The Enstrom Helicopter Corporation is an American helicopter aerospace manufacturer, based at the Menominee–Marinette Twin County Airport in Michigan, United States. The company was founded in 1959 by mining engineer Rudolph J. "Rudy" Enstrom, initially as the R.J. Enstrom Corp. The company was bought by the Chongqing Helicopter Investment Corporation in 2013 and went out of business in January 2022. purchased the company from bankruptcy in May 2022 with the intention of restarting production.