Windows;6.1.2(MC1.7.10) VR Minecraft VR Joule(J。、。 and needs the use of other mods machines. MJ can …MOD"Minecraft"(Minecraft Joule【 ...Minecraft Joules (MJ) are a type of energy unit introduced in BuildCraft. It is used to power BuildCraft machines as well as those from other mods (including Forestry and Railcraft). MJ are typically produced (as it is in BuildCraft and Railcraft) with Engines. Each Engine will produce a different amount of MJ and will require any variety of fuel and cooling sources if …MJ is the energy that BuildCraft 3 uses. MJ stands for Minecraft Joules. It is generated by any kind of Engine and can be used by any kind of BuildCraft machinery. Many types of energy can be converted to MJ by using Engines,