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