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).
Rolls-Royce Experimental Archives                
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DescriptionDateIdentifier
Reducing the friction stages in the 20-HP steering device from three to two due to stiffness.1st Oct 1926Box 106 \ 3  scan0108
Steering modification for the 20HP model to address steering joggle complaints.9th Oct 1926Box 106 \ 3  scan0109
Modified steering on existing 20-HP cars.29th Oct 1926Box 106 \ 3  scan0110
Modification for the steering on existing 20-HP cars in response to customer complaints.27th Oct 1926Box 106 \ 3  scan0111
Modification to the 20 HP side steering tube springs due to a large number of steering complaints.30th Oct 1926Box 106 \ 3  scan0112
Standardisation of chassis parts by incorporating 'B' type side levers with 'D' type steering.22th Oct 1926Box 106 \ 3  scan0113
Redesign of the longitudinal tube ball end for steering, focusing on safety, shocks, and damping.11th Nov 1926Box 106 \ 3  scan0114
Steering issues, complaints of 'joggles', and proposed modifications for the 20 HP model.12th Nov 1926Box 106 \ 3  scan0115
Steering system tests and issues like wobbles on the 20 HP and Phantom models.15th Nov 1926Box 106 \ 3  scan0116
Clarifying the position and proposed modifications for the 20 HP steering system.15th Nov 1926Box 106 \ 3  scan0117
Steering issues and potential modifications for the 20 HP model.21th Sep 1926Box 106 \ 3  scan0118
The modification and testing of the 20 HP side steering tube.20th Nov 1926Box 106 \ 3  scan0119
Friction in the 20 HP pivots and changes to the steering system.29th Nov 1926Box 106 \ 3  scan0120
Issue of steering joggle on the 20 HP model and proposing design modifications.1st Dec 1926Box 106 \ 3  scan0121
Load measurements on a cross steering tube under different conditions.1st Dec 1926Box 106 \ 3  scan0122
Use of a spring-loaded cross steering tube as a standard, cheaper alternative and a request for its modification.1st Dec 1926Box 106 \ 3  scan0123
Modification to the 20 HP side steering tube.14th Dec 1926Box 106 \ 3  scan0124
New experimental features fitted to a 20 HP chassis for trial.14th Dec 1926Box 106 \ 3  scan0125
Dissatisfaction with the steering on 20-HP cars and recommending retrospective modifications due to breakages.16th Dec 1926Box 106 \ 3  scan0126
Standardization of a side steering tube improvement and alternative proposals.17th Dec 1926Box 106 \ 3  scan0127
Friction issues in the steering of a 20 HP car.17th Dec 1926Box 106 \ 3  scan0128
Recommendations for spring ratings and parts for the 20 HP side steering tube.7th Jan 1927Box 106 \ 3  scan0129
Requesting the preparation of a 20 HP steering column with a .750 lead worm and nut for a customer's car, F.54941.13th Jan 1927Box 106 \ 3  scan0130
Experiments for the 20 HP side steering tube, with recommendations for different spring setups.7th Jan 1927Box 106 \ 3  scan0131
Design choice for a 20 HP steering longitudinal tube.10th Jan 1927Box 106 \ 3  scan0132
Modifications to the 20 HP radiator shutters and steering column controls.28th Jan 1927Box 106 \ 3  scan0133
Temporary scheme for adding friction and a self-centring spring mechanism to the 20 HP steering column.28th Jan 1927Box 106 \ 3  scan0134
Effects of friction and self-centering forces on a vehicle's steering system.28th Jan 1927Box 106 \ 3  scan0135
Graph plotting Load in Lbs at the end of a pendulum lever against its angular movement in degrees.2nd Feb 1927Box 106 \ 3  scan0136
Investigation into the cause of steering wheel 'joggles' or 'twitching' on the 20 HP model in comparison to the 40/50 HP model.2nd Feb 1927Box 106 \ 3  scan0137
Technical memorandum discussing steering tube spring movement, joggle, and potential improvements to the steering geometry.2nd Feb 1927Box 106 \ 3  scan0138
Graph and table comparing the angular movement of the steering wheel induced by front axle movement for different chassis types.2nd Feb 1927Box 106 \ 3  scan0139
Comparative table of steering characteristics for different Phantom chassis series.2nd Feb 1927Box 106 \ 3  scan0140
Table of test results for the 20 HP chassis steering system under various configurations and components.2nd Feb 1927Box 106 \ 3  scan0141
