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
Report page comparing riding comfort based on modifications to spring friction, shock dampers, and tyre pressures.20th Apr 1926Box 55 \ 3  Scan142
Test to improve riding comfort by altering the car's centre of gravity and suspension.20th Apr 1926Box 55 \ 3  Scan143
Test report comparing the ride quality of a 20 HP car and a New Phantom using a water spillage measuring device.20th Apr 1926Box 55 \ 3  Scan144
Front spring deflection, its effect on ride comfort, and ongoing tests to address high-speed wobbles.21th Apr 1926Box 55 \ 3  Scan145
Investigation and design for fitting hydraulic shock dampers to various chassis models.21th Apr 1926Box 55 \ 3  Scan146
Chassis suspension, including tyres, road springs, and dampers.25th Apr 1926Box 55 \ 3  Scan147
Technical discussion on vehicle suspension, focusing on spring length, stiffness, and the necessity of effective hydraulic dampers.25th Apr 1926Box 55 \ 3  Scan148
Improving vehicle ride comfort and handling through changes to springs, weight distribution, and braking.25th Apr 1926Box 55 \ 3  Scan149
Continued discussion on vehicle suspension, handling characteristics, and potential issues caused by coachbuilders or owners.26th Apr 1926Box 55 \ 3  Scan150
On the progressive development of hydraulic shock dampers, arguing in favour of a restricted vent with a back pressure valve.26th Apr 1926Box 55 \ 3  Scan151
Suspension issues on a 20HP car, recommending stiffer springs and hydraulic shock dampers for French conditions.22th Apr 1926Box 55 \ 3  Scan152
Preliminary tests of hydraulic dampers for the Phantom suspension system, with a bar chart comparing performance.24th Apr 1926Box 55 \ 3  Scan153
Requesting the fitting and testing of new hydraulic shock dampers and special brake linings.26th Apr 1926Box 55 \ 3  Scan154
Modified arrangement for hydraulic shock dampers on the rear of an E.A.C. 8s chassis.26th Apr 1926Box 55 \ 3  Scan155
Shock damper settings and weight distribution for the Phantom suspension system.27th Apr 1926Box 55 \ 3  Scan156
Cabled message regarding hydraulic shock dampers on the front of a Phantom vehicle.29th Apr 1926Box 55 \ 3  Scan157
Hydraulic shock damper lever failure on a 20 HP car and the proposed modifications.4th May 1926Box 55 \ 3  Scan158
Comparing the performance and failure risks of hydraulic versus Hartford shock dampers.4th May 1926Box 55 \ 3  Scan159
Car controllability issues related to spring flexibility, viscosity effects, and shock damper testing.8th May 1926Box 55 \ 3  Scan160
The required range of movement for hydraulic shock dampers on the rear axle.8th May 1926Box 55 \ 3  Scan161
Complaint about the springing of a Phantom Demonstration Landaulet, recommending a refit with the latest hydraulic dampers.13th May 1926Box 55 \ 3  Scan162
Modifications and trials for engine pistons, auto advance, steering, axles, dampers, and magnetos.14th May 1926Box 55 \ 3  Scan163
Internal report discussing vehicle component design, costs, and market requirements.14th May 1926Box 55 \ 3  Scan164
Future hopes for manufacturing improvements and cost savings on specific chassis types.15th May 1926Box 55 \ 3  Scan165
List of questions arising from a telephone conversation regarding an agreement for 200 sets of shock dampers.15th May 1926Box 55 \ 3  Scan166
Phantom steering issues, discussing slower pitch worms, lighter axles, and suspension improvements.17th May 1926Box 55 \ 3  Scan167
The requirement for further piston castings for hydraulic shock absorbers and subsequent pattern alterations for the 40/50 HP chassis.17th May 1926Box 55 \ 3  Scan168
Cablegram from Springfield to Derby enquiring about the testing of a new front axle and the dispatch of shock absorbers.17th May 1926Box 55 \ 3  Scan169
Telegram from Springfield regarding a new front axle, potential design changes, and the dispatch of shock absorbers.19th May 1926Box 55 \ 3  Scan170
Modifications to car 7-EX to cure steering wobble and vibration.18th May 1926Box 55 \ 3  Scan171
Instructions for using .375 bolts with spherical seating in hydraulic shock damper levers.19th May 1926Box 55 \ 3  Scan172
