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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Preliminary results of an experimental test on a high-compression Phantom short chassis at Brooklands.14th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan139
Performance graph comparing Road Wheel B.HP against Engine R.P.M. for various car configurations at Brooklands.18th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan140
Analyzing the factors affecting a car's maximum speed, with results from tests at Brooklands.17th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan141
Revised advance report on the EAC Silent Starter Gear.19th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan142
Revised report on modifications to the EAC Silent Starter, detailing changes to windings and relay coil strength.18th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan143
Gear engagement thump, proposing solutions by modifying the gear ratio or motor windings.18th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan144
Fault condition with a push-button starter system observed on the 9-EX chassis.18th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan145
Continued description of an electrical system fault involving the main switch, relay switch, and motor.18th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan146
The adjustment and trial of a relay circuit for the engine starter motor.19th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan147
The first run of a V-Condor-2 supercharger engine, detailing over-oiling issues and performance tests.17th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan148
Condor 3 engine test, detailing performance, consumption, and supercharger condition.21th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan149
Comparing the moment of inertia of a new light type clutch plate unit against a standard one.23th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan150
Consumption tests for the 'Phantom' model, comparing its performance to the 'Silver Ghost'.11th Jan 1925West Wittering \ N \ 2October1925-December1925  Scan151
The method for conducting petrol consumption tests on a New Phantom touring car.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan152
Tests on petrol consumption, rolling resistance, and engine friction.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan153
Factors affecting petrol consumption, including speed, tyres, carburettor settings, and water temperature.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan154
Graphs showing the effects of speed, tyre pressure, and mixture control on petrol consumption.18th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan156
Series of graphs showing the effects of ignition advance, axle ratio, and engine temperature on petrol consumption.18th Nov 1929West Wittering \ N \ 2October1925-December1925  Scan157
The theoretical possibilities and limitations of fuel economy for the Phantom model.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan158
Study of theoretical and actual fuel economy improvements for the Phantom model.18th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan159
Car performance, detailing factors affecting petrol consumption and optimum driving speed.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan160
Page showing a graph of engine thermal efficiency versus load, with an analysis for a Phantom car.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan161
With graphs analyzing the effect of gear ratios and road speed on fuel economy and engine efficiency.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan162
Petrol consumption, focusing on the negative effects of acceleration and the use of four-wheel brakes.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan163
Carburation, discussing the trade-off between power and fuel economy, illustrated with a performance graph.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan164
Engine carburettor settings and ignition advance, discussing performance and efficiency.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan165
Engine friction, rolling resistance, and petrol consumption.21th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan166
Battery charging rates and internal resistance issues on the 'New Phantom' model.23th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan167
Continuation page discussing the potential reduction of dynamo output.23th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan168
Cover sheet for a report on chassis 8-EX after completing a 2,500-mile test run.23th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan169
The condition of chassis 8 EX after a 2,500-mile test.20th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan170
Condition report on various engine and exhaust system components.20th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan171
Test report detailing the condition and performance of various engine and vehicle components.20th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan172
Inspection report on the condition of various automotive components including connecting rods, bonnet, radiator, and steering.20th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan173
The performance and condition of various vehicle components during road tests.20th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan174
Condition report on a vehicle's front axle, brakes, springs, and headlight controls.20th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan175
Test report on headlights, 'Houdaille' front shock absorbers, standard rear axle, rear brakes, petrol tank, and a luggage grid.20th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan176
Condition report on various vehicle components including suspension, brakes, electrical systems, and chassis fittings.20th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan177
Test results for a car with a limousine body, detailing weight, performance, and tyre specifications.1st Nov 1925West Wittering \ N \ 2October1925-December1925  Scan178
Bumper test for Phantom chassis front springs, comparing performance with and without Ferodo interleaving material.1st Nov 1925West Wittering \ N \ 2October1925-December1925  Scan179
Comparison of process times in hours, with and without interleaving.1st Nov 1925West Wittering \ N \ 2October1925-December1925  Scan180
145-hour bumper test of a new Phantom steering system, comparing solid whitemetal and whitemetal steel threads.1st Nov 1925West Wittering \ N \ 2October1925-December1925  Scan181
The testing of hydraulic shock absorbers which failed due to distorted aluminium back plates.25th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan182
Cross-sectional diagram from a hydraulic shock damper endurance test, noting back plate distortion and a slight oil leak.25th Nov 1924West Wittering \ N \ 2October1925-December1925  Scan183
Experiments on ignition coil secondary winding arrangements and justifying the standard design.26th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan184
Bench and road tests on the Phantom carburetter to address complaints of poor carburation.26th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan185
Brief description of the action, adjustment, and limitations of the New Phantom carburetter.26th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan186
Page explaining the formula for petrol velocity with a corresponding graph plotting it against air velocity.26th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan187
Page discussing the effects of air velocity on fuel mixture and the detailed operation of the New Phantom carburetter.26th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan188
