 Thus Bell Helicopter (a division of Textron, Inc.) was building a factory to produce Model-214 helicopters in Isfahan.Northrop Corporation was also a joint partner in Iran Aircraft Industries, inc., which maintained many of the US military aircraft sold to Iran and was expected to produce aircraft components and eventually complete planes.These efforts represented a large share of US industrial involvement in Iran, and were a centrepiece of the Shah’s efforts to develop modern, high-technology industries.