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
Torque estimations and recommendations for EAC.10 servo gears.13th Dec 1927Box 12 \ 5  05-page044
Arrangement of brake differentials, referencing schedule N.sch.2539 and gearbox mounting.2nd Feb 1928Box 12 \ 5  05-page045
Design and modification of the EAC.10 hand brake lever shaft and equaliser.2nd Feb 1928Box 12 \ 5  05-page046
Design of a rear brake compensating shaft.12th Mar 1928Box 12 \ 5  05-page047
Proposal for centralised chassis lubrication for the rear axle.17th Mar 1928Box 12 \ 5  05-page048
Design review memo on drawing N.sch.2551, highlighting issues with a lever offset and tool accessibility.2nd Apr 1928Box 12 \ 5  05-page049
Phantom brake testing actions agreed upon at a Derby conference.2nd May 1928Box 12 \ 5  05-page050
Required modifications for centralised chassis lubrication points.18th May 1928Box 12 \ 5  05-page051
Instructions regarding the fitting of an Enots nipple for lubrication, replacing the Bijur pump.23th May 1928Box 12 \ 5  05-page052
Centralised chassis lubrication for the brake differential and hand brake lever.23th May 1928Box 12 \ 5  05-page053
Standardisation document for rear brakes similar to the 20 HP model.2nd May 1928Box 12 \ 5  05-page054
Form for the standardisation of chassis parts, detailing the first chassis fitment, test date, and tooling costs.12th Nov 1928Box 12 \ 5  05-page055
Standardisation of brake linings for the 40/50 HP model to reduce squeaking.24th Aug 1928Box 12 \ 5  05-page056
Recommendation to modify the drain pipes on the Phantom's side-by-side rear brakes to prevent them from being choked by mud.9th Oct 1928Box 12 \ 5  05-page057
Instruction to use the attached damper sector on the first three SS brakes.13th Nov 1928Box 12 \ 5  05-page058
Instructions and diagram for fitting wooden plugs into brake shafts for rear axles.16th Nov 1928Box 12 \ 5  05-page059
Recommendation to adopt scheme N.sch.2746 for the drain on the side by side rear brakes.26th Nov 1928Box 12 \ 5  05-page060
Poor braking on car 18-EX, questioning if leverage changes were made.28th Dec 1928Box 12 \ 5  05-page061
Delay in brake effectiveness and a potential diagnosis for the issue.12th Jun 1928Box 12 \ 5  05-page062
Requesting modifications for 'SS' brakes on a 19-EX model.13th Dec 1928Box 12 \ 5  05-page063
Instruction to experimentally alter the 'SS' chassis brakes by fitting 30° servo cams and increasing the length of lever G.76811.17th Dec 1928Box 12 \ 5  05-page064
Query regarding the correct angle for the Phantom servo operating cams, seeking confirmation between 45° and 55°.18th Dec 1928Box 12 \ 5  05-page065
Requesting modifications to car 19-EX, concerning the engine feet, gearbox support, and brakes.19th Dec 1928Box 12 \ 5  05-page066
The cam angle used on the Phantom servo and brakes.22th Dec 1928Box 12 \ 5  05-page067
Issues with rear brakes filling with water, axle manufacturing variations, and proposed solutions.1st Jan 1929Box 12 \ 5  05-page068
The trial of aluminium castings for 'SS' model rear brakes as a cost-saving alternative to duralumin.7th Jan 1929Box 12 \ 5  05-page069
High cost of duralumin forged brake shoes and proposing a trial of aluminium castings for 'SS' rear brakes.7th Jan 1929Box 12 \ 5  05-page070
Issues with 'SS' brakes filling with water and mud, with proposals for design modifications.7th Jan 1929Box 12 \ 5  05-page071
Experimental reduction in the number of oil drain holes in the S.S. & Phantom rear brake drums.9th Jan 1929Box 12 \ 5  05-page072
Telegram discussing the disadvantages of increasing cam angle and proposing thirty-degree cams as a compromise.25th Jan 1929Box 12 \ 5  05-page073
Inquiry regarding the effectiveness of the rear brake mud shield on the Phantom model.19th Jan 1929Box 12 \ 5  05-page074
Investigation into the angle of servo cams and lever length on the 'SS' brake gear.27th Jan 1929Box 12 \ 5  05-page075
Performance issues with 'SS' Brakes, including poor proportioning, noise, and water ingress concerns.1st Feb 1929Box 12 \ 5  05-page076
