From time to time Boeing purchases aircraft back from various airlines to study the effects of years of use. In this photo - taken at the 'Future of Flight' we can see the engine from a Korean Airlines 747 displayed against the forward fan section of Boeing 787 dreamliner. The video display at the top explains how a jet engine generates the thrust for heavier than air flight. The principles of jet propulsion are the same as ever; suck-compress-burn-blow-go; but the efficiency of all that and the materials used to achieve ithave advanced immeasureably over the years.
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