Intercept Officers Equipment Kit, Type I (Navigation Computer) 1943 Martin

Intercept Officers Equipment Kit, Type I (Navigation Computer) 1943 MartinThis is a WWII era navigation computer in a kit "Intercept Officers Equipment Type I. This example includes two 2 piece USAAF Ground Speed Timer Calculators (for map scales 1: 250,000 and 1: 500,000) and 2 USAAF Rulers. The bottom of the metal case contains a mechanical computer to solve the wind problem. It has a locking mechanism and a movable arm for drift, adjusted for air speed, interconnected to the heading tracker. The lid contains tables and a

This is an Altimeter used in military aircraft of the US Navy either during or post WW1

was the US's first air defense system (extensive history can be found here)

Air Corps US Army Type C-13 (also AN-5760-1)

It has a service stamp SMAMA (USAF Sacramento Air Materiel Area at McClellan AFB

As airspeed increased

25 inches diameter and ~2

with an interesting history

F-100 Super Sabre

or patrol observer

at USAF SBAMA (San Bernadino CA Air Materiel Area)

measuring vertical speed in a climb or descent from - 5 meters/second to + 5 meters/second

and of the axis nations