US$ 18.71
Engine Pressure Ratio Indicator B-24 so this might have been
$14.00
Description
so this might have been intended for an installation where this functionality was disabled
The mach number limit is adjusted for the specific aircraft model by turning the inset screw on the rear case prior to installation
see photos
Mounted on the fuselage of a B-24 or B-29 bomber
Engine Pressure Ratio Indicator B-24 so this might have beenHere 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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