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 details for various engines.
| Identifier | ExFiles\Box 65\4\ scan0218 | |
| Date | 2nd February 1928 guessed | |
| CRANKSHAFT DETAILS. Engine Part No. Lorraine. | EAC.10 & 14. LEC.2488 | 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. | ||