Givens: Gross Weight (W) = 55,000 lb Average Drag (D) = 9,000 lb Average Frictio

ID: 2124278 • Letter: G

Question

Givens:

Gross Weight (W) = 55,000 lb

Average Drag (D) = 9,000 lb

Average Friction (f) = 1,500 lb

Average Thrust (T) = 36,000 lb

Lift Off Speed ( VLO) 180 KTAS

Catapult Distance = 350 ft

1. Compute the average acceleration of the Air Force Fighter during the takeoff roll

(ft/s2).

2. What would be the length of the takeoff roll for the Air Force Fighter (ft)?

3. How long (time) would it take for the Air Force Fighter to liftoff (sec)?

4. Compute the average acceleration of the Navy Fighter during catapult launch

(ft/s2).

5. How long (time in seconds) does it take for the Navy fighter to takeoff with a catapult

launch?

6. Find potential, kinetic, and total energy of this aircraft after takeoff at the following

conditions:

Weight = 50,000 lb

Altitude = 10,000 ft

Airspeed = 300 KTAS

7. Given conditions of #6, find new altitude if the aircraft raises the nose to capture 250

KTAS but keeps the thrust at the same setting and, for simplicity, assume the drag stays

the same. Think of this as a Constant Energy Problem.

8. Find Energy Height (TE/W) of aircraft at 300 KTAS and 10,000 ft.

1. Avg acc. = ((36000-9000-1500)*10)/55000 = 8.27

3. 350/180 = 1.94

5. 180/1.94 = 92.57

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