§3.44 Weights.

Reference sections Empty weight: The actual weight used as a basis for determining operating weights 3.73 Maximum weight: The maximum weight at which the airplane may operate in accordance with the airworthiness requirements 3.74 Minimum weight: The minimum weight at which compliance with the airworthiness requirements is demonstrated. 3.75 Maximum design weight: The maximum weight used for the structural design of the airplane. 3.181 Minimum design weight: The minimum weight condition investigated in the structural flight load conditions, not greater than the minimum weight specified in §3.75. 3.181 Design landing weight: The weight used in the structural investigation of the airplane for normal landing conditions. Under the provisions of §3.242, this weight may be equal to or less than the maximum design weight. 3.242 Unit weights for design purposes: Gasoline....................... 6 pounds per United States gallon. Lubricating oil.............. 7.5 pounds per United States gallon. Crew and passengers.... 170 pounds per person.