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
Two cases of rivet failure in the balancing arm of the Spectre Servo mechanism.21th Jan 1935Box 92 \ 4  scan0051
Experimental department report on a 'sponge' feeling in the front brakes of a Spectre car.21th Jan 1935Box 92 \ 4  scan0052
Investigating the cause of poor braking performance and 'sponge' on the Spectre car brakes.21th Jan 1935Box 92 \ 4  scan0053
Graph showing the relative movement of the lever and cams for the Spectre front brakes with the drum in position.20th Jan 1935Box 92 \ 4  scan0054
Secret memorandum regarding self-locking issues and planned adjustments for the Spectre brakes.5th Feb 1935Box 92 \ 4  scan0055
Modifications to the Spectre Girling brakes, particularly concerning the handbrake operation and shoe fulcrums.11th Feb 1935Box 92 \ 4  scan0056
Modifications to the Spectre's Girling rear brake linkage and associated components.12th Feb 1935Box 92 \ 4  scan0057
Secret internal memo regarding modifications to the Spectre rear brakes.12th Feb 1935Box 92 \ 4  scan0058
Request for a delivery date for a Spectre front brake assembly incorporating new schemes.13th Feb 1935Box 92 \ 4  scan0059
Design and operation of Girling front brakes for the Spectre model, comparing two schematics.15th Feb 1935Box 92 \ 4  scan0060
Meeting minutes discussing brake system policy and designs for the Spectre project.19th Feb 1935Box 92 \ 4  scan0061
Meeting notes discussing modifications to the Spectre chassis, brakes, brake pedal, and clutch.19th Feb 1935Box 92 \ 4  scan0062
Modifications to clutch and brake pedal levers.19th Feb 1935Box 92 \ 4  scan0063
Secret memo regarding a modification to the cross steering lever for Spectre Girling Brakes.20th Feb 1935Box 92 \ 4  scan0064
The sponginess in the Spectre front brake adjustment mechanism.19th Feb 1935Box 92 \ 4  scan0065
Comparing original and later type Spectre front brake adjustment mechanisms.21th Feb 1935Box 92 \ 4  scan0066
Graph showing the relative movement of the lever and cams for the Spectre front brakes under different adjustments.19th Feb 1935Box 92 \ 4  scan0067
The Spectre's RR type front brakes with tangent screw adjustment, referencing an associated schematic.20th Feb 1935Box 92 \ 4  scan0068
The intermediate front brake lever (N.Sch.4386) for Spectre type brakes with tangent screw adjustment.22th Feb 1935Box 92 \ 4  scan0069
Diagram of semi-servo brake leverages for the Spectre model, including a proposed modification.22th Feb 1935Box 92 \ 4  scan0070
Modified operating levers and diagrams for the Spectre Girling Brakes.22th Feb 1935Box 92 \ 4  scan0071
Modification to the intermediate lever for Girling and Semi-servo brakes on the Spectre project.22th Feb 1935Box 92 \ 4  scan0072
List of designs for the revised braking system on the Spectre model.6th Mar 1935Box 92 \ 4  scan0073
Confirming the decision to prioritise the revised braking system for the Spectre, specifically for car No. 3.19th Mar 1935Box 92 \ 4  scan0074
Secret memo detailing modifications to the Spectre Hand Brake Intermediate Shaft.22th May 1935Box 92 \ 4  scan0075
Hand brake mechanism issue on the Spectre III and a proposed temporary solution.12th Jun 1935Box 92 \ 4  scan0076
Technical memo discussing brake judder on Spectre models and proposed solutions.13th Jun 1935Box 92 \ 4  scan0077
Secret memo regarding a modification to the rear brake linkage on the Spectre model.19th Jun 1935Box 92 \ 4  scan0078
To G.W. Hancock regarding brake and clutch adjustments for the Spectre vehicle.26th Jun 1935Box 92 \ 4  scan0079
Secret memorandum detailing a modification to the Spectre's hand brake linkage.28th Jun 1935Box 92 \ 4  scan0080
Clearance issues and potential modifications for the Spectre's horizontal hand brake lever.2nd Jul 1935Box 92 \ 4  scan0081
Secret memo regarding a half size layout of the Spectre rear brake linkage.3rd Jul 1935Box 92 \ 4  scan0082
Loss of travel issue with the horizontal hand brake lever for the Spectre model.8th Jul 1935Box 92 \ 4  scan0083
Proposal to modify the Spectre's front brake linkage following the fitment of a front roll bar.12th Jul 1935Box 92 \ 4  scan0084
