Originally Posted by 77blue
Thanks zimmej51 - I don't believe I have ever heard of, or at least recognized the "W" configuration. Even searching for it after I read your post I didn't find much - lots on the "Z" but short on C2/C3 specific info.
Yep, not much out there. It's not commonly used. I actually don't remember where I first learned of it, but I think it had to do with some accessory drives on aircraft. Decades ago I worked for an avionics company that did a lot of contract work for all kinds of aviation stuff.