The tempo of new turboprop airliner and engine development is, by its very nature, slower than that of the turbofan-powered jetliner. Although confined to a niche market, turboprops have set such a high benchmark for efficiency since the 1990s that they have made themselves irreplaceable. Added to this, the overall lower volume of production and turnover in regional turboprops have made it tough to close the business case for expensive step-change replacements. Yet the unstoppable rise ...


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