Loss of oil pressure after braking, with proposals for testing and sump system modifications.7th Feb 1929Box 12 \ 5  05-page077
Comparison of oil suction systems and strainer designs between the SS, Phantom, and India chassis models.15th Feb 1929Box 12 \ 5  05-page078
Effect of braking on oil flow and potential solutions regarding filters and diaphragms.15th Feb 1929Box 12 \ 5  05-page079
Alterations to the S.S. rear brake camshafts and associated components.9th Feb 1929Box 12 \ 5  05-page080
Production of the 'SS' servo and brake mechanism and the material for servo linings.13th Mar 1929Box 12 \ 5  05-page081
Request for parts to be made for brake gear experiments as per sketches HS.210/211/212.13th Mar 1929Box 12 \ 5  05-page082
Clearance issue with the 'SS' brake cables.15th Mar 1929Box 12 \ 5  05-page083
Cover note explaining an instruction regarding SS cars was sent to Mr. Royce in error.20th Mar 1929Box 12 \ 5  05-page084
Clearance issue with the L.H. front brake cable and a proposed modification.15th Mar 1929Box 12 \ 5  05-page085
Request to modify the front brake equaliser shaft for the 12-EX model.3rd Apr 1929Box 12 \ 5  05-page086
Requesting different types of 'SS' brake linings for testing.4th Apr 1929Box 12 \ 5  05-page087
Letter to Mr. Hancock in France regarding a complaint of grabbing brakes and potential remedies.11th Apr 1929Box 12 \ 5  05-page088
Continued letter regarding the replacement of cotton duck liners with Ferodo liners and cams for braking system adjustments.15th Apr 1929Box 12 \ 5  05-page089
Letter discussing excessive front braking on 'SS' models and potential solutions involving servo efficiency and materials.15th Apr 1929Box 12 \ 5  05-page090
Brake lining materials, servo efficiency, and modifications to braking and steering components.15th Apr 1929Box 12 \ 5  05-page091
Page requesting a report on a side steering tube.16th Apr 1929Box 12 \ 5  05-page092
Programme of modifications for 'SS' braking systems, including new linings and other efficiency improvements.16th Apr 1929Box 12 \ 5  05-page093
Programme to modify 'SS' braking systems.16th Apr 1929Box 12 \ 5  05-page094
Internal instruction to order two complete sets of front and rear brake liners made from Ferodo bonded asbestos.17th Apr 1929Box 12 \ 5  05-page095
Confirming instructions to fit car 21-EX with specific brake leverage and servo cams.18th Apr 1929Box 12 \ 5  05-page096
Why the cross steering tube fouls the dampers under maximum braking.19th Apr 1929Box 12 \ 5  05-page097
Urgent request to order 4 pairs of woven cotton friction discs from 'The Halo people'.19th Apr 1929Box 12 \ 5  05-page098
Outlining the history of continuous tests and modifications to the 'SS' braking system.19th Apr 1929Box 12 \ 5  05-page099
Investigation into brake sponginess and squeaking, focusing on servo performance and lining efficiency.19th Apr 1929Box 12 \ 5  05-page100
Tests conducted on brake linkage efficiency and proposed improvements.19th Apr 1929Box 12 \ 5  05-page101
Development work for a braking system, including improvements to the rear brake equalising shaft and servo lining selection.19th Apr 1929Box 12 \ 5  05-page102
Design and potential issues of side-by-side rear brakes for the 'Phantom' chassis.19th Apr 1929Box 12 \ 5  05-page103
Correcting a typo in a previous communication and inquiring about brake squeak in a modified arrangement.22th Apr 1929Box 12 \ 5  05-page104
The preparation and manufacture of various brake system components for testing.1st Apr 1929Box 12 \ 5  05-page105
Instructions for testing modifications to a vehicle's braking system, including longer levers and new linings.25th Apr 1929Box 12 \ 5  05-page106
Tests for dry servo linings, brake cams, and comparisons of steering systems.25th Apr 1929Box 12 \ 5  05-page107
Instructions for testing pivot lean, toe-in, and damper loads on a new axle.1st May 1929Box 12 \ 5  05-page108
Recurring complaints of squeaking brakes and an engine oil leak on car 'SS' - 22-EX.1st May 1929Box 12 \ 5  05-page109
Remedies for squeaking, oil leaks, and starter motor failures on experimental cars.5th May 1929Box 12 \ 5  05-page110