The successful testing of hydraulic shock dampers and a proposal to order 200 pairs.19th May 1926Box 55 \ 3  Scan173
Approving a new hydraulic shock damper design and requesting an immediate start on production.19th May 1926Box 55 \ 3  Scan174
Results of steering tests in Paris, focusing on reducing shocks and eliminating high-speed wobble.19th May 1926Box 55 \ 3  Scan175
The use of weak versus strong steering tube springs on the first Phantom chassis to address low-speed wobbles and stiff steering.17th May 1926Box 55 \ 3  Scan176
Testing and resolving Phantom steering complaints in France.17th May 1926Box 55 \ 3  Scan177
N.Scheme 2186, concerning a strengthened and spherical headed bolt for hydraulic shock dampers.19th May 1926Box 55 \ 3  Scan178
Letter confirming a cablegram sent to the American branch about a despatch delay.20th May 1926Box 55 \ 3  Scan179
Confirming a cabled message about production delays for a new front axle and shock absorbers due to a strike.20th May 1926Box 55 \ 3  Scan180
Modifying hydraulic dampers to use 4 studs instead of 2 to fix a leakage issue.26th May 1926Box 55 \ 3  Scan181
Stress tests performed on hydraulic shock dampers, including a comparison with 'Hartford' shock absorbers.26th May 1926Box 55 \ 3  Scan182
The performance of hydraulic dampers, comparing different models and analysing oil viscosity effects.26th May 1926Box 55 \ 3  Scan183
Fluid damping tests, comparing different oils and analysing road test data from a chronograph.26th May 1926Box 55 \ 3  Scan184
Continued, discussing a rear shock damper arrangement using a steel sleeve.26th May 1926Box 55 \ 3  Scan185
Graph comparing the viscosity of Price's Motorine 'C' and Lovejoy Oil against temperature.28th May 1926Box 55 \ 3  Scan186
Design principles and modifications for hydraulic shock dampers.28th May 1926Box 55 \ 3  Scan187
Adapting a cover with 4 studs for hydraulic shock dampers.31th May 1926Box 55 \ 3  Scan188
On further improvements to hydraulic shock dampers, noting the new design is simpler and suggesting a patent.4th Jun 1926Box 55 \ 3  Scan189
Modified hydraulic shock damper for an experimental trial.8th Jun 1926Box 55 \ 3  Scan190
Cost-effectiveness and necessity of fitting hydraulic dampers to the 20 HP car.8th Jun 1926Box 55 \ 3  Scan191
Letter from the American branch to the English branch regarding the necessity of reaction dampers on the Phantom Engine.8th Jun 1926Box 55 \ 3  Scan192
Blueprints for a high-pressure valve spring for a front hydraulic shock absorber.9th Jun 1926Box 55 \ 3  Scan193
The comparative testing of hydraulic shock absorbers on a 20 HP chassis.9th Jun 1926Box 55 \ 3  Scan194
Further improvements and fitting proportions for hydraulic shock dampers.10th Jun 1926Box 55 \ 3  Scan195
Essential nature of hydraulic dampers for preventing high-speed wobbles on the 20 HP car.11th Jun 1926Box 55 \ 3  Scan196
Page 2 of a memorandum regarding the signing of a standardisation sheet by engineers.14th Jun 1926Box 55 \ 3  Scan197
Cable be sent to Mr. Olley in Springfield, U.S.A. regarding front axle tests.14th Jun 1926Box 55 \ 3  Scan198
Necessity and cost of modifying the 20 HP model to address high-speed wobbles when using medium-pressure tyres.14th Jun 1926Box 55 \ 3  Scan199
Outlining the 10,000-mile test procedure for hydraulic shock dampers, focusing on breather function and oil loss.15th Jun 1926Box 55 \ 3  Scan200
Procedures for checking shock damper loads, leakage, and troubleshooting potential blockages.15th Jun 1926Box 55 \ 3  Scan201
Using hydraulic shock dampers to resolve high-speed wobbles on 20 HP and Phantom models.15th Jun 1926Box 55 \ 3  Scan202
The performance and justification for the extra cost of hydraulic dampers on 20 HP cars.16th Mar 1926Box 55 \ 3  Scan203
Results and methodology of tests on hydraulic shock dampers.16th Jun 1926Box 55 \ 3  Scan205
The factors affecting oil flow resistance through orifices in hydraulic shock dampers.16th Jun 1926Box 55 \ 3  Scan206
Graph showing hydraulic shock absorber test results, plotting oil flow against oil pressure.6th Jun 1926Box 55 \ 3  Scan207
Proposal to establish a simple bench test for the glands on hydraulic shock dampers.6th Jun 1926Box 55 \ 3  Scan208
