Dave5

Stratolaunch yesterday completed the captive carry flight with the first powered Talon-A hypersonic vehicle, or TA-1, over Southern California. This was the twelfth flight for the Roc launch platform and saw the Talon-A filled with live liquid oxygen (LOx) fuel for its rocket engine. The flight lasted three hours and 22 minutes. It was, according to Stratolaunch, “a significant step forward in the company’s near-term goal of completing a powered flight with the Talon-A vehicle.”

https://www.thedrive.com/the-war-zone/worlds-largest-plane-one-step-closer-to-launching-hypersonic-vehicle