Engines

Engines are the "rings" of Steambirds Alliance. They allow you to buff one of a couple of different stats: armor repair rate, steam recharge rate, gun damage, and max speed. Choose wisely!

Damage Modifier
Boosts from these engines increase Damage modifier, the multiplier applied to base item damage to determine actual damage. These boosts stack additively with those from Upgrades, Pilot Skills, Planes and their leveling bonuses, and certain other equipped items.

Super Speed
Boosts from these engines increase Super Speed, the speed at which the plane moves while engaging afterburners (for default keyboard and mouse setups, W engages the afterburner on single-stick Planes such as the Old Faithful while Right Mouse Button engages the afterburner on twin-stick Planes such as the Quad).