WELLINGTON HELICOPTER

Bell ?
US Army used in Korean War (TV series M.A.S.H. opening scenes)
British Army used them until late 1970's (A.K.A. the Sioux), replaced by the Westland - Aerospatiele Gazelle.

The famous Bell 47 - with bubble cab and 'balancer beam' two blade rotor.
Know by many children in the 1950s/1960s as the 'Whirlybird' from the US TV series.

US Army designation was H13 Sioux.

Produced under licence in the UK by Westland, and Italy by Augusta.

A later model with the big bubble was used in Vietnam,if it crashed the bubble broke lose and rolled away and saved the pilot. I believe it was made by Hughes aircraft and called the LOH.

The Light Observation Helicopter (LOH) program was a United States Army program to evaluate, develop and field a light scout helicopter to replace the Army's aging OH-13 Sioux. The program gained impetus with the advent of the Vietnam War and was aided by advances in helicopter technology, specifically the development of the turboshaft engine. Three of the aircraft evaluated for the program would eventually enter military service, one as a training helicopter and two as observation helicopters used for battlefield reconnaissance missions.