Europe’s RLV C5: A Potential Starship Alternative Takes Shape

As SpaceX’s Starship continues its development, Europe is exploring independent options for heavy-lift launch capabilities. Researchers at the German Aerospace Center (DLR) have proposed the RLV C5, a reusable launch vehicle designed to offer a European alternative to Starship, addressing concerns about reliance on American technology and the operational control of SpaceX.

Analyzing Starship’s Capabilities

The RLV C5 concept stems from an analysis of Starship’s projected performance, based on publicly available data. SpaceX estimates that Starship, in reusable mode, could deliver approximately 66 US tons to orbit, with potential for up to 126 tons with full recovery of all rocket components . This analysis spurred the development of a European-centric heavy-lift vehicle with similar reusable properties.

RLV C5: Design and Features

The RLV C5 would utilize a fully reusable first-stage booster derived from the DLR’s SpaceLiner sub-orbital concept, coupled with an expendable upper stage . This design aims to maximize payload capacity, potentially reaching 77 US tons to orbit. The vehicle is envisioned as being significantly smaller than Starship, approximately one-third of its overall weight, and potentially more cost-effective.

A Novel Recovery System

Unlike Starship’s traditional rocket recovery method, the RLV C5 would employ wings to slow its descent to sub-orbital speeds. At the appropriate altitude and speed, it would then be captured by a large, subsonic aircraft . This approach is projected to allow the RLV C5 to carry up to 74% of its total mass into orbit, compared to Starship’s 40% payload mass.

Addressing Europe’s Space Independence

The development of a European launch vehicle is gaining importance as the United States focuses on its own space initiatives. The RLV C5 concept represents a step towards greater independence for European space endeavors, providing a means to launch heavy payloads without relying on American infrastructure or private companies .

Challenges and Future Outlook

While the RLV C5 design presents a promising alternative, it remains a concept on paper. Significant investment and years of development would be required to bring it to fruition. Starship, despite ongoing testing and occasional setbacks, is already undergoing flight tests. However, the RLV C5 could potentially fill a niche for payloads that are too large for existing European rockets but don’t require the full capacity of Starship.

Key Players

• SpaceX and Elon Musk: The primary driver of innovation in heavy-lift launch vehicles with Starship.
• German Aerospace Center (DLR): The lead researcher and proposer of the RLV C5 concept.
• European Space Agency (ESA): A potential partner in the development and implementation of the RLV C5.