| Description | Date | Identifier | |
| Defending the Experimental Department's handling of tyre pressures and addressing issues of steering wobble. | 21th Aug 1925 | Box 28 \ 4 Scan319 | |
| Letter to Dunlop Rubber Co. seeking a mathematical explanation for high-speed steering wobbles. | 21th Aug 1925 | Box 28 \ 4 Scan320 | |
| Proposed hydraulic damper for the Phantom front axle to solve high-speed wobble issues. | 1st Aug 1925 | Box 28 \ 4 Scan321 | |
| High-speed steering wobbles, wheel balancing schemes, and potential solutions. | 22th Aug 1925 | Box 28 \ 4 Scan322 | |
| Continued note on testing chassis configurations to address high-speed wobbles on Silver Ghost and Phantom models. | 22th Aug 1925 | Box 28 \ 4 Scan323 | |
| Clarifying a previous communication regarding tyre pressures for open and closed body cars. | 22th Aug 1925 | Box 28 \ 4 Scan324 | |
| Query regarding steering wobbles, wheel balancing, and tyre pressures for cars with front-wheel brakes and the 'New Phantom' model. | 22th Aug 1925 | Box 28 \ 4 Scan325 | |
| High-speed steering wobbles, comparing balloon and high-pressure tyres and testing front shock absorber adjustments. | 22th Aug 1925 | Box 28 \ 4 Scan326 | |
| Responding to queries about tests in France, concerning Dunlop tyre pressures and wheel balance issues. | 22th Aug 1925 | Box 28 \ 4 Scan327 | |
| Method for balancing wheels using dummy bolts, lead washers, and Bakelite washers after a discussion with the Dunlop Company. | 22th Aug 1925 | Box 28 \ 4 Scan328 | |
| Schemes for balancing existing wheels and tyres, referencing correspondence with the Dunlop Company. | 22th Aug 1925 | Box 28 \ 4 Scan329 | |
| Letter from Dunlop Rubber Co. to Rolls Royce discussing the balancing of wheels and tyres. | 21th Aug 1925 | Box 28 \ 4 Scan330 | |
| Proposal from Dunlop Rubber Co. regarding wheel balance adjustments using dummy bolts and lead washers. | 24th Aug 1925 | Box 28 \ 4 Scan331 | |
| Technical analysis of high-speed steering wobbles, discussing wheel precession and spring frequency. | 24th Aug 1925 | Box 28 \ 4 Scan332 | |
| Letter from Dunlop discussing high speed steering wobbles and tyre balance issues. | 24th Aug 1925 | Box 28 \ 4 Scan333 | |
| Continuation letter from Dunlop Rubber Co. Ltd. discussing the causes and effects of wheel wobble in relation to tyres and road conditions. | 1st Aug 1925 | Box 28 \ 4 Scan334 | |
| Low-speed steering wobble issues in 20 HP cars fitted with 4-wheel brakes. | 1st Aug 1925 | Box 28 \ 4 Scan335 | |
| Specifications for friction devices on 20 HP pivots, with and without front wheel brakes. | 1st Aug 1925 | Box 28 \ 4 Scan336 | |
| Steering issues, instability, and diving with chassis 9-C-111, detailing causes and proposed improvements. | 1st Aug 1925 | Box 28 \ 4 Scan337 | |
| Steering wobbles, the importance of wheel balancing, and recommended tyre pressures for specific models. | 1st Aug 1925 | Box 28 \ 4 Scan338 | |
| High-speed steering wobbles, detailing calculations of amplitude and time from chronograph records. | 25th Aug 1925 | Box 28 \ 4 Scan339 | |
| Desirability of balancing the front wheels of 'Silver Ghost' cars. | 24th Aug 1925 | Box 28 \ 4 Scan340 | |
| Telegram from Hives to Mr. Royce regarding the effects of radius rods on vehicle wobbles. | 24th Aug 1925 | Box 28 \ 4 Scan341 | |
| Test for 'high speed wobble' on an axle with vertical steering pivots. | 25th Aug 1925 | Box 28 \ 4 Scan342 | |
