The payload-range curve in terms of

The payload-range curve in terms of number ofpassengers is shown in Fig. 18. The average weight ofeach passenger and his/her baggage is assumed to be210 Ibs. The payload range curve contains three majorpoints of interest. These points are listed in Table 2and are labeled in Fig. 18. The section of the curvethat is left of point 1 represents a vehicle that begins itsflight with a full payload of passengers and a partiallyfull tank of fuel. To achieve greater ranges more fuel is added to the tanks before take off. The section of thecurve between points 1 and 2 represents a vehicle thatbegins its flight with a partial load of passengers and apartial load of fuel such that the gross take-off weight ismaximum. Here, to achieve greater ranges passengers must be swapped out in favor of adding fuel to theplane. Finally, the section of the curve between points 2 and 3 represents a vehicle with a full tank of fuel and a partial load of passengers. Now, increased range canonly be achieved by taking passengers off the plane todecrease its weight. Figure 18 shows that themaximum range is about 5800 nm and the range withall seats filled is about 4800 nm.