Attitude Indicator, Type ARU-11/A, USAF F4 Phantom II H-21 It was also used in

It was also used in the fighter P-40F Warhawk according to its service manual

This is an original document and not a reprint

5 inches by ~7 inches

This indicator displayed the flap position for each of 3 pairs of flaps:  Inboard

to turn the aircraft to put it on the desired course as set in the autopilot system

Attitude Indicator, Type ARU-11/A, USAF F4 Phantom II H-21 It was also used inThis is a Cold War Vietnam War era Attitude Indicator type ARU 11 A, made by Lear, Model 4060P, part number 139001 01 04, MIL I 27610. This instrument appeared on the pilot's instrument panel of the US Air Force F4 Phantom II jet fighter. This unit has a service label from McClellan Air Force Base in Sacramento CA dated 1984. The purpose of the instrument is to rapidly indicate to the pilot the attitude, or relationship, of the aircraft with respect