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
Testing E.A.C. servo brake shoes lined with cast iron.24th Jan 1924Box 30 \ 6  Scan163
Brakes road test, detailing issues with servo liner wear and friction.25th Jan 1924Box 30 \ 6  Scan164
Brake performance and wear, comparing 4-wheel braking to 2-wheel systems under severe road conditions.25th Jan 1924Box 30 \ 6  Scan165
Using cast iron to achieve a consistent servo brake and equal braking.26th Jan 1924Box 30 \ 6  Scan166
Test rig results for servo performance with Ferodo and cast iron liners.26th Jan 1924Box 30 \ 6  Scan167
Comparing brake performance with modified and standard leverages.26th Jan 1924Box 30 \ 6  Scan168
Letter from France discussing the development of slow speed servo brakes, conversion parts for the 40/50 model, and observations on competing designs.27th Jan 1924Box 30 \ 6  Scan169
Investigating the cause and cure for brake 'jaggers'.28th Jan 1924Box 30 \ 6  Scan170
Calculation comparing the unit pressure on the RR. servo shoes to the Hispano servo.12th Jul 1923Box 30 \ 6  Scan171
The suggested cause for the chattering of front brakes, including a force diagram.12th Jul 1923Box 30 \ 6  Scan172
Page detailing the periodic action of spring and friction forces, likely within a braking system.12th Jul 1923Box 30 \ 6  Scan173
40/50 HP car brake testing with cast iron liners and comparison with the Hispano servo.30th Jan 1924Box 30 \ 6  Scan174
Comparing the performance of Rolls-Royce and Hispano-Suiza cars.1st Feb 1924Box 30 \ 6  Scan175
Braking tests conducted in North Devon.12th Jul 1923Box 30 \ 6  Scan176
The hill-climbing performance of a 40/50 HP car in North Devon.1st Feb 1924Box 30 \ 6  Scan177
Hill climbing test results comparing a 40/50 HP chassis against a Hispano Suiza in North Devon.1st Feb 1924Box 30 \ 6  Scan178
Comparison of brake tests conducted in North Devon between the R.A.C. High Speed Servo and Hispano systems.1st Feb 1924Box 30 \ 6  Scan179
Slow-speed brake servo for a 40/50 car.1st Feb 1924Box 30 \ 6  Scan180
Modifications to the brakes, specifically the low speed servo and pedal pressure issues.11th Aug 1924Box 30 \ 6  Scan181
The performance and wear characteristics of jointed brake shoes.15th Feb 1924Box 30 \ 6  Scan182
Drawing illustrating wear on a wrapping shoe after testing.15th Feb 1924Box 30 \ 6  Scan183
The wear and efficiency of jointed brake shoes.15th Feb 1924Box 30 \ 6  Scan184
The co-efficient of static friction for Ferodo brake shoes.1st Feb 1924Box 30 \ 6  Scan185
Testing different brake servo friction materials and investigating pressure loss issues.2nd Feb 1924Box 30 \ 6  Scan186
Suggested improvements for the front brakes on the 40/50 HP car.23th Feb 1924Box 30 \ 6  Scan187
Issues with brake pivot nuts, carrier bolts, lubricator accessibility, and protection from mud and water.12th Jul 1923Box 30 \ 6  Scan188
Recommendation to increase the Brinell hardness of 40/50 HP rear brake drums due to issues with wear and scoring.2nd Jun 1924Box 30 \ 6  Scan189
Reduced ride comfort caused by fitting stiffer front springs.12th Jul 1923Box 30 \ 6  Scan190
Statement about the unacceptable impact on ride comfort caused by the addition of front brakes.7th Apr 1924Box 30 \ 6  Scan191
Secret memo discussing lag and sticking issues in an E.A.C. servo mechanism, comparing it to a Renault scheme.7th Apr 1924Box 30 \ 6  Scan192
Comparative analysis of the braking systems of Sunbeam and Bentley vehicles.17th Jun 1924Box 30 \ 6  Scan193
Technical memorandum discussing cam leverage in four-wheel brake systems.10th Oct 1924Box 30 \ 6  Scan194
Requesting to forward an enclosed letter about four-wheel brakes to Monsieur Henri Perrot.27th Nov 1924Box 30 \ 6  Scan195
Brake deceleration and efficiency tests on a 'Vermorel' car.23th Mar 1925Box 30 \ 6  Scan196
Test of a Ferodo strip, as used on Morris Cowley cars, to reduce brake squeaks.1st Apr 1925Box 30 \ 6  Scan197
Four-wheel braking and car control, discussing front axle rigidity and steering effects.7th Sep 1925Box 30 \ 6  Scan198
