Weight and Balance

Use the aircraft specifications given below to answer the questions:

            Basic operating weight                          90,000 lb

            Maximum zero fuel weight                 120,000 lb

            Maximum landing weight                    140,000 lb

            Maximum takeoff weight                    170,000 lb

            Fuel tank load                                       25,000 lb

Estimated fuel burn en route                15,000 lb

            Field limited weight                             160,000 lb

            Obstacle limited weight                       150,000 lb

            Total Moment (takeoff)                       92,437,500 lb-in.

            LEMAC                                               600 in.

            TEMAC                                               750 in.

Forward Cargo Station                       200 in.

Aft Cargo Station                                700 in.

1. What is the maximum allowable payload for this flight?

2. Assuming the aircraft is loaded with maximum allowable payload, what is the takeoff CG (inches)?

3. Assuming the aircraft is loaded with maximum allowable payload, what is the takeoff CG (percent MAC)?

4. Suppose we need to shift the CG to 20% MAC. How much weight should be moved from the aft cargo hold to the forward cargo hold?