PPRuNe Forums - View Single Post - 1912 book on flying machines

11th Jan 2015, 13:42

#3 (permalink)

Pirke

Join Date: Mar 2014

Location: Netherlands

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There has been progress in military jets, some fuel saving technologies, space flight, cheap(er) sport flying machines... but nothing like the initial boost. But then again: from nothing to something is an infinite increase percentage wise

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