Disc loading is critical to determining Vi; the greater the disc loading, the higher the induced velocity and hence downwash velocity. Decreasing the disc loading, by reducing mass or …

2023年10月26日 · It provides a state of the art on the helicopter downwash related hazards, as well as best practices on their mitigation in the field. The document was developed based on a …

The impact of helicopter blast effects has been identified by the State Safety Program (PSE, Horizon 2023 strategic plan). This 5-year safety roadmap for the DGAC France has identified, …

The velocity of the downwash reaches its maximum at about 2 rotor diameters below the disc. The Enstrom 480B, for example, has a maximum downwash speed of about 45 knots. The …

2024年1月29日 · Helicopter rotor downwash is an often misunderstood topic that deserves more attention. We dive into how rotor downwash works and what the threats are!

2024年8月12日 · Helicopter wake can cause significant downwash, with velocities up to 100 feet per sec near the rotor, affecting the ground or water surfaces below and potentially leading to …

Real-time velocity measurements are incorporated into a recursive Bayesian estimator to localize a nearby rotorcraft using its downwash. A path planner developed for proximity ight is …

Rotor downwash is a commonly ignored phenomenon that occurs during helicopter hover in close proximity to a ground surface. It has the potential to cause significant damage to nearby …

the technique of helicopter downwash for fog dissipation was used. Met-eorological and microphysical data collected during the experiment are presented. Meteorological data …

2008年10月15日 · Rotorcraft brownout is caused by the entrainment of dust and sand particles in helicopter downwash, resulting in reduced pilot visibility during low, slow flight and landing. …