| Letter to the Dunlop Rubber Co. discussing observations on wheel wobble with different tyre types. | 25th Aug 1925 | Box 28 \ 4 Scan343 | |
| High-speed steering wobbles and tests with hydraulic damping. | 1st Aug 1925 | Box 28 \ 4 Scan344 | |
| The results of tests on high-speed steering wobbles using different tyre pressures and damping. | 1st Aug 1925 | Box 28 \ 4 Scan345 | |
| The amplitude of wheel wobble, comparing balloon tyres with high-pressure tyres. | 1st Aug 1925 | Box 28 \ 4 Scan346 | |
| Vehicle wobble issues with balloon tyres, the use of glycerine as a hydraulic element, and frame stiffening. | 1st Aug 1925 | Box 28 \ 4 Scan347 | |
| Dispatch of a wire wheel with cosmetic balancing weights to the sales department for appearance approval. | 25th Aug 1925 | Box 28 \ 4 Scan348 | |
| Investigation into high-speed steering wobbles, specifically regarding the pivot vertical and radius rods. | 26th Aug 1925 | Box 28 \ 4 Scan349 | |
| Layout, geometry, and component suggestions for a hydraulic damper on a front axle. | 26th Aug 1925 | Box 28 \ 4 Scan350 | |
| Tests to eliminate high-speed steering wobbles using hydraulic damping. | 27th Aug 1925 | Box 28 \ 4 Scan351 | |
| Comparing standard shock absorbers with Houdaille units and testing their effect on wheel and tyre wobble. | 27th Aug 1925 | Box 28 \ 4 Scan352 | |
| Determining if the synchronization of out-of-balance front wheels affects wobbles. | 1st Aug 1925 | Box 28 \ 4 Scan353 | |
| Steering alterations, the potential acquisition of a Lancia Lambda for comparison, and high-speed wobble issues. | 27th Aug 1925 | Box 28 \ 4 Scan354 | |
| Potential modifications to improve vehicle stability, focusing on hydraulic damping, vertical pivot, and front axle weight. | 8th Aug 1925 | Box 28 \ 4 Scan355 | |
| Tests conducted to produce high speed steering wobbles on an old type axle. | 8th Aug 1925 | Box 28 \ 4 Scan356 | |
| Proposing a visit to West Wittering to demonstrate experiments on steering wobble. | 1st Aug 1925 | Box 28 \ 4 Scan357 | |
| High speed steering wobbles on an Open Trials Car, noting that the wheels were found to be out of balance. | 28th Aug 1925 | Box 28 \ 4 Scan358 | |
| Mr. Royce's disapproval of a scheme for attaching balance weights to wire wheels. | 29th Aug 1925 | Box 28 \ 4 Scan359 | |
| High-speed steering wobbles investigating the effects of Michelin wheels and centre-point steering. | 29th Aug 1925 | Box 28 \ 4 Scan360 | |
| Theory of high-speed steering wobble and a proposed apparatus for demonstration. | 29th Aug 1925 | Box 28 \ 4 Scan361 | |
| High-speed steering wobbles, conical precession theory, and the effect of tyre pressures. | 31th Aug 1925 | Box 28 \ 4 Scan362 | |
| Wheel wobble, conical precession, and the effects of tyre pressure and axle geometry. | 1st Aug 1925 | Box 28 \ 4 Scan363 | |
| Confirmatory tests for high-speed steering wobbles on a centre point axle with disc wheels. | 31th Aug 1925 | Box 28 \ 4 Scan364 | |
| From Hs to B.J. regarding the acquisition and inspection of a steering gauge. | 1st Aug 1925 | Box 28 \ 4 Scan365 | |
| Trial of a 20/60 Vauxhall, detailing modifications to reduce radiator wobble and improve engine smoothness. | 27th Jan 1930 | Box 28 \ 5 Scan001 | |
| Report discussing the elimination of radiator movement by focusing on frame rigidity and suspension modifications. | 29th Jan 1930 | Box 28 \ 5 Scan002 | |
| Experiments to solve 'radiator shimmy' by stiffening the frame, changing axles, and altering wheel sizes. | 29th Jan 1930 | Box 28 \ 5 Scan003 | |
