[Ken] recently obtained an attitude indicator—sometimes called an artificial horizon—from an F-4 fighter jet. Unlike some indicators, the F-4’s can rotate to show pitch, roll, and yaw, so it moves in ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This instrument, manufactured by Lear ...

A AC -- Advisory Circular. ACARS -- Airline Communications Addressing and Reporting System. ACAS -- Aircraft Collision Avoidance System. ADC -- Air Data Computer. ADF -- Automatic Direction Finder.