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 of a failed G.I. Pressure Plate with annotated cracks.
| Identifier | WestWitteringFiles\U\May1930-July1930\ Scan155 | |
| Date | 23th July 1930 | |
| CRACKED RIGHT THROUGH AND OPENED OUT APPROX .032". CRACK STARTED. CRACK STARTED. FRONT. G.I. PRESSURE PLATE EX. 5090 FAILED 18. 7. 30. ROLLS-ROYCE. LIMITED. PRINT ROOM. 23 JUL 1930. DERBY. | ||