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Aerospace Engineering

Why it's so hard to build a jet engine

Jet engine development represents one of engineering's toughest challenges, requiring extraordinary performance at low cost while operating near technological limits. Modern engines must achieve high efficiency, reliability, and safety across diverse conditions, with development costs reaching billions and taking decades to yield returns. The complexity and precision required in both design and manufacturing means only a handful of companies worldwide can successfully produce commercial jet engines.

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Commercial airliners today fly slower than in the 1960s primarily due to fuel economy considerations, with modern high-bypass engines optimized for efficiency rather than speed. While the Concorde offered supersonic passenger travel until 2003, current developments in supersonic flight are limited to private business jets with potential boom-reducing technology.