Requesting information on potential improvements for the 20 HP steering geometry.2nd Feb 1927Box 106 \ 3  scan0142
Summary comparing schemes for a 20 HP side steering tube's springs.4th Feb 1927Box 106 \ 3  scan0143
Road quality and the machining of parts and springs for new cars.2nd Feb 1927Box 106 \ 3  scan0144
Re-evaluation of friction in the steering column due to variations in steering quality.2nd Feb 1927Box 106 \ 3  scan0145
Tests and analysis of friction in the steering system, focusing on the worm and nut mechanism.7th Feb 1927Box 106 \ 3  scan0146
Report comparing steering system performance and resistance to 'joggles' across different car models.7th Feb 1927Box 106 \ 3  scan0147
Test results and modifications to the steering column on a 20 HP car to improve feel and self-centering.7th Feb 1927Box 106 \ 3  scan0148
Report page discussing experiments on car friction, high-speed wobbles and 'joggles', with a related graph showing load versus angular movement.7th Feb 1927Box 106 \ 3  scan0149
Technical explanation of steering system friction and its advantages over standard friction.7th Feb 1927Box 106 \ 3  scan0150
List of disadvantages concerning low and high-speed wobbles and issues with self-centering.10th Feb 1927Box 106 \ 3  scan0151
Potential improvements and experimental trials for steering systems.10th Feb 1927Box 106 \ 3  scan0152
Design suggestions for dampers and 20 HP steering, citing being overburdened with work and having a depleted staff.10th Feb 1927Box 106 \ 3  scan0153
Friction in the steering column for 40/50 HP and 20 HP cars.21th Feb 1927Box 106 \ 3  scan0154
List of parts for a temporary friction scheme on a 'D' type steering column for a 20-HP chassis.9th Mar 1927Box 106 \ 3  scan0155
Instruction to trial an aluminium bracket for connecting the steering column to the dashboard on the Phantom model.15th Mar 1927Box 106 \ 3  scan0156
Potential improvements to the vehicle's steering system.22th Mar 1927Box 106 \ 3  scan0157
Preferred combinations for steering system components and damping methods.1st Apr 1927Box 106 \ 3  scan0158
Steering geometry of the EAC.7, comparing its bump and rebound characteristics with the Phantom and 20 HP models.1st Apr 1927Box 106 \ 3  scan0159
Continuation of a report on the worsened geometry of the EAC.7 component after modifications.1st Apr 1927Box 106 \ 3  scan0160
Cause of bad steering geometry on the 20 HP model and suggesting an experiment with a previously abandoned side steering lever.1st Apr 1927Box 106 \ 3  scan0161
Alternative proposals for steering modifications and associated experiments.7th Apr 1927Box 106 \ 3  scan0162
Proposal and experimental setup for a returning spring on the worm tube for steering.7th Apr 1927Box 106 \ 3  scan0163
Cause of a steering 'joggle' on a 20 HP car, weighing geometry vs. gyroscopic action.30th Apr 1927Box 106 \ 3  scan0164
Improvements to the 20 HP steering geometry by altering the side steering tube layout.30th Apr 1927Box 106 \ 3  scan0165
Device to add friction to the steering column for 'India Steering'.5th May 1927Box 106 \ 3  scan0166
Clicking or knocking issue in the 20 HP side steering tube springs caused by suction.7th May 1927Box 106 \ 3  scan0167
Experiments for the general improvement of the Phantom steering system.12th May 1927Box 106 \ 3  scan0168
Modification to a spanner for adjusting the ball thrust race on the India steering friction device.13th May 1927Box 106 \ 3  scan0169
Clicking issue in the 20 HP side steering tube and potential modifications.14th May 1927Box 106 \ 3  scan0170
Order for parts for a raked type friction device on a 20-HP Chassis steering column.17th Jun 1927Box 106 \ 3  scan0171
Parts list and instruction to produce and fit a friction device on a steering column for a 20-HP experimental chassis.21th May 1927Box 106 \ 3  scan0172
The effect of tyre tread shape on steering heaviness for 40/50 HP and 20 HP models.23th Jun 1927Box 106 \ 3  scan0173
Difficulties with friction in the 20 HP steering column, suggesting a design change to the plates.1st Aug 1927Box 106 \ 3  scan0174
Request to make two sets of friction parts for 40/50 HP models and two sets for 20 HP models.1st Aug 1927Box 106 \ 3  scan0175
