Which stage of the engine compressor references the N1 gauge on the CRJ-700?

The N1 gauge on the CRJ-700 references the single-stage fan, which is the component responsible for monitoring the speed and performance of the engine at lower power thresholds. The N1 speed essentially indicates the rotational speed of the fan that delivers airflow through the engine, contributing to both thrust and the operation of other engine systems.

In the context of jet engines, N1 is critical for understanding performance metrics that are essential for both normal operations and during specific flight phases like takeoff and climb. The single-stage fan provides the majority of the thrust at lower altitudes and speeds, making it a vital parameter to monitor through the N1 gauge.