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Phase 2 EELV - An Old Configuration Option with New Relevance to Future Heavy Lift Cargo

机译：阶段2 eelv - 旧配置选项，与未来重型货物的新相关联

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In 2004, the Atlas program of Lockheed Martin created a vision for performance evolution of the Atlas V family focused on NASA growth missions, with performance options ranging up to 140t. The 5m diameter, 70t class Phase 2 Atlas Heavy, assuming dual RD-180s, was a key vehicle in this evolution. With Constellation, this configuration was put on the back burner, but there is now renewed interest with Augustine Commission identifying this vehicle on its short list of candidate Heavy Lift Launch Vehicles (HLLVs). With a dearth of publicly available data on this vehicle concept, this paper summarizes this configuration and its merits. The creation of United Launch Alliance has created important synergies with the availability of 5m tank hardware and production facilities from Delta IV, allowing ULA to incorporate the best of Atlas and Delta. The Phase 2 design leverages existing assets, including the Delta IV factory and the Atlas V launch pad, makes this a true EELV evolution. Newer upper stages alternatives now conceptually exist that might leverage NASA developments from the Constellation program to further enhance the Phase II EELV concept.
机译：2004年，Lockheed Martin的阿特拉斯计划为Atlas V系列的绩效演变创造了一个专注于美国宇航局增长特派团的绩效演变，性能选择范围高达140吨。假设双RD-180S的5米直径，70T级阶段2Atlas重，是这种进化中的关键车辆。通过星座，这种配置被放在后燃烧器上，但现在对奥古斯丁委员会的兴趣识别在其简短的候选重型推动车辆（HLLV）上识别这辆车。本文借助了对该车辆概念的公开可用数据，总结了这种配置及其优点。联合发射联盟的创建创造了具有5米坦克硬件和来自Delta IV的生产设施的重要协同作用，使ULA融入了最佳的地图集和三角洲。第2阶段设计利用现有资产，包括Delta IV工厂和Atlas V发射垫，使其成为真正的eELV演变。现在较新的上阶段替代方案概念性地存在，这可能利用星座计划的发展，以进一步增强II阶段eELV概念。

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