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
Cause of shock absorber link failure and proposing material and dimensional improvements.24th Feb 1926Box 68 \ 2  scan0125
Improvements to the Phantom's suspension and ride comfort compared to the Silver Ghost.25th Feb 1926Box 68 \ 2  scan0126
Typed report on vehicle noise, comfort, and performance improvements, comparing the New Phantom to the Silver Ghost.2nd Feb 1926Box 68 \ 2  scan0127
Oil leakage and chattering issues with hydraulic shock absorbers.2nd Feb 1926Box 68 \ 2  scan0128
Trials on packings, pressings, and the choice of oil for shock absorbers.27th Feb 1926Box 68 \ 2  scan0129
Difficulty in fitting a shock damper bolt due to a new valve, suggesting design modifications.27th Feb 1926Box 68 \ 2  scan0130
Oil leakage from shock dampers and potential solutions.27th Feb 1926Box 68 \ 2  scan0131
Oil leakage issues and experimental testing on hydraulic shock absorbers.1st Mar 1926Box 68 \ 2  scan0132
Suggestions to overcome oil escaping from hydraulic shock dampers.2nd Mar 1926Box 68 \ 2  scan0133
Design improvements and failure analysis of hydraulic shock dampers.2nd Mar 1926Box 68 \ 2  scan0134
Suggestion for a large gauze disc filter to be used when filling from a stand pipe.1st Mar 1925Box 68 \ 2  scan0135
Oil leakage from hydraulic shock damper glands during road tests.1st Mar 1925Box 68 \ 2  scan0136
Troubleshooting oil leaks and frothing in dampers, and the testing of potential solutions.4th Mar 1926Box 68 \ 2  scan0137
Improvements and a temporary arrangement for hydraulic shock absorbers.4th Mar 1926Box 68 \ 2  scan0138
Suggestions for improving hydraulic shock dampers, including reducing oil leakage.3rd Apr 1926Box 68 \ 2  scan0139
Potential causes and solutions for oil loss in hydraulic shock dampers, including a diagram.5th Mar 1926Box 68 \ 2  scan0140
Continued discussion on modifications for piston and valve design, comparing it to Houdaille products.1st May 1926Box 68 \ 2  scan0141
New asbestos and graphite packing for shock dampers which proved superior to felt.1st May 1926Box 68 \ 2  scan0142
'Phantom Springing' tests, detailing how adjusting front shock absorber stiffness affects rear seat ride comfort, causing pitching.10th Mar 1926Box 68 \ 2  scan0143
Confirming instructions to stop work on one shock damper scheme and replace it with a new one.11th Mar 1926Box 68 \ 2  scan0144
Experimental modifications to hydraulic shock dampers.11th Mar 1926Box 68 \ 2  scan0145
Design improvements and potential issues for hydraulic shock dampers.12th Mar 1926Box 68 \ 2  scan0146
Greasing versus soaking leathers in front shock absorbers.15th Mar 1926Box 68 \ 2  scan0147
Improvements to rear springs, shock dampers, and tyres for the Phantom model.15th Mar 1926Box 68 \ 2  scan0148
Vehicle suspension, tyre performance, and ride comfort issues.19th Mar 1926Box 68 \ 2  scan0149
Design improvements for hydraulic shock dampers, mentioning filter, gland tightness, and spring load options.19th Mar 1926Box 68 \ 2  scan0150
Alterations to hydraulic shock dampers for the Phantom chassis.20th Mar 1926Box 68 \ 2  scan0151
Suggested modifications to hydraulic shock dampers, including valve and filter changes.20th Mar 1926Box 68 \ 2  scan0152
Outlining experiments to investigate and resolve Phantom suspension complaints.26th Mar 1926Box 68 \ 2  scan0153
Springing demonstration to investigate suspension oscillations and jolts felt by passengers.26th Mar 1926Box 68 \ 2  scan0154
Tests on vehicle suspension, tyres, and shock dampers to investigate a ride quality complaint.4th Apr 1926Box 68 \ 2  scan0155
Positioning and specifications for hydraulic shock dampers on a Phantom rear axle.4th Apr 1926Box 68 \ 2  scan0156
The difficulties and potential solutions for fitting hydraulic shock dampers to the 7-EX model.17th Apr 1926Box 68 \ 2  scan0157
Typed memo discussing a fitting difficulty between the front bolts and the radiator-engine support.19th Apr 1926Box 68 \ 2  scan0158
