Pressure Altitude Calculator for Rolls Royce Dart 534-2 Engine (NOS) Short Sunderland This example is marked AF

This example is marked AF USARMY on its face and had a serial number prefix of AF-42

evidence of a manufacturing year on or before 1943

000 lb capacity Center Main fuel tank

The knob rotates the compass card when pushed in and turned

Engraved on the inside bottom of the panel is a very small Japanese character above the number 8 9 1 which is below a 3-petal floral emblem or logo with a Japanese character in it's center

Pressure Altitude Calculator for Rolls Royce Dart 534-2 Engine (NOS) Short Sunderland This example is marked AFThis is an interesting little gizmo. It is labeled as an "indicator" for use with the Rolls Royce Dart 534 2 Turboprop engine in 1971. This description is from a knowledgeable visitor, Allen in Canada: "It is used to calculate the fuel trim setting for the particular temperature and pressure altitude. You align the current temperature with the pressure altitude of the airport. Then read the fuel trim setting to be used for takeoff." The Dart engine