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).
Status report on testing and development for various 4¼ Litre Bentley, Wraith, and 25/30 HP models.
| Identifier | ExFiles\Box 123\4\ scan0342 | |
| Date | 5th October 1937 | |
| -2- 4¼ Litre Bentley. Cont'd.{John DeLooze - Company Secretary} 6-B-4. Prepared for 15,000 miles test at present running mileage on clutch. Fitted with Wraith steering and large tyres, etc. B-23-AE. Tests on cyl. bore and piston wear, and effect on oil consumption. Fitted with Hall's main and big ends. Rear main bearing to Rm.{William Robotham - Chief Engineer}67 to stop cracking Strengthened conn. rods. Cooling tests with thermostat in cyl. block and fixed shutters. B-56-BN.{W.O. Bentley / Mr Barrington} Now fitted with standard 4¼ litre engine and raised front engine mounting. Armstrong rear dampers. Large tyres. Wraith. 24-G-6. } 25-G-6. } Development of chassis. 26-G-6. } 27-G-6. } 28-G-6. In the final stages of being completed in the fitting shop. Body mounted. 25/30 HP. 22-G-5. Carburation tests used for comparison with Wraith. | ||