Stratolaunch Systems conducted its first hypersonic test flight with its Talon-A2 vehicle and Roc carrier plane in December, then repeated the feat in March.

Stratolaunch's Talon-A2 prototype goes hypersonic after dropping from world's largest airplane (photos)

Source: space
Source Link: https://www.space.com/technology/stratolaunchs-talon-a2-prototype-goes-hypersonic-after-dropping-from-worlds-largest-airplane-photos