Cover note regarding a document about front shock absorbers received from America.24th Jun 1926Box 55 \ 3  Scan209
Letter discussing the urgent need for effective front shock absorbers for New Phantom and Silver Ghost cars.12th Jun 1926Box 55 \ 3  Scan210
Issues and tests on Lovejoy and R.R. friction-type shock absorbers.12th Jun 1926Box 55 \ 3  Scan211
Shock absorber performance, noise, and the effect of changing components.12th Jun 1928Box 55 \ 3  Scan212
Test results for various combinations of Lovejoy shock absorber springs and valves on models 39-JG and 69-JG.1st Jun 1926Box 55 \ 3  Scan213
Defects with Lovejoys front shock absorbers, detailing pitching and oil foaming issues.1st Jun 1926Box 55 \ 3  Scan214
From BJ discussing the justification for adding expensive hydraulic dampers to the 20 HP chassis.24th Jun 1926Box 55 \ 3  Scan215
Procedure for pressure testing hydraulic shock dampers for the front and rear of a car.25th Jun 1926Box 55 \ 3  Scan216
Instructions for testing and servicing shock dampers.28th Jun 1926Box 55 \ 3  Scan217
The testing of hydraulic shock dampers in France using two different types of oil and adjusting settings.28th Jun 1926Box 55 \ 3  Scan218
Outlining the test schedule and production status of experimental parts for the 12-EX car destined for France.28th Jun 1926Box 55 \ 3  Scan219
Adapting India Hydraulic Shock Dampers for 20HP frames.30th Jun 1926Box 55 \ 3  Scan220
Technical memorandum discussing the fitting of rear hydraulic shock dampers and associated modifications.6th Jul 1926Box 55 \ 3  Scan221
Use of accelerometers to measure riding comfort and g-forces for the Phantom suspension.15th Jul 1926Box 55 \ 3  Scan222
'water test' method for assessing vehicle riding comfort and comparing results between different models.15th Jul 1926Box 55 \ 3  Scan223
Report comparing ride quality with different dampers and suspension setups on various car models.15th Jul 1926Box 55 \ 3  Scan224
Series of graphs comparing riding comfort in front seats under various conditions at 23 M.P.H.16th Jul 1926Box 55 \ 3  Scan225
To halt work on high and low-pressure valve springs for the 40/50 HP chassis hydraulic shock damper.5th Jul 1926Box 55 \ 3  Scan226
To cancel the order for one part and double the quantity of another for the 20-HP chassis front hydraulic shock damper.7th Jul 1926Box 55 \ 3  Scan227
From 'BJ' requesting full information on the testing, design alterations, and production status of hydraulic shock dampers.1st Jul 1926Box 55 \ 3  Scan228
The introduction of hydraulic shock dampers and ceasing work on friction type dampers.8th Jul 1926Box 55 \ 3  Scan229
Standardisation and testing of hydraulic shock dampers on 20 HP and Phantom models.9th Jul 1926Box 55 \ 3  Scan230
Testing of hydraulic dampers on various car models to address ride quality complaints.9th Jul 1926Box 55 \ 3  Scan231
Readiness of a car and a proposed demonstration of its hydraulic dampers.12th Jul 1926Box 55 \ 3  Scan232
Positioning and modification of rear hydraulic shock dampers for the New Phantom chassis.12th Jul 1926Box 55 \ 3  Scan233
Bringing the EAC-1 car to WW to fit hydraulic dampers and a modified lightened axle forging.13th Jul 1926Box 55 \ 3  Scan234
Size and clearance of buffers for hydraulic shock dampers.13th Jul 1926Box 55 \ 3  Scan235
Adaptation of a forward support bracket for rear hydraulic shock dampers.16th Jul 1926Box 55 \ 3  Scan236
Compression and dimensions of a rubber buffer in a hydraulic shock damper.17th Jul 1926Box 55 \ 3  Scan237
Modifications to the hydraulic shock dampers on the rear of the EAC.7 chassis.23th Jul 1926Box 55 \ 3  Scan238
Letter from Maurice Olley to E.W. Hives thanking him for a report on shock absorbers.3rd Aug 1926Box 55 \ 3  Scan239
The availability of a 20 HP car and modifications required for a Phantom car.5th Aug 1926Box 55 \ 3  Scan240
Telegram from Chateauroux requesting available springs for hydraulic dampers.18th Aug 1926Box 55 \ 3  Scan241
Steering tests for the 12-EX car in France, investigating issues with Dunlop balloon tyres.18th Aug 1926Box 55 \ 3  Scan242


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