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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Riding quality issues with balloon tires, shock absorbers, and springs on Phantom and Silver Ghost models.10th Mar 1926Box 43 \ 2  Scan103
Letter requesting a spare set of R.R. hydraulic shock absorbers for a trial.10th Mar 1926Box 43 \ 2  Scan104
Letter from the American branch discussing ride quality and suspension issues on the Phantom model.6th Apr 1926Box 43 \ 2  Scan105
Letter discussing the riding quality of the Phantom compared to the Silver Ghost, with a sketch.6th Apr 1926Box 43 \ 2  Scan106
From CJ enclosing a copy of a cable from Mr. Olley regarding the New Phantom for RR of America Inc.1st Apr 1926Box 43 \ 2  Scan107
Copy of a cable discussing front spring stiffness and riding improvements on the Phantom model.7th Apr 1926Box 43 \ 2  Scan108
Letter discussing National Advisory Committee reports on superchargers, accelerometers, and the effects of G-force on pilots.15th Apr 1926Box 43 \ 2  Scan109
Page 2 of a letter discussing riding comfort, the Bureau of Standards, and a report on semi-rigid airships.15th Apr 1926Box 43 \ 2  Scan110
Results of suspension tests comparing a pre 'U' series Silver Ghost to a New Phantom.13th Apr 1926Box 43 \ 2  Scan111
Improvements to the Phantom's springing system, focusing on lubrication, spring selection, and shock dampers.18th Apr 1926Box 43 \ 2  Scan112
Continued note on potential causes for an issue, citing tyres, shock dampers, and springs.20th Apr 1926Box 43 \ 2  Scan113
Modifications to the front springs on a 12-MC chassis to improve ride comfort and reduce 'joggle'.20th Apr 1926Box 43 \ 2  Scan114
Investigating frame sag, vibration, and booming issues in a long wheelbase vehicle.20th Apr 1926Box 43 \ 2  Scan115
Test report on the effects of soft front springs on vehicle ride and steering wobble.20th Apr 1926Box 43 \ 2  Scan116
Test report memo discussing low speed wobble, pivot-lean, and shackle arrangements.20th Apr 1926Box 43 \ 2  Scan117
To Mr. Nadin regarding correspondence from America about front springs.21th Apr 1926Box 43 \ 2  Scan118
Letter detailing test results on front springs, specifically the effect of the wide axle pad and front shackle inclination.5th Apr 1928Box 43 \ 2  Scan119
Effects of shackle inclination on suspension stiffness and potential modifications.5th Apr 1926Box 43 \ 2  Scan120
Letter supplement detailing the results of a spring test, including load and stiffness measurements.5th Apr 1926Box 43 \ 2  Scan121
Test results for spring performance showing camber, load, and stiffness under various clipping and support configurations.5th Apr 1928Box 43 \ 2  Scan122
Test results and calculations for spring load, camber, and stiffness under various mounting conditions.5th Apr 1926Box 43 \ 2  Scan123
Calculations confirming spring and shackle performance, including stiffness and load under different camber settings.5th Apr 1928Box 43 \ 2  Scan124
Concluding page of a report comparing test results, marked as a copy.5th Apr 1925Box 43 \ 2  Scan125
Graph showing load and stiffness curves illustrating the stiffening effects on a front spring under various conditions.12th Oct 1938Box 43 \ 2  Scan126
The characteristics and improved riding quality of a new set of front springs for the Phantom car.5th Apr 1926Box 43 \ 2  Scan127
Steering improvements and front spring stiffness for the Phantom model, including spring plate specifications.5th Apr 1926Box 43 \ 2  Scan128
Development and use of accelerometers and seismographs for measuring car riding qualities.21th Apr 1926Box 43 \ 2  Scan129
Front spring tests for the 12-MC model, detailing modifications and performance outcomes.22th Apr 1926Box 43 \ 2  Scan130
Cabled message about improvements to car ride and steering, and the construction of experimental car MX-1.22th Apr 1926Box 43 \ 2  Scan131
Transcribed cable from Mr. Olley regarding testing of shackle springs and the necessity of a radius rod.22th Apr 1926Box 43 \ 2  Scan132
Cable from Mr. Olley regarding car ride improvements by shackling the rear springs.22th Apr 1926Box 43 \ 2  Scan133
Comparing the suspension and ride quality of the Phantom and Silver Ghost models.4th Apr 1926Box 43 \ 2  Scan134
Conclusion from a test on the springing of the 20 HP model.28th Apr 1926Box 43 \ 2  Scan135
