CAA NZ Basic Turbine Knowledge (Helicopter) Exam Practice Questions - CAA NZ Basic Turbine Knowledge (Helicopter) Exam (New Zealand) Exam

What does the abbreviation N1 (or Ng) signify in turbine helicopter engine instrumentation?

Rotational speed of the gas producer/compressor spool as a percentage of maximum RPM Rotational speed of the free power turbine output shaft driving the main transmission Main rotor speed expressed in revolutions per minute Total effective torque output percentage delivered to the main gearbox

Correct Answer:

Rotational speed of the gas producer/compressor spool as a percentage of maximum RPM

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