Why it's so hard to build a jet engine

Jet engine development is one of civilization's greatest technical challenges, demanding exceptional performance at low cost. Few companies globally can produce large commercial jet engines due to the immense difficulty and investment required. New engine development pushes technological limits in materials, temperatures, and pressures. Advances include improved compressors, heat-resistant alloys, and multi-spool designs. Commercial engines must be reliable, efficient, and durable in extreme conditions. Rigorous testing and precise manufacturing ensure safety and performance.