Airspeed Analytical Instrument, Luftwaffe ME-109 indicating the manufacturing year 1941

indicating the manufacturing year 1941

uncages the compass card which would then rotate right or left

With 11 sections plus appendix and index

BMEP is the acronym for Brake Mean Effective Pressure

"Armament & Fields of Fire

Airspeed Analytical Instrument, Luftwaffe ME-109 indicating the manufacturing year 1941This 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