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).
Standardisation sheet for the 40/50 HP chassis, detailing component updates and testing dates.
| Identifier | ExFiles\Box 29\2\ Scan121 | |
| Date | 1st December 1926 guessed | |
| - 2 - 40/50 HP. CHASSIS - STANDARDISATION SHEETS. Date Issued | Title | Date Completed | Series where Brought in | Chassis to Test --- | --- | --- | --- | --- 24.9.26. | Bottom Washer for Valve Springs | 20.10.26. | C-2-A | 15.1.27. 24.9.26. | Front Silencer | 19.10.26. | D-2-A | 30.7.27. 24.9.26. | Rear Road Spring Roller and Plate | 19.10.26. | C-2-A | 15.1.27. 24.9.26. | Petrol Tank with larger Filler | 19.10.26. | C-2-A | 15.1.27. 1.10.26 | Gear Box to suit Plunger controlled Selectors - torsionally free 1st and 2nd pinions, and sliding wheels re-arranged to give definite end clearance. | 27.10.26. | D-2 | 30.7.27. 24.9.26. | "D" type C.H.N.S. Keyed Type Change Gear Shaft - Modified bush and spring. | 19.10.26. | D-2 | 30.7.27. 24.9.26. | Main Bearings with Steel Shells | 27.10.26. | Not known. 22.9.26. | Distribution Box cover secured in position by round thumb screws. | 20.10.26. | C-2-A | 15.1.27. 25.10.26. | Spring Loaded Cross Steering Tube Ball Ends. | 26.11.26. | C-2-A | 15.1.27. | ||