OTV in LLO w/ LOS and LMs

May I be so bold as to redirect you here, and an absorbing read on Atomic Rockets?

Image credit: Convair
Image source: SDASM Archives

S-64-22571

Image credit: NASA
Image source: NM Space Museum

Skylab Boost Mission

Image credit: NASA Marshall
Image source: NASA Images

Gemini-Agena

Image credit: NASA
Image source: SDASM Archives

Gemini/Agena

Image credit: NASA
Image source: Mike Acs

S-83-28321

S83-28321 (14 March 1983) — In this artist’s concept of future lunar operations, a lunar ferry is about to burn out of lunar orbit for the trip back to facilities in low Earth orbit. The ferry vehicle carries tank modules filled with liquid oxygen, which has been produced from mining operations on the surface of the Moon. One possibility for such operations would be to have manned facilities in low lunar orbit, such as illustrated here. At the upper right side of the photo is a small orbiting manned station. At the lower right side of the photo is a liquid oxygen propellant dump, to which a lunar landing vehicle carrying liquid oxygen is about to dock. The lunar ferry vehicle itself is representative of one type of aerobraking system. The balloon-like torus around the center of the ferry-craft would inflate to several times its illustrated size and, once the vehicle has swooped down close to the Earth’s outer atmosphere on the return journey, would use atmospheric drag to slow the craft and place itself in low Earth orbit. The liquid oxygen would then be used in operations there for fueling various vehicles, including an orbital transfer vehicle for trips to geosynchronous Earth orbit. This concept is part of a study done for the Johnson Space Center by Eagle Engineering of Houston. The artist was Pat Rawlings.

Image credit: Eagle Engineering
Image source: Internet Archive