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Refer to figure or CAP758 figure 2.25.
Given the following information, determine the maximum range speed and the corresponding distance and endurance:

Pressure Altitude: 4 000 ft
Mass: 1 800 lb

  • A
    68 KIAS; 215 SM; 2 hr 42 min
  • B
    70 KIAS; 224 SM; 2 hr 45 min
  • C
    78 KIAS; 207 SM; 2 hr 35 min
  • D
    78 KIAS; 215 SM; 2 hr 42 min
Refer to figure.
1. Firstly, use the upper graph:
  • Enter from the intersection between the Maximum Range line and the Mass of 1 800 lb (between 1 700 lb and 1 900 lb lines).
  • Move down and read the Maximum Range speed: 68 KIAS.
  • Move horizontally to the left and read the Endurance: 2 hr 42 min.
2. Secondly, use the lower graph:
  • Enter from the intersection between the Maximum Range line and the Mass of 1 800 lb (between 1 700 lb and 1 900 lb lines).
  • Move horizontally to the left and read the Maximum Range in SM: 215 SM.
  • Move horizontally to the right and read the Maximum Range in NM: 185 NM.

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