The Strategic Importance of Satellite Propulsion
As space becomes an increasingly congested domain, satellite propulsion technology becomes more important than ever for national defense.
Historically, satellite propulsion was designed primarily for orbital insertion and station-keeping. Today’s satellite demand far more. They must rapidly adjust orbits, avoid threats or debris, support dynamic mission requirements, and be ready to launch at a moment’s notice. Advanced propulsion systems enable tactical advantages, allowing defense operators to respond in real time to evolving conditions in space.
Moog propulsion technologies are helping redefine how we deploy and safeguard satellites, delivering greater agility, resilience, and mission longevity across modern space architectures.
The driving force behind satellite propulsion innovation
The defense industry has satellite needs that have never existed before. The criticality of satellite survivability in the ever-congested space domain means that operators need unprecedented maneuverability to reposition, sustain, and protect space assets.
“Defense operators need high-performance satellites with unrivaled agility that can be delivered in the fastest timelines the industry has ever seen,” said Dr. Shae Williams, Moog Staff Project Engineer.
With satellites responsible for the eyes in the sky equipping those who defend freedom across all domains, the time is now for exponential innovation in the satellite industry.
“Propulsion is what allows satellite operators to perform their missions as they were designed,” said Williams. “Those mission requirements are more important than ever to national security.”
The viability of alternative propellants
Traditional chemical propellants like hydrazine have been the industry standard for satellite propulsion since the inception of spaceflight because they are extremely reliable and offer exception performance. Propulsion innovation today is focused around alternative propellants that are more available, affordable, and less-toxic and easy to handle. This in turn allows for responsive fueling and launching of satellites by cutting the time needed to load and prepare a propulsion system to hours instead of days or weeks.
Dr. Shae Williams is responsible for Moog’s internal research and development on next-generation propellants and products to ensure Moog, which has been a leader in propulsion since the 1940s, continues to stay at the forefront of innovation in this market.
The challenge for propulsion innovation is that there is a reliance on exotic materials and a small number of highly capable test facilities, which means it is harder for propulsion technology innovations than it is for something like software or circuit development. All of this technology outside of propulsion is moving quickly, and we have to keep up.
“We have been working on new propellant technologies as they arise. Right now, we are in testing and qualification on several new products, using new propellants and also more proven ones,” said Williams.
These innovations are in development with government partners. The technology is in the qualification phase and hold promise to become viable mainstream operations within a few years.
Scaling up and increasing capacity
Advancing propulsion fuel options and hardware for the defense market isn’t just about expanding the technology, it is about increasing manufacturing capabilities. Previously, spacecraft production meant large, exquisite satellites with long development timelines. With today’s proliferated architecture, hundreds and thousands of satellites are launching into orbit at a rapid pace. Moog is adopting a new production factory model to increase our manufacturing to meet these rapid timelines.
Moog is increasing its Niagara Falls propulsion facility clean room capacity by 80% and will allow for more robust multi-shift operations. The facility supports monopropellant, bipropellant, green, and multimode propulsion solutions for satellites, launch vehicles, and missiles. The increased capacity will enable more efficient production and shortened lead times for key technologies, including Moog’s MONARC monopropellant engine line, propulsion systems, and classified projects, which will each have dedicated production cells. Construction is on schedule to be completed by summer 2026. This milestone will further strengthen the unique capabilities of the Moog Niagara Falls site, which is one of the few facilities in the United States equipped with four, in-house high-altitude hot fire test chambers.
To support this growth, the Niagara Falls team has added dozens of new roles in Operations and Engineering, reinforcing Moog’s commitment to innovation and operational excellence.
Enhancing Maneuverability and Survivability
In a contested space environment, predictability is a vulnerability. Advanced propulsion allows satellites to alter trajectories, reposition within or across orbital regimes, and complicate adversary tracking efforts. Increased maneuverability also enables rapid response to emerging threats or mission updates, which is a critical capability for modern defense operations.
Shaping the Future of Defense in Space
As defense operations continue to expand beyond Earth’s atmosphere, propulsion will remain a cornerstone of space superiority. By enabling satellites to move smarter, last longer, and respond faster, Moog propulsion technologies are not just supporting defense missions, they are shaping the future of defense capabilities in space.
