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Advanced / Transformational Technology

Radical Begins Flight Testing UAS Planned For Stratospheric Operations

By Cal Biesecker

Wednesday, October 29th, 2025

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Radical Begins Flight Testing UAS Planned For Stratospheric Operations

First flight of Radical's Evenstar stratospheric unmanned aircraft system: Photo: Radical

Evenstar, an unmanned aerial system (UAS) prototype developed by Radical, completed its first flight-test earlier this fall, validating the company’s design and build process for the aircraft. The initial low-altitude flight testing will clear the way for Evenstar to begin its stratospheric campaign in 2026, the Seattle-based startup said on Wednesday. The stratosphere extends from about 12 miles to 31 miles above Earth. Evenstar has a 33-pound payload capacity and can be used for intelligence, surveillance and reconnaissance, weather forecasting,…

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