Perhaps the trickiest decision in designing a turboprop airliner is choosing the speed. The main point of such aircraft is economy, but speed for a turboprop simply equates to power, and power equates to fuel burn—not to mention engine mass and cost. Moreover, many aviation professionals argue that, over the ranges that such aircraft usually fly, the passenger barely notices even a 20% difference in cruising speed. A counter argument is that a faster aircraft can fly more services ...


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