Supermarine S.4

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The Supermarine S.4, which first flew in 1925, is a British racing floatplane emphasizing speed competition. Measuring 7.9 meters long with a 9.3-meter wingspan and single engine, this aircraft achieves 384.6 km/h. The S designation reflects Supermarine's racing aircraft series, combining innovative design with powerful engines. The S.4's speed and float configuration reflect interwar racing competition traditions when manufacturers competed for prestige and air-speed records. Its advanced aerodynamic refinement influenced subsequent aircraft design.