Figure 38: Loading graph and center-of-gravity envelope
FAA-CT-8080-1E · Commercial Pilot supplement · asked on the Commercial Pilot test
1 FAA question that refer to this figure
Question 1 · Commercial Pilot
(Refer to FAA-CT-8080-1E, Figure 38.) Given the following information, does the weight of the aircraft and center of gravity fall within allowable limits? Empty Weight (oil is included) = 1,275 lb Empty Weight moment (in-lb/1,000) = 102.05 Pilot and copilot = 390 lb Rear seat passenger = 145 lb Cargo = 95 lb Fuel = 35 gallons
- A.Yes, the weight and center of gravity is within allowable limits.
- B.No, the weight exceeds the maximum allowable.
- C.No, the weight is acceptable, but the center of gravity is aft of the allowable limits.
Show answer and explanation
Correct: A. Yes, the weight and center of gravity is within allowable limits.
Total weight is 1,275 + 390 + 145 + 95 + 210 (35 gallons x 6 lb) = 2,115 lb, below the 2,200 lb maximum. From the loading graph the moments/1,000 are about 35.4 (pilots), 18.1 (rear passenger), 11.0 (cargo) and 18.9 (fuel); added to 102.05 that is about 185.5. On the normal-category envelope, 2,115 lb allows roughly 182 to 190, so the loading is within both weight and center of gravity limits.
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