Talk:Steam Engine/@comment-75.157.84.164-20120710174108/@comment-5274687-20120725225749

All engines create MJs (Minecraft joules), and a quarry needs about 200MJ to work at full speed. 1 Combustion engine makes 100MJ when using fuel, so two fuel-powered combustion engines are used for a quarry at full speed. Or you could use 10 steam engines at 20MJ each or 200 redstone engines at 1MJ each!