Hi all, I've a few quick questions about solenoids, just want to understand things better. As I understand it, the way a solenoid works is the iron core is sucked into the middle of the coil because this is where the coil achieves the highest inductance possible. Makes sense. Incidentally, solenoids have a rather short throw, unless you use a very large coil. 2 questions: 1. I did a google search for neodymium solenoids and came up with nothing. I am guessing then that constructing an electromagnet with it's own permanent iron core, and then using a neodymium slug would not yield any more powerful results than a conventional solenoid would. Am I right? Why is this? 2. What are my options for creating a "long throw" solenoid? Obviously one option is using a very large coil. Another option as I see it would be to create a rod with permanent magnets placed at specific intervals, and use a series of "push-pull" electromagnets to propel the rod through them, similar in concept to a coil gun. I didn't want to muck up another electromagnetic thread I have going with all these related but unrelated solenoid questions so I created another thread here. Thanks!