Calculations and experimental results for steering moments and the effect of single-wheel braking.12th Jun 1925Box 30 \ 6  Scan199
Analysis of steering behavior and axle torsion when a single front brake is applied.12th Jun 1925Box 30 \ 6  Scan200
Responding to General Motors' request for information regarding a front wheel brake design, referencing an Oldsmobile blueprint.8th Nov 1937Box 30 \ 6  Scan201
Front axle with brake, returning a drawing and part while noting design differences.9th Nov 1927Box 30 \ 6  Scan202
Cause of 'brake thumps' and proposing the experimental use of an oil dashpot.20th Aug 1932Box 30 \ 6  Scan203
Description of a semi-hydraulic brake system proposed for patent purposes.10th May 1932Box 30 \ 6  Scan204
Outlining a different scheme for hydraulically operated brakes.27th Oct 1932Box 30 \ 6  Scan205
Diagrams and patentable features for a hydraulic brake operation system.16th Nov 1932Box 30 \ 6  Scan206
Investigating a vacuum servo diagram for brake operation with a view to patenting.16th Nov 1932Box 30 \ 6  Scan207
Alternative method for an actuating cylinder with automatic adjustment for hydraulic brakes.16th Nov 1932Box 30 \ 6  Scan208
On the hydraulic operation of brakes, concerning a separate valve for replenishment and temperature-related expansion.17th Nov 1932Box 30 \ 6  Scan209
Brake layouts, front-to-rear braking ratios, and experiments on chassis J.III.12th Apr 1933Box 30 \ 6  Scan210
Series of diagrams and graphs analyzing brake system layouts and performance for various models.19th Jun 1933Box 30 \ 6  Scan211
Modification scheme to the axle control (Hs.1043) to fix 'brake jaggers' on the 1.J.3. chassis.19th Jun 1933Box 30 \ 6  Scan212
Blueprint for a modified axle control component, detailing spring specifications.10th Jun 1933Box 30 \ 6  Scan213
On tests investigating brake thumps on a 2.E.TV. chassis, concluding the oil dashpot was ineffective.4th Jul 1933Box 30 \ 6  Scan214
Undesirable weight increase due to switching from aluminium to steel brake shoes on a Bentley.25th Aug 1933Box 30 \ 6  Scan215
Design choice between forged steel and welded sheet metal for brake shoes.28th Aug 1933Box 30 \ 6  Scan216
Proposing a test to determine if aluminium brake shoes permanently increase in size when heated.27th Sep 1933Box 30 \ 6  Scan217
Blueprint showing the arrangement of a spring balance for servo tests.13th Oct 1933Box 30 \ 6  Scan218
Recommended cures for inefficient brakes, focusing on oil contamination of the servo and experiments with new linings.12th Oct 1935Box 30 \ 6  Scan219
Technical memo detailing a method for testing inefficient brakes by measuring servo output with spring balances.12th Oct 1933Box 30 \ 6  Scan220
Table of input and output figures for efficient servos on various chassis models.12th Oct 1933Box 30 \ 6  Scan221
Front brake clearances and adjustments, comparing the current system to the Bentley layout for the 20/25 model.19th Oct 1933Box 30 \ 6  Scan222
The distortion of aluminium brake shoes after two stages of heat treatment.19th Oct 1933Box 30 \ 6  Scan223
Tests on brake straps to reduce seizures by heat-treating the shoe castings.27th Oct 1933Box 30 \ 6  Scan224
Experiments conducted to resolve 'brake thumps' by modifying the braking system.7th Nov 1933Box 30 \ 6  Scan225
Sample of heat-resisting enamel for exhaust manifolds.6th Nov 1931Box 31 \ 1  Scan001
Testing heat-resisting enamel for exhaust manifolds.11th Nov 1931Box 31 \ 1  Scan002
The despatch of a Phantom II Manifold for heat-resisting enamel treatment after a sample proved successful.11th Nov 1931Box 31 \ 1  Scan003
Despatch note for an exhaust manifold suitable for a 40/50 HP chassis to be sent to The Enamelled Iron & Steel Products Ltd.12th Nov 1931Box 31 \ 1  Scan004
Inability of the Pyrene Co. to parkerise exhaust pipes due to equipment size limitations.17th Dec 1931Box 31 \ 1  Scan005
