Venus Aerospace secures $91 million for its detonation engine.

      A startup from Texas has successfully secured $91 million to develop a rocket engine that many in the industry previously deemed too challenging. Venus Aerospace has announced a $91 million Series B funding round to advance its Rotating Detonation Rocket Engine (RDRE), with Mercury Fund leading the investment.

      The list of investors resembles a defense industry lineup, including Lockheed Martin Ventures, MESH, PEAK6, Draper Associates, Starboard Star Venture Capital, Green Sands Equity, among others. This funding will support testing and the design of vehicles tailored for specific clients. Although it represents only a small portion of the investment seen in Europe’s space enterprises, it is still significant.

      A novel approach to rocketry

      Traditionally, most rockets combust fuel in a cylindrical chamber. In contrast, the RDRE generates a continuous supersonic combustion wave that circulates around a ring. This design theoretically utilizes propellant more efficiently. However, the underlying physics have proven to be quite challenging, leading to many years of stagnation for the concept.

      Advancements in 3D printing and simulation technology have changed the landscape. The first successful test occurred in 2020 at the University of Central Florida, followed by a ground demonstration by NASA in 2022, and Japan’s JAXA conducting a space test in 2021. A significant milestone was achieved last May when Venus's RDRE became the first to successfully launch a rocket into flight.

      Shifting focus from passenger transportation to defense

      Initially, Venus had a more aspirational goal. Founders Sassie and Andrew Duggleby, a married couple, established the company in 2020 with the vision of creating environmentally friendly hypersonic jets for passengers. The success of the May flight transformed their business direction. “The world looked at us and said, ‘Oh my gosh, you have a working RDRE, would you sell us one?’” stated CEO Sassie Duggleby in an interview with TechCrunch.

      The company is now pivoting toward defense applications. Its aim is to substitute the solid motors used in many missiles with its own thruster, as well as to develop high-speed space vehicles for military use. Chief Technology Officer Andrew Duggleby noted that the engine “integrates efficiency, throttling, reusability, and manufacturability in a way that meets customer demands for real defense and space missions.”

      Significance of this development

      The primary challenge now is achieving endurance. Throughout 600 tests, Venus has managed to ignite its engine for a maximum of 32 seconds. Customers will require performance ranging from six to 15 minutes. A grant from the Texas Space Commission is funding the construction of a larger test stand to address this requirement. If successful, this 70-year-old concept could finally be materialized as a viable product, allowing a small startup to become a key player in the defense technology sector.