Searey LSA - 6.1.1.2.1 Gross Weight; 6.1.1.2.2 Useful Load; 6.1.1.2.3 Maximum;Minimum Weights; 6.1.1.2.4 Center of Gravity (C.G.)

Searey LSA – Pilot’s Operating Handbook Version 5.0, Revision 8
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WARNING: Any time a major alteration, modification, or repair is
performed on the aircraft, its new Empty Weight must be determined by
either weighing the aircraft again, or by accurate calculation of the weight
changes and their effect on Empty Weight Center of Gravity (EWCG)
location. A major alteration or modification results from the addition,
deletion, or redistribution of existing equipment and accessories, or from
a repair, which results in a significant increase of weight of the airframe or
engine. For example: addition or removal of battery, radios, installation of
a larger fuel tank or engine, painting the airframe, installation of heavier
wheels and tires, etc.
6.1.1.2.1 GROSS WEIGHT
The maximum weight for which an aircraft’s structure and performance
have been approved for normal operations by its manufacturer. It is the
maximum weight (Empty Weight plus useful load) at which an aircraft can
be safely operated. Maximum takeoff weight must never exceed the
published Gross Weight.
6.1.1.2.2 USEFUL LOAD
The total amount of weight available for pilot, passengers, baggage,
cargo and in-flight usable fuel.
6.1.1.2.3 MAXIMUM/MINIMUM WEIGHTS
Due to certain balance, structural and aerodynamic considerations,
sometimes a maximum or minimum weight may be specified for certain
locations on the aircraft.
6.1.1.2.4 CENTER OF GRAVITY (C.G.)
A point along an aircraft’s longitudinal axis at which all the loads and
forces are perfectly concentrated and balanced.
6.1.1.2.5 CENTER OF GRAVITY RANGE
The horizontal distance, along an aircraft’s longitudinal axis, within which
an aircraft has been found to be fully maneuverable at all specified design
speeds, weights and loading configurations. All aircraft are designed to
operate within a specific center of gravity range.
6.1.1.2.6 MAXIMUM FORWARD/MAXIMUM AFT C.G. LOCATIONS
Every aircraft has specified a forward most and rear most center of gravity
location, along its longitudinal axis. These center of gravity location limits
are given from a convenient reference (datum) on the aircraft.
6.1.1.2.7 DATUM
A convenient reference point along the longitudinal axis of an aircraft from
which all horizontal measurements are taken.
6.1.1.2.8 WEIGHT