# Blue Origin Reused the Booster. Not the Engines. - Date: 2026-04-16 - Category: Space & Aerospace Blue Origin hot-fired its first reflown New Glenn booster Thursday, becoming the second company after SpaceX to reflown an orbital booster. But all seven BE-4 engines were replaced. The booster flew again; the engines did not. That matters for launch costs, NASA scheduling, and whether Blue Origi... ---