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 document for a 2.5' propeller shaft for the 25 HP model, aimed at preventing whirling.
| Identifier | ExFiles\Box 172\1\ img179 | |
| Date | 17th October 1930 | |
| RR 755 (10M) (3-7-30) BM. 6/2571. COMPLETED 11.2.31. STANDARDISATION of CHASSIS PARTS. Date 17.10.30. Description of Parts. 2.5" Propeller Shaft for the 25 HP. Origin. To prevent whirling. Drawing No. X No. 5340. Experimental Test Report. Tests have shewn that some of the high speed roughness on the 25 HP. is due to whirling of the prop. shaft. This modification reduces the trouble. Road Test Report. Fitted to 18-G4, and will have completed 10,000 miles before cars are off test. Action options: 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. Weight of New Part. Difference per Car. Cost of Old Part. £ - 10. 0d. Cost of New Part. £ - 9. 3d. Difference per Car. £ - 9d. Decrease. Cost of Parts in Works which will be scrapped if commenced on :- Series..........£.......... Series..........£.......... Series..........£.......... Signature from Cost Dept. that above is correct. G/Rb.{R. Bowen} 4. 2. 31. G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 5. 2. 31. Wor.{Arthur Wormald - General Works Manager} APPROVAL TABLE: INITIAL | DATE | REMARKS SG.{Arthur F. Sidgreaves - MD} | 5.2.31. | Agreed SG.{Arthur F. Sidgreaves - MD} R.{Sir Henry Royce} | 7/1/31 | Agreed R.{Sir Henry Royce} WOR.{Arthur Wormald - General Works Manager} | 18.12.30 | Agreed Wor.{Arthur Wormald - General Works Manager} C. | 23.12.30 | Agreed C. RG.{Mr Rowledge} | 19.12.30 | Agreed Rg.{Mr Rowledge} DA.{Bernard Day - Chassis Design} | 22.12.30 | Agreed DA.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} | 19.12.30 | Agreed By.{R.W. Bailey - Chief Engineer} EP.{G. Eric Platford - Chief Quality Engineer} | 18.12.30 | Agreed EP.{G. Eric Platford - Chief Quality Engineer} E.{Mr Elliott - Chief Engineer} | 22.12.30 | Agreed AE. PN.{Mr Northey} | 23.12.30. | Agreed PN.{Mr Northey} HS.{Lord Ernest Hives - Chair} | | Agreed Hs{Lord Ernest Hives - Chair}/PN.{Mr Northey} (Hs.{Lord Ernest Hives - Chair} away) | ||