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 chassis parts for an engine with 5.25 to 1 compression ratio.
| Identifier | ExFiles\Box 172\1\ img166 | |
| Date | 24th April 1930 | |
| RR 785 REVISED (10M) (DG 248 19-7-29) SM. 6/643. COMPLETED 27.6.30. STANDARDISATION of CHASSIS PARTS. Date 24.4.30. X No. 5770 Description of Parts. Engine with 5.25 to 1 compression ratio. With coil ignition timing set to 15º full advance. Origin. To increase acceleration and higher maximum speed. Experimental Test Report. This gives an increase of about 16% available HP. Carburetter made slightly larger. Road Test Report. Fitted to G-G4 and ran 14,000 miles in France with very good results. No serious trouble developed in the engine during the test. 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. D Use existing stock Alteration effective on future Chassis. Weight of Old Part. Cost of Old Part. £11.4.11. Wor.{Arthur Wormald - General Works Manager} 29.5.30. Weight of New Part. Cost of New Part. £11.5. 4. Difference per Car. Difference per Car. £ - - 5. Increase. Signature from Cost Dept. that above is correct. G/Rb{R. Bowen} 29.5.30. G.30.5.30. Cost of Parts in Works which will be scrapped if commenced on :- Series.........£....... Series.........£....... Series.........£....... INITIAL | DATE | REMARKS BJ. SG.{Arthur F. Sidgreaves - MD} | 16.6.30 | Agreed Sg.{Arthur F. Sidgreaves - MD} R.{Sir Henry Royce} | 27/5/30 | Agreed JH! WOR.{Arthur Wormald - General Works Manager} | 25.4.30 | Agreed Wor.{Arthur Wormald - General Works Manager} RG.{Mr Rowledge} | 29.4.30 | Agreed Rg.{Mr Rowledge} DA.{Bernard Day - Chassis Design} | 2.5.30 | Agreed Da.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} | 28.4.30 | Agreed BY.{R.W. Bailey - Chief Engineer} EP.{G. Eric Platford - Chief Quality Engineer} | 25.4.30 | Agreed. Judged by one car only 14-G4. E.{Mr Elliott - Chief Engineer} | 16.5.30 | Agreed AE. PN.{Mr Northey} | 28.4.30 | Agreed PN.{Mr Northey} CWB. | 25.4.30 | Agreed C. HS.{Lord Ernest Hives - Chair} | | Agreed [STAMPED TEXT] 0/25 H.P. CHASSIS | ||