Flight Computer Indicator Type A-1 & A-2 and Zero Reader Lancaster The mach number limit is

The mach number limit is adjusted for the specific aircraft model by turning the inset screw on the rear case prior to installation

multi-component aircraft radio receiving and transmitting system (see 2-page description in photo gallery)

such as the US Army Air Force P-51 Mustang and US Navy Fighter F4U Corsair

Two BC-434-A Remote Control Boxes

Flight Computer Indicator Type A-1 & A-2 and Zero Reader Lancaster The mach number limit isThis is a Cold War era Flight Computer (Zero Reader) Indicator used on versions of the US Air Force F 86D Sabrejet, F 89 B & C Scorpion, and F 94C Starfire jet fighters. Made by Sperry, part number 673230, with a serial number prefix of AF 51, evidence of a manufacturing year of 1951. According to the F 89 Flight Manual, the flight computer electronically combines attitude, altitude, heading, and radio information to advise the pilot that the aircraft