| With the AC3, the Traxx sidewalls were ribbed again, result of a more simple construction method. Bombardier also presented the Flex-Panel; Made of flexible canvas, installed like a curtain, this was an idea borrowed from the truck and trailer market. For customers that don't liked ribbs, the flex -panel covered them, but more important, it could offer a more cheaper way to customize the design of their locomotive (Railcolor.net) |