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).
Blueprint with diagrams and formulae for a 6-cylinder, 4-bearing engine crankshaft.
| Identifier | ExFiles\Box 6\1\ 01-page140 | |
| Date | 28th February 1920 | |
| 6-CYL. 4-BEARING ENGINE. CRANKSHAFT. FIG I PARALLEL CRANKS (E.G. CRANKS 3 & 4). l = 2b + 8h - 3/2 A (d^4 - d1^4) / (L^4 - d1^4) + 3/2 τ (d^4 - d1^4) / (h w^3) (W IS MEAN WIDTH) 120° CRANKS (E.G. CRANKS 1 & 2, 5 & 6). l = 2b + 8h + 3/2 A (d^4 - d1^4) / (d^4 - d1^4) + 3/2 τ (d^4 - d1^4) / (H W^2) + 3τ (d^4 - d1^4) / (H W^2) ALL OTHER DIMENSIONS AS IN CARTER'S FORMULA. TES 28/2/20 | ||