By 
July 8th, 2026
Image credit: Venus Aerospace
Progress has been reported on developing a high-thrust rotating detonation rocket engine, or RDRE in space shorthand.
Venus Aerospace today announced the close of a $91 million Series B financing deal.
This round of funding enables Venus to scale up RDRE development and production, moving the propulsion system from successful flight demonstration, the company states, toward deployment for a range of near-term defense and space applications.
Detonation wave
Headquartered in Houston, Texas, Venus Aerospace points out that, unlike conventional rocket engines, which burn fuel through subsonic combustion, the firm’s RDRE employs a continuous supersonic detonation wave that rotates around the combustion chamber.
“The result is the most efficient rocket engine architecture ever flown, by a margin of 15 percent,” the company explains. “This efficiency gain can translate into extended range, increased payload flexibility, and more capable systems across defense and space missions where performance margins are critical.”
Ultimately, the RDRE is aimed at enabling vehicles to travel four to six times the speed of sound from a conventional runway.
First test flight last year of rotating detonation rocket engine.
Image credit: Venus Aerospace
First flight test
Venus Aerospace conducted the world’s first flight test of a high-thrust rotating detonation engine in May 2025, carried out at Spaceport America in New Mexico. That milestone was met in just over four years on $80 million in capital.
The new round of cash can mature the flight-proven high-thrust RDRE into full propulsion systems.
The effort to raise the $91 million infusion was led by Mercury Fund, a Houston-based venture capital firm, with participation from Lockheed Martin Ventures, MESH, PEAK6, Draper Associates, Starboard Star Venture Capital, Green Sands Equity, Seraph Group, Trousdale Ventures, along with other new and existing strategic and institutional investors.
For more information on Venus Aerospace, go to:
Also, go to this flight test video at:
Posted in Space News
