Hello All, My name is Nik. I am very glad I found this forum. For the past couple months i have been researching (YES, I do use the search function) information on electromagnets. I have done a lot of reading on wiki so I am familiar with its E.M. page. I am building an electromagnet. Like others I am curious and have questions/concerns. I am trying not to repost old questions but some answers just didnt do me justice. I am trying to build an E.M. to spec. The only goal I have is it needs to lift 500 - 1000 lbs. My power source will either be 12v car batteries, or eventually LiPo / LiIon batteries. I will run them in series to maximize battery life. The only constraints I have are the size and height of the iron core. It can have a diameter no larger than 4 - 5", and a height no larger than 4" The problem I am having is what wire to choose. I know that a copper magnet wire has a resistance, and so do the batteries. I know it can only let through so much current. Are there any exmaples of E.M.'s I can actually learn from? I am tired of searching and finding the same, grade 2 level, iron nail and wire with a tiny battery. I understand the theory but now i need some variables to plug in. so to sum this up: - What gauge wire (I know if you add length you add R, add area and you reduce the R) - what will it take for a power supply Also, Where is the EMF the strongest? is it along the sides? or at the base? any help is appreciated. Some of you can understand when you're passionate about learning something you spend many nights awake. Thank-you very much. Helping me would reduce the amount of years the stress is taking from my life haha.