Orbex secures patent for 'petal fold' reusable rocket technology

This technology is particularly advantageous for micro-launcher rockets such as Orbex's Prime rocket. It facilitates the recovery of the launch vehicle by adapting existing structural components, thereby adding minimal weight. As a result, it permits reusability with a negligible impact on overall performance and without contributing additional propulsion emissions into the upper atmosphere during re-entry, distinguishing it from other reusable launch systems that rely on powered descents to decelerate during re-entry and landing.

The Prime rocket, designed by Orbex, will feature a two-stage mechanism. The REFLIGHT system repurposes the interstage structure that lies between the two stages. Once Stage 1 separates from Stage 2, the interstage atop Stage 1 transforms into four 'petals' that unfold to create drag. This passive mechanism reorients and decelerates the descending spent rocket stage, facilitating a controlled return to Earth. This descent is further aided by a lightweight parachute, ensuring Stage 1 achieves a soft landing at sea.

Following recovery, Orbex plans to transport the retrieved Stage 1 back to its manufacturing facility in Forres for refurbishment or recycling. This process ensures no debris remains in orbit, on land, or in the sea, fostering a 'circular rocket economy'.

Jonas Bjarnø, CTO at Orbex, said: “At each step in the construction of Prime, we are looking at how to improve the launch system efficiency and sustainability. Our REFLIGHT technology is a critical innovation in overall efficiency of the system, and the slower return to Earth reduces risk of significant aerothermal damage, enabling refurbishment and re-use of parts. This is really critical to our vision for a more sustainable, circular rocket economy.”

This announcement follows closely on the heels of Orbex securing a patent for its coaxial tanking technology in over a dozen countries.