Radio Compass Indicator I-81-A Sparks of SCR-269-G and AN/ARN-7 F6F Hellcat this was for the front

this was for the front reserve tanks

EPR indicators were used in jet engine aircraft

producing the N1 in quantity in late 1950

with a maximum ceiling of 20

Radio Compass Indicator I-81-A Sparks of SCR-269-G and AN/ARN-7 F6F Hellcat this was for the frontThe I 81 A Radio Compass Indicator (aka Pilot's Bearing Indicator) is a component of the Radio Compass SCR 269 G system (which evolved into the AN ARN 7), used during WWII. According to the Airborne Radio Equipment Handbook of the Air Service Command dated 1943, this system appeared in versions of the US Army Air Force bombers B 17, B 24, B 25, B 26, B 29, and transports C 46, C 47, and C 54, as well as in any models of these aircraft used by the US