RotaryCraft is an industrial-style mod, akin to the likes of BuildCraft, IndustrialCraft, and so on. Its name refers to the engines added by the mod generating rotational power, which is the product between the torque and the speed. Rotational Power is transfered by Shafts, Gearboxes, etc. to reach the machines. The main focus of the mod is realism, using real machine specification for power generation/consumption. Also real world laws of physics are implemented for things such as heat dissipation. It adds absolutely no worldgen.