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).
List of proposed engine improvements and development areas, page 4.
| Identifier | ExFiles\Box 3\6\ 06-page242 | |
| Date | 2nd October 1934 guessed | |
| -4- (14) Engine Silence. (a) Silent tappets - Cadillac and Halford. (b) Elimination of valve spring surge. (c) Textolite gears. (d) Boom periods. Light clutch, H.Sch.4190. 4-bearing crankshaft. Lightened reciprocating parts. Narrow pin rods. RR.53 Aerolites. (e) Stiffen up flywheel crankcase web and flywheel bearing dia. on 7 bearing as on 4 bearing shaft. (f) Endurance tests on chain drive for front end. (g) Silent fans. Swindall, Steadman, Hardy. (15) Improved Durability & Reliability. (a) Lead bronze big ends. (b) Aerolite pistons. (c) Stellited valves. Inserted seats. Ll.Smith. (d) Double contact breaker. (e) Dual ignition. Wood single tests. (f) Improved clutch wearing surfaces. (g) Better ignition wires. (h) Better oil cooling and filtering. West, C.W.H. (France). (16) Improved Power Output. (a) Do we want 1.5 inlet. Do we gain from moving valves together. If not, alum. head. (b) Larger radius cam followers on standard shaft. (c) Facing forward intake, ramming type. Salt, Smith. (17) Weight Saving. (a) Magnesium parts. (b) Aluminium cyl. head. (c) Peregrine steering column. (d) Lightened flywheel. Bowering. | ||