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7. (Refer to Figures 32 and 33.) Determine if the airplane weight and balance is within limits.
Front seat occupants: 340 lb.
Rear seat occupants: 295 lb.
Fuel (main wing tanks): 44 gal.
Baggage: 56 lb
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- Weight: 340 lbs
- Arm: 85 in
- Moment: 340 * 85 = 28,900 lb-in
Rear Seat Occupants:
- Weight: 295 lbs
- Arm: 121 in
- Moment: 295 * 121 = 35,695 lb-in
Fuel (Main Wing Tanks — 44 gallons):
- Weight: 44 * 6 = 264 lbs
- Arm: 75 in
- Moment: 264 * 75 = 19,800 lb-in
Baggage:
- Weight: 56 lbs
- Arm: 140 in
- Moment: 56 * 140 = 7,840 lb-in
Total Weight and Moment:
- Total Weight: 2,015 (empty) + 340 + 295 + 264 + 56 = 2,970 lbs
- Total Moment: 151,540 (empty) + 28,900 + 35,695 + 19,800 + 7,840 = 243,775 lb-in
CG = Total Moment/Total Weight = 243,775/2,970 = 82,10 inches
Limits:
- Weight limit: 2,950 lbs
- CG limits for 2,950 lbs: 82.1 — 84.7 inches
Since the weight is 20 pounds over the limit and the CG is within the forward limits