N631DP

N631DP is an Enstrom Helicopter Corporation 280FX operated by HERITAGE ROTORS LLC. SkyMeter has tracked 10 flights totalling 12 hours of airtime via ADS-B across 2 callsigns. Service window in our records spans 138 days. The Enstrom Helicopter Corporation 280FX has a maximum takeoff weight of 2,600 lb, light wake category.

About the Enstrom Helicopter Corporation 280FX

The Enstrom 280FX Shark is a light three-seat piston helicopter built by Michigan-based Enstrom Helicopter Corporation, a design lineage stretching back to the original F-28 of the 1960s. The 280FX variant introduced in the 1980s features a turbocharged Lycoming HIO-360-F1AD engine producing 225 horsepower, giving it improved hot-and-high performance compared to earlier naturally aspirated models. With its distinctive streamlined fuselage and fully articulated three-blade rotor system, the Shark carved out a niche in the owner-flown and light utility market where operators valued its docile handling, relatively low operating costs, and excellent visibility from the bubble canopy.

The 280FX's performance envelope includes a maximum cruise speed around 105 knots and a never-exceed speed of 120 knots, with a service ceiling near 12,000 feet and useful load approaching 900 pounds. Its compact footprint and modest fuel burn made it popular for pipeline patrol, ranching operations, flight training, and personal transport across North America. While never produced in the volumes of Robinson or Schweizer designs, the Enstrom earned a loyal following among pilots who appreciated its stable flight characteristics and rugged construction, particularly in the mountain West and Canadian bush operations.

Enstrom's production has been intermittent over the decades, with ownership changes and market pressures leading to periods of dormancy, but the type remains supported and occasionally still manufactured in small numbers. The 280FX represents the classic American light helicopter ethos: simple systems, proven piston power, and a design optimized for the private owner-operator rather than high-volume commercial service. SkyMeter has tracked flights across airframes and operators, with the largest observed operator.