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
The 10,000-mile bench test for Tungsten Ignition Contact Points.5th Nov 1927West Wittering \ R \ 2October1927-November-1927  111
The trial of a return spring in the steering column, assessing its impact on self-centering and steering weight.7th Nov 1927West Wittering \ R \ 2October1927-November-1927  112
Reporting on the results of 10,000-mile bench tests on tungsten ignition contact points.7th Nov 1927West Wittering \ R \ 2October1927-November-1927  113
Continued note on the effects of distributor and rotor types on contact point performance and corrosion.11th Nov 1927West Wittering \ R \ 2October1927-November-1927  114
The performance of a Watford Sleeveless Magneto Type EW6, including a tester's comparison to other models.7th Nov 1927West Wittering \ R \ 2October1927-November-1927  115
Continuation of a report on machine improvements, focusing on reduced operational force, better response, and less noise.7th Nov 1927West Wittering \ R \ 2October1927-November-1927  116
Investigations into a 20 HP starter's multiple clutch performance using different spring and disc materials.11th Nov 1927West Wittering \ R \ 2October1927-November-1927  117
Report page discussing lubricating scheme tests and the best performing oil.1st Nov 1927West Wittering \ R \ 2October1927-November-1927  118
Investigation into increased initial friction in the pinion unit of a 20 HP starter motor.1st Nov 1927West Wittering \ R \ 2October1927-November-1927  119
Investigation into different types of starter stops to prevent sticking, recommending the circumferential teeth type for standardization.1st Nov 1927West Wittering \ R \ 2October1927-November-1927  120
Road tests and recommendations for an improved steering geometry on the 20HP model.8th Nov 1927West Wittering \ R \ 2October1927-November-1927  121
Axle weight calculations, adding inadvertently omitted components like the universal joint and spare wheel carrier.8th Nov 1927West Wittering \ R \ 2October1927-November-1927  122
Rear axle control weight and the performance of cantilever springs.8th Nov 1927West Wittering \ R \ 2October1927-November-1927  123
Recommending a new engine suspension scheme to improve car smoothness and reduce vibration, referencing the 10-EX car.11th Nov 1927West Wittering \ R \ 2October1927-November-1927  124
Test on a new engine suspension system with Hardy couplings to reduce vibration.1st Nov 1927West Wittering \ R \ 2October1927-November-1927  125
Blueprint of the rear engine mounting for the 10EX model, showing a Hardy rubber-fabric coupling.8th Nov 1927West Wittering \ R \ 2October1927-November-1927  126
Heavily faded document, likely a carbon copy, with a receiving stamp in the bottom right corner.8th Nov 1927West Wittering \ R \ 2October1927-November-1927  127
Quoting a letter about ignition coils, comparing those with and without ballast resistance and armored casings.9th Nov 1927West Wittering \ R \ 2October1927-November-1927  128
The use and performance of fusible sentinels for monitoring dynamo temperature.10th Nov 1927West Wittering \ R \ 2October1927-November-1927  129
The successful bench test and construction of a new auto switch for reducing charging current.11th Nov 1927West Wittering \ R \ 2October1927-November-1927  130
Improvements to the dynamo charging system and regulator action.11th Nov 1927West Wittering \ R \ 2October1927-November-1927  131
The electrical design of connecting a cutout shunt and an auto switch.11th Nov 1927West Wittering \ R \ 2October1927-November-1927  132
Vibration issues with the auto-switch and dynamo cutout due to high resistance and proposing connection alterations.11th Nov 1927West Wittering \ R \ 2October1927-November-1927  133
The vibration of the auto switch and cutout under various speed and load conditions.11th Nov 1927West Wittering \ R \ 2October1927-November-1927  134
Analysis of the advantages and disadvantages of using a very high resistance in an auto-switch circuit.11th Nov 1927West Wittering \ R \ 2October1927-November-1927  135
Continued analysis of an auto-switch arrangement, comparing it with the Midgley type regarding the lighting circuit and potential patent avoidance.11th Nov 1927West Wittering \ R \ 2October1927-November-1927  136
Typed memorandum detailing design considerations for an electrical system's resistance and contacts.14th Nov 1927West Wittering \ R \ 2October1927-November-1927  137
Parts to be standardized and fitted to a Phantom car during a 10,000-mile test in France.14th Nov 1927West Wittering \ R \ 2October1927-November-1927  138
List of continued modifications and the proposal to test the 12-EX car in France.14th Nov 1927West Wittering \ R \ 2October1927-November-1927  139
Preparation and modifications for a 20 HP car undergoing a 10,000 miles test in France.14th Nov 1927West Wittering \ R \ 2October1927-November-1927  140
Tests conducted on hydraulic shock dampers to improve car riding stability and control.16th Nov 1927West Wittering \ R \ 2October1927-November-1927  141
Shock damper testing, development and performance on various car models.16th Nov 1927West Wittering \ R \ 2October1927-November-1927  142
Page discussing suspension performance, comparing the semi-elliptic springs on the 14-EX experimental car to the standard 40/50 HP.16th Nov 1927West Wittering \ R \ 2October1927-November-1927  143
