A Bell 47G-3B1 helicopter manufactured in 1966 taking off from Warnervale Airport, NSW, Australia. It is powered by a turbocharged 280 hp (209 kW) Lycoming TVO-435.
"The Bell 47 is a single-rotor single-engine light helicopter manufactured by Bell Helicopter. It was based on the third Bell 30 prototype, which was the company's first helicopter designed by Arthur M. Young. The 47 became the first helicopter certified for civilian use on 8 March 1946." - from Wikipedia