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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.
  
  


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