NASA used an F-8C for its Digital Fly-by-Wire Program-the first digital fly-by-wire aircraft to operate without a mechanical backup system. This photo shows the Apollo hardware jammed into the F-8C. The computer is partially visible in the avionics bay a
is a means of aircraft control that uses electronic circuits to send inputs
from the pilot to the motors that move the various flight controls on
the aircraft. There are no direct hydraulic or mechanical linkages between
the pilot and the flight controls. Digital fly-by-wire uses an electronic
flight control system coupled with a digital computer to replace conventional
mechanical flight controls.