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Virgin decided to move on to the Delta-class program after completing 12 flights to the edge of space—above 80 km or 50 miles, as defined by the US government—with the previous-generation VSS Unity rocket plane.—Stephen Clark, ArsTechnica, 1 May 2026 Ambitious short film chronicles daring flight of X-15 rocket plane test pilot (video)
Going to SXSW 2025?—Jeff Spry, Space.com, 8 Mar. 2025 These lower operating expenses are tied to Virgin Galactic's decision to suspend operations of its VSS Unity suborbital rocket plane last year to focus investment into a new series of suborbital spacecraft known as Delta-class ships.—Stephen Clark, Ars Technica, 28 Feb. 2025 Even after digital computers arrived, analog computers remained popular into the 1970s, especially for simulations (they were used to drive flight simulators for the X-15 [pdf] rocket plane and early spacecraft).—Stephen Cass, IEEE Spectrum, 25 Mar. 2015 See All Example Sentences for rocket plane