Friction and play issues in the steering column, referencing observations made on a 'blue car'.17th Aug 1927Box 106 \ 3  scan0176
Potential improvements for the 20 HP model, regarding steering, chassis, bodywork, and tyres.9th Sep 1927Box 106 \ 3  scan0177
Deletion of 'B' steering, the body type, and the standardisation of a wider dash.9th Sep 1927Box 106 \ 3  scan0178
Standardisation of the mixture control on the column to align the design with the Phantom model.23th May 1927Box 106 \ 3  scan0179
Introduction of a new part for an 'M' series chassis, including test date and costs.1st Apr 1928Box 106 \ 3  scan0180
Difficulty in fitting Flexi-Lubri covers over the pendulum lever for a 20 HP car.14th Oct 1927Box 106 \ 3  scan0181
Technical note regarding the fitting issue of a Flexi-Lubri cover onto a 20 HP pendulum lever ball end.14th Oct 1927Box 106 \ 3  scan0182
Ongoing complaints and potential tests for the 20 HP steering system.14th Oct 1927Box 106 \ 3  scan0183
Request to produce revised friction plates for the steering column friction device on a 20-HP experimental chassis.19th Oct 1927Box 106 \ 3  scan0184
Blueprint showing an experimental test on S.S. Tube Joints, schemes N.Sch 2258 and 2301, including load test graphs.8th Nov 1927Box 106 \ 3  scan0185
Adding friction to the 20 HP steering column and improving the steering geometry.22th Oct 1927Box 106 \ 3  scan0186
Trial of improved steering geometry for the 20 HP model.25th Oct 1927Box 106 \ 3  scan0187
Revisions to the 20 HP model, including engine upgrades, a longer chassis, and standardized steering.29th Oct 1927Box 106 \ 3  scan0188
Road tests on a 20 HP model with modified steering geometry.8th Nov 1927Box 106 \ 3  scan0189
Deletion of oil holes and grooves in steering worms, returning to the original design.14th Nov 1927Box 106 \ 3  scan0190
Standardisation of chassis parts by deleting oil holes and grooves in steering worms to reduce cost.20th Oct 1927Box 106 \ 3  scan0191
Standardisation form for chassis parts detailing changes, costs, and implementation schedule.31th Oct 1921Box 106 \ 3  scan0192
The assembly of Side Steering Tubes for the 20-HP chassis improved geometry scheme.18th Nov 1927Box 106 \ 3  scan0193
Updates and replacement parts for the steering geometry on a 20-HP Chassis.17th Nov 1927Box 106 \ 3  scan0194
Inclusion of new steering components in a chassis for testing before a 10,000-mile test in France.22th Nov 1927Box 106 \ 3  scan0195
Confirmation of clearance modifications to the 20 HP side steering tube for improved geometry, requesting new part details for an ongoing bump test.8th Dec 1927Box 106 \ 3  scan0196
Steering complaint from Mr. Geoffrey Summers, detailing delays on a modification and offering a 20 HP car.23th Dec 1927Box 106 \ 3  scan0197
Failure of 20 HP side steering tube springs during tests and proposing a new standard spring.2nd Jan 1928Box 106 \ 3  scan0198
Standardisation of chassis parts for an improved 20 HP steering geometry.22th Dec 1927Box 106 \ 3  scan0199
Standardisation form for a new chassis part, detailing the first chassis for fitting, test date, and associated costs.1st Apr 1928Box 106 \ 3  scan0200
Technical memorandum discussing steering imperfections and potential improvements for the 20 HP and 45 HP models.25th Mar 1928Box 106 \ 3  scan0201
Modifications to the steering pivot on 20 HP & 40/50 models to reduce road shocks.31th Mar 1928Box 106 \ 3  scan0202
Outlining objections to an irreversible steering system, focusing on high-speed wobble, handling, and component reliability.1st Apr 1928Box 106 \ 3  scan0203
Technical discussion on the causes of wheel wobble and potential steering geometry solutions.4th Jul 1928Box 106 \ 3  scan0204
Review of steering columns, scuttles, and dashboards for 20 HP and 40 HP models, detailing issues of flexibility, vibration and potential solutions.4th Jul 1928Box 106 \ 3  scan0205
Comparing the overall steering ratios of various American cars to the 40/50 model.2nd Apr 1928Box 106 \ 3  scan0206
Steering system design, flexibility, and comparison with competitor vehicles.16th Apr 1928Box 106 \ 3  scan0207


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