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).
Blueprint diagram of No. 5 piston noting that the top two rings on all pistons were found jammed.
| Identifier | ExFiles\Box 86\2\ scan0038 | |
| Date | 18th August 1933 | |
| MILEAGE 6334 PREVIOUS MILEAGE BEFORE FAILURE 4877 Nº 5 PISTON. THE TWO TOP RINGS ON ALL PISTONS WERE FOUND JAMMED. G.W.H. | ||