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).
Pair of graphs showing road test results on a Bentley to determine maximum permissible advance to avoid detonation.
| Identifier | ExFiles\Box 82\4\ scan0324 | |
| Date | 16th May 1936 guessed | |
| ROAD TESTS ON BENTLEY TO DETERMINE MAX PERMISSIBLE ADVANCE TO AVOID DETONATION. B.23 A.E. Y-Axis: DEGREES ADVANCE ON FLYWHEEL TO JUST AVOID DETONATION. X-Axis: M.P.H. Top Graph Legend: A = DE-TURBULATED HEAD B = STD. HEAD B.V.36 FIXED R.R. IGNT. Bottom Graph Legend: A = DE-TURBULATED HEAD B = STD HEAD B.V.86 FIXED DELCO IGNT. BOTH CYL HEADS 109CC 6.8-1 C/R G.H. WHYMAN | ||