Plain English Meaning

It is the way the cylinders are placed around the central shaft that turns the propeller. Different layouts produce different engine shapes — a circle, a straight line, a V, or two flat rows — and each has its own strengths.

Full Definition

The geometric layout in which the cylinders of a reciprocating aircraft engine are positioned around the crankshaft. Common arrangements include radial (cylinders arranged in a circle around a central crankshaft), in-line (cylinders in a single straight row), V-type (two rows set at an angle forming a V), opposed (two rows lying flat on either side of the crankshaft), and inverted (cylinders mounted below the crankshaft). The chosen arrangement determines the engine's overall shape, cooling characteristics, balance, and how it is installed in the airframe.

Context Anchor

Seen when learning the types of reciprocating in engine , , and descriptions.