Turn and Slip Indicator 2 Minute Turn, Type MD-4A, MIL-I-7627A C-46

Turn and Slip Indicator 2 Minute Turn, Type MD-4A, MIL-I-7627A C-46This Turn and Slip Indicator Type MD 4A, MS28041, MIL I 7627A, 2 minute turn, was made by RC Allen. The case is open, and the internal mechanism can be removed to reveal the electrical gyroscope. Likely from the 1960s. It is in experienced condition given its age. The dial markings are clear and the glass is intact. Measures 2. 25inches diameter by ~5inches deep.

The manual covers instruments that were eventually used in aircraft of the Air Corps US Army and Air Force US Army during WWII

According to the Maintenance Interchangeability gude dated Feb 1945

A-26 Invader

The co-driver had the same layout

prompting a left/right turn towards the station

The two auxiliary pointers located behind the main pointer rotate to indicate the maximum negative or positive G's experienced by the aircraft until reset by turning the knob clockwise

3in square

made by Weston

stamped Jan 1970

as there are no scratches or wear marks

Beam Displacement Scale

and year of manufacture