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 turbulent flow radiator tubes.
| Identifier | ExFiles\Box 171\1\ img235 | |
| Date | 18th October 1930 | |
| RR 78B (10H) (3-7-30) BM. 6/2571. COMPLETED 11.3.31. STANDARDISATION of CHASSIS PARTS. Date 18.10.30. X No. 7250 / 5250. Drawing No. Part List Description of Parts. TURBULENT FLOW RADIATOR TUBES. Origin. To improve 20 HP. and 40/50 HP. Radiator efficiency. Experimental Test Report. This modification consists of putting four small bulges in the radiator tubes. Road Test Report. A gain of 5 - 6° C. has been measured at high speeds and 1 - 3° C. at low speed full throttle 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. £ Weight of New Part. Cost of New Part. £ Included under Sheet No. 7500 / 7260/7250. Difference per Car. £ Cost of Parts in Works which will be scrapped if commenced on :- Series.......£....... Series.......£....... Series.......£....... Signature from Cost Dept. that above is correct. C/Rh{R. Hollingworth} 26.1.31. G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 29.1.31. WOR.{Arthur Wormald - General Works Manager} INITIAL, DATE, REMARKS SG.{Arthur F. Sidgreaves - MD}, 30.1.31., Agreed SG.{Arthur F. Sidgreaves - MD} R.{Sir Henry Royce}, 20/10/30, Agreed RWR WOR.{Arthur Wormald - General Works Manager}, 20.10.30, Agreed Wor.{Arthur Wormald - General Works Manager} C., , Agreed C. RG.{Mr Rowledge}, 20.10.30., Agreed Rg.{Mr Rowledge} DA.{Bernard Day - Chassis Design}, 21.10.30, Agreed Da.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer}, 20.10.30, Agreed By.{R.W. Bailey - Chief Engineer} EP.{G. Eric Platford - Chief Quality Engineer}, 21.10.30, Agreed EP.{G. Eric Platford - Chief Quality Engineer} E.{Mr Elliott - Chief Engineer}, 21.10.30, Agreed AE. PN.{Mr Northey}, 4.11.30, -Agreed PN.{Mr Northey} HS.{Lord Ernest Hives - Chair}, , Agreed. [STAMP] PHANTOM 20/25 H.P. | ||