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 report for front and rear brake drums made in Chromidium.
| Identifier | ExFiles\Box 120\1\ scan0243 | |
| Date | 14th October 1937 | |
| RR 755 (10H) 46071 18-8-37 WHK 27059 COMPLETED 16.11.37. PHANTOM III STANDARDISATION OF PARTS. Date 14.10.37 X No. 1028. Drawing No. G.85623/4 Part List Description of Parts: FRONT AND REAR BRAKE DRUMS MADE IN CHROMIDIUM. Origin: To enable us to use Ferodo ML; M.L. has not been tested with present drums. Report of Experimental Test. The original reason for preferring to use "Chromidium" was that it is 7/- per cwt. cheaper than "Millenite". "Chromidium" drums ran 16,000 miles on 32-EX against M.L. and were satisfactory; also fitted to 33-EX. The "Chromidium" tested was brought out but it is proposed to cast in future in our own Foundry. Cost of Old Part MATERIAL: £5 11s 0d LABOUR: £1 2s 2d CHARGES: £1 18s 9d TOTAL: £8 11s 11d Cost of New Part MATERIAL: £1 8s 3d LABOUR: £1 15s 3d CHARGES: £3 7s 6d TOTAL: £6 11s 0d Nett Decrease: £2 0s 11d Signature from Cost Dept. that above is correct. G/Rb.{R. Bowen} 13.10.37. INITIAL | DATE | REMARKS SG.{Arthur F. Sidgreaves - MD} | 16-11-37 | Agreed SG{Arthur F. Sidgreaves - MD} HS.{Lord Ernest Hives - Chair} | 16/11/37 | Agreed HS{Lord Ernest Hives - Chair} C. | 15.10.37. | Agreed C. BY.{R.W. Bailey - Chief Engineer} | 16.11.37 | Agreed By DA.{Bernard Day - Chassis Design} | 16.11.37 | Agreed Da{Bernard Day - Chassis Design} RHC.{R. H. Coverley - Production Engineer} | 16-11-37 | Agreed RHC{R. H. Coverley - Production Engineer} MX.{John H Maddocks - Chief Proving Officer} | 16/11/37 | Agreed MX{John H Maddocks - Chief Proving Officer} RM.{William Robotham - Chief Engineer} | 14.10.37. | Agreed Rm.{William Robotham - Chief Engineer} | ||