Rolls-Royce Archives
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).
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DescriptionDateIdentifier
Graph plotting brake lining temperature against distance for a 3 1/2 Litre Bentley.4th Mar 1936Box 85 \ 1  scan0037
The ongoing issue of brake squeaks on Bentley cars and potential solutions.4th Mar 1936Box 85 \ 1  scan0039
Customer complaints of Bentley brake squeaks and preparing a test set of new brake shoes.4th Mar 1936Box 85 \ 1  scan0040
Concerns about overloaded brakes on the 4 1/4-litre Bentley and the potential use of aluminium drums with helical ribs.9th Mar 1936Box 85 \ 1  scan0041
The overheating of Bentley brake drums and a proposed modification to increase the front drum rib diameter.10th Mar 1936Box 85 \ 1  scan0042
Comparing the brake efficiency of Rolls Royce and Bentley cars against competitors, based on a 'The Motor' road test.12th Mar 1936Box 85 \ 1  scan0043
Cost estimate for machining Bentley front brake drums to altered dimensions.13th Mar 1936Box 85 \ 1  scan0044
Efficiency of brakes on R.R. and Bentley cars, proposing the use of a Tapley brake meter for testing.13th Mar 1936Box 85 \ 1  scan0045
High-speed judders on Bentley brakes, attributing them to the inertia of the brake adjusters and proposing a redesign.14th Mar 1936Box 85 \ 1  scan0046
The performance of Bentley brakes, addressing overload claims, test runs, and potential improvements.16th Mar 1936Box 85 \ 1  scan0047
Practical solution for cooling a brake drum using a pressed metal fan.17th Mar 1936Box 85 \ 1  scan0048
Comparison of specifications for different Bentley front brake drums, detailing part numbers, cooling areas, and temperatures.17th Mar 1936Box 85 \ 1  scan0049
Brake judders on a Bentley, with instructions to reverse the front brake mechanism.20th Mar 1936Box 85 \ 1  scan0050
Design and prototyping of a sheet metal brake drum cooling fan for a Bentley.20th Feb 1936Box 85 \ 1  scan0051
Inefficient brakes on Bentley trials cars when wet, specifically asking about 'wet brake jaggers'.24th Mar 1936Box 85 \ 1  scan0052
Design choices for the Wraith model's brakes, specifically rear shoe configuration and drum material.27th Mar 1936Box 85 \ 1  scan0053
Technical memo discussing brake system options, drum temperatures, and recommendations for the Wraith model.27th Mar 1936Box 85 \ 1  scan0054
Ongoing work to solve 'brake jagger' issues on Bentley brakes.28th Mar 1936Box 85 \ 1  scan0055
Inquiring about the progress of an investigation into the 'jagger' of Bentley Brakes.26th Mar 1936Box 85 \ 1  scan0056
Change in brake lining for Bentley cars from Ferodo M.R. to Ferodo S.5805.30th Mar 1936Box 85 \ 1  scan0057
Requesting an urgent test of a new scheme to prevent brake judder on a Bentley vehicle.30th Mar 1936Box 85 \ 1  scan0058
Instructing to hold orders of Millenite brake drums due to a potential material change for Bentley models.2nd Apr 1936Box 85 \ 1  scan0059
Requesting alterations to the tracings for aluminium brake drums after fitment issues on car 3-B-IV.2nd Apr 1936Box 85 \ 1  scan0060
Request to shrink a Brimol liner into a racing-type aluminium rear drum for testing.2nd Apr 1936Box 85 \ 1  scan0061
Request to manufacture a set of 4 front aluminium brake shoes to replace standard shoes on vehicle 3-B-IV.6th Apr 1936Box 85 \ 1  scan0062
Quotations for Brake Drum Castings from Wm. Mills & Company Ltd.4th Apr 1936Box 85 \ 1  scan0063
Price quotations from the British Piston Ring Co. for brake drum liners and castings.10th Mar 1936Box 85 \ 1  scan0064
The arrangement for Cornercroft to send five unpainted brake discs for a Bentley to the Experimental Department.7th Apr 1936Box 85 \ 1  scan0065
Request for a set of wheel discs for a Bentley to test the effect on brake temperatures.7th Apr 1936Box 85 \ 1  scan0066
Required repairs and modifications for two test cars following brake judder experiments.7th Apr 1936Box 85 \ 1  scan0067
Improved and simplified design for a Bentley Water Excluder.7th Apr 1936Box 85 \ 1  scan0068
Device to prevent 'brake jaggers' on a Bentley, in relation to using aluminium brake drums at Le Mans.8th Apr 1936Box 85 \ 1  scan0069