Containing a copy of a telegram regarding modifications to shock dampers.19th Apr 1926Box 68 \ 2  scan0159
Recommendation to grease leathers for friction type shock dampers upon erection instead of soaking them in oil.19th Apr 1926Box 68 \ 2  scan0160
Fitting of hydraulic shock dampers to chassis 7-EX and EAC.V111.21th Apr 1926Box 68 \ 2  scan0161
Cable about the mounting of hydraulic shock dampers on the front of a Phantom.29th Apr 1926Box 68 \ 2  scan0162
Response to a criticism from Mr. Royce regarding the design and fitting of hydraulic shock dampers.5th May 1926Box 68 \ 2  scan0163
Explaining why a drill jig plate for hydraulic dampers was incorrect, as it was made for an EAC-8 chassis and not the required 'V' or 'W' series.1st Apr 1926Box 68 \ 2  scan0164
Modification to hydraulic dampers, incorporating a 4-stud cap instead of a 2-stud one to resolve leakage issues.26th May 1926Box 68 \ 2  scan0165
Fitting shock dampers, enclosing blueprints and detailing chassis modifications required.24th Jun 1926Box 68 \ 2  scan0166
Standardisation and testing of hydraulic shock dampers on the 20 HP and Phantom models.9th Jul 1926Box 68 \ 2  scan0167
Testing of hydraulic dampers on various car models and their effect on ride quality.9th Jul 1926Box 68 \ 2  scan0168
Readiness of a car and the plan to demonstrate its hydraulic dampers to the Sales Department.13th Jul 1926Box 68 \ 2  scan0169
The buffer size for hydraulic shock dampers and a proposal for axle clearance.13th Jul 1926Box 68 \ 2  scan0170
Rubber compression and clearance for hydraulic shock dampers.17th Jul 1926Box 68 \ 2  scan0171
The testing of front shock absorbers, detailing performance issues, modifications, and comparisons.17th Sep 1926Box 68 \ 2  scan0172
Letter from Maurice Olley discussing the trial of Vim leather packings and an idea about hydraulic performance.17th Sep 1928Box 68 \ 2  scan0173
Proposed shield for the rear shock damper on the Phantom.16th Oct 1926Box 68 \ 2  scan0174
Proposal under scheme 2283 to strengthen the rear bracket for a Phantom rear shock damper.16th Oct 1926Box 68 \ 2  scan0175
Standardisation of chassis parts concerning rear hydraulic shock dampers.1st Oct 1926Box 68 \ 2  scan0176
Recommending the adoption of rear hydraulic dampers for the Phantom model, noting their advantages.14th Dec 1926Box 68 \ 2  scan0177
Modifications to the Phantom front axle control to use a standard shock damper.14th Dec 1926Box 68 \ 2  scan0178
New details and parts list for a spring-loaded torque arm ball joint on a Phantom Chassis.29th Jan 1927Box 68 \ 2  scan0179
Modifications to hydraulic shock dampers to resolve bearing issues.15th Feb 1927Box 68 \ 2  scan0180
Modified instructions for shock absorber settings and testing.1st Feb 1927Box 68 \ 2  scan0181
Guide on adjusting shock absorbers and diagnosing suspension-related complaints.29th Sep 1938Box 68 \ 2  scan0182
Instructions for setting and checking the loading of front and rear shock absorbers.4th Mar 1927Box 68 \ 2  scan0183
Provisional patent sketches for hydraulic dampers with variable pressure.4th Mar 1927Box 68 \ 2  scan0184
Tests on forced feed lubrication for hydraulic shock damper bearings and addressing oil leakage.5th Mar 1927Box 68 \ 2  scan0185
Table of theoretical and actual loads for various hydraulic damper springs.14th Mar 1927Box 68 \ 2  scan0186
Modifications to the rear shock damper casting and shaft to increase wear resistance.14th Mar 1927Box 68 \ 2  scan0187
Recommendations for modifications to hydraulic shock dampers on 20 HP and 40/50 HP cars.20th May 1927Box 68 \ 2  scan0188
Low pressure loading on 40/50 HP rear hydraulic shock dampers.26th May 1927Box 68 \ 2  scan0189
Adjustments to the 40/50 HP rear hydraulic dampers, including spring changes and load settings.27th May 1927Box 68 \ 2  scan0190
Spring load adjustments and frictional tightness for the 40/50 HP rear hydraulic dampers.27th May 1927Box 68 \ 2  scan0191
Accessibility and potential design alterations for the shock dampers on the Phantom & EAC.7 axle control.27th May 1927Box 68 \ 2  scan0192
