Was the Supermarine Spitfire simply developed from a Schneider Trophy seaplane racer?
Short answerNo; fighter work, including an earlier Fleet Air Arm-oriented design, used techniques honed on Schneider Trophy racers rather than a direct seaplane conversion.
NotesAn audience comment compresses the Spitfire's origin into a direct development from a Schneider Trophy seaplane racer. The fighter lineage instead included an earlier Fleet Air Arm-oriented design. Supermarine applied techniques used in the racing programme without simply turning one of its competition seaplanes into the Spitfire. The correction shows how engineering knowledge can pass between projects even when the finished aircraft are not direct conversions of one another.