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).
Test and development notes for the 4 1/4 Litre Bentley and Wraith models.
| Identifier | ExFiles\Box 123\4\ scan0363 | |
| Date | 6th January 1938 | |
| -2- 4 1/4 LITRE BENTLEY - CONT'D.{John DeLooze - Company Secretary} 6.B.4. Fitted with latest P.W. all steel body. Chassis prepared for 15,000 miles test, including over-drive, new camshaft and rockers direct on coppered shaft, Centri- cast A.C.6 main bearings R.R.shims Brinell 58.72 Thermostat and fixed shutters. Large tyres and smaller wheels. B.23.AE. Tests on servo and brake linings. 45° angle timing gears. Increased inertia damper. Tempered Spring Co. Rm.{William Robotham - Chief Engineer}260 Swedish valve springs. Tests for cyl. bore and piston wear. Fixed shutters and thermostat in system. B.56.BN.{W.O. Bentley / Mr Barrington} Deturbulated cyl. head with Lucas ignition governor. Tests being carried out on Discol petrol. Thermoid clutch linings. Special brake linings. Large tyres and small wheels. WRAITH. 24.O.6 } 25.O.6 } 26.O.6 } Development of chassis. 27.O.6 } 28.O.6 } 26.O.6 being prepared for 15,000 miles test. 29.O.6 In the final completion stages, body mounted. continued | ||