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).
Revisions to the crankshaft and connecting rods for models EAC 10 and 14.
| Identifier | WestWitteringFiles\R\October1927-December1927\ Scan105 | |
| Date | 25th November 1927 | |
| ~~BY.{R.W. Bailey - Chief Engineer}~~ FROM E.{Mr Elliott - Chief Engineer} C. to HS.{Lord Ernest Hives - Chair} EAC.10. & 14. CRANKSHAFT AND CON. RODS. X8010 ~~X8030~~ X7010 ~~X8000~~ X7030 We send you herewith LeC. 2488. shewing the revised crankshaft and con. rods for EAC. 10. and 14. The crankpins are the present standard dia. and length. The crank webs are 1" between the collars instead of 1.075", the increased dimensions being added to the main bearings with the exception of the rear. The intermediate bearings bushes are increased in length by .150" but the crankcase remains unaltered. Nos. 1. and 4. bearing bushes remain their present length, but naturally have increased end clearance. The bore of the con. rod has now been taken right through to facilitate manufacture. Since the little end has to span the hole thus formed we call for phosphor bronze for the bush instead of duralumin or magnesium. The stem of the rod has been slightly reduced in dia. The big end shell is substantially of the same thickness as the previous design, but is made to suit the larger diameter. The crankshaft will go into an existing crankcase and will take the standard rods. E.{Mr Elliott - Chief Engineer} | ||