The Wimmer tunnel excavator series consisting of Blue Badger, eBadger and miniBadger was specially designed for smaller tunnel cross-sections. For all applications for which the Blue Badger is too small, there will be another tunnel boring machine in the future: the Yellow Fox.
The Yellow Fox can be used for working heights from 4.2 m. The basis for the Yellow Fox is a Liebherr platform that is specially made for Wimmer. This is not a standard platform, but a special version: a Liebherr 914 Compact Litronic superstructure with a Liebherr 920 Compact Litronic undercarriage. As with the Badger family, the excavator boom is custom-made by Wimmer.