The KC-518 is a five / six seat utility helicopter aimed at the amateur-built market. It is available as a kit light helicopter of advanced design featuring fibre and Kevlar composite construction.

Developed from the Sikorsky R-4 (the Vought Sikorsky Model 316A), which was the first helicopter produced for the US armed services in quantity, the Vought Sikorsky Model 327 followed the design layout, with main and tail rotors shaft-driven from an engine in the fuselage, but it was a completely new

Sikorsky began development of a general-purpose helicopter to meet US military requirements in 1948, a contract being received from the US Air Force for five examples of the new design, known as the S-55 or H-19.

The S-58 series was a development of the S-55 and was aimed at overcoming the range and carrying capacity deficiencies of the earlier machine.

In April 1971 Sikorsky received approval from the US FAA to convert a number of S-58s to turbine power using the PT6T-3 Twin Pac in order to increase the power and load carrying capacity of the machine, and to meet heavy lift requirements of a number of operators.

The MD900 Explorer was formally launched by McDonnell Douglas Helicopters as the MDX in January 1989.

The AB-139 was announced at the Farnborough Airshow on 8 September 1998 as a joint venture by the recently formed Bell/Agusta Aerospace Company, being a six-tonne midsize helicopter aimed at a range of civil applications and, once civil certification was obtained, to perform a variety of military missions, including search

The AW-169 is a development of the AW-139 and shares a common cockpit with the Company’s AW-139 and AW-189. It was designed for medical and search and rescue duties, law enforcement and passenger transport; and offshore and utility services and on the market competes with the EC-145, Bell 429 and

The AW-189 is a development of the earlier AW-139 and AW-169 and is a twin-engine helicopter designed by Agusta Westland. This is a Finmeccanica company and the helicopters are built in Italy by Leonardo, which was formerly known as Agusta Westland and merged with Leonardo Finmeccanica in 2016.

The AS 355 was a development of the AS 350 series with twin engines aimed at the police, ambulance, EMS and media role seating six persons, and more than 650 examples have been produced.

The A-109 series of helicopters aircraft was designed by Costruzioni Aeronautiche Giovanni Agusta SpA in Italy as a high-speed, high-performance, twin-engine helicopter, the basic commercial model accommodating a pilot and seven passengers.

The A-119 Koala made its public debut at the Paris Air show in June 1995, the prototype (I-KOAL) having flown earlier that year. The second prototype flew later that year and deliveries commenced in February 1996 to Omniflight Helicopters.