An overview of the critical engine discussing what the critical engine is, which engine is the critical engine, and the reasons why it is the critical engine.
1. WHAT IS THE CRITICAL ENGINE?
The critical engine is the engine that if failed will have the most adverse affect on the CONTROL and PERFORMANCE of the aircraft.
2. WHICH ENGINE IS THE CRITICAL ENGINE?
In a conventional twin (clockwise prop rotation), the LEFT ENGINE is the critical engine.
In a counter rotating twin, there is no critical engine.
3. WHY IS THE LEFT ENGINE CRITICAL?
There are 4 reasons the left engine is the critical engine (REMEMBER - PAST):