page_title: Rolls-Royce Eagle
section_title: Variants
hierarchical_section_title: Rolls-Royce Eagle / Variants
caption_attribution_description: English: Rolls Royce Eagle VIII engine at the South African National Museum of Military History
context_page_description: The Rolls-Royce Eagle was the first aircraft engine to be developed by Rolls-Royce Limited. Introduced in 1915 to meet British military requirements during World War I, it was used to power the Handley Page Type O bombers and a number of other military aircraft.
  The Eagle was the first engine to make a non-stop trans-Atlantic crossing by aeroplane when two Eagles powered the converted Vickers Vimy bomber on the Transatlantic flight of Alcock and Brown in June 1919.
context_section_description: Note:
  Eagle I (Rolls-Royce 250 hp Mk I)
  (1915), 225 hp, 104 engines produced in both left and right hand tractor versions.
  Eagle II (Rolls-Royce 250 hp Mk II)
  (1916), 250 hp, 36 built at Derby.
  Eagle III (Rolls-Royce 250 hp Mk III)
  (1917-1927), 250 hp, increased compression ratio (4.9:1), strengthened pistons. 110 built at Derby.
  Eagle IV (Rolls-Royce 250 hp Mk IV)
  (1916-17), 270/286 hp, 36 built at Derby.
  Eagle V (Rolls-Royce 275 hp Mk I)
  (1916-17), 275 hp, high-lift camshaft, 100 built at Derby.
  Eagle VI (Rolls-Royce 275 hp Mk II)
  (1917), 275 hp, first use of twin spark plugs, 300 built at Derby.
  Eagle VII (Rolls-Royce 275 hp Mk III)
  (1917-18), 275 hp, 200 built at Derby.
  Eagle VIII
  (1917-1922), 300 hp, extensive modifications, 3,302 built at Derby.
  Eagle IX
  (1922-1928), 360 hp, developed as a civil use engine, 373 built at Derby.
caption: Rolls-Royce Eagle VIII
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