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Message: <blockquote data-quote="Draco Malfoy" data-source="post: 28795344" data-attributes="member: 570250"> <ul> <li data-xf-list-type="ul">redundancy. [if few fails, still get enough trust. + can be on/off/dynamic throttle based on engine's condition changes while operation without affecting others]</li> <li data-xf-list-type="ul">can be used to make smaller or bigger rockets with different configurations (sell to other rocket manufacturers ) [Jeff Bezos's Blue Origin's BE-4 engines are already selling to ULA's Vulcan rocket - even though Blue Origin's New Glen rocket is not ready yet (BE-4 engines were designed for New Glenn rocket)]</li> <li data-xf-list-type="ul">faster engine swapping/ replacements [since they're targeting shortest reflight turnaround - possibly few hours]</li> <li data-xf-list-type="ul">number of engines needed can be changed based on the payload. [if customer want to send low mass stuff to a relatively low altitudes, they can reduce the engines & save the weight + fuel = low cost per kg charged from customer]</li> </ul>ULA's Vulcan rocket with Blue Origin's BE-4 engines<img src="https://www.spaceflightinsider.com/wp-content/uploads/2021/02/Header.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="width: 623px" /></blockquote>

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