This work aims to provide a fresh techno-economic perspective on the use of 3D printing (3Dp) for aerospace propulsion. 3Dp has brought to the aerospace industry several improvements in various areas. Historically, it has been used to produce jigs and fixtures, surrogates, mounting brackets, and prototypes. More recently, component production by 3Dp has further evolved, permitting more design freedom, lighter structures, quicker prototyping and iteration, supply chain optimization, increased customization and personalization, improved maintenance, repair, overhaul (MRO), and innovation for better materials. 3Dp is particularly relevant to designing better, quicker, and cheaper new components that integrate into more performing systems. Looking ahead, expected developments include the increased scale of 3Dp production, further enhanced performance of components and systems, in-situ manufacturing, and integration with other technologies such as Artificial Intelligence (AI) or the Internet of Things (IoT). From a market perspective, global 3Dp in the aerospace market was valued at USD 1.76–2.66 billion in 2021, with a predicted compound annual growth rate (CAGR) of 19.4–20.23 % over the next few years. Drivers for an even larger CAGR are the expected new developments, such as hydrogen general aviation, urban air mobility (UAM), electrification of aircraft, and hypersonic commercial and military applications.
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