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, listing modifications and their implementation dates.
| Identifier | ExFiles\Box 29\2\ Scan136 | |
| Date | 1st March 1927 | |
| - 2 - BY/Mtn18/G.1.3.27. 40/50 HP. CHASSIS - STANDARDISATION SHEETS. Date Issued | Stn. Sht. No. | Title | Date Completed | Series where brought in | Chassis to test 24.9.26. | X.7310 7320 | Main Bearings with Steel Shells | 27.10.26. | Not known. 1.10.26. | X235 7250-8520 | Rear Hydraulic Shock Dampers | 6.12.26. | D-2 | 14.5.27. 18.11.26. | X.5180-8180 | Jubilee Clips for Rubber Connections | 17.12.26. | D-2 | 14.5.27. 20.11.26. | X.8080-8240 | Modified Angle to Butterfly Throttle and Modified Control to clear bonnet. | 13.12.26. | C-2-B | 16.3.27 26.11.26. | X.8430-8311 | Incorporation of B. Type Lever on chassis with "C" steering. | 2.12.26. | D-2 | 14.5.27. 15.12.26. | X.8140-8240 | Single Arm Throttle Governor Control Lever with larger diameter roller. | 20.1.27. | C-2-B | 16.3.27. 24.12.26. | X.8370 | Flexibility in Servo Shaft | 17.1.27. | D-2 | 14.5.27. 29.9.26. | X.7390-7380 | Front Wing Stay | 23.2.27. | Not settled. | ||