Cabin Altitude and Differential Pressure Indicator, F-89B Scorpion P-51 At 145 pages

At 145 pages

but otherwise it is in fine condition for its age

Was also installed with a "formation stick" controller in some aircraft

the system was designated AN/ARN-11

Cabin Altitude and Differential Pressure Indicator, F-89B Scorpion P-51 At 145 pagesThis is a Cabin Altitude and Differential Pressure Indicator as used in USAF's Cold War era Fighter Interceptor F 89 B Scorpion. See photo of the instrument panel from the F 89 B Flight Manual dated 1958, the indicator appears as item 12 on the right side of the panel. The indicator has two pointers one for Cabin pressure altitude, and the other for Outside pressure altitude, each which rotate as the pressures change, the differential pressure being