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>The Northstar engine is a simplified but more powerful version of the BE-4 engine, Limp said. It has half the number of parts, 30 percent less mass, and about 65 percent can be 3D-printed. >Blue Origin believes it can manufacture the engine at 25 percent of the cost of a BE-4 engine, and eventually reach the point where each engine can be assembled in less than a day. The company is deep into development and testing of Northstar, having already begun a test-firing campaign. This is how we do it. Rev up, cost down. Meanwhile, a thousand Craptors built and they're still failing in flight on first use.⏱ 31m↩