Click to open image viewer. Rotol introduced the R130 propeller for the Vickers Viscount airliner in 1954. The R130’s electrically-actuated hub mechanism and square-tipped aluminum alloy blades were a ...
Ludwig Wittgenstein was among the most difficult and abstract of philosophers. But that’s not how he started out. Wittgenstein was an early pioneer in aeronautical engineering. He published a treatise ...
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