A Spanish startup has achieved a significant breakthrough in the field of space propulsion by successfully testing a new thruster that uses an environmentally friendly propellant, offering a safer and more economical alternative to the hazardous chemicals traditionally employed in the aerospace sector.
The innovation, developed by Arkadia Space, replaces the industry-standard hydrazine — a substance notorious for its extreme toxicity — with hydrogen peroxide, a compound far less harmful to both human health and the environment.
This pioneering technology was put to the test in early June during an in-orbit demonstration that marked a major milestone for the startup. Known internally as the DARK propulsion system, the thruster powered an ION spacecraft from aerospace company D-ORBIT as part of a controlled experiment. The demonstration involved thousands of precise, rapid-fire bursts lasting mere fractions of a second, alongside extended burns of five seconds or longer.
Impressively, the thruster was able to generate a consistent 5 newtons of thrust throughout these varied tests.
Reflecting on the results of the mission, Arkadia Space’s chief executive and co-founder, Francho Garcia, expressed his excitement and surprise over the system’s performance in orbit.
“What we have found is that it is exactly the same as the ground data,” Garcia said in a recent interview regarding the thruster’s performance beyond Earth’s atmosphere. “It was much better than what we were expecting, honestly.”
The success of this demonstration not only validated the viability of hydrogen peroxide as a propellant in space applications but also highlighted its significant economic advantages. The financial implications of adopting a greener fuel are considerable. During the mission, which launched aboard SpaceX’s Transporter-13 rideshare from Vandenberg Space Force Base, Arkadia was able to showcase the cost-effectiveness of their propellant.
According to a 2008 study conducted by Purdue School of Aeronautics and Astronautics, hydrogen peroxide is priced at approximately $10.36 per kilogram. In contrast, hydrazine — the conventional fuel — comes with a staggering cost of around $75.80 per kilogram.
Beyond its affordability, hydrogen peroxide offers a substantial safety advantage. Unlike hydrazine, which demands extensive safety measures including full-body hazmat suits and complex containment protocols, hydrogen peroxide can be handled with relatively simple protective gear, such as gloves and eye protection. This greatly reduces operational risks and costs associated with fueling and maintenance.
To underscore the dangers of hydrazine, former U.S. Air Force corporal and ground crew engineer Anthony Urankar shared a harrowing account from his military service with Good News Network’s Andrew Corbley. Urankar recounted a troubling incident involving a crashed F-16 fighter jet, which utilizes hydrazine for emergency burns in the event of an engine stall.
Following the crash, hazardous material (hazmat) teams were dispatched to manage the scene, and the response was so extensive that excavators were brought in to remove vast quantities of soil surrounding the crash site — far exceeding the immediate impact zone.
“All those who participated were then referred for cancer screenings, as hydrazine is considered a probable carcinogen,” Urankar revealed.
The toxic nature of hydrazine, coupled with its high cost and demanding handling requirements, has led to increasing pressure within the aerospace industry to transition toward safer alternatives. Garcia mentioned that several companies have indicated a growing need to adopt “green” propellants for their satellite missions. In some cases, operators face restrictions from launch providers.
Garcia also noted that companies have told him, “they need to run ‘green’ propellant-powered satellites, or SpaceX won’t include their craft onboard rideshare launches.”
The promise of this technology extends beyond satellites. Garcia revealed that Arkadia Space has received inquiries about scaling up their hydrogen peroxide-based propulsion systems for use in larger spacecraft, including vehicles designed for launch and atmospheric re-entry. This interest signals potential applications for the technology in a broader range of missions, from commercial spaceflight to planetary exploration.
Confident in the future of their innovation, Garcia shared his optimism about securing clients for Arkadia’s propulsion systems. “We believe that with the data that we have, we should have no problems signing the first customers,” Garcia said, according to Space News.
Arkadia Space’s accomplishment represents a meaningful step forward in making space missions safer, more sustainable, and more economically viable. As demand for cleaner propulsion solutions grows, technologies like the DARK system may soon become the new standard for responsible space exploration.
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