From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
List of references to journal articles about Cotal gearboxes.
| Identifier | ExFiles\Box 136\2\ scan0293 | |
| Date | 2nd August 1940 | |
| -4- Ev{Ivan Evernden - coachwork}/Tln.2/JH.2.8.40. References to Cotal gearboxes occur in :- I.A.E: Journal DEC. 1937 "Transmission Gear Developments by L.J. Shorter. S.I.A. Hournal Jan. Feb. 1940 "Cotal Electro Mechanical Gearbox" by J.{Mr Johnson W.M.} Cotal and "Development of Cotal Gearbox" by J.{Mr Johnson W.M.} Elwell. Ev{Ivan Evernden - coachwork}/Tln. | ||