Ferdinand Léon Delagrange died on January 4, 1910, when the wings of his Blériot monoplane folded during a steep turn.
Notes on verification
Multiple independent contemporary and modern sources corroborate date, location, aircraft, and cause of death, including period newspaper reports and Wikipedia articles. [cascade flags: wikipedia_dropped_other_sources_exist | tier=silver indep_score=0.8 clusters=3 claim_tier=notable | kind=empirical eligibility=high]
Sources
- After Thomas Selfridge (seed:firsts_and_inventions)
- https://historynet.com/french-aviation-pioneer/ (corroboration)
- https://www.thisdayinaviation.com/tag/leon-delagrange/ (corroboration)
- http://www.motorsportmemorial.org/focus.php?db=a&n=8744 (corroboration)