A weight and balance calculator for the Piper PA-38 Tomahawk. Enter the weight (in pounds) for each position in the aircraft, and the amount of fuel (in gallons), and the calculator will let you know if you are out of limits on weight or CG. The forward and aft CG limits are calculated using formula derived from the aircraft limit chart. The seat arms can be selected into any of the 6 positions as listed in the POH.