Definition
In the context of aircraft ignition systems, RIGHT refers to the right magneto — one of the two independent magnetos that supply electrical current to one set of spark plugs in each cylinder. The ignition switch position labeled R isolates the engine to run on the right magneto only, typically used during the magneto check on runup.
Plain English
The right-hand one of the two magnetos that fire the spark plugs. When the ignition switch is set to R, only that magneto is firing the engine.
Context Anchor
Seen on ignition switches and during the engine run-up when checking LEFT, RIGHT, and BOTH ignition operation.
Derivation
Right comes from an old word meaning the right-hand side. In this ignition-system use, it means the right-side magneto, not “correct.”
Why Pilots Care
Verifies proper operation of the right magneto to confirm ignition system redundancy before flight.
Intuition Check
Do not read RIGHT as “correct” here. In this context, RIGHT means the right-side magneto or the ignition-switch position that selects it.
Example Sentence 1
During runup, the pilot moved the ignition switch from BOTH to RIGHT and noted a 75 RPM drop, well within the allowable limit.
Example Sentence 2
A smooth RPM drop confirms both the LEFT and RIGHT magnetos are functioning correctly.