Order for sets of non-impregnated wire brake linings and additional pieces.10th May 1929Box 12 \ 5  05-page111
Agreed brake arrangement for S.S. cars, with a diagram of lever dimensions.10th May 1929Box 12 \ 5  05-page112
Retention of experimental levers and cams for the S.S. braking system.16th May 1929Box 12 \ 5  05-page113
Final S.S. brake layout for a production chassis, including a dimensioned sketch and specifications for lining materials.5th May 1929Box 12 \ 5  05-page114
Altering car leverage to prevent squeaking front brakes and improve consistency.17th May 1929Box 12 \ 5  05-page115
Cause of squeaking front brakes and proposing a test for new flanged brake drums.28th May 1929Box 12 \ 5  05-page116
Improvements to S.S. Brakes and Servo action using a woven cotton disc lining.29th May 1929Box 12 \ 5  05-page117
Analysis of brake lining materials and alternative brake cam configurations to reduce wear and squeaks.29th May 1929Box 12 \ 5  05-page118
Issues with squeaking brakes, comparing Johns-Manville and Ferobestos linings, and referencing tests on a Phantom.29th May 1929Box 12 \ 5  05-page119
Test report on lubricated cotton duck linings for the 'SS' servo.29th May 1929Box 12 \ 5  05-page120
Arranging for investigation and a standard Phantom front axle changeover on the 21-EX car in France.29th Jun 1929Box 12 \ 5  05-page121
Letter detailing an investigation into a clanking noise produced by servo-operated brakes upon release.12th Jul 1929Box 12 \ 5  05-page122
Brake system adjustments, testing of Tee lever offsets, and suggestions for redesign.12th Jul 1929Box 12 \ 5  05-page123
Supplementary note discussing issues and improvements for a servo-brake mechanism, particularly regarding noise and action upon release.12th Jul 1929Box 12 \ 5  05-page124
Blueprint drawing of a Servo Crank, including two proposals for its operation.15th Jul 1929Box 12 \ 5  05-page125
Extract concerning an issue with groaning brakes on the S.S. chassis, a noise also found on experimental cars.8th Aug 1929Box 12 \ 5  05-page126
Urgent request for two custom-made brake drum rings to address an epidemic of brake squeaks.16th Aug 1929Box 12 \ 5  05-page127
Complaints and potential cures for a clanking noise in the brake mechanism upon pedal release.1st Oct 1929Box 12 \ 5  05-page128
Solutions for brake system issues, including fitting a stop to the equaliser shaft and using pads to reduce noise.2nd Oct 1929Box 12 \ 5  05-page129
Test report on a buffer stop applied to a servo balance lever to prevent clanking.2nd Oct 1929Box 12 \ 5  05-page130
Description of a damper's function within the brake mechanism.8th Oct 1929Box 12 \ 5  05-page131
Blueprint for a 20 HP front brake equalizing stop.8th Oct 1929Box 12 \ 5  05-page132
Blueprint of the front brake equalizer stop for a 20 HP model.5th Oct 1929Box 12 \ 5  05-page133
The clanking of the brake mechanism, referencing an attached print.5th Oct 1929Box 12 \ 5  05-page134
Study of a 'servo clank' issue in a braking linkage, comparing standard, experimental, and proposed designs.12th Nov 1928Box 12 \ 5  05-page135
Technical memo about issues with the Phantom II braking system, pedal movement, and servo gear clearances.24th Oct 1929Box 12 \ 5  05-page136
Outlining settings for buffer springs and servo brake systems on experimental cars.24th Oct 1929Box 12 \ 5  05-page137
Brake clearance issues and recommendations for the Phantom II model.24th Oct 1929Box 12 \ 5  05-page138
Specifications for buffer springs, servo brake clearance, and pedal/lever movement.24th Oct 1929Box 12 \ 5  05-page139
Brake pedal feel, leverage ratios, and clearance issues on the Phantom II.30th Oct 1929Box 12 \ 5  05-page140
Issues and proposed adjustments for the Phantom II braking system.5th Nov 1929Box 12 \ 5  05-page141
Reduction in pedal travel for the Phantom I and a warning to coachbuilders.5th Nov 1929Box 12 \ 5  05-page142
Graph showing rear brake lever movement due to road spring deflection.2nd Nov 1929Box 12 \ 5  05-page143


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