From F.H.R. to Mr. Swetnam requesting a trial drawing to increase crankshaft rigidity.
| Identifier | ExFiles\Box 25\3\ Scan001 | |
| Date | 15th June 1910 | |
| H92-T.H 90-01: Aoy. 14)(a og) + zzr .H.H 15th June 1910. Mr. Swetnam. 15/6/10 R1/D15610 Will you please get out the necessary trial drawing for increasing the crankshaft until the vibration is about 2,100 revs. Rigidity will have to be as 16^2 is to 21^2; rigidity is equal to D^4. F.H.R. X634 | ||
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).