The compressor stages are primarily of which type?

The compressor stages are primarily of which type?

• A. Centrifugal
• B. Axial
• C. Radial
• D. Mixed-flow

Answer: (B)

The main idea is that helicopter turboshaft engines use multi-stage axial-flow compressors. Air is drawn in and passed through several rotor-stator pairs arranged along the engine axis. Each stage adds a small amount of pressure while keeping the flow moving forward, allowing a large air mass to be compressed efficiently in a compact, high-speed package. That axial arrangement is ideal for the high flow and compact size required in rotorcraft engines like the UH-60S. Centrifugal (radial) compressors deliver larger pressure rises per stage but are less suited for the high flow and multi-stage efficiency needed here, so they aren’t the primary type used for the compressor.

The main idea is that helicopter turboshaft engines use multi-stage axial-flow compressors. Air is drawn in and passed through several rotor-stator pairs arranged along the engine axis. Each stage adds a small amount of pressure while keeping the flow moving forward, allowing a large air mass to be compressed efficiently in a compact, high-speed package. That axial arrangement is ideal for the high flow and compact size required in rotorcraft engines like the UH-60S. Centrifugal (radial) compressors deliver larger pressure rises per stage but are less suited for the high flow and multi-stage efficiency needed here, so they aren’t the primary type used for the compressor.