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 detailing a Bentley piston failure, showing a crack and dimensional data.
| Identifier | ExFiles\Box 3\6\ 06-page024 | |
| Date | 29th August 1939 | |
| Hs.{Lord Ernest Hives - Chair} 1116 BENTLEY PISTON FAILURE A DIA B DIA C DIA D DIA CRACK PISTON TYPE | DIA A | DIA B | DIA C | DIA D Mx.{John H Maddocks - Chief Proving Officer}TYPE | 3.227 | 3.231 | 3.240 E.B.506 | 3.230 | 3.099 | 3.247 | 3.318 ROLLS ROYCE LTD. PRINT ROOM AUG 29 1939 DERBY | ||