Page explaining carburetter adjustment, specifically the relationship between the low speed jet, high speed jet, and the air valve diaphragm, referencing a Phantom carburetter experiment.10th Oct 1925West Wittering \ N \ 2October1925-December1925  Scan189
Two graphs showing the position of mixture control versus RPM for carburettor adjustments.10th Oct 1925West Wittering \ N \ 2October1925-December1925  Scan190
Page detailing possible troubles from incorrect carburetter settings and explaining the automatic range of the carburetter.29th Jan 1925West Wittering \ N \ 2October1925-December1925  Scan191
Notes on carburetter adjustment, mixture control, and fuel distribution issues.29th Jan 1925West Wittering \ N \ 2October1925-December1925  Scan192
Instructions on fuel types, petrol supply, and carburetter adjustments for engine tuning.29th Jan 1925West Wittering \ N \ 2October1925-December1925  Scan193
Instructions for setting and testing the carburetter diaphragm, air valve, and low speed jet.29th Jan 1925West Wittering \ N \ 2October1925-December1925  Scan194
Typed document discussing the performance and potential troubles of the New Phantom carburetter.29th Jan 1925West Wittering \ N \ 2October1925-December1925  Scan195
Troubleshooting guide table listing engine performance issues and their probable causes.27th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan196
The 10,000-mile test of the 8-EX car in France, specifically detailing its axle configuration.27th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan197
Comparative report on different silencer designs and baffle configurations for the New Phantom.27th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan198
The performance, noise levels, and power loss of various silencer designs.26th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan199
Modifications to a silencer's intermediate pipe based on dynamometer test findings.12th Oct 1925West Wittering \ N \ 2October1925-December1925  Scan200
Graph comparing engine power curves from various silencer tests.27th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan201
Cover note for a report on the 8-EX chassis after 5,000 miles of running.27th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan202
Chassis 8 EX after a 5,000-mile test.24th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan203
Condition report on various engine and exhaust components following a test.24th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan204
Condition report on various vehicle components after examination.24th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan205
The condition of components including the oil release valve, battery ignition, bonnet, and radiator.24th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan206
Inspection report on the condition of vehicle components like the radiator, steering, and gearbox.24th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan207
Inspection report detailing the condition and performance of various vehicle components after testing.24th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan208
Condition report on various vehicle components including springs, brakes, shock absorbers, and the fuel system.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan209
Post-test condition report on various vehicle components including suspension, electricals, and chassis.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan210
Test report summary detailing vehicle weight, performance metrics, and test conditions.30th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan211
Report comparing the performance of Exide and Accu-Slem batteries for the 40/50 chassis.30th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan212
The testing and evaluation of experimental batteries from manufacturers Lihanode, Fuller Sparta, and Oldham.30th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan213
Comparison of low and high rate discharge capacity results for Exide, P & R, Fuller, and Oldham batteries.30th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan214
Comparison of performance curves and discharge capacity tests for various battery types including Fuller, Oldham, Exide, and P & R.30th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan215
Composition and testing of various battery types and their cells.30th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan216
The testing of various battery cells and their performance under different charging and discharging conditions.30th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan217
Battery charging characteristics, comparing Exide and P & R cells and proposing a specification change.30th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan218
Chassis variations, identifying battery internal resistance as the cause over generator inconsistencies.30th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan219
Graph comparing high rate discharge curves for various 40-50HP chassis batteries.30th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan220
The performance of the 10-EX car on the Brooklands track.30th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan222
Windage and acceleration tests conducted on the 10-EX New Phantom car at Brooklands.30th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan223
Performance tests and analysis of a sports car versus a standard Phantom.30th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan224
Analysing car performance with a high axle ratio and high compression engine.30th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan225
Comparing the braking performance of the 10-EX and 98-NK cars with the standard Phantom.30th Nov 1925West Wittering \ N \ 2October1925-December1925  Scan226
Frame distortion for a standard 20 HP vehicle tested on a bumping rig.1st Nov 1925West Wittering \ N \ 2October1925-December1925  Scan227
Frame distortion tests on the bumper for a 20 HP chassis.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan228
Chassis frame warp and distortion.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan229
Frame distortion and twist in relation to rear engine suspension tightness.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan230
With a sketch detailing markings on chassis cross members and proposing diagonal bracing to prevent horizontal distortion.7th Apr 1925West Wittering \ N \ 2October1925-December1925  Scan231
Over-oiling complaints on the New Phantom, detailing tests with 'L' shaped piston rings and varying oil supply to bearings.1st Dec 1925West Wittering \ N \ 2October1925-December1925  Scan232
Over-oiling, noisy tappets, and clutch jaggers.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan233
Issues with clutch, exhaust, steering, timing gears, springing, governor control, and acceleration.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan234
Vehicle issues such as brakes, engine, clutch, and steering.1st Dec 1925West Wittering \ N \ 2October1925-December1925  Scan235
Investigating oil contamination on the friction faces of brake servo motors.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan236
Page 2 of an experimental report discussing oil leakage on servo plates and proposing solutions.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan237
Diagram illustrating the distribution of oil from excessive lubrication at a specific point in a mechanism.1st Dec 1925West Wittering \ N \ 2October1925-December1925  Scan238
Testing an alternative scheme for the suction Autovac fuel feed system.1st Dec 1925West Wittering \ N \ 2October1925-December1925  Scan239
Tests of the Autovac vacuum feed system and its limitations on a Silver Ghost engine.12th Jun 1925West Wittering \ N \ 2October1925-December1925  Scan240


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