Stewart Amos Galaxy Today, Stewart-Amos manufactures a full line of regenerative air and a mechanical broom sweepers for the construction, industrial and municipal markets. The Stewart-Amos Sweeper is designed to be an easy-to-use and maintain design. One feature that makes our system stand out is the use of a dual engine design for all their models, although single engine designs are available as well. The two engine design allows the flexibility to mount the system on almost any chassis. This design allows us to offer this in almost any country and be able to utilize a local chassis for the sweeper.