All Piston and Turboprop Airliners

Airliners driven by propellers, whether piston engines or turboprops, which carried passengers across continents and oceans before jet airliners took over the long routes in the late 1950s and 1960s. An entry belongs here when the cited article names a propeller-driven, four-engined or turboprop airliner. It excludes jet airliners and military transports derived from airliners. Entries are placed by what their own cited article says, so each one sits in the narrowest group its source supports, and the group page lists it beside the other members.