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).
Bar chart showing the total running time and endurance of various main bearings.
| Identifier | ExFiles\Box 97\1\ scan0021 | |
| Date | 27th November 1936 | |
| BV101 HOURS RUN 100 200 300 400 500 600 700 800 TOTAL RUNNING TIME WITH VARIOUS MAIN BEARINGS ON ENDURANCE. WHITE-METAL 501 HRS. R.R. LEAD-BRONZE 147 HRS. HALL'S METAL HALL'S METAL ON STEEL SHELLS SOLID HALL'S METAL 596 1/2 HRS. HOYT'S METAL. 11 HRS. TOTAL ENDURANCE RUNNING ON ALL TYPES - 1255 1/2 HRS. MTHS{Reg Matthews} 27-11-36. | ||