Comparison table of brake drum types, their maximum attainable temperatures, and their effect on car weight.16th Apr 1936Box 85 \ 1  scan0070
Complaint regarding the brakes on a 4¼-Litre Bentley after a trip to Monte Carlo.16th Apr 1936Box 85 \ 1  scan0071
Standardisation of parts for front brake drums with increased rib height on the 4 1/4 litre Bentley.12th Mar 1936Box 85 \ 1  scan0072
Production note regarding the manufacture of drums from 800 existing castings for the 'H' series.20th Apr 1936Box 85 \ 1  scan0073
Design for Bentley front brakes, focusing on aluminium drums to eliminate judder and squeaks.20th Apr 1936Box 85 \ 1  scan0074
Proposed modifications for a joint and brake operating mechanism.20th Apr 1936Box 85 \ 1  scan0075
Design and fitting alterations for aluminium rear brake drums on Bentley cars.20th Apr 1936Box 85 \ 1  scan0076
Alterations to aluminium brake drums for the back brakes of Bentley cars.20th Apr 1936Box 85 \ 1  scan0077
Design for die-cast aluminium front brake drums for Bentleys, discussing materials, dimensions, and testing.20th Apr 1936Box 85 \ 1  scan0078
Recommended modifications for a joint and brake operating mechanism.22th Apr 1936Box 85 \ 1  scan0079
Instruction to hold all work on Bentley 14' Brake Drums as they have been superseded by 12' aluminium drums.22th Apr 1936Box 85 \ 1  scan0080
Urgent internal order request for six 'Brimol' Austenitic Brake Drum Liners for Bentley.23th Apr 1936Box 85 \ 1  scan0081
Letter to Ferodo Ltd. regarding the lining of Bentley brake shoes with Ferodo 6077 material.24th Apr 1936Box 85 \ 1  scan0082
Material for locking pieces in Bentley aluminium brake drums to prevent liners from turning.24th Apr 1936Box 85 \ 1  scan0083
The production of aluminium brake drums and linkage for a 4 1/2 litre Bentley.1st May 1936Box 85 \ 1  scan0084
Design of aluminium brake drums, particularly concerning water excluders and dust covers.4th May 1936Box 85 \ 1  scan0085
The interference fit and materials for 12-inch brake drum liners.4th May 1936Box 85 \ 1  scan0086
Seized brake actuating shafts and a dry brake mechanism on chassis B.117.EJ, due to mud and water ingress.29th Apr 1936Box 85 \ 1  scan0087
Brake drum temperature chart from a 'Hands Hopton via Gelia' test run on a 4 1/4 Litre Bentley 3 B IV.29th Apr 1936Box 85 \ 1  scan0088
Chart of brake drum temperatures against miles driven for a 4¼ Litre Bentley during a 'Royal Red Gate Run'.5th May 1936Box 85 \ 1  scan0089
Urgent instruction to replace a loose liner in an aluminium drum with a new Brimol liner.5th May 1936Box 85 \ 1  scan0090
Modifications to the front braking system to prevent jaggers and improve stopping distance.10th May 1936Box 85 \ 1  scan0091
Heat treatment procedure for aluminium brake drums to prevent shrinkage.13th May 1936Box 85 \ 1  scan0092
Request to test the reserve strength of EX. aluminium brake drums by fitting a millenite liner.28th May 1936Box 85 \ 1  scan0093
Instructions for manufacturing and testing three types of front aluminium brake drums with different liners and interference fits.28th May 1936Box 85 \ 1  scan0094
Confirming the decision to halt ordering material following experiments on Bentley aluminium drums and altered leverage.29th May 1936Box 85 \ 1  scan0095
Failure of experimental aluminium brake drums and axle jaggers on Mr. Raymond Mays' 4¼ litre Bentley.6th Jun 1936Box 85 \ 1  scan0096
The urgent modification of Anti-Jagger brake parts for a customer's 4.25 litre car.6th Jun 1936Box 85 \ 1  scan0097
Experiments to resolve Bentley brake judders.8th Jun 1936Box 85 \ 1  scan0098
Modifications to the Bentley front brake adjustment mechanism to eliminate judders.9th Jun 1936Box 85 \ 1  scan0099
Urgent request to The Bowden Brake Co. Ltd. for front brake Bowden cables for a Bentley car.9th Jun 1936Box 85 \ 1  scan0100
Requesting conclusions and recommendations for an axle examination related to brake judder.11th Jun 1936Box 85 \ 1  scan0101
Instruction memo for 'Judder Experiments' involving the swapping of front axles between vehicles.12th Jun 1936Box 85 \ 1  scan0102
Alteration of the front brakes bedding on chassis B-80-GA for a client named Chubb.13th Jun 1936Box 85 \ 1  scan0103
