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 illustrating a crack in the crankshaft of an R-11 engine.
| Identifier | ExFiles\Box 174\4\ img022 | |
| Date | 8th December 1930 | |
| CRACK IN CRANKSHAFT (E.32903) OF R-11 ENGINE Nº 2 CRANKPIN MAIN JOURNAL MAIN JOURNAL G.P. 8-12-30 | ||