A scaled lunar cargo crane developed by Romania’s COMOTI and Initium Space has completed laboratory testing at the European Space Agency’s Planetary Robotics Laboratory in the Netherlands. ESA described the Loader demonstrator on October 22, 2026, as a step toward unloading heavy equipment from lunar landers.
The model lifted 30 kilograms under Earth gravity. ESA described that weight as equivalent to a little over 180 kilograms under lunar gravity. This was a ground test of a scaled mechanism, not a demonstration of lifting a tonne on the Moon.
The planned full-size crane would be more than twice as large, with a target lunar lifting capacity of 1,000 kilograms and a reach of 6 meters. Its proposed arrangement folds onto a lander’s payload deck for launch, then unfolds after landing.
A leveling mechanism keeps the crane upright if the lander rests on a slope. The arm has two joints and grippers for securing and positioning cargo. A spring-loaded passive gripper can lock without power, and a battery-powered gripper can rotate the load. Cable management and the deployment sequence allow the mechanism to remain compact when stowed.
The development addresses a specific part of lunar delivery: transferring cargo from the spacecraft to its operating location. A successful landing leaves equipment on the lander. Rovers, instruments, and infrastructure may then need to reach the surrounding surface, sometimes several meters away.
ESA’s Argonaut program provides the relevant scale of future cargo operations. Its landers are designed to deliver up to 1,500 kilograms of mission-specific cargo. The agency plans launches on the four-booster Ariane 6 beginning in 2030, supporting robotic missions and supplies for human exploration.
Argonaut’s architecture separates the Lunar Descent Element, which transports and lands the payload, from the mission-specific Passenger. A cargo-handling mechanism must fit the delivered equipment and its deployment requirements. Loader’s reach would allow placement away from the lander, including locations needed for instruments whose measurements could be affected by nearby hardware.
New Space Economy’s overview of lunar cargo services distinguishes transport offerings across the Earth-to-Moon delivery chain. Loader concerns the final surface-handling task, after the landing vehicle has completed its descent.
ESA’s Technology Development Element supports the crane project. The completed work establishes the demonstrator’s mechanical functionality and positioning tests; the next development concerns refinement and scaling of the full-size system.
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