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).
Testing and potential standardization of Phantom III connecting rod bearings made of A.C.6 material.
| Identifier | ExFiles\Box 115\3\ scan0191 | |
| Date | 4th February 1938 | |
| Sg.{Arthur F. Sidgreaves - MD} from Rm.{William Robotham - Chief Engineer} c. Hs.{Lord Ernest Hives - Chair} c. RHC.{R. H. Coverley - Production Engineer} c. By.{R.W. Bailey - Chief Engineer} 1020 Rm.{William Robotham - Chief Engineer}2/AP.4.2.38 P.III. CONNECTING ROD BEARINGS IN A.C.6. MATERIAL. Replying to Sg.{Arthur F. Sidgreaves - MD}10/E.3.2.38, in September last we completed 65 hours endurance running on a set of Hall's Alloy big end bearings. This is equivalent to more than 60,000 miles on the road. The present Phantom III. bearing will stand about 25 hours on the test bed, and on Raphael's car bearings had to be removed after 25,000 miles road running. The Hall's metal bearing fits into the existing connecting rod. Three or four sets of these bearings have been fitted up in the experimental Dept, but before issuing a Standardisation Sheet we wish to be sure Production can manufacture these bearings without difficulty. For this reason we have asked for a dozen sets to be put in hand. If they are satisfactorily passed off test, then we propose to issue a Standardisation Sheet forthwith. In the meantime we have asked Sr. to get some road mileage in on his Paris Demonstration Car. Since the present policy is to cut down development expenditure on the P.III, with which we entirely agree, we have got to be prepared to standardise certain parts on bench testing. If a P.III. connecting rod comes through the crankcase, we should expect it to cost the Company over £100. Rm.{William Robotham - Chief Engineer} | ||