Effects of shackling the rear spring on vehicle riding quality.28th Apr 1926Box 43 \ 2  Scan136
Analysis of spring stiffness, horizontal tension, and twisting effects on vehicle ride comfort.28th Apr 1926Box 43 \ 2  Scan137
Clarifying a telegram about spring stiffness ratings and testing for the Phantom suspension.29th Apr 1926Box 43 \ 2  Scan138
Letter containing a summary of topics related to spring suspension and shock absorbers.8th May 1926Box 43 \ 2  Scan139
The stiffening effects of a wide axle pad and inclined shackle on springs.8th May 1926Box 43 \ 2  Scan140
Technical report detailing adjustments and improvements to vehicle suspension springs.8th May 1926Box 43 \ 2  Scan141
Modifications to suspension shackles and seat cushions to improve vehicle ride quality.8th May 1928Box 43 \ 2  Scan142
Spring stiffness, sprung loads, and stamping inconsistencies.8th May 1926Box 43 \ 2  Scan143
The performance of spring gaiters and hydraulic shock absorbers.8th May 1926Box 43 \ 2  Scan144
Valve spring settings, friction tests on a Silver Ghost, and spring leaf modifications.8th May 1926Box 43 \ 2  Scan145
Graph showing the effect of a 20° inclination of a spring shackle on load and stiffness.14th May 1926Box 43 \ 2  Scan146
Covering memo regarding spring suspension and re-distribution of weight, attaching a letter received from America.14th May 1926Box 43 \ 2  Scan147
Letter discussing spring suspension and the re-distribution of weight in motor cars.4th May 1926Box 43 \ 2  Scan148
Vehicle dynamics, discussing moment of inertia, spring frequency, and the application of Rowell's formula.4th May 1926Box 43 \ 2  Scan149
Determining the moment of inertia for various car body types and the effects of weight distribution on spring suspension.4th May 1926Box 43 \ 2  Scan150
Cablegram regarding the testing of a new front axle and the despatch of shock absorbers.18th May 1926Box 43 \ 2  Scan151
Delay to a new front axle and the despatch of shock absorbers.19th May 1938Box 43 \ 2  Scan152
Cable to be sent to the U.S.A. regarding a delay in the despatch of shock absorbers.19th May 1926Box 43 \ 2  Scan153
For the Works Committee regarding spring suspension, enclosing a letter and blueprints from America.20th May 1926Box 43 \ 2  Scan154
Results of front spring rating tests carried out to address suspension complaints.27th May 1926Box 43 \ 2  Scan155
Spring testing methodology, comparing oscillation versus gradual loading and analyzing spring ratings.27th May 1926Box 43 \ 2  Scan156
Analysis of shackle inclination and pad variations on spring performance and torsional resistance.27th May 1926Box 43 \ 2  Scan157
The performance characteristics and testing of leaf springs, including the 'Woodhead' type.27th May 1926Box 43 \ 2  Scan158
Test report on front spring ratings with various configurations and loading conditions.27th May 1926Box 43 \ 2  Scan159
Two graphs comparing spring rating tests, one showing the effect of shackle angle and the other comparing spring systems.27th May 1926Box 43 \ 2  Scan160
Blank page with a red date stamp in the bottom right corner.27th May 1926Box 43 \ 2  Scan161
Two graphs illustrating spring rating tests, comparing shackle angle and pad width.27th May 1926Box 43 \ 2  Scan162
Two graphs comparing spring rating tests, one showing the effect of pad width and the other comparing different spring systems.27th May 1926Box 43 \ 2  Scan163
Two graphs showing results of spring rating tests, one for internal friction and one for independent test agreement.27th May 1926Box 43 \ 2  Scan164
Graph of spring rating tests showing the effect of internal friction under different loading conditions.27th May 1926Box 43 \ 2  Scan165
Graph from spring rating tests showing the effect of deflection due to shackle movement.27th May 1926Box 43 \ 2  Scan166
Graph showing the variation of shackle angle against compression for a narrow pad.27th May 1926Box 43 \ 2  Scan167
Graph plotting spring rating against total load to show the effect of deflection due to shackle movement.27th May 1926Box 43 \ 2  Scan168
Graph from a spring rating test comparing a standard spring with Woodhead's special spring.27th May 1926Box 43 \ 2  Scan169
The reverse of a document showing a red ink stamp from the Print Room.27th May 1926Box 43 \ 2  Scan170
