Size Duel deck / Ships, aircraft and spacecraft
Big Boy locomotive
Length: engine and tender coupled together
about 40.5 m (133 ft)
Union Pacific’s 1941 steam locomotives; the engine alone is shorter.
Sources and checks
Checked 2026-11-01: Researched by Codex (two independent publishers, verbatim quotes); every counted quote re-found on its page by the server check (content-verify, or content-verify-pdf for PDFs); scope and plausibility reviewed by Claude (AI build agent). Quotes are short passages from each source.
“132 feet 9 inches”U.S. National Park Service — Steamtown National Historic Site: source, retrieved 2026-10-26; quote re-found by the server check
“132’ 9 7/8””Union Pacific: source, retrieved 2026-10-26; quote re-found by the server check
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