| 'Radiator Jellying', discussing a new scheme involving single point body mounting and requesting sketches. | 15th Feb 1930 | Box 28 \ 5 Scan004 | |
| Experiments to solve the 'Frame Jellying' problem, focusing on shock absorber mounting. | 15th Feb 1930 | Box 28 \ 5 Scan005 | |
| Technical memorandum discussing the causes and potential solutions for radiator shimmy. | 10th Feb 1930 | Box 28 \ 5 Scan006 | |
| Sketch and memo detailing a suggested experiment to cure radiator shimmy and address body torsional stiffness. | 10th Feb 1930 | Box 28 \ 5 Scan007 | |
| Methods of observation used to study and reproduce the 'frame jellying' phenomenon. | 19th Feb 1930 | Box 28 \ 5 Scan008 | |
| Analysis of the nature of 'Frame Jellying', its frequency, and its relation to high-speed wobble. | 19th Feb 1930 | Box 28 \ 5 Scan009 | |
| Analysis of vehicle frame twisting, engine movement, and the phenomenon known as 'jellying' or wobbles. | 19th Feb 1930 | Box 28 \ 5 Scan010 | |
| Experiments to mitigate chassis 'Jellying' through shock damper loading and altering frame periodicity. | 19th Feb 1930 | Box 28 \ 5 Scan011 | |
| Experiments with spare wheel positioning, body attachments, and sub-frame mountings to improve vehicle damping. | 19th Feb 1930 | Box 28 \ 5 Scan012 | |
| Experiments to improve front axle assembly and steering performance, detailing ten tests that yielded no improvement. | 19th Feb 1930 | Box 28 \ 5 Scan013 | |
| Summary of investigations into chassis 'jellying' and potential remedies. | 19th Feb 1930 | Box 28 \ 5 Scan014 | |
| Instructions for fitting spare wheels and using extra damping between the scuttle and the dash. | 19th Feb 1930 | Box 28 \ 5 Scan015 | |
| Blueprint of a vehicle test rig and associated recording apparatus. | 20th Feb 1930 | Box 28 \ 5 Scan016 | |
| Blank document page with a purple ink stamp from the print room. | 20th Feb 1930 | Box 28 \ 5 Scan017 | |
| Tenth report of the design committee discussing frame jellying, rear axle failure, and battery recharging capacity. | 5th Mar 1930 | Box 28 \ 5 Scan018 | |
| Conclusions of tests aimed at resolving frame and radiator vibrations, or 'jellying'. | 12th Mar 1930 | Box 28 \ 5 Scan019 | |
| Hope of overcoming axle trouble through design improvements. | 12th Mar 1930 | Box 28 \ 5 Scan020 | |
| Explanation of measurements from various tests shown on an attached print, relating to vehicle frame, engine, and radiator movement. | 13th Mar 1930 | Box 28 \ 5 Scan021 | |
| 'Jellyfing Experiment' related to a three-point engine suspension. | 13th Mar 1930 | Box 28 \ 5 Scan022 | |
| Frame and radiator 'jellying' issues observed in the 20-HP chassis, comparing them to the Phantom II. | 20th Mar 1930 | Box 28 \ 5 Scan023 | |
| Fifteenth design committee report discussing oil filters, jellying on the Phantom car, and a compression ignition unit. | 21th Mar 1930 | Box 28 \ 5 Scan024 | |
| Test report on radiator jellying, comparing steering performance with different spring and shock absorber configurations. | 27th Mar 1930 | Box 28 \ 5 Scan025 | |
| Body distortion caused by radiator 'jellying' and the effect of torque reaction dampers. | 27th Mar 1930 | Box 28 \ 5 Scan026 | |
| Analysis of wheel wobble (shimmy) and steering reactions, detailing the causes and the adoption of an elastic shackle as a solution. | 1st Apr 1930 | Box 28 \ 5 Scan027 | |
| Modified radiator mounting scheme to resolve a 'jellying' complaint and requesting a car for testing. | 1st Apr 1930 | Box 28 \ 5 Scan028 | |
