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 detailing modifications to vehicle components, including brakes, axles, and engine parts.
| Identifier | ExFiles\Box 92\3\ scan0080 | |
| Date | 29th January 1937 | |
| -2- Rm.{William Robotham - Chief Engineer}11/AP.29.1.37. (15) Machine rivetted brake linings. Copper rivets. (16) Special silent tread tyres. (17) R.R. cast iron brake drums. (18) Reversed propeller shaft. (19) Increased hand brake travel. (20) Increased front brake travel. (21) Rear axle with larger thrust washers and strengthened case. (22) Rubber connecting tubes for roll rods and rear shock absorbers. (23) Alternative front roll rod. ENGINE (1) 4 port cylinder heads and improved induction pipe. (2) Latest Hoyt type main and big end bearings. Improved oil feed. (3) Deletion of hydraulic tappets and new camshaft to suit. (4) Less costly cylinder liners. (5) Modified oil feed to rockershaft to reduce wear on ball ends. (6) Less expensive valve springs. (7) Less costly filter element in air silencer. (8) L. section piston rings. (9) Carb. float lever ratio altered to improve consumption; smaller jets. (10) Less costly exhaust valves. (11) Close clearance inlet guide clearances to reduce top overoiling. (12) Fan - more effective fan - Cadillac five blade type. continued. | ||