Report comparing the ride quality of a 14-EX car with standard versus higher velocity pressure rear shock dampers.16th Nov 1927West Wittering \ R \ 2October1927-November-1927  144
Performance graph and cross-section diagram for a damper lever and piston assembly.16th Nov 1927West Wittering \ R \ 2October1927-November-1927  145
Blank page with a print room stamp.16th Nov 1927West Wittering \ R \ 2October1927-November-1927  146
Series of graphs analysing oil pressure, viscosity, and temperature characteristics under various conditions.16th Nov 1927West Wittering \ R \ 2October1927-November-1927  147
Page of faded, illegible typewritten text with a red stamp from the Print Room in Derby.16th Nov 1927West Wittering \ R \ 2October1927-November-1927  148
Investigation into the effect of headlamp load on the electrical system's auto switch, proposing the removal of the series coil.17th Nov 1927West Wittering \ R \ 2October1927-November-1927  149
Continued discussion on the design and differences of an auto switch compared to the Midgley patent.17th Nov 1927West Wittering \ R \ 2October1927-November-1927  150
Comparison between a new design of vibrator regulator and the Bijur type.11th Nov 1927West Wittering \ R \ 2October1927-November-1927  151
The operation and installation of an automatic electrical switch for a vehicle's lighting and charging system.11th Nov 1927West Wittering \ R \ 2October1927-November-1927  152
Test report comparing the power output and noise of a new single downpipe exhaust system for the Phantom model against the standard system.11th Nov 1927West Wittering \ R \ 2October1927-November-1927  153
Continued memorandum discussing experiments on a hot spot valve and investigations into exhaust system power differences.11th Nov 1927West Wittering \ R \ 2October1927-November-1927  154
Performance graph for a single outlet exhaust manifold on a Phantom Engine, comparing different exhaust system configurations.21th Nov 1927West Wittering \ R \ 2October1927-November-1927  155
Blank document page with a date stamp in the bottom right corner.21th Nov 1927West Wittering \ R \ 2October1927-November-1927  156
Graph comparing Brake Horse Power vs RPM for a standard exhaust system and a single outlet exhaust manifold with the cutout open.21th Nov 1927West Wittering \ R \ 2October1927-November-1927  157
Mostly blank page with a red 'Patent Room' stamp.21th Nov 1927West Wittering \ R \ 2October1927-November-1927  158
The successful testing and modification of a 20 HP starter motor's multiple clutch system.23th Nov 1927West Wittering \ R \ 2October1927-November-1927  159
Test report comparing loads and torque for cork and Ferobestos clutch discs under varying oil and wear conditions.23th Nov 1927West Wittering \ R \ 2October1927-November-1927  160
Test results and modifications for a clutch assembly and starter motor.23th Nov 1927West Wittering \ R \ 2October1927-November-1927  161
Exhaustive tests for two schemes related to the 20 HP Starter Motor, which were not justified for adoption.23th Nov 1927West Wittering \ R \ 2October1927-November-1927  162
Continued report page detailing the investigation into clutch slipping and the performance of a specific clutch spring on a test rig.24th Nov 1927West Wittering \ R \ 2October1927-November-1927  163
Experiments and improvements to a car's steering system, specifically the pendulum lever.24th Nov 1927West Wittering \ R \ 2October1927-November-1927  164
Carburettor tests and methods for maintaining power at high rotative speeds for the Sports Phantom.24th Nov 1927West Wittering \ R \ 2October1927-November-1927  165
Experiments comparing gas velocities and valve configurations for the 20 HP and Phantom engines.24th Nov 1927West Wittering \ R \ 2October1927-November-1927  166
Camshaft experiments and the factors required for high power maintenance at high rotational speeds.21th Jan 1927West Wittering \ R \ 2October1927-November-1927  167
Performance graph showing the power increase on a Phantom engine using a low depression carburettor.21th Jan 1927West Wittering \ R \ 2October1927-November-1927  168
Blank page with a red date stamp in the bottom right corner.24th Nov 1927West Wittering \ R \ 2October1927-November-1927  169
Graph showing the estimated power increase with reduced induction pipe depression relative to the standard Phantom carburettor.12th Oct 1927West Wittering \ R \ 2October1927-November-1927  170
Graph plotting gas velocity past valves against engine RPM for three different engine models.26th May 1927West Wittering \ R \ 2October1927-November-1927  171
Graph showing the effect of large valves and long duration cams on power output for a 20 HP engine.26th May 1927West Wittering \ R \ 2October1927-November-1927  172
Blueprint showing the results of Phantom camshaft experiments, comparing performance with different timing diagrams.8th Nov 1927West Wittering \ R \ 2October1927-November-1927  173
Graph of the estimated power output of a Phantom engine with a constant induction pipe depression.21th Nov 1927West Wittering \ R \ 2October1927-November-1927  174
The reverse side of a document, mostly blank except for a date stamp.24th Nov 1927West Wittering \ R \ 2October1927-November-1927  175
