You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!
The inverters the feed the motors can be programmed to use a large variety of frequencies. They could even play melodies while driving the traction unit. Ttc subway does it too, just hits different notes.