Enstrom F-28Enstrom F28 helicopter model. The Enstrom F 28 is a piston engined lightweight utility helicopter manufactured by Enstrom Helicopter Corporation, United States. This multipurpose helicopter can be used in a variety of missions including troop transportation, military and civil training, agricultural operation business, air surveys and law enforcement in all climatic conditions. The first F 28 helicopter flight took place in May 1962 and began