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).
Graph plotting road test results on a Bentley to determine the maximum permissible ignition advance to avoid engine detonation.
| Identifier | ExFiles\Box 101\3\ scan0017 | |
| Date | 11th June 1936 guessed | |
| ROAD TESTS ON BENTLEY TO DETERMINE MAX. PERMISSIBLE ADVANCE TO AVOID DETONATION DEGREES ADVANCE ON FLYWHEEL TO JUST AVOID DETONATION M.P.H. B.23 A.E. TOP GRAPH: A - DE-TURBULATED HEAD B - STD. HEAD B.V. 36 FIXED R.R. IGNT. BOTTOM GRAPH: A - DE-TURBULATED HEAD B - STD. HEAD B.V. 66 FIXED DELCO IGNT. BOTH CYL. HEADS 109 C.C. 6.8 - 1 C/R G.H. WHITMAN | ||