 The result was a new aircraft christened "Carvair" (derived from "car-via-air").Initially, it was thought that second-hand, pressurised Douglas DC-6 and Douglas DC-7 airframes could be converted into larger, "second generation" Carvairs within 15 years of the original DC-4-based Carvair's entry into service.The conversion of the original aircraft entailed replacing the forward fuselage with one longer, with a raised flightdeck in a bulbous "hump" (akin to the later Boeing 747) to allow a sideways hinged nose door.