Benchmark's Macaw Thruster Achieves 10-Minute Burn in Propulsion Breakthrough

Benchmark Space Systems has successfully tested its new Macaw thruster in a major milestone for spacecraft propulsion. The device, powered by the advanced ASCENT fuel, completed a full 10-minute continuous burn without failure. This achievement signals progress for larger satellites and more efficient orbital manoeuvres. The test took place at Edwards Air Force Base in California as part of a wider campaign with the U.S. Air Force Research Laboratory (AFRL). ASCENT, a high-performance monopropellant, was developed by AFRL to replace traditional hydrazine. It offers 50% greater impulse density, meaning spacecraft can achieve the same speed changes with less fuel, mass, and cost.

The 22-Newton Macaw thruster was designed specifically for larger satellites and demanding orbital transfers. After the 10-minute burn, it remained fully operational, hinting at a longer lifespan for future missions. Benchmark secured a $4.9 million AFRL contract earlier this year to advance ASCENT-based propulsion systems.

Talks with government and commercial customers about additional missions are now underway. The company is also preparing to qualify the Macaw thruster for real-world on-orbit demonstrations. The successful test confirms the Macaw thruster’s endurance and efficiency. With ASCENT’s improved performance, spacecraft could carry lighter, cheaper propulsion systems while maintaining capability. Benchmark’s next steps include certification for operational use in upcoming missions.