What is the purpose of using a rubber wheeled roller when applying RAM?

The use of a rubber wheeled roller when applying radar-absorbing material (RAM) is primarily focused on the removal of air bubbles that may form during the application process. These air bubbles can create inconsistencies in the adhesive bond and potentially affect the performance of the RAM. By rolling over the surface with a rubber wheeled roller, you help ensure a closer contact between the RAM and the substrate, thus enhancing the overall adhesion and ensuring that the material performs as intended in maintaining low observability.

This process not only aids in achieving a smooth finish but also ensures that the RAM will completely adhere to the surface, preventing future issues related to peeling or air entrapment. Proper application techniques, like using a roller, are critical in the maintenance of low observable technologies in aircraft, promoting effective stealth capabilities.