Westland Whirlwind helicopter Info Site
History
The first prototype British Whirlwind HAR.1 flew in 1953, with the 600 hp Pratt & Whitney R-1340-40 Wasp, and it entered service shortly afterwards. They served in non-combat roles, including search and rescue and communications functions. The HAR.3 had a larger 700 hp Wright R-1300-3 Cyclone 7 engine. It was not until 1955 that the HAR.5 flew for the first time with a British power plant, the Alvis Leonides Major.
The HAS.7 become the first British helicopter designed for anti-submarine work in the front-line when it entered service in 1956. It was equipped with radar and dipping ASDIC for submarine detection and designed to be equipped with a torpedo, but could not carry both simultaneously. In this version the engine was a 750 hp (560 kW) Alvis Leonides Major 755/1. This helicopter had a hovering ceiling at 9,400 ft and a range of 334 miles at 86 mph.
Later in their lives, some HAR.9s were converted to use the Rolls-Royce Gnome turbine engine.
From its start with the Navy, the Whirlwind came to be used by the British Army and RAF. More than 400 Whirlwinds were built, of which nearly 100 were exported to the foreign customers.