Axle jagger issues on Bentley cars, including experimental work and potential solutions.15th Jun 1936Box 85 \ 1  scan0104
Recommending modifications to Bentley Trials cars to address brake squeaks.15th Jun 1936Box 85 \ 1  scan0105
Modification to reduce front brake judder on Bentley cars by removing portions of the brake shoe lining.13th Jun 1936Box 85 \ 1  scan0106
Technical drawing for an Auxiliary Shoe to be cut from part G.100296.3rd Nov 1931Box 85 \ 1  scan0107
Blueprint of a machined arc-shaped component with various sections and dimensions.15th Jun 1936Box 85 \ 1  scan0108
Confirming agreement on a slight modification to the front brakes.15th Jun 1936Box 85 \ 1  scan0109
Experiments conducted to address brake judder issues on a Bentley.16th Jun 1936Box 85 \ 1  scan0110
Remedy for brake judders on a Bentley Coupe Trials car.16th Jun 1936Box 85 \ 1  scan0111
Customer complaint regarding a Bentley and proposed vehicle modifications.16th Jun 1936Box 85 \ 1  scan0112
Experiments to eliminate Bentley brake judders by balancing the inertia of the toggle shaft.18th Jun 1936Box 85 \ 1  scan0113
Calculations for the moment of inertia of a Bentley front brake toggle shaft and adjustment mechanism.18th Jun 1936Box 85 \ 1  scan0114
Blueprint detailing modifications to brake adjusters and clearance for a type wing stay on a Bentley.17th Jun 1936Box 85 \ 1  scan0115
Issue of front wheels locking on Bentley cars during braking and inquiring about a potential cure.19th Jun 1936Box 85 \ 1  scan0116
Brake judders on a Bentley, arranging for parts to be made available.20th Jun 1936Box 85 \ 1  scan0117
Brake judder situation on a 4 1/4-litre Bentley vehicle.22th Jun 1936Box 85 \ 1  scan0118
Immediate actions to resolve judder issues with Bentley brakes.25th Jun 1936Box 85 \ 1  scan0119
Requesting the assembly of brake drums and steering levers for a Bentley fitted with Girling brakes.26th Jun 1936Box 85 \ 1  scan0120
On experiments to resolve Bentley brake judders, detailing a successful solution and the discontinuation of another test.29th Jun 1936Box 85 \ 1  scan0121
Query clarifying the model requirements (4¼ litre vs 3½ litre) for a list of 12 Bentley owners to investigate brake judders.29th Jun 1936Box 85 \ 1  scan0122
Proposing the circulation of a depot sheet regarding Bentley front axle control and brake jaggers.30th Jun 1936Box 85 \ 1  scan0123
Depot sheet concerning Bentley Axle Control, wear issues in triangular links, and required maintenance.30th Jun 1936Box 85 \ 1  scan0124
Policy for fitting an anti-judder scheme to 3½ litre Bentley cars.30th Jun 1936Box 85 \ 1  scan0125
Cost estimate for a spring-loaded axle control scheme on a Bentley.22th Jun 1936Box 85 \ 1  scan0126
The testing and application of a solution for Bentley brake judder.30th Jun 1936Box 85 \ 1  scan0127
Confirmation memo regarding prints for Bentley front brake inertia balancer actuating levers.1st Jul 1936Box 85 \ 1  scan0128
Experiments on a Bentley front axle and a request to build a complete set of parts for a new scheme.1st Jul 1936Box 85 \ 1  scan0129
New scheme for the adjusting mechanism on the front brakes to cure 'Bentley Brake Jaggers'.1st Jul 1936Box 85 \ 1  scan0130
Confirming prints for Bentley Front Brake Inertia Balancer levers have been supplied, with a material suggestion.1st Jul 1936Box 85 \ 1  scan0131
Front brake inertia balancer for Bentley cars, designed to eliminate high-speed judders.1st Jul 1936Box 85 \ 1  scan0132
Internal memorandum concerning wear on Bentley front axle control anchorages and proposed actions.1st Jul 1936Box 85 \ 1  scan0133
Confirmation of handing over print GB.2328 for the Bentley Front Brake Inertia Balancer pattern.1st Jul 1936Box 85 \ 1  scan0134
Scheme to test a Bentley Anti-Judder Device, including a list of required parts.3rd Jul 1936Box 85 \ 1  scan0135
Urgent testing of parts machined from solid for a Bentley brake judder issue.30th Jun 1936Box 85 \ 1  scan0136
Requesting details for a modification to a Bentley chassis to fix front brake judders.8th Jul 1936Box 85 \ 1  scan0137


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