Kratos Firejet Drone System Gains J85 Engine Integration for Enhanced Performance — Kratos Defense & Security Solutions, Inc.

Event summary

Kratos completed initial flight tests of the Mk1 Firejet drone system powered by its J85 engine on April 21, 2026.
The new configuration offers improved range, endurance, speed, and climb rate compared to the Classic Firejet model.
Production of Kratos Spartan engines, including the J85, is ramping up with thousands expected by late 2026 and tens of thousands over the next few years.
The Mk1 Firejet is positioned as a first-to-market tactical jet UAS in the high-performance, sub-$500,000 price range.

The big picture

Kratos' integration of its J85 engine into the Firejet drone system aligns with broader defense industry trends toward affordable, high-performance unmanned aerial systems. The move underscores Kratos' strategy of reducing supply chain risks by sourcing American-made components while meeting the U.S. Department of Defense's call for rapid delivery of cost-effective military capabilities.

What we're watching

Production Scaling: Whether Kratos can sustain the rapid production ramp-up of J85 engines to meet growing demand.
Market Differentiation: How the Mk1 Firejet's performance and affordability will position it against competitors in the tactical UAS market.
Customer Adoption: The pace at which allied nations, including Taiwan, adopt the Mk1 Firejet for both target and tactical applications.