Installation and Maintenance of Aircraft Instruments, Oct 1941 Wellington but with markings for engines

but with markings for engines 1 & 2 or L & R

It was published in March 1942 under the authority of the Secretary of the Navy

which is measured by comparing the linear scale nearest the eye to the scale at the bottom of the sight

See spec sheet for details

part number 321-1177

Installation and Maintenance of Aircraft Instruments, Oct 1941 Wellington but with markings for enginesThis is a pre WWII instructional manual Installation and Maintenance of Aircraft Instruments published by the Middleton (PA) Air Depot in October 1941. Middleton Air Depot was a major support center for aircraft of the US Army Air Corps. This 30 page manual reviews the basics of installation and maintenance of the most common instruments in use at the time. It also includes diagrams of instrument panels of specific aircraft showing the location of