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 four-wheel brakes.
| Identifier | ExFiles\Box 171\3\ img245 | |
| Date | 15th July 1924 | |
| RR 755 (10M) (SL381 2-11-23) MP 261297 COMPLETED 26.11.24. STANDARDISATION of CHASSIS PARTS. Date 15.7.24. Description of Parts. FOUR WHEEL BRAKES. [X] No. 9940 Drawing No. Part List Origin. To improve design. Experimental Test Report. "Adopted" scheme of Four Wheel Brakes. Braking ratios :- Rear 60% Front 40% Road Test Report. Run 10,000 miles in France on 98-NK car. Run 11,000 miles in France on 35-PK car. Fitted to 48-PK, 44-PK, 9-PK and 93-NK - run to total of 11,000 miles in England. Recommended for standardisation. 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. £ Difference per Car. £ 75. 16. 2 increase. Cost of Parts in Works which will be scrapped if commenced on:- Series...........£........... Series...........£........... Series...........£........... Signature of Mr. De LOOZE that above is correct. My/Rhs. 29.10.24. SIGNATURES | DATE | REMARKS MR. JOHNSON | 24.11.24 | Agreed, subject to satisfactory springs MR. B. JOHNSON | 25.11.24 | Agreed. BJ. MR. ROYCE | 16/7/24 | Agreed FHR MR. WORMALD | 15.7.24 | Agreed. Wor.{Arthur Wormald - General Works Manager} MR. ROWLEDGE | 16.7.24 | Agreed. Rg.{Mr Rowledge} MR. DAY | 17.7.24 | Agreed. Da.{Bernard Day - Chassis Design} MR. BAILEY | 15.7.24 | Disagree, consider Brakes on front wheels are wrong and likely to cause trouble. BY.{R.W. Bailey - Chief Engineer} MR. PLATFORD | 20.7.24 | Agreed as best available compromise to meet our obligations. Still contend customers will be dissatisfied with too sudden action. MR. ELLIOTT | 17/7/24 | Agreed AEB. Do not consider 10,000 miles tests report gives a clear lead. MR. NORTHEY | 4.9.24 | Agreed, subject to the front spring problem now under test, being satisfactorily dealt with. PN.{Mr Northey} MR. HIVES | | Agreed. E.Hives. | ||