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).
Modifications to the 20/25 crankshaft using existing forgings, including changes to journal and web dimensions.
| Identifier | WestWitteringFiles\V\March1931-September1931\ Scan411 | |
| Date | 9th September 1931 | |
| A.{Mr Adams} FROM E.{Mr Elliott - Chief Engineer} C. to SG.{Arthur F. Sidgreaves - MD} WCR. HS.{Lord Ernest Hives - Chair} ORIGINAL E1/M9.9.31. x 5010. 20/25 MODIFIED CRANKSHAFT USING EXISTING FORGINGS. We send you herewith LeC. 2943. shewing the above. You will notice we are asking for 2.25 dia. journals assuming that this is possible with the existing crankcase material, and 2" dia. pins, which latter will require new con. rods. We have made the finished width of the web 3.450 instead of 3.250 and the allowance for machining runs very fine round the journal end of the web, but we hope there may be a little to spare above forging drawing sizes to accommodate this. E.{Mr Elliott - Chief Engineer} [STAMP: RECEIVED 1931 SEP 11] | ||