Secret memo regarding the substitution of Oilite bushes for needle roller bearings on the Front Brake Actuating Lever for the Spectre frame.15th Aug 1935Box 92 \ 4  scan0085
Brake layout modifications for the 'Spectre' model's 2-S-I test in France.16th Aug 1935Box 92 \ 4  scan0086
Modification to the brake layout for model 2-S-I for France.17th Aug 1935Box 92 \ 4  scan0087
Secret memo detailing proposed modifications to the Spectre model's hand brake cables to prevent fraying.20th Aug 1935Box 92 \ 4  scan0088
Letter to Ferodo Limited regarding tests on composite brake drums and servo linings.12th Sep 1935Box 92 \ 4  scan0089
Technical discussion on the Phantom III hand brake, addressing issues and comparing performance with other models.19th Sep 1935Box 92 \ 4  scan0090
Note about altering the material of a shoe from aluminium to steel.19th Sep 1935Box 92 \ 4  scan0091
Outlining an alternative method to reduce the hand brake leverage for car 33-EX.21th Sep 1935Box 92 \ 4  scan0092
Design, cooling, and required alterations for Spectre brake drums.21th Sep 1935Box 92 \ 4  scan0093
On modifications to the Spectre hand brake linkage to reduce leverage and improve geometry.24th Sep 1935Box 92 \ 4  scan0094
Replacement of aluminum hand brake shoes with steel ones for the Phantom III.3rd Oct 1935Box 92 \ 4  scan0095
Proposal to trial oilite bushes in the Phantom III rear brake linkage instead of needle roller bearings.4th Oct 1935Box 92 \ 4  scan0096
Modifications to the Phantom III brake pedal due to reduced travel from carpets and bending under load.15th Oct 1935Box 92 \ 4  scan0097
Issues with automatic brake adjustment and proposing a new system seen on a Birmingham Bus Co. vehicle.16th Oct 1935Box 92 \ 4  scan0098
Blueprint diagram of an automatic brake adjustment mechanism.17th Oct 1935Box 92 \ 4  scan0099
Tests carried out on a Phantom III car (31-EX) to investigate brake pedal sponge.19th Oct 1935Box 92 \ 4  scan0100
Potential braking issues including pedal sponge, carpet interference, and a note on a handbrake fault on car 34-EX.6th Nov 1935Box 92 \ 4  scan0101
Particulars for a front brake pull-off spring for the Phantom III car.6th Nov 1935Box 92 \ 4  scan0102
Specification for a front brake pull off spring for the Phantom III model.7th Nov 1935Box 92 \ 4  scan0103
Dangerous Phantom III rear brake drum failure, attributing the cause to increased stress and recommending a new design with 4 ribs.7th Nov 1935Box 92 \ 4  scan0104
Alteration to the Phantom III horizontal hand brake lever position.8th Nov 1935Box 92 \ 4  scan0105
Failure of Phantom III rear brake drums and suggesting potential causes and design improvements.8th Nov 1935Box 92 \ 4  scan0106
Cause of failure in Phantom III rear brake drums and potential solutions.8th Nov 1935Box 92 \ 4  scan0107
Requesting to prevent placing large orders for Phantom III rear brake drum castings pending a decision on alterations.9th Nov 1935Box 92 \ 4  scan0108
Failure of Phantom III rear brake drums and proposing a design modification.11th Nov 1935Box 92 \ 4  scan0109
Issues with flexible rear brake drums on the Phantom III and a request to produce modified drums for testing.16th Nov 1935Box 92 \ 4  scan0110
Changing from aluminium to steel for hand brake shoes on the first 50 Phantom III cars due to seizing issues.18th Nov 1935Box 92 \ 4  scan0111
The seizure of Phantom III rear brakes, proposing changes to materials for spindles and end caps.19th Nov 1935Box 92 \ 4  scan0112
Investigation into brake fade on a Phantom III (35-EX), detailing pedal movement measurements and their causes.21th Nov 1935Box 92 \ 4  scan0113
Technical memorandum discussing brake pedal 'sponge', fading issues, and proposed solutions.21th Nov 1935Box 92 \ 4  scan0114
Brake system examination, detailing issues with the servo, drums, and linings, and proposing material changes.21th Nov 1935Box 92 \ 4  scan0115
Notification regarding a design change to the Phantom III rear brake drums to overcome distortion.26th Nov 1935Box 92 \ 4  scan0116
