Das Flugprincip

Das Flugprincip (The Flight Principle) is a book about aviation written by German engineer and inventor Carl Buttenftedt. The book, first published in 1884, outlines Buttenftedt's theories on the principles of flight and includes detailed depictions of his flying machines. Despite never actually achieving sustained flight, Buttenftedt's work was influential in the early development of aviation technology.

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