General Electric designed this proof-of-concept turboprop “unducted fan” engine as part of NASA’s Advanced Turboprop Project, which was aimed at overcoming the three-fold increase in fuel prices ...
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Boeing’s propfan 747 that never took off - 747-500
Boeing studied a radical 747-500 powered by large propfan engines instead of conventional turbofans. The design aimed to reduce fuel consumption and operating costs while extending range, combining ...
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