What is the rule of thumb increase in takeoff distance and

Question

Takeoff and Landing Performance

Given Conditions:

            Weight                                    300,000 lb

            Density Altitude                     5,000 ft

            Temperature                            Standard

            Configuration                          Flaps-5

            V speeds                                 Figure 9.19                 

            No Wind/No Slope

            Thrust                                      103% Full

            Takeoff ground roll distance  4000 ft           

            Balance Field Length  (BFL)  7500 ft

1. Find V₁, V₂, V_R (see Figure 9.19).

2. For a new weight of 350,000 lb and using Table 7.2 Summary of Useful Takeoff Proportions in Modern Jet Transportation Performance, find the following:

            a) Takeoff Ground Roll with weight increased to 350,000 lb.

            b) V_R (assume Rotation Speed is solely a function of stall speed).

3. For a new weight of 300,000 lb, sea level Density Altitude,and using Table 7.2 in the Lewis textbook, find the Takeoff Ground Roll.

4. For a new weight of weight 300,000, increased wind to 20 kts of headwind, and Density Altitude of 5,000 ft, find the Takeoff Ground Roll.

5. How does an increase in Density Altitudeaffect V₁, V₂, V_R, BFL?

6. How does an increase in Weight affect V₁, V₂, V_R, and BFL?

7. How does a slippery runway affect V₁, V₂, V_R, and BFL?

8. If you increase the takeoff weight by 10% (i.e., 300,000 lb to 330,000 lb), what is the rule of thumb increase in takeoff distance and rotation speed in percentage?

9. If an aircraft is able to climb 35 ft after 1000 ft of horizontal travel on takeoff, what is the climb gradient (%) and climb angle (deg)?