structural:summarization, structural:scholar_edition
Interwar aviation; the "Golden Age"

The so-called Golden Age of Aviation occurred between the two World Wars, during which updated interpretations of earlier breakthroughs. Innovations include Hugo Junkers ' all-metal air frames in 1915 leading to multi-engine aircraft of up to 60+ meter wingspan sizes by the early 1930s, adoption of the mostly air-cooled radial engine as a practical aircraft power plant alongside V-12 liquid-cooled aviation engines, and longer and longer flights – as with a Vickers Vimy in 1919, followed months later by the U.S. Navy's NC-4 transatlantic flight; culminating in May 1927 with Charles Lindbergh 's solo trans-Atlantic flight in the Spirit of St. Louis spurring ever-longer flight attempts.