Standardizing shock damper springs to simplify low-pressure loadings.2nd Jun 1927Box 68 \ 2  scan0193
Alteration and testing process for component free lengths before placing a quantity order.15th Jun 1927Box 68 \ 2  scan0194
Front axle control, suggesting to proceed with tests and addressing a potential issue with the exhaust pipe's proximity to the shock damper.15th Jun 1927Box 68 \ 2  scan0195
Test results and proposed standardisation for shock damper springs on 40/50 HP and 20 HP models.17th Jun 1927Box 68 \ 2  scan0196
List of part numbers and load specifications for front and rear springs on the 20 HP model.24th Jun 1927Box 68 \ 2  scan0197
Modifications to the front exhaust pipe related to the front axle control by shock damper.24th Jun 1927Box 68 \ 2  scan0198
The Phantom's front axle control, exhaust pipe placement, and an experimental test on axle twist.25th Jun 1927Box 68 \ 2  scan0200
The lubrication of improved front shock damper connecting links after a 4000-mile test on an 8-EX car.21th Jul 1927Box 68 \ 2  scan0201
Adaptation of centralised lubrication and other modifications to the rear axle.13th Oct 1927Box 68 \ 2  scan0202
Request to fit altered rear shock absorbers to vehicles 12-EX and 14-EX.25th Oct 1927Box 68 \ 2  scan0203
Requesting the loads for the axle control shock absorber arm match those of the front shock absorbers.28th Nov 1927Box 68 \ 2  scan0204
Request for the shock absorbers from Mr. Royce's car (7-EX) for examination.1st Jan 1928Box 68 \ 2  scan0205
Stiffer rear road springs suitable for 'speed fiends', being sent from the Experimental department to Production.1st Jan 1928Box 68 \ 2  scan0206
Effectiveness of hydraulic dampers on Phantom and 20 HP cars, with a suggested design change.19th Feb 1928Box 68 \ 2  scan0207
Adjustments to hydraulic dampers on Phantom and 20 HP models.28th Feb 1928Box 68 \ 2  scan0208
Three proposed body types for the EAC.10 chassis, to be known as 'SS'.23th Mar 1928Box 68 \ 2  scan0209
Improvements to car body mounting, headlights, and instruments.30th Mar 1928Box 68 \ 2  scan0210
Results of tests on staggering orifices in hydraulic dampers for Phantom and 20 HP models.30th Mar 1928Box 68 \ 2  scan0211
The effects of oil viscosity and temperature on shock absorber pressure, including test data.30th Mar 1928Box 68 \ 2  scan0212
Vehicle suspension dynamics, focusing on shock absorbers, damping characteristics and road holding.30th Mar 1928Box 68 \ 2  scan0213
Technical discussion on the performance of rubber buffers in shock absorbers, outlining their disadvantages and proposing future improvements.30th Mar 1928Box 68 \ 2  scan0214
Comparison of existing (14-EX) and ideal suspension damper performance graphs for different driving conditions.30th Mar 1928Box 68 \ 2  scan0215
Obtaining exact records of shock absorber loadings and internal pressures for further investigation.30th Mar 1928Box 68 \ 2  scan0216
Graph showing the rating of a road spring and buffer, plotting load against deflection.30th Mar 1928Box 68 \ 2  scan0217
Graph showing the measured rating of rubber buffers for a 40/50 rear axle, plotting load against deflection.30th Mar 1928Box 68 \ 2  scan0218
Performance graph for a hydraulic damper with staggered orifices, plotting oil pressure against piston velocity at various temperatures.30th Mar 1928Box 68 \ 2  scan0219
Graph comparing the viscosities of various oils at different temperatures.21th Mar 1928Box 68 \ 2  scan0220
Blueprint detailing various tests conducted on a hydraulic shock damper.21th Mar 1928Box 68 \ 2  scan0221
Blueprint detailing hydraulic shock damper tests with various restriction configurations and pressure results.14th Apr 1928Box 68 \ 2  scan0222
Causes and solutions for oil shortages in hydraulic shock dampers.14th Apr 1928Box 68 \ 2  scan0223
Solutions for a shock absorber filling and air release issue.27th Apr 1928Box 68 \ 2  scan0224
Investigations into the causes of knocking in hydraulic shock absorbers.27th Apr 1928Box 68 \ 2  scan0225


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