| The road testing of four cars, detailing issues with radiator jellying, engine vibration, and brake groans. | 1st Apr 1930 | Box 28 \ 5 Scan029 | |
| Vehicle's performance, noting a sticky gear change and engine roughness at high speed. | 2nd Apr 1930 | Box 28 \ 5 Scan030 | |
| Short memo concerning a radiator welling issue and the arrangement to send a car. | 2nd Apr 1930 | Box 28 \ 5 Scan031 | |
| Proposing solutions to a vehicle 'jellying' issue by adjusting damper loading and mounting points. | 5th Apr 1930 | Box 28 \ 5 Scan032 | |
| Proposed modifications to an experimental car to address frame jellying and improve engine smoothness. | 14th Apr 1930 | Box 28 \ 5 Scan033 | |
| Failure to cure 'radiator jellying' on car 1-WJ and requesting to retain the vehicle for further work. | 23th Apr 1930 | Box 28 \ 5 Scan034 | |
| Radiator 'jellying' on car 1-WJ and testing of EX cars. | 28th Apr 1930 | Box 28 \ 5 Scan035 | |
| Scheduling of a car trial and the potential for delay due to parts removal. | 30th Apr 1930 | Box 28 \ 5 Scan036 | |
| Notes on 'Jellying' tests conducted on the first PII chassis (69 W.J.) at Springfield. | 4th Apr 1930 | Box 28 \ 5 Scan037 | |
| Standardisation of chassis parts for headlamps carried off the frame and stronger wing stays. | 30th Jun 1930 | Box 28 \ 5 Scan038 | |
| Investigation into the phenomenon of radiator 'jellying', comparing it to 'high speed wobbles' and referencing the Phantom II. | 29th Apr 1930 | Box 28 \ 5 Scan039 | |
| Modifications for existing cars and a summary of engine mounting trials to eliminate vibrations on the Phantom II. | 19th Apr 1930 | Box 28 \ 5 Scan040 | |
| Analysis of flexible engine and body mountings concerning frame jellying and vibration issues. | 26th Apr 1930 | Box 28 \ 5 Scan041 | |
| Chassis and suspension development, focusing on subframe mounting, shock damper placement, and front spring stiffness. | 16th Apr 1934 | Box 28 \ 5 Scan042 | |
| Chassis dynamics, including torque reaction dampers, axle assembly, and engine mounting solutions. | 29th Apr 1930 | Box 28 \ 5 Scan043 | |
| Mitigating vehicle vibrations, specifically 'mascot jellying' and engine boom, through radiator design. | 16th Apr 1930 | Box 28 \ 5 Scan044 | |
| Test log documenting various modifications to a car to solve a 'jellyING' or vibration issue. | 30th Apr 1930 | Box 28 \ 5 Scan045 | |
| Solutions for radiator jelly, body mounting, and chassis vibration. | 15th May 1930 | Box 28 \ 5 Scan046 | |
| List of methods for insulating a vehicle from road vibrations and noise. | 5th May 1930 | Box 28 \ 5 Scan047 | |
| Dynamics of car riding and the three ways a car can oscillate: rear, front, and pitching. | 1st Jun 1930 | Box 28 \ 5 Scan048 | |
| Letter to A.G. Ionides at The Institution of Automobile Engineers regarding papers on 'Slow Speed Wobble' and 'High Speed Wobbles'. | 3rd Jun 1930 | Box 28 \ 5 Scan049 | |
| Test for a modified anti-jelly-ing scheme for engine mountings. | 28th Feb 1931 | Box 28 \ 5 Scan050 | |
| Proposal for engine mountings using a parallel motion linkage to add torsional rigidity and manage heat expansion. | 17th Mar 1931 | Box 28 \ 5 Scan051 | |
| Test report on frame jellying and steering for the Phantom II model. | 1st Apr 1931 | Box 28 \ 5 Scan052 | |
| Test report on engine booming and induction roar in car 27-EX compared to 26-EX. | 2nd Apr 1931 | Box 28 \ 5 Scan053 | |
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