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 comparing the total running time and endurance of various types of main bearings.
| Identifier | ExFiles\Box 115\1\ scan0199 | |
| Date | 27th November 1936 | |
| HOURS RUN 100 200 300 400 500 600 700 800 TOTAL RUNNING TIME WITH VARIOUS MAIN BEARINGS ON ENDURANCE BV101 WHITE - METAL 501 HRS R.R. LEAD - BRONZE 147 HRS. HALL'S METAL HALL'S METAL ON STEEL SHELLS SOLID HALLS 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. | ||