Piper PA-44-180 Seminole weight and balance calculator
Enter the empty weight and CG from your aircraft's weight-and-balance record, then the people, baggage and fuel. The calculator works out the moment for each station, the takeoff, landing and zero-fuel CG, and plots them on the Piper PA-44-180 Seminole CG envelope.
Sample data: these PA-44-180 numbers are representative values that have not yet been checked line by line against the POH. Use your POH for real loading decisions.
| Station | Weight | Arm (in) | Moment |
|---|---|---|---|
| Basic empty weight | 207,765 | ||
| Nose baggagemax 100 lb | 25.0 | 0 | |
| Pilot and front passenger | 80.5 | 27,370 | |
| Rear passengers | 118.1 | 0 | |
| Aft baggagemax 200 lb | 142.8 | 2,856 | |
| Fuel (usable) | = 240 lb (6 lb/gal) | 95.0 | 22,800 |
| Takeoff | 3,030 lb | 86.07 | 260,791 |
| Landingburn | 2,958 lb | 85.85 | 253,951 |
| Zero fuel | 2,790 lb | 85.30 | 237,991 |
CG = total moment ÷ total weight = 260,791 ÷ 3,030 = 86.07 in.
Piper PA-44-180 Seminole loading stations
Representative values: front seats at 80.5 in, rear seats 118.1, aft baggage at 142.8 (200 lb), nose baggage at 25 (100 lb), fuel at 95 (108 gal usable), maximum weight 3,800 lb. The forward limit and nose-baggage arm have not yet been cross-checked against the POH.
| Station | Arm (in aft of datum) | Limit |
|---|---|---|
| Basic empty weight | from your W&B record | — |
| Nose baggage | 25.0 | 100 lb |
| Pilot and front passenger | 80.5 | — |
| Rear passengers | 118.1 | — |
| Aft baggage | 142.8 | 200 lb |
| Fuel (usable) | 95.0 | 108 gal usable |
Piper PA-44-180 Seminole CG envelope
Normal category — maximum 3,800 lb
- Forward limit: 84.0 in from 2,200 to 2,800 lb, then a straight line to 90.0 in at 3,800 lb.
- Aft limit: 93.0 in at all weights.
Worked example
With the sample numbers above — pilot and front passenger 340 lb, aft baggage 20 lb, fuel (usable) 240 lb and an empty weight of 2,430 lb at 85.5 in:
- Moments: 2,430 × 85.5 = 207,765; 340 × 80.5 = 27,370; 20 × 142.8 = 2,856; 240 × 95.0 = 22,800 (lb-in).
- Totals: 3,030 lb and 260,791 lb-in, so the takeoff CG is 260,791 ÷ 3,030 = 86.07 in.
- At 3,030 lb the envelope allows 85.38–93.00 in, so the takeoff point is inside the limits.
- After burning 12 gal (72 lb at 95.0 in) the landing weight is 2,958 lb with the CG at 85.85 in — still inside. Burning fuel moves this airplane's CG forward, because the fuel sits behind the CG.
The empty weight and empty CG differ from one PA-44-180 to the next — always use the current weight-and-balance record for the tail number you are flying. Fuel is 6 lb per US gallon (avgas).
Save your PA-44-180 once, reuse it every flight
In TOGA EFB you register each tail number's empty weight and CG once; the loading sheet, envelope check and briefing sheet use it from then on — offline too.
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