The Stirling Engine must be fueled with Saplings, Coal, Wood, or a Lava Bucket and it must be activated with a Redstone signal. It can be used to power a variety of machines such as the Mining Well. It can be connected to other Stirling Engines to add power, or can be connected to a Kinesis Pipe to transport that power elsewhere.
Power
The Stirling Engine provides 10 RF/t. The following items are burnable and last for specific amounts of time before being consumed:
Material
Burn Time
Lava bucket
20 min 40 sec
Coal, Charcoal
1 min 20 sec
Wood, Wood Planks
15 sec
Saplings, Sticks
5 sec
The smaller colored side of the Stirling Engine is the side which is providing power. The orientation of the engine can be changed using a Wrench. A Stirling Engine will not overheat unless it is not powering anything and it builds up 10,000 RF (1000 C heat) internally. Click the engine with a Wrench to re-enable the engine after overheating.
Since BuildCraft 6.2, engines now overheat and no longer explode at a high temperature