The field of aviation training devices and simulators is an ever evolving and interesting area. As expenses increase in so many sectors of the rotorcraft industry, devices (which don’t move) and simulators (capable of motion) help contain training and certification costs. [NOTE: In this article, the terms “sim” and “simulation” are used at times to collectively refer to both types of trainers.] Sims can create flight scenarios that are too dangerous to duplicate in actual aircraft, and make practicing other procedures safer. For example, more fatal training accidents occur practicing autorotations than any other skill. Simulation for such scenarios can save lives.