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 proposal for a new four-wheel brake system with a 60/40 rear/front braking ratio.
Identifier | ExFiles\Box 73\3\ scan0249 | |
Date | 15th July 1924 | |
RR 755 (10H) (SL391 2-11-23) MP 281297 (Hs{Lord Ernest Hives - Chair}) X9940 Completed 26/11/24 STANDARDISATION of CHASSIS PARTS. Date 15.7.24. Description of Parts. FOUR WHEEL BRAKES. 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 46-PK, 44-PK, 9-PK and 93-NK - run total of 11,000 miles in England. Recommended for standardisation. Weight of Old Part. Cost of Old Part. £ Weight of New Part. Cost of New Part. £ Difference per Car. Difference per Car. £ 75. 16. 2 increase. Signature of Mr. De LOOZE that above is correct. My/Rns. 29.10.24. [Action Box] X No. 9940 Drawing No. Part List. 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. Cost of Parts in Works which will be scrapped if commenced on:- Series............£......... Series............£......... Series............£......... [Signatures Table] SIGNATURES | DATE | REMARKS MR. JOHNSON | 24 Nov | Agreed subject to satisfactory springs. MR. B. JOHNSON | 25.11.24 | Agreed. 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 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. EP.{G. Eric Platford - Chief Quality Engineer} MR. ELLIOTT | 17.7.24 | Agreed. E.{Mr Elliott - Chief Engineer} 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. | ||