Mass & balance
Weight, arm, moment — then look at the envelope.
A classroom 172 and a classroom PA-28. Move the people, the fuel, the bags. See the CG walk. Training aid only. The POH of the aircraft you fly is the only legal one.
Typical training-school numbers for a 172-class single. Not a serial, not an AFM, not for flight.
Empty weight
arm 39.6 in · 1667 lb
Locked empty weight — a real POH number will differ.
Front seats
arm 37.0 in · 340 lb
Rear seats
arm 73.0 in · 0 lb
Usable fuel
arm 48.0 in · 240 lb
Baggage
arm 95.0 in · 20 lb
Weight
2267 lb
CG
40.6 in
Moment
92,013
Inside the classroom envelope.
Arms in inches from a classroom datum. Fuel at 6 lb/USG. Not an AFM, not a weigh-in, not for flight. Use the POH for the aircraft you actually fly.
Empty weight and arms on this page are typical training-school figures. They are not a weigh-in for a tail number. Do not take off on these numbers. Legal. Fuel and TAS live on the E6B.
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