What is a primary advantage of a two-blade rotor system?

The primary advantage of a two-blade rotor system lies in its simplicity and reduced weight. A two-blade system has fewer components compared to multi-blade rotor systems, which simplifies the design and reduces the overall structural complexity of the helicopter. This simplicity not only minimizes the potential for mechanical failures but also leads to a lighter rotor system, which contributes to improved fuel efficiency and the ability to lift heavier payloads relative to its power.

This weight reduction is particularly advantageous in applications where performance and load capacity are critical, making two-blade systems popular in many design scenarios where maneuverability and efficiency are prioritized. Other rotor configurations, while offering benefits in specific areas such as stability or lift performance, tend to add complexity and increase weight, which can counterbalance these advantages.