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).
Standardisation of connecting rods with loose big end bearings to improve reliability.
| Identifier | ExFiles\Box 172\1\ img085 | |
| Date | 18th May 1926 | |
| RR 755 (10M) (DB{Donald Bastow - Suspensions}130 12-9-24) MS 301225 ORIGINAL COMPLETED 27.5.26 STANDARDISATION of CHASSIS PARTS. Date 18.5.26. No. 5030 Description of Parts CONNECTING RODS WITH LOOSE BIG END BEARINGS. Origin. To improve reliability. Experimental Test Report. We have a fair amount of trouble with connecting rod bearings on 20 HP. Test bench tests and road tests have proved the loose bushes to be more reliable. Road Test Report. Run 10,000 miles in France on 10-G-111. This car was run at very high speeds. Fitted to 9-G-111 - run 1500 miles. Drawing No. Part List A Scrap and replace at all costs, including Chassis already delivered to customers. B Scrap and replace on Chassis in works. C Scrap present stock and replace on all Chassis not yet handed to test. [X] D Use existing stock Alteration effective on future Chassis. Weight of Old Part. Cost of Old Part. £ 8. 10. 0 Cost of Parts in Works which will be scrapped if commenced on:- Weight of New Part. Cost of New Part. £ 9. 12. 0 Difference per Car. Difference per Car. £ 1. 2. 0 increase. Signature of Mr. De LOOZE that above is correct. My/Rb.{R. Bowen} 21.5.26. SIGNATURES DATE REMARKS MR. WADDINGTON 19.5.26 Agreed. CWB. MR. B. JOHNSON 27.5.26 Agreed. B.Johnson. MR. ROYCE 21/5/26. Agreed FHR but not good title. "Finished big ends" MR. WORMALD 19.5.26 Agreed. Wor.{Arthur Wormald - General Works Manager} MR. ROWLEDGE 18.5.26 Agreed. RG.{Mr Rowledge} MR. DAY 20.5.26 Agreed. Da.{Bernard Day - Chassis Design} MR. BAILEY 19.5.26 Agreed. B`. MR. PLATFORD 19.5.26 Agreed. EP.{G. Eric Platford - Chief Quality Engineer} MR. ELLIOTT 21/5/26 Agreed. AE MR. NORTHEY 20.5.26 Agreed. PN.{Mr Northey} MR. HIVES 26.5.26 Agreed. E.Hives. [STAMP: 20 H.P.] [STAMP: CHASSIS] | ||