what we have to work with is a portable generator ~240vac ~3500watts then to a step up transformer so output ~540vac. then a full wave bridge rectifier to make the DC thought is we have a semi truck rim (will get the diameter/size soon) (due to this will get slammed around and banged into other scrap yard items) with a ~3.5"solid core axle welded into the center. we have access to unlimited amount of thhn* wire of pretty much any awg (solid or stranded) to use in this project we would like to create a scrap yard size electromagnet extra equipment can be implemented in this project suggested. (bigger than a rim if needed) questions are: 1) best way to place the windings or just wrap the center pole? 2) best size wire to use for the windings to make enough induction resistance so the generator will last a lil while will post pictures and more pictures and more pictures of the build and progress and end results so everyone can see how it works when completed so others can build one if they would like or use as a reference for their own projects.