Static labelled overviewSelected: Turbofan Booster

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Read about Low-pressure compressor

Guided journey

Core airflow: intake to exhaust

Follow the working fluid through the generic two-spool turbofan before tracing the shafts that return turbine work to the compressors and fan.

Step 1 of 8Intake

The intake presents the incoming air to the fan.

Trace the system

What connects to this part?

Identify the part

Find it in the model

Test spatial recall with the four reviewed low-pressure-system concepts.

Compare mode

See the difference

Comparison

Compare where each high-lift device sits and how it changes the wing.

Compare	Trailing-edge flap	Leading-edge slat
Location	Inboard trailing edge	Wing leading edge
Primary effect	Increases camber and often area	Opens a slot that delays separation
Exam distinction	Adds substantial lift and drag	Helps sustain attached flow at high angle of attack

Reviewed FAA source (2026-09-09)

Low-pressure compressor

The low-pressure compressor, also called a booster in this model, raises the pressure of core air before it reaches the high-pressure compressor.

Where it is: In the core flow behind the fan and ahead of the high-pressure compressor.
What it does: It begins the staged compression of the core stream.
Relationship: It shares the low-pressure spool with the fan and low-pressure turbine.
Common confusion: It does not compress the bypass stream. Bypass air leaves the core path after the fan.

Check yourself

Without looking back, can you explain where the low-pressure compressor is, what it does, and which component drives it or is driven by it?

Scope: Generic two-spool high-bypass turbofan teaching model. Reviewed 2026-09-09.