Results of tests on tungsten ignition contact points.24th Nov 1927West Wittering \ R \ 2October1927-November-1927  176
Experimental testing plan for an apparatus with four specific modifications.24th Nov 1927West Wittering \ R \ 2October1927-November-1927  177
Results and procedure for a component test.26th Nov 1927West Wittering \ R \ 2October1927-November-1927  178
Report comparing two sequence starter schemes (No.1 and No.2A) and their performance regarding jamming.26th Nov 1927West Wittering \ R \ 2October1927-November-1927  179
The design and performance of gear teeth in an apparatus, focusing on function, noisiness, and potential improvements.12th Oct 1927West Wittering \ R \ 2October1927-November-1927  180
Continued page discussing an experiment on reducing gear noise using parallel and helical teeth.29th Nov 1927West Wittering \ R \ 2October1927-November-1927  181
10,000-mile bench test of Tungsten Ignition Contact Points and plans for further experiments.29th Nov 1927West Wittering \ R \ 2October1927-November-1927  182
Results of bench tests on an auto switch's behavior without a series coil.30th Nov 1927West Wittering \ R \ 2October1927-November-1927  183
Functionality, fault protection, and experimental development of a dynamo charging system and auto switch unit.30th Nov 1927West Wittering \ R \ 2October1927-November-1927  184
Proposed design variations for a distribution box and its electrical connections.21th Nov 1927West Wittering \ R \ 2October1927-November-1927  185
Wiring diagram for a distribution board with a cut-out and auto switch.21th Nov 1927West Wittering \ R \ 2October1927-November-1927  186
Description of the control circuits for a Super Sports Sequence Starter from 1928.9th Jan 1928West Wittering \ R \ January1928-March1928  1
Description of improvements to an electrical starter system, including a press button, taper armature motors, and a magnetic switch unit.17th Jan 1928West Wittering \ R \ January1928-March1928  2
Design points and improvements for 40/50 water pumps.9th Jan 1928West Wittering \ R \ January1928-March1928  3
Describing one way of arranging a pump, with a cross-sectional diagram.31th Jan 1928West Wittering \ R \ January1928-March1928  4
Proposed improvements and alterations for the EAC.7 model, including details on the radiator, engine suspension, and body.9th Jan 1928West Wittering \ R \ January1928-March1928  5
Report discussing performance issues and design improvements for various vehicle components, including the throttle, induction pipe, brakes, and body style.2nd Feb 1928West Wittering \ R \ January1928-March1928  6
Arguing for grouped instruments to be supplied as an extra on Sports models for improved appearance and lighting.9th Jan 1928West Wittering \ R \ January1928-March1928  7
Letter to Stothert & Pitt Ltd regarding a pump test and requesting a demonstration model.10th Jan 1928West Wittering \ R \ January1928-March1928  8
Letter from Stothert & Pitt Ltd. regarding a misunderstanding over a small rotary displacement pump model.5th Jul 1928West Wittering \ R \ January1928-March1928  9
Issues and potential improvements for 40/50 & 20HP crankshaft friction dampers.14th Jan 1928West Wittering \ R \ January1928-March1928  10
Design and application of a proposed 5-inch universal joint for project EAC.10.11th Jan 1928West Wittering \ R \ January1928-March1928  11
Dispatch of original drawings for a crankcase, mentioning corrections and previous blueprints.8th Jul 1928West Wittering \ R \ January1928-March1928  12
The feasibility and methods for removing a gearbox without removing the engine on the EAC.10 model.11th Jan 1928West Wittering \ R \ January1928-March1928  13
'weired' induction pipe, comparing its application on models EAC.10 and EAC.14.13th Jan 1928West Wittering \ R \ January1928-March1928  14
Bearing adaptations and other modifications for a hypoid axle with a 1-inch offset.14th Jan 1928West Wittering \ R \ January1928-March1928  15
Issues with crankshaft dampers, considering woven cotton as a superior material, and analysing Chrysler's design.14th Jan 1928West Wittering \ R \ January1928-March1928  16
Suspension design, weight distribution, and handling improvements for 20HP and 40/50 models.14th Jan 1928West Wittering \ R \ January1928-March1928  17
The insufficiency of car damping systems, comparing hydraulic and solid friction methods on the 20HP model.16th Jan 1928West Wittering \ R \ January1928-March1928  18
Design improvements for the E.A.C.10. engine's water pump gland, inlet pipe, and cylinder block rib.16th Jan 1928West Wittering \ R \ January1928-March1928  19
Design and placement of a sports toolbox and running board.17th Jan 1928West Wittering \ R \ January1928-March1928  20
The design options for an EAC.14 engine induction pipe, comparing a high carburetter setup with a lower one.17th Jan 1928West Wittering \ R \ January1928-March1928  21
Page 2 of a document describing a manifold drainage slot design and its limitations.20th Jan 1928West Wittering \ R \ January1928-March1928  22
Design memorandum regarding the Sports Phantom front wing third (rear) stay.20th Jan 1928West Wittering \ R \ January1928-March1928  23
The difficulties with a large experimental worm of .900 pitch for steering systems.20th Jan 1928West Wittering \ R \ January1928-March1928  24
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