What is the maximum angle allowed for a rotary wing aircraft on final approach when entering the traffic pattern?

The maximum angle allowed for a rotary wing aircraft on final approach when entering the traffic pattern is 30 degrees. This angle provides a good balance between safety and maneuverability. It allows the helicopter to maintain a stable and controlled descent while aligning itself with the landing zone effectively. A 30-degree angle is generally considered optimal for ensuring that the helicopter can adjust its position as needed without compromising its ability to execute a safe landing.

Using a more acute angle, such as 15 degrees, may limit the options for aligning with the rotor wash and could pose challenges during the approach. Conversely, angles larger than 30 degrees could result in an unstable approach or make it more difficult to maintain the required airspeed and altitude control. Thus, 30 degrees is established as a standard to enhance safety and efficiency during the final approach phase for rotary wing aircraft.