Founded in 1959, Enstrom Helicopter Corporation manufactures a complete line of helicopters including the three-place, piston-powered F28F and 280FX, and the turbine-powered 480B. The 480B also is available as a three-place advanced trainer or as a three- to five-place VIP aircraft. For law enforcement applications, the 480B is known as the Guardian and the F28F is called the Sentinel.