The Model 407 is a significantly improved development of the Bell 206L-4 LongRanger, with better range, payload, cruising speed and hovering ceiling.

The Model 47J series of helicopters was announced in 1954, it being decided that it would be produced alongside the 47G series.

The prototype of the Model 412 series was flown for the first time in August 1979, being an updated and refined development of the Model 212, having a new-design four-blade rotor in lieu of the two-blade unit, a shorter rotor mast assembly, and a more powerful engine and transmission system

Civil examples of the Iroquois series of medium lift helicopters have been operated around the World over the years, a number being operated in South-East Asia by Air America during the Vietnam War.

Probably one of the most, if not the most, produced helicopters in the world, the Bell 47 series began when the Bell Aircraft Corporation commenced the development of helicopters in 1941 and flew the first of five experimental two-seat prototypes in 1943, the first being known as the Model 30

The prototype of the Ecureuil (Squirrel) light utility helicopter, powered by a Lycoming LTS 101 turboshaft, was flown for the first time on 27 June 1974. On 14 February 1975, the second prototype was flown, powered by the French Arriel turboshaft. The type subsequently entered production France at an initial

In the 1950s Messrs T G Adams and Paul Wilson in California designed and developed a single-seat light sporting helicopter for private use. After a prototype was completed and tested, they produced plans for construction of the machine, then known as the Adams Wilson Hobbycopter, for sale to amateur constructors.

This light single-seat helicopter was built in the Melbourne suburb of Black Rock and is believed to have been completed in about 1948. It took about two-years to complete and is thought to be, if not the first, one of the first helicopters designed and built in Australia.