"Nexus" NASA 1960s super heavy rocket project

3D Model

[from Wiki:] The NEXUS reusable rocket was a concept design created in the 1960s. It was intended as the next leap beyond the Saturn V, carrying up to eight times more payload. Several versions were designed, including 12,000 and 24,000 short ton vehicles with payloads of one thousand and two thousand short tons respectively. The larger version had a diameter of 202 feet (61.5 metres). It was never built