Piper PA-18 Super Cub — Weight And Balance

This document serves as a guide for understanding the weight and balance calculations specific to the Piper PA-18 Super Cub. It outlines essential terms and formulas necessary for determining the center of gravity (CG) of the aircraft. The document emphasizes the unique aspects of the PA-18's design, particularly the location of the datum and the implications for weight and balance calculations. It is aimed at pilots and aviation enthusiasts who need to perform weight and balance checks on the PA-18, ensuring safe operation within the aircraft's CG limits.

• The PA-18's datum is 60 inches ahead of the wing leading edge.
• At max gross weight of 1760 lbs, CG range on floats is 16.2 to 20 inches aft of the wing leading edge.
• At 1410 lbs, CG range is 11.1 to 20 inches aft of the wing leading edge.
• Total moments divided by total weight gives CG; subtract 60 inches to find the actual CG position.
• CG limits vary with gross weight; for example, N645DT's gross weight is 2000 lbs.