L3Harris Technologies has reached a notable milestone in the realm of propulsion innovation with the successful completion of self-funded testing of two advanced Rotating Detonation Engines (RDEs), marking a key advancement toward flight-ready systems.
The tests were conducted at Purdue University, with the first focusing on long-duration operations to validate the core physics determining the RDE’s optimal performance. The second involved a full-scale RDE and showcased its capability to function effectively across a broad flight range within a test stand environment.
“Completing two successful rotating detonation engine test series within a year underscores the strength and breadth of L3Harris’ propulsion portfolio,” stated Scott Alexander, President of Missile Propulsion at L3Harris. “We provide innovative propulsion solutions, from solid rocket motors and highly loaded grains to ramjets and next-generation advanced cycles, enhancing the capabilities of the U.S. and its allies by extending range, increasing speed, and delivering more mission-ready systems.”
Rotating Detonation Engines stand at the forefront of propulsion technology, enabling air-breathing missiles to achieve enhanced range and efficiency compared to conventional systems. These air-breathing propulsion systems are characterized by their high performance and cost-effectiveness, tailored to meet rigorous mission demands.
Significantly, key components of the RDE were produced using additive manufacturing, leading to reduced costs and shorter production timelines.
These advancements align with L3Harris’ long-term strategic vision of providing innovative, mission-critical technologies for the aerospace and defense sectors.
The progression of next-generation missile propulsion technology is overseen by the company’s Advanced Missile Propulsion Technology division.
“These tests have refined the requirements for broadening the operating envelope of future RDE-powered systems,” commented George Thum, Director of Advanced Missile Propulsion Technology. “This test series has delivered essential insights to ensure our systems are applicable in the near future, allowing us to provide next-generation propulsion capabilities to the warfighter.”
Over the past decade, L3Harris has dedicated substantial internal investments towards the development of RDE ramjet capabilities. Following this successful testing, the company is well-positioned to integrate RDE technology into upcoming flight systems, reaffirming its commitment to innovation and operational excellence.
Source: L3Harris (2026-05-20)
