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).
Diagram illustrating clearance measurements on pressure plate lugs after 31,000 miles of use.
| Identifier | ExFiles\Box 101\2\ scan0157 | |
| Date | 6th November 1936 guessed | |
| R.R. G.V. PRESSURE PLATE LUGS. CLEARANCES AFTER 31,000 MILES. T.D.C. STAMPED FIGURE. .012" .007 .002" .008 .008 .009 .004 .007 .008 .003 .006 .007 | ||