The C212 Aviocar was a development of the CASA Aviocar STOL military aircraft designed to replace the Junkers Ju-52 and the Douglas C-47 in Spanish Airforce service.

In 1972 Piper added the PA-31-350 Navajo Chieftain to its range. The overall length had been increased by 0.61-m (2-ft), thus allowing for a 20-percent increase in overall cabin volume to provide accommodation for up to nine passengers plus the pilot in a commuter/charter aircraft role.

In 1956 Grumman set out to produce a long-range transport capable of operating to airline standards to replace the large number of Douglas DC-3s and similar types serving as business and executive aircraft in the USA.

The Dove was designed and the end of World War II to replace the superseded DH-89 Dragon Rapide.

The story of the Jetsteam goes back to 1965 when Handley Page designed the HP-137 Jetstream business aircraft powered by two 634-kw (850-eshp) Turbomeca Astazou XIV turboprops, the prototype of which was flown for the first time on 18 August 1967.

The Trislander was developed from the twin-engine Islander, and had the same fuselage cross-section and mainplane.

The Beech 99 series was designed to meet the requirements of commuter operators around the world for a 16-passenger airliner powered by two Pratt & Whitney PT6A turboprop engines.

The Beech 1900 is a 19-passenger and crew of two pressurised airliner based on the Beech 200 Super King Air.

At the conference of the US Regional Airlines Association in 1989 Beech announced it would produce a new variant of the 1900C known as the 1900D.

The first large twin-engine aircraft built by the Beechcraft Corporation, the Queen Air series of aircraft was introduced to the company’s range in 1958.