Brake pedal movement for the Phantom III, requesting modifications to the pedal stem.29th Nov 1935Box 92 \ 4  scan0117
The outdated brakes on car 30-EX, requesting an upgrade to the latest specification for development work.2nd Dec 1935Box 92 \ 4  scan0118
Design change for the Phantom III rear brake drums, instructing to machine castings to a new drawing, G. 84005.4th Dec 1935Box 92 \ 4  scan0119
Requesting the production of two sets of Oillite bushes for Phantom III Bell Cranks for experience gathering.4th Dec 1935Box 92 \ 4  scan0120
Partial rivet failure on Phantom III & Bentley steel brake shoes, with analysis and recommendations for a new material.11th Dec 1935Box 92 \ 4  scan0121
Trouble with unequal expansion of brake shoes and drums, and instructions to use experimental steel shoes with zinc bonded material.12th Dec 1935Box 92 \ 4  scan0122
Suggesting the substitution of strengthened front springs for the rear foot brake shoe springs on the Phantom III.2nd Jan 1936Box 92 \ 4  scan0123
The failure of Phantom III rear brake lining rivets due to heat, requesting tests on new special brass rivets.8th Jan 1936Box 92 \ 4  scan0124
List of brake experiments showing component status and car allocation.11th Jan 1936Box 92 \ 4  scan0125
Summary of brake system modifications, tests, and statuses for various vehicle models.11th Jan 1936Box 92 \ 4  scan0126
Seizures in the oiling scheme and brake gear for Bentley 20/25 and Phantom III models.4th Jan 1936Box 92 \ 4  scan0127
The addition of felt sealing washers to the bell crank lever needle bearings for the Phantom III rear brake operation.4th Jan 1936Box 92 \ 4  scan0128
Revised hand brake adjustment for the Phantom III, including a special spanner.4th Jan 1936Box 92 \ 4  scan0129
Issue with the front brakes engaging when the car is jacked up, preventing drum removal.17th Jan 1936Box 92 \ 4  scan0130
Issue with the Phantom III front brakes engaging during full rebound and proposed modifications.21th Jan 1936Box 92 \ 4  scan0131
Requesting a new brake lever for the Phantom III 32-EX to be fitted before its 10,000-mile test.21th Jan 1936Box 92 \ 4  scan0132
Modification of a sheet metal bracket for the Phantom III brake pedal.23th Jan 1936Box 92 \ 4  scan0133
Modified sheet metal bracket for the Phantom III brake pedal.23th Jan 1936Box 92 \ 4  scan0134
Two brake failures on a Phantom III model, requesting an investigation.27th Jan 1936Box 92 \ 4  scan0135
Instruction regarding the fitting of spring retaining rings for the Phantom III brake operation.28th Jan 1936Box 92 \ 4  scan0136
Phantom III brake issues, including seizing bearings and a push rod design flaw, and proposing modifications.28th Jan 1936Box 92 \ 4  scan0137
Potential modification to the bell crank and lever for the Phantom III brake mechanism.28th Jan 1936Box 92 \ 4  scan0138
The fitting of spring retaining rings for the Phantom III brake operation.28th Jan 1936Box 92 \ 4  scan0139
Response to a proposed cost-reduction scheme for the Phantom III hand brake equaliser.29th Jan 1936Box 92 \ 4  scan0140
Rear brake operation for the Phantom III model.31th Jan 1936Box 92 \ 4  scan0141
Cost reductions for the Phantom III Hand Brake Equaliser, specifically concerning needle bearings and acme threads.31th Jan 1936Box 92 \ 4  scan0142
Operation of the foot and hand rear brakes for the Phantom III model.31th Jan 1936Box 92 \ 4  scan0143
The order and fitting of brake drums for car 32-EX and material tests on 'Millenite' iron.31th Jan 1936Box 92 \ 4  scan0144
Modifications to the rear brake intermediate shaft for chassis with dropped front ends.10th Feb 1936Box 92 \ 4  scan0145
Requesting to fit lever Rm.46 to the 32-EX brakes on a car in the shop.11th Feb 1936Box 92 \ 4  scan0146
Modifications to the rear brakes of the Phantom III.12th Feb 1936Box 92 \ 4  scan0147
Design change for the Phantom III rear brake intermediate shaft.12th Feb 1936Box 92 \ 4  scan0148
Design change for the Phantom III rear brake intermediate shaft.12th Feb 1936Box 92 \ 4  scan0149
Requesting an order of Phantom III brake linings from Ferodo Ltd.24th Feb 1936Box 92 \ 4  scan0150


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