By far the largest aircraft built by an Atlantic Seaboard city-state, and notable for being the largest biplane ever, even larger than the ancient SSW R.VIII, The Colossus was an one-off that not only was built as a vanity project by the Twin Cities to reach above and beyond to the USS major base in Boston. Designed with the intention of attacking the USS' most dangerous assets in the form of it's pre-Crumbling fleet, this aircraft is fitted with a 90 mm cannon.

Only one was orginally built and proved effective enough that, after the sinking of a pre-Crumbling destroyer (made possible in no small part due to the degradation of it's AAA suite for want of spare parts), it's serial production was stopped by what was to be among the very last USS airstrikes carried out with jet aircraft. While the plans were leaked, only a couple more were built as pure bombers by other City-Statees.