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).
Cost comparison for 'Chromidium' Bentley brake drum castings between in-house production and Midland Cylinder Co.
| Identifier | ExFiles\Box 148\5\ scan0203 | |
| Date | 16th September 1937 | |
| MARTINDALE 1028 1260 To BY.{R.W. Bailey - Chief Engineer} - From RHC{R. H. Coverley - Production Engineer}/SB.{Mr Bull/Mr Bannister} c. Rm.{William Robotham - Chief Engineer} c. Hs.{Lord Ernest Hives - Chair} File RHC{R. H. Coverley - Production Engineer}/SB.{Mr Bull/Mr Bannister}2/FH.16.9.37. BENTLEY BRAKE DRUMS (STANDARDISATION SHEET X1028). We have investigated the relative cost of 'Chromidium' Brake Drum Castings produced by ourselves and the Midland Cylinder Co., and give below comparative figures :- R.R. Cost Midland Inc: 215% (Burden). Cylinder Co.Cost. GB.2722 Rear Brake Drum. 15s. 4d. ea. 13s. 0d. ea. GB.2723 Front Brake Drum. 11s. 9d. 9s. 0d. ea. Chassis Cost of Castings £2 .14s. 2d. £2. 4s. 0d. (2 ea). For the purpose of costing, Midland Cylinders have estimated the rear brake drum weight to be 38 lbs, whereas the R.{Sir Henry Royce} R.{Sir Henry Royce} cost assumes this to be 45 lbs, hence we could anticipate a rise in cost of about 2/6d. per Chassis when deliveries commenced which would reduce the apparent saving from 10/2d. to 7/8d. A further point for consideration is that the R.{Sir Henry Royce} R.{Sir Henry Royce} Foundry burden of 215% would be reduced if the Dept. was handling more work than at present, and in view of the fact that we have ample capacity we recommend that the Brake Drums be produced in our own Foundry. RHC{R. H. Coverley - Production Engineer}/S.Bannister. | ||