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 showing modifications to the Peregrine brake system to bring it into line with the 20/25 specification.
| Identifier | ExFiles\Box 1\10\ B001_X106 TO X 110-page016 | |
| Date | 11th November 1932 guessed | |
| 13 150 5.250, 1.425, 1.425 1.625, 1.625 1.5 ALTER TO 5.000 .325 CAM 2.0 2.750, 3.0 2.5, 4.8 3.4 ALTER TO 3.140 .325 CAM, 3.5 2.0 1.625 1.625, 1.875 6.5 3.875 ALTER TO 1.230 MODIFICATIONS TO PEREGRINE BRAKE SYSTEM TO BRING INTO LINE WITH 20/25 | ||