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).
Test data sheet for Bentley Development on a deturbulated Cylinder Head, showing performance metrics.
| Identifier | ExFiles\Box 103\4\ scan0160 | |
| Date | 20th March 1936 guessed | |
| BENTLEY DEVELOPMENT Cylinder Head Hs.{Lord Ernest Hives - Chair} 2118 EB. 615 Deturbulated. R.P.M. B.M.E.P. C B.H.P. 4500 74.7 95.2 4250 86.7 104.3 4000 94.4 108.9 3750 101.3 107.7 3500 107.5 106.3 3000 115.2 97.7 2500 119.8 84.6 2000 122.2 69.1 1500 119. 50.6 1000 113. 32. 750 111.2 23.5 | ||