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).
Comparison table of crankshaft specifications for various engine models.
| Identifier | ExFiles\Box 128\1\ scan0033 | |
| Date | 11th October 1927 guessed | |
| CRANKSHAFT DETAILS. Engine Part No. | Lorraine. | EAC.10 & 14. LEC.2486 | Stutz. 8. | 2nd. India 111. LEC.249 No. of brgs. | 4 | 7 | 9 | 7 Outer dia. | 1.890 | 2.6245 | 2.500 | 2.125 Inner dia. | .800 | 1.500 | | 1.125 Length of | | | | No.1 | 1.960 | 2.100 | 1.850 | No.2 | | 1.650 | * | No.3 | 2.055 | 1.650 | * | No.4 | | 1.650 | * | No.5 | 2.055 | 2.650 | * | No.6 | | 1.650 | | No.7 | 3.350 | 3.000 | No.9 2.750 | Crankpins. | | | | Outer dia. | 1.771 | 2.125 | 2.375 | 1.750 Inner dia. | | 1.125 | | .875 Length. | 1.650 | 1.850 | 1.400 | 1.500 Crank radius. | 2.559 | 2.750 | 2.250 | 2.250 Nose. | | | | Outer dia. | 1.615 | 1.700 | | Inner dia. | | 1.000 | | Length. | .690 | 2.75 | | Length of pins and journals include fillets but not .010 facings. | ||