Hermann Noordung (the pseudonym for Captain Potocnik of the Austrian Imperial Army) published Das Problem der Befahrung des Weltraums (The Problem of Space Flight), which included one of the first serious attempts to put on paper the design of a manned space station. Noordung's proposed design consisted of a doughnut-shaped structure for living quarters, a power generating station attached to one end of the central hub, and an astronomical observation station. He was among the first to suggest a wheel-shaped design for a space station to produce artificial gravity, and also argued the scientific value of such a station in a synchronous orbit above the Earth.

Further improvements to the Valier-Oberth gun were suggested by Willy Ley and Baron Guido von Pirquet of Vienna. To achieve the necessary muzzle velocity, it would be necessary to construct the gun with angled lateral chambers. These design concepts would be put to military use in the V-3 Hochdruckpumpe cannon of World War II.

Writing in the monthly journal Die Rakete, Baron Guido von Pirquet presented broad arguments in favor of the scientific possibility of manned space travel and the velocities required for orbital and interplanetary flight, of which orbital speed was by far the more difficult to attain. Von Pirquet suggested several different space stations for diverse functions: one in a near-Earth orbit as primarily an observation site and another station in a much higher orbit that would be more suitable as an orbital refueling station for escape vehicles.