Definition
An arrangement in which the output of one stage feeds directly into the input of the next, with each stage performing the same kind of action so the overall effect is built up step by step. In aviation systems, a cascade refers to components or processes connected in series so that each one acts on the result of the one before it, such as a cascade of turning vanes that progressively redirects airflow, or a cascade of compressor stages that each adds a further increase in pressure.
Plain English
A series of stages arranged one after another, where each stage takes what the previous stage produced and works on it again, building up a bigger total effect.
Context Anchor
Seen in turbine engine, compressor, and thrust reverser descriptions, especially when airflow is being directed through rows of vanes.
Derivation
From the Italian 'cascata,' meaning a waterfall, where water falls from one level to the next in a connected series of drops. The image carries directly into engineering: each stage hands its output down to the next, and the total effect is the sum of all the steps.
Why Pilots Care
Provides powerful deceleration after touchdown, shortening landing distance and improving safety on contaminated runways.
Analogy
A cascade works somewhat like a row of window blinds guiding light or air. The slats do not create the flow; they shape the direction the flow takes.
Intuition Check
Do not read cascade here as a waterfall. In this aviation context, it means a series of shaped vanes or blades that guide airflow.
Example Sentence 1
The thrust reverser uses a cascade of curved vanes to turn the engine's exhaust forward and slow the aircraft after landing.
Example Sentence 2
Maintenance found a dent in one cascade vane after an engine ingestion event.