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).
Numbered list of engineering modifications with their implementation status.
| Identifier | ExFiles\Box 82\2\ scan0119 | |
| Date | 26th July 1934 | |
| -2- RB{R. Bowen}/Rn.{Mr Robinson}2/KW. 26.7.34. c x (12) Rubber mounting of rear of engine, cut-out mechanism modified to suit. Lec.3808-3837. Standard c x (13) Unbalanced radiator shutters to prevent these being closed by wind pressure. Lec.3795-3807. Standard c x (14) 50 m.m. Harrison Radiator. This saves 30 lbs. weight. Standard (15) Gearbox in magnesium, also clutch pit. Not Standard ? (16) Scheme for preventing bonnet side plates rattling. Not Standard c x (17) Front road springs with improved clips to prevent top leaf collapsing under braking torque. Standard c x (18) Scheme for preventing rattling of synchromesh dogs when clutch is engaged. Standard (19) Modifications to enable fan belt to be removed, Lec.3784. Standard c x (20) Starter motor with reduction gear, Lec.3892. Standard c x (21) Quick changeover scheme for ignition coils mounted on the wheelcase. Standard c x (22) Larger horn button, Lec.3874. Standard c ✓ (23) Fully floating servo. Standard c (24) Spherical bearing pedal shaft. Standard c x (25) Head lamp pillars outside frame, R.R.Sch.114. Standard c ✓ (26) Tunnel and cover for starting handle, Lec. Standard c x (27) Spherical bearing equaliser shafts. Standard | ||