Letter from America to Derby discussing road trials and measurements of different front spring shackle configurations.1st Jun 1926Box 43 \ 2  Scan171
Riding quality and an enclosed document received from America.28th Sep 1926Box 43 \ 2  Scan172
Letter discussing spring suspension, riding quality, and moment of inertia, referencing external research articles.15th Sep 1926Box 43 \ 2  Scan173
Letter concerning vehicle riding quality, specifically front axle oscillations and tests with different shock absorbers.8th Nov 1926Box 43 \ 2  Scan174
Letter discussing issues with friction and hydraulic suspension systems and potential improvements.8th Nov 1926Box 43 \ 2  Scan175
Comparing the riding quality and dynamics of a Silver Ghost Cabriolet and a Phantom Sedan.11th Oct 1926Box 43 \ 2  Scan176
Comparison of suspension characteristics, oscillation, and pitching speed between different car models like the Silver Ghost and Phantom.11th Oct 1926Box 43 \ 2  Scan177
Technical analysis of vehicle suspension characteristics, including pitching speeds, spring rates, and axle pad effects.11th Oct 1926Box 43 \ 2  Scan178
Spring stiffness tests and their effect on vehicle ride quality.10th Nov 1926Box 43 \ 2  Scan179
Letter to F.H. Royce comparing the riding quality and radius of gyration of a Silver Ghost and a Phantom.10th Nov 1926Box 43 \ 2  Scan180
Technical analysis comparing suspension characteristics and weight distribution of the Phantom and Silver Ghost models.10th Nov 1926Box 43 \ 2  Scan181
Analysis of vehicle pitching speeds and the factors that influence them, such as springs, weight distribution, and wheelbase.10th Nov 1926Box 43 \ 2  Scan182
Spring stiffness tests and their effect on vehicle ride characteristics.10th Nov 1926Box 43 \ 2  Scan183
Letter from the American to the British office regarding steering and front spring stiffness.11th Nov 1926Box 43 \ 2  Scan184
Front spring stiffness, negative camber, U-bolts, and load stresses.11th Nov 1926Box 43 \ 2  Scan185
Front axle and wheel suspension issues like 'tossing', 'tramping', and 'wobble', and proposing potential remedies.16th Nov 1926Box 43 \ 2  Scan186
Letter from the American office to Derby discussing riding quality issues, specifically front axle tramping and shimmy.2nd Dec 1926Box 43 \ 2  Scan187
Letter analysing the moment of inertia (M.I.) of various wheel and tire combinations to investigate shimmy.2nd Dec 1926Box 43 \ 2  Scan188
Front axle performance, particularly concerning braking, steering swerve, and diving.21th Dec 1926Box 43 \ 2  Scan189
Technical memorandum discussing steering and suspension issues like wheel wobble and shimmy, and proposing potential solutions.21th Dec 1926Box 43 \ 2  Scan190
Solutions for steering wobble, tramping, and brake squeak issues.21th Dec 1926Box 43 \ 2  Scan191
Letter from the American office to Derby, England, offering comments on spring suspension, specifically regarding bouncing frequency.26th Jan 1927Box 43 \ 2  Scan192
Vehicle suspension dynamics, including deflection, rebound leaves, and air springs.26th Jan 1927Box 43 \ 2  Scan193
Suspension softness, spring ratings for the 40/50 model, and a request for information on Hofmann air springs.26th Jan 1927Box 43 \ 2  Scan194
Calculation of spring stiffness and time of complete swing for two different mass-spring system configurations.28th Sep 1937Box 43 \ 2  Scan195
The design and stress calculations for the main plate of a road spring.28th Sep 1937Box 43 \ 2  Scan196
Calculations for stress, radii, and load on back plates for a spring assembly.28th Sep 1937Box 43 \ 2  Scan197
Page of calculations for spring load, section moduli, and stiffness.28th Sep 1937Box 43 \ 2  Scan198
Stress calculations, load characteristics, and manufacturing considerations for leaf springs.28th Sep 1937Box 43 \ 2  Scan199
Calculation sheet detailing stress, load, and deflection data for various plate thicknesses.28th Sep 1937Box 43 \ 2  Scan200
The analysis and calculation of leaf spring plate lengths, stiffness, and stresses.28th Sep 1937Box 43 \ 2  Scan201
Calculations for loads, stresses, and bending moments on unclipped and clipped plates with associated diagrams.28th Sep 1937Box 43 \ 2  Scan202


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