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 modifications and new parts relating to braking, clutch, and engine components.
| Identifier | ExFiles\Box 82\2\ scan0015 | |
| Date | 20th February 1934 | |
| - 3 - (28) Strengthened intermediate levers - shock dampers. N.Sch.3983. (29) Direct braking to all four wheels. (30) Needle bearings in servo bridge. N. Sch.3928. (31) Fully floating servo. (32) Spherical bearing equaliser shafts. N. Sch's.3887,3912,3932. (33) Protected brake adjustment. N. Sch.3931. (34) 14" dia. Front brake drums. N. Sch.3974/3979,3980. (35) 14" dia. Rear Brake drums. N. Sch.3974,3978. (36) Modified water excluders - brake drum dust covers N.Sch. 3973. (37) Strengthened brake toggles. N. Sch.3958. (38) Forged steel clutch pressure plate. N. Sch.3900. (39) Clutch with wider friction surfaces - lightened flywheel. N. Sch.3948. (40) Easy adjustment for clutch - application to existing cars N. Sch.3954. (41) Rear axle pinion thrust bearing modifications. (42) Rubber rear engine mounting - scheme required. (43) Revised exhaust cut out - scheme required. EXP (44) Magnesium parts. (45) Damper flywheels on transmission. N. Sch.3911. (46) Modified engraving of road wheel nuts LeC.3767. The following new parts should be fitted to the engine unit. (1) Crankshaft - with integral balance weights - LeC.3632. (2) Double contact breaker LeC.3323 - with tufnol bushes and brass pivot pins. (3) Textolite timing gears (with balancing cam) - Hs.{Lord Ernest Hives - Chair}1219-1221 | ||