Turn and Bank Indicator
The turn and bank indicator (fig. 7-18) shows the
correct execution of a turn and bank. It also shows the
lateral attitude of the aircraft in straight flight.
A turn and bank indicator is really two instruments
mounted as a single unit. The turn indicator is a gyro
mounted in a frame that is pivoted to turn on a
longitudinal axis. The direction of a turn is shown on
the dial by a pointer. The distance the pointer moves to
the right or left is proportional to the rate of the turn.
The other half of the instrument, the bank indicator,
is not a gyro instrument. It consists of a glass ball that
moves in a curved glass tube filled with a liquid,
consisting of 50% alcohol and 50% glycerin. The tube
7-12
15 RIGHT TURN
10 NOSE UP
30 LEFT TURN
6 NOSE DOWN
GYRO REMAINS CONSTANTLY UPRIGHT
DURING MANEUVERS; AIRCRAFT
REVOLVES AND PITCHES
AROUND AND ABOUT THE GYRO
O
O
O
O
ANF0717
SPHERE
Figure 7-17.—Roll and pitch indications.
ANF0718
Figure 7-18.—Turn and bank indicator.