Use of the Cosletizing process for treating replacement silencers to gather data on corrosion prevention.1st Jan 1932Box 31 \ 1  Scan006
Comparing the effectiveness of Parkerizing versus Coslettizing treatments for exhaust pipes.6th Jan 1932Box 31 \ 1  Scan007
Cost comparison and potential standardisation of lagging clips for exhaust pipes.18th Nov 1933Box 31 \ 1  Scan008
Switch to 'Jubilee' type lagging clips for exhaust pipes on 20/25 and 40/50 HP chassis.20th Nov 1933Box 31 \ 1  Scan009
Replacement of Staybrite clips with Jubilee clips on the exhaust pipes for the 20/25 and 40/50 HP chassis.23th Nov 1933Box 31 \ 1  Scan010
Comparison of stiffness, weight, and features for a new S.S. crankshaft with large pins against standard shafts.29th Aug 1929Box 31 \ 1  Scan011
Meeting about fitting a Scott Self Starter, including weights and performance data.6th Dec 1913Box 31 \ 1  Scan012
Starter motor and dynamo applications, including details on a 20 HP Crossley gear and voltage regulation.6th Dec 1913Box 31 \ 1  Scan013
Starter trial from 'the Scott people', chain dimensions, and component approvals.19th Feb 1920Box 31 \ 1  Scan014
Inquiry regarding the 'Bijur' electric lighting set sold by Duncan Watson & Co of London.28th Jan 1914Box 31 \ 1  Scan015
Mr. Royce regarding noise and contact materials of various dynamo regulators, with a reply from the works.3rd Apr 1914Box 31 \ 1  Scan016
The performance and noise levels of various dynamo regulators.6th Apr 1914Box 31 \ 1  Scan017
Instructions for experiments on Bijur and Bosch dynamos.24th Oct 1914Box 31 \ 1  Scan018
The dissatisfaction with a sample Lucas dynamo and the proposal to use a 'Bijur' set as a replacement for testing.29th Jan 1918Box 31 \ 1  Scan019
Potential use and modification of a Bijur dynamo and regulator for a 12-volt system.30th Jan 1918Box 31 \ 1  Scan020
Modifying electrical circuit resistance for a 12-volt battery system.30th Jan 1918Box 31 \ 1  Scan021
Dynamo proposition from Messrs. Newton Bros. for the first 1000 chassis.10th Dec 1918Box 31 \ 1  Scan022
Extract discussing an instrument board clock and switch, a sample being sent, and a comparison of voltage schemes.15th Jan 1919Box 31 \ 1  Scan023
Adopting a 12-volt constant voltage lighting system for the 40/50 chassis.17th Jan 1919Box 31 \ 1  Scan024
Extract detailing a preference for the Bijur scheme of control for dynamos on the chassis.17th Jan 1919Box 31 \ 1  Scan025
Letter detailing specifications for a Dynamo/Generator supplied by Remy to the Stearns Company.17th Feb 1919Box 31 \ 1  Scan026
Continuation page of a letter from a consulting engineer regarding an automatic temperature-dependent control for a generator.26th Feb 1919Box 31 \ 1  Scan027
Modification of a Bijur dynamo's regulator and considering a new shunt wound dynamo design.26th Feb 1919Box 31 \ 1  Scan028
Page discussing a trial regulator design and the planned testing of new C.A.V. N;G.R.R. type dynamos.26th Feb 1919Box 31 \ 1  Scan029
Letter responding to a proposal for dynamo control, discussing thermostatic vs voltage regulation methods.5th Mar 1919Box 31 \ 1  Scan030
The concluding page of a letter apologising for a delay in reply.5th Mar 1919Box 31 \ 1  Scan031
Letter from a consulting engineer regarding a generator and thermostat control for a chassis, also mentioning an influenza epidemic.6th Mar 1919Box 31 \ 1  Scan032
Letter from The British Thomson-Houston Co. Ltd. requesting specifications for a car lighting generator design.13th Mar 1919Box 31 \ 1  Scan033
Letter outlining the requirements and specifications for a car lighting dynamo.14th Mar 1919Box 31 \ 1  Scan034
The concluding page of a letter addressing a customer's requirements.14th Mar 1919Box 31 \ 1  Scan035
Letter from The British Thomson-Houston Co. Ltd. regarding a dynamo for car lighting.15th Mar 1919Box 31 \ 1  Scan036
Replacing a Packard dynamo with a Bijur dynamo and issues with the engine's 'hit and miss' governor.15th Apr 1919Box 31 \ 1  Scan037


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