Fuel Pressure Indicator, Dual Engine, 0-25 PSI, AN-5772TIA US Navy P-51 A "zero center" ammeter

A "zero center" ammeter

MsoNormalTable {mso-style-name:"Table Normal"

which is designated by a vertical dash on this one and by a small aircraft silhouette on the I-65)

The indicator measures the temperature of the cylinder head via thermocouple from a single engine

Used to alter the Heading Index

Fuel Pressure Indicator, Dual Engine, 0-25 PSI, AN-5772TIA US Navy P-51 A "zero center" ammeterHere is a 1940 50s era dual engine Fuel Pressure Indicator made by Edison PN 34955, for aircraft of the US Navy. See photo showing the yellow USN anchor symbol stamped on its back case. Also, a service stamp has been affixed to its side indicating it was once serviced at NAF DET, or Naval Air Facility Detroit (MI). It may have been used in a dual engine aircraft (such as the PBY Catalina or PBM Mariner), or paired with another in a four engine