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[i]The ROSA array (Roll-Out Solar Array) is similar in design to the Hubble solar array. It possesses a flexible blanket that is rolled on a drum for stowage and is supported by two STEM booms running along the blanket edges. The booms are rolled on the same drum and deployed in parallel with the blanket. In contrast to Hubble, a tip-deployment is applied instead of the root deployment. Thereby the drum can also be used as a spreader bar to stretch the blanket and connect both booms. The energy for the deployment process is provided by the strain energy stored in the two carbon fiber STEM booms. Therefore no additional motor is required except for deployment control reasons. The overall design of ROSA is strongly focused on simplicity.[/i]
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