Airspeed Analytical Instrument, Luftwaffe ME-109 and F6F-5N

and F6F-5N

Power venturi tubes provide a source of vacuum for the operation of air-driven instruments such as directional gyros

indicating the manufacturing year 1941

BMEP is the acronym for Brake Mean Effective Pressure

conducted I deduce that the yoke is a later post war version

Airspeed Analytical Instrument, Luftwaffe ME-109 and F6F-5NThis interesting device appears to be a WWII era or post war Airspeed Analytical Instrument. Likely a bench instrument and not used in flight. On the rear of the cabinet is a static pressure port, which leads to a bellows inside of the device, which is further connected to the internal mechanical apparatus of the instrument. A lever responds to the differential pressure applied to the device, which then rotates the pointer on the display. An airspeed