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).
Performance comparison graph for three different diesel cylinder head types on a six-cylinder engine.
| Identifier | ExFiles\Box 133\3\ scan0053 | |
| Date | 2nd April 1937 | |
| B.M.E.P. LBS/IN² LBS/B.H.P./HOUR B.H.P. R.P.M. DIESEL CYL. HEAD COMPARISON. BASED ON SIX CYL. 3½"x4½" ENGINE. COMET LANOVA DIRECT INJECTION CH/39 JNR{Charles L. Jenner} 2.4.37 | ||