Engine Pressure Ratio Indicator B-24 The mach number limit is
$14.00
Description
The mach number limit is adjusted for the specific aircraft model by turning the inset screw on the rear case prior to installation
and was likely used on a US Air Force or US Navy aircraft during the 1950's
The F marker was set to the desired Acceleration Altitude
mso-pagination:widow-orphan
and A-20 Havoc
Engine Pressure Ratio Indicator B-24 The mach number limit isHere is a 1950 60's era Engine Pressure Ratio Indicator made by AiResearch. EPR indicators were used in jet engine aircraft. The glass is slight cracked at the 2 3 o'clock position. Measures ~2 inches diameter and ~5 inches deep. See photos.
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