Comparison table of projected bearing areas, critical speeds, and crankpin areas for various component configurations.
| Identifier | ExFiles\Box 85\5\ scan0102 | |
| Date | 19th July 1935 guessed | |
| PROJECTED BEARING AREAS FRONT | INTER | CENTRE | REAR | STIFFNESS | CRITICAL SPEED | CRANKPIN AREA STANDARD | 3.54 | 2.58 | 3.72 | 4.05 | | 5,000 | 2.750 2.5 DIA JOURNAL 1.125 WIDE PINS | 4.9 | 3.8 | 5.05 | 6 | | 5,325 | 2.250 2.5 DIA JOURNAL 1.250 WIDE PINS | 4.34 | 3.5 | 4.74 | 5.65 | | 5,260 | 2.50 NARROW PIN (1.000 WIDE) | 3.54 | 2.58 | 3.72 | 4.05 | | 5,320 | 2.0 | ||
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).