The engines are what enable your ship to fly around the galaxy causing and solving all manner of problems. The engine sets itself apart from the other systems by being four times as large as all other systems.
When powered the engines allow the Captain to move the ship into more advantageous positions during the battle. While powered the engines also provide a chance to dodge incoming torpedoes.
The more power provided to the engines, the faster the ship moves. Similarly more power increases the dodge chance for torpedoes.
The engine also has three operating modes: Safe, normal and overcharge
Reduces the amount of durability damage done to the engines while powered and reduces the efficiency of the engines.
Normal durability damage and efficiency.
Does extra durability damage to the engines at the benefit of increasing engine efficiency.