Artillery Firing Calculator, USSR, 1944 Northrop Two of these indicators appeared

Two of these indicators appeared on the B-50's engineer's instrument panel (see photo)

With 11 sections plus appendix and index

see illustration from its Erection and Maintenance manual dated 1945

This instrument is stamped with a service date of June 1961 while serviced at SMAMA

This is a 1950's-era Attitude Gyro Horizon Indicator as used in the US Navy/Marine Corps Fighter Jet Grumman F9F-5 Cougar and the HUP-1

Artillery Firing Calculator, USSR, 1944 Northrop Two of these indicators appearedTrue, this is not aviation in nature, but it is an exceptional artifact from WWII. This is an original Soviet Army Artillery Firing Calculator, used in determining proper elevation and deflection (direction) when operating field artillery weapons. It was carried in the map document case worn by a Soviet artillery officer. The calculator contains diagrams and a graph, with rotating wheels and tabs, and made of material which permits writing in