ARP1217B Instrumentation Requirements for Turboshaft Engine Performance Measurements

This SAE Aerospace Recommended Practice (ARP) provides guidance on the engine performance parameters that may be selected by airframe and engine manufacturers, and used by a pilot or operator, to monitor the thermodynamic health of a turboshaft engine installed in a rotorcraft and the measurement system accuracies desired. Different accuracies may be required for in-flight operations such as engine control.