Tachometer, Sensitive, Electric, US Navy B-17 7 mil ring reticle later

7 mil ring reticle later replaced by a more standard 70 mil ring reticle

item 16 on the panel)

The Mark 18 sight was used in some turrets of US Navy aircraft as well as in the cockpit of the Korean War-era F-86 Sabrejet fighter

Compass Scale

the Section developed numerous innovative training devices

Tachometer, Sensitive, Electric, US Navy B-17 7 mil ring reticle laterThis is a Sensitive Electric Tachometer, made by Bendix, part number 2234YZA9 28 A1, as Federal Stock number R88 I 2385 100 for aircraft of the US Navy both during and after WWII. Aircraft which used this tachometer included the US Navy fighters F4U 5 Corsair (per its Parts Manual April 1951) and F8F Bearcat (per its Erection and Maintenance Manual March 1948). It has also been identified visually in cockpit illustrations in the flight manuals of the