You may have observed that many Twinkle Co dredges have cylindrical flotation, and most other dredges have rectangular flotation. The choice between rectangular and cylindrical flotation is simply a matter of inefficiency vs. efficiency. Flotation is nothing more than structure to locate components and displacement volume to support the weight of the dredge. Cylindrical flotation provides the best strength-to-weight ratio and is the most efficient shape to achieve the necessary volume.
