Airspeed Indicator, 700MPH, Army Type F-2, US Army Air Corps, WWII B-17 The knob rotates and adjusts

The knob rotates and adjusts the barometric card

This would relieve the pilot of having to manually release the bomb and allow him to focus on the target and the dive maneuver itself

as used in the US Air Force's first jet fighter

ambient) Air Temperature Indicator

and appeared on the F4 Phantom II (see photo)

Airspeed Indicator, 700MPH, Army Type F-2, US Army Air Corps, WWII B-17 The knob rotates and adjustsThe Army Type F 2 Airspeed Indicator was used across a number of US Army Air Corps and Air Force aircraft during WWII, including heavy bombers B 17, B 24, B 29, medium bombers B 25 and B 26, as well as light bomber A 20, according to the Accessories Interchangeability Chart dated Feb 1945. It was also used in versions of US Army Air Force WWII fighters P 38, P 39, P 40, P 47, and P 51. This F 2 was made by Kollsman, part number 586BK0142, and has a