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

This example is in nice condition given its age

landing of gliders and maintaining airborne supply operation to isolated positions

Here is a fine example of the Reflector Gun Sight

Flange diameter

and the back showing photos or renderings

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