Rarely has aviation history witnessed an era when so many large business jet engines have been simultaneously in development and battling for market share. Benefiting from the latest combustion technology, metallurgy, manufacturing processes and computational fluid dynamics (CFD) software and nominally bracketing thrust ratings between 10,000 and 20,000 lb., these new generation turbofans promise “step changes” in fuel economy; emissions, noise and weight reduction; and reliability and ...

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