The Robinson Helicopter Company produces light rotor-craft carrying either two or four passengers. According to an FAA Special Airworthiness Information Bulletin, ASW-95-01 (January 1, 1995) "Do not fly if any of the following conditions exist: surface winds (including gusts) exceeding 25 knots, surface wind gusts exceeding 15 knots, wind shear forecast or observed, and/or turbulence forecast or observed to be moderate, severe or extreme. Turbulence is a function of several factors, predominately gross weight. Relatively light gross weights make the R-22 and R-44 more susceptible to the effects of turbulence. Most notably, main rotor flapping and aircraft attitude are affected by turbulence and can lead to blade stall, abrupt control inputs in response to uncommanded attitude deviations and, ultimately, mast bumping."
McDonnell Helicopters produces light turbine helicopters carrying four passengers. Wind limitations for this aircraft are steady winds of higher than 40 knots below 500 feet above ground level (AGL), with a gust spread of plus or minus 15 knots. Beyond 500 AGL, the FAA certifies 50-knot winds as safe for flight.
Eurocopter is a dual-turbine, light-helicopter manufacturer headquartered in Marseilles, France. The company does not describe specific transient wind limitations on its placarding. However, the aircraft's specifications call for a Velocity never exceed (Vne) of 140 knots at a full-gross weight of 6,415 lbs. The company expects that operators will take appropriate local procedures to ensure they never exceed Vne limitations.