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).
List of modifications and remarks for various vehicle components.
| Identifier | ExFiles\Box 69\3\ scan0101 | |
| Date | 6th March 1925 guessed | |
| -2- Section. | Description of Modification. | Remarks. --- | --- | --- Cylinder. | Cracks between bolt tubes and Water Nozzles. | We have instructed modified drilling and smaller nozzles for production with existing gaskets. We shall revert to std: nozzles in new position when modified gaskets can be obtained. | Monel metal tubes instructed for 300 sets. | Exptl: Dept: are also trying copper tubes. Valves & Fittings. | Does Exptl: Dept: agree with Works' complaint re excessive wear on Tappet Roller pins. | 20HP Inlet Pipes. | New Throttle Closing Spring and Anchor Plate. | Exptl: Sets on test giving improved torque conditions. Carburetter. | Adjustable Throttle Lever. LeC.2011. | This we presume will be instructed and incorporated with new Throttle Operating Gear. | Throttle Lever & Quadrant. | Included in above. 50 Sets only Cam & lever (160°) ordered Dynamo & Magneto Drive. | Adjustable Magneto Coupling. (Taper). LeC.1990. | Exptl: Sets on test. | E.72674-Fabric Coupling Covers. | Exptl: Sets instructed. | LeC.2022 - Oil Leak remedies. | Now being detailed. | Damping out noises. | Mr Elliott's Scheme in hand. | Lighter operating Control Sleeve. | Mr Bailey is in touch with Makers. | ||