In a quest to create power, you have discovered a way to produce a small amount of power using just a redstone signal.
The Redstone engine is a basic engine that only requires a redstone signal to run. It only produces a tiny amount of power.
Due to the little amount of MJ they produce, they are only suitable to operate simple devices such as extraction pipes or pumps.
BuildCraft engines have 5 temperature stages, which determines the speed the engine runs at: Blue, Green, Yellow, Red and Black.
Unlike more powerful engines when activated, Redstone Engines cannot overheat and turn black when the power has nowhere to go and it will keep running.
Engines will always connect to the nearest compatible MJ consumer but Redstone engines will not connect to kinesis pipes and will only connect to certain machines.
You can use a Wrench to rotate it to change which block it is powering.
As with all engines, it requires a redstone signal to run.
Gates can be used to detect the engines temperature stages to help you control them.