N857MW

N857MW is a Robinson R66 Turbine operated by ROCK CREEK AVIATION LLC. SkyMeter has tracked 240 flights totalling 297 hours of airtime via ADS-B across 2 callsigns. Service window in our records spans 465 days. The Robinson R66 Turbine has a maximum takeoff weight of 2,700 lb.

About the Robinson R66 Turbine

The Robinson R66 is a five-seat light turbine helicopter introduced in 2010, marking Robinson Helicopter Company's first turbine-powered design after decades of building piston-engine aircraft. Powered by a single Rolls-Royce RR300 turboshaft engine producing 300 shaft horsepower, the R66 brought turbine reliability and performance to the light helicopter market at a price point significantly below traditional turbine competitors. Its design evolved directly from the piston-powered R44, sharing similar airframe geometry but incorporating a larger cabin, higher gross weight, and the smoother power delivery characteristic of turbine engines.

The type quickly became popular for corporate transport, law enforcement observation, pipeline patrol, and flight training operations where operators wanted turbine simplicity without the acquisition cost of larger helicopters like the Bell 206 or Airbus H125. With a never-exceed speed of 140 knots, maximum gross weight of 2,700 pounds, and useful load around 1,100 pounds, the R66 occupies a sweet spot for missions requiring four to five occupants plus modest cargo over distances up to 300 nautical miles. Its Rolls-Royce engine requires inspections rather than overhauls at fixed intervals, and the airframe benefits from Robinson's reputation for straightforward maintenance and worldwide parts support.

The R66 has proven especially popular in Australia, New Zealand, and North America for ranch work, aerial survey, and utility operations where its combination of turbine reliability, relatively low operating costs, and adequate performance make it more practical than piston helicopters in hot-and-high conditions. SkyMeter has tracked flights across airframes and operators, with the largest observed operator.