What is the RCR value for a dry runway?

The RCR, or Runway Condition Reading, is a numerical value that represents the level of friction available on a runway, which is crucial for safe aircraft operation during takeoff and landing. A dry runway typically has a high RCR value, indicating good traction.

For a dry runway, the value of RCR is established at 23, reflecting optimal conditions for aircraft performance. This number is derived from standardized measurements taken under typical dry conditions, where there are no contaminants influencing the runway surface. This level of RCR suggests that the aircraft can effectively decelerate during landing and achieve the necessary takeoff thrust without concerns over runway friction.

Understanding the RCR values helps pilots assess runway performance under varying conditions, thereby increasing safety and operational efficiency. The values vary significantly for other runway conditions, such as wet or icy surfaces, which is why knowing the specific value for a dry runway is crucial for pilots.