Definition
The metal rods inside a reciprocating engine that link each piston to the crankshaft, transmitting the linear up-and-down motion of the piston into the rotational motion of the crankshaft.
Plain English
Strong metal arms that connect the pistons to the spinning shaft below them, so when the pistons move up and down, they make the shaft turn.
Context Anchor
Seen in descriptions of how a piston engine changes fuel-burning pressure into the turning force that drives the propeller.
Derivation
From 'connect' (to join together) plus 'rod' (a straight bar). The name describes exactly what the part does: a rod that connects two things — the piston and the crankshaft.
Why Pilots Care
A failed connecting rod can destroy an engine in seconds, so their condition directly affects flight safety and reliability.
Intuition Check
Connecting rods are not just any rods that connect two parts. In this engine context, they specifically connect pistons to the crankshaft and carry the force that makes the engine turn.
Example Sentence 1
The connecting rods transfer the force from the pistons down to the crankshaft, where it becomes the rotation that turns the propeller.
Example Sentence 2
Oil analysis can reveal metal particles from worn connecting rods before they cause engine failure.