The Department of Defense (DOD) is seeking proposals for creating a digital twin of the B-52H legacy aircraft system. The objective is to develop a faster and more cost-effective way to integrate new equipment at the system design/digital engineering level. The digital twin will include CAD models and SysML models and will be connectable to various models in different systems. The end goal is to have a digital engineering environment that is dynamically connected to an accredited simulation environment, enabling seamless integration of digital engineering models with other systems/products. The project will involve refining and improving the digital twin in Phase II, creating a well-defined deliverable prototype that can be used for commercialization. The prototype will simulate the integration of new equipment with the aircraft and undergo rigorous testing to ensure its accuracy and functionality. The success of the Phase II project will result in a well-defined deliverable prototype that provides a safer, more efficient, and cost-effective way to test and integrate new equipment with legacy aircraft. The Phase III effort will focus on developing and commercializing the digital twin technology for government and commercial applications, achieving a high technology readiness level (TRL). The expected TRL at Phase III entry is 9, indicating that the technology is fully developed, tested, and validated in relevant environments. The project team will work closely with potential customers and partners to identify their specific needs and develop a plan for commercialization. The digital twin technology has significant commercialization potential in the aerospace industry, with potential applications in aerospace companies, government agencies, and military organizations.