If the center of gravity is too far aft, an
unstable tail-heavy condition is created, thereby
increasing the tendency of the aircraft to stall.
This condition definitely limits low power and
may adversely affect the long-range optimum
speed of the aircraft. In the extreme condition,
this location of the center of gravity may cause
a stall during an updraft of air. It definitely
decreases the speed and range of the aircraft and
increases pilot strain during instrument flying.
There is also a tendency to aggravate the deicer
effect on high-wing aircraft.
A standard program for weight and balance
control has been established to aid in the
prevention and correction of unsatisfactory flight
conditions resulting from improper loading. The
result has been greater safety and operating
efficiency. Under this system, weight and balance
can be checked for takeoff and landing conditions
and for changes during flight by calculations, or
by use of balance computers. A balance computer
(sometimes called a load adjuster) is a precision
calculating instrument similar in operation and
appearance to a slide rule.
WEIGHT AND BALANCE SYSTEM
The requirements, procedures, and responsi-
bilities for weight and balance control of Navy
aircraft are listed in USN Aircraft Weight and
Balance Control, NA 01-1B-50. This technical
manual lists the two weight and balance classi-
fications for Navy aircraft, class 1 and class 2
Figure 6-20.-Weight and Balance Classification of Naval Aircraft.