KEAS) 9. If the gross weight is increased by 10%, how would the stall speed change? 10. What Angle of Attack is associated with Best L/D?
11. What would be the best Glide Ratio for this aircraft?