Related: 5 Habits That Made Elon Musk an Innovator Two years ago, Elon Musk gave Jay Leno a tour of the SpaceX factory surrounded by 10.2-foot-tall rocket engines called Raptors standing like ...

Roughly 80% of the parts in any SpaceX rocket are made on the company’s own factory floor, reducing the cost of outsourcing. This keeps price per pound of payload down and quality control in house.