In its many years providing custom coils to a wide variety of customers, Rahn Industries has had the opportunity to participate in and contribute to the success of many projects. One of our most gratifying came to us this year when we were asked to build four custom coils needed for a prototype AC system project for the M-1 tank used in Afghanistan and Iran. A challenge with this research prototype was the restricted space allocated to the coil. Our engineering department worked closely with our customer to design, produce and deliver the coils.