| Description | Date | Identifier | |
| The standardization of rolled eye chassis rear springs for the 40/50 HP model. | 18th Feb 1930 | Box 67a \ 2 scan0256 | |
| The standardisation and performance of large deflection front springs for the Phantom 1. | 10th Mar 1930 | Box 67a \ 2 scan0257 | |
| Letter requesting a special pair of Phantom I front springs with detailed specifications for urgent tests. | 17th Dec 1929 | Box 67a \ 2 scan0258 | |
| Standardisation of chassis parts by adopting drilled HP shock absorber valves and lubricating Phantom I springs with grooves. | 20th Nov 1929 | Box 67a \ 2 scan0259 | |
| The experimental testing of rear road springs for the 40/50 HP chassis, detailing issues with clip positioning. | 21th Mar 1930 | Box 67a \ 2 scan0260 | |
| Standardisation of chassis parts, specifically low-rating front road springs. | 10th Mar 1930 | Box 67a \ 2 scan0261 | |
| Road spring lubrication schemes and proposed improvements for 20 HP and 40/50 models. | 25th Apr 1930 | Box 67a \ 2 scan0262 | |
| Comparing the car springing of American and English vehicles. | 2nd Jul 1930 | Box 67a \ 2 scan0263 | |
| Continued note discussing tyre complaints and a disagreement on modifying shock damper valves. | 2nd Jul 1930 | Box 67a \ 2 scan0264 | |
| Car springing with increased deflection to improve riding qualities. | 27th Nov 1930 | Box 67a \ 2 scan0265 | |
| Internal order for Phantom 1 front and rear road springs with specific technical requirements. | 28th Jan 1931 | Box 67a \ 2 scan0266 | |
| Requesting modifications to the steering nuts and cages on Sports Phantom cars to resolve an issue at full lock. | 6th Jan 1928 | Box 68 \ 1 scan0001 | |
| Production difficulties in obtaining a free steering due to issues with the .900 lead large diameter nut and worm. | 1st Jan 1928 | Box 68 \ 1 scan0002 | |
| The difficulty with a larger experimental worm of .900 pitch steering component. | 7th Jan 1928 | Box 68 \ 1 scan0003 | |
| Requesting steering adjustments for the 8-EX car. | 18th Jan 1928 | Box 68 \ 1 scan0004 | |
| Requesting an alteration to the steering of Geoffrey Summers' car by fitting a shorter pendulum lever. | 23th Jan 1928 | Box 68 \ 1 scan0005 | |
| Engine torque reaction and vibration testing with a modified rubber block engine mounting. | 25th Jan 1928 | Box 68 \ 1 scan0006 | |
| Letter to a customer regarding the fitting of a shorter pendulum lever to improve steering and reduce road shocks. | 27th Jan 1928 | Box 68 \ 1 scan0007 | |
| Confirming the delivery of experimental car 10-EX, noting its steering column and parts for 'pick up' vibration. | 2nd Feb 1928 | Box 68 \ 1 scan0008 | |
| Recommending production of a shortened nut for the Phantom steering system following successful testing. | 1st Feb 1928 | Box 68 \ 1 scan0009 | |
| Proposal to modify the pendulum lever by repositioning the ball pin to the outside. | 6th Feb 1928 | Box 68 \ 1 scan0010 | |
| Tests on a 9.5' pendulum lever for steering. | 9th Feb 1928 | Box 68 \ 1 scan0011 | |
| Modifications to the Phantom steering, specifically a shortened pendulum lever and side steering tube. | 14th Feb 1928 | Box 68 \ 1 scan0012 | |
| Instructions for fitting a shortened pendulum lever to a Phantom chassis. | 16th Feb 1928 | Box 68 \ 1 scan0013 | |
| Driving position for the Continental Phantom, recommending adjustable steering options for owner drivers. | 8th Feb 1928 | Box 68 \ 1 scan0014 | |
| Technical letter discussing steering issues, frame twist, and high-speed wobbling on experimental car models. | 20th Feb 1928 | Box 68 \ 1 scan0015 | |
| Modifications to steering and suspension to improve handling and cure bumping. | 22th Feb 1928 | Box 68 \ 1 scan0016 | |
| Instructions for fitting a shortened pendulum lever to the steering system of an experimental chassis. | 22th Feb 1928 | Box 68 \ 1 scan0017 | |
| Scheme for fitting a 9.5' shortened pendulum lever to old type Phantom models. | 1st Feb 1928 | Box 68 \ 1 scan0018 | |
| Steadiness and optimal length of the Phantom Sports steering column. | 1st Mar 1928 | Box 68 \ 1 scan0019 | |
| Sizing and positioning of the Phantom steering wheel for driver ergonomics. | 3rd May 1928 | Box 68 \ 1 scan0020 | |
| Instructions for fitting a shorter pendulum lever to Phantom Chassis 117-MC. | 8th Mar 1928 | Box 68 \ 1 scan0021 | |
| Fitting of a shorter pendulum lever and part updates for Phantom Chassis 117-MC. | 10th Mar 1928 | Box 68 \ 1 scan0022 | |
| Response to a part failure, proposing an increase in column diameter and assessing the safety of stretching near a brazed joint. | 10th Mar 1928 | Box 68 \ 1 scan0023 | |
| Steering system tests, specifically a larger diameter worm and nut, and recommendations for future design. | 14th Mar 1928 | Box 68 \ 1 scan0024 | |
| Technical memorandum discussing steering system designs, ratios, and performance comparisons with a Buick. | 19th Jul 1927 | Box 68 \ 1 scan0025 | |
| Continued discussion on irreversibility and efficiency related to 'joggles' and 'parking', including a table of typical measurements. | 19th Jul 1927 | Box 68 \ 1 scan0026 | |
| Requesting the setup of two friction pivot schemes on experimental cars 10-EX and 12-EX. | 16th Mar 1928 | Box 68 \ 1 scan0027 | |
| Modifications to the steering system for the 12-EX model. | 16th Mar 1928 | Box 68 \ 1 scan0028 | |
| Steering modifications and parts fitted to car 117-MC for Mr. Geoffrey Summers. | 16th Mar 1928 | Box 68 \ 1 scan0029 | |
| Report comparing the efficiency and performance of different steering worm gears. | 22th Mar 1928 | Box 68 \ 1 scan0030 | |
| Steering system design, focusing on worm and nut types, helix angles, and solutions for road shocks and vibrations. | 19th Jul 1927 | Box 68 \ 1 scan0031 | |
| Analysis of steering friction with different axle arrangements and a proposed scheme for sports cars. | 28th Mar 1928 | Box 68 \ 1 scan0032 | |
| General review and experimental notes on steering systems, focusing on large worm gears and damping friction. | 28th Mar 1928 | Box 68 \ 1 scan0033 | |
| Steering and suspension improvements, focusing on friction, damping, steering ratios, and weight reduction. | 31th Mar 1928 | Box 68 \ 1 scan0034 | |
| Modification to the steering pivot to reduce road shocks at high speeds for the 20 HP & 40/50 models. | 31th Mar 1928 | Box 68 \ 1 scan0035 | |
| Potential changes to steering geometry and components for J, F, and M series vehicles. | 1st Apr 1928 | Box 68 \ 1 scan0036 | |
| Outlining objections to irreversible steering, discussing high-speed wobble, self-centering, and part failures. | 4th Apr 1928 | Box 68 \ 1 scan0037 | |
| Analysis of steering wobble, discussing steering ratios, king pin geometry, and proposed solutions. | 4th Apr 1928 | Box 68 \ 1 scan0038 | |
| Continuation page of a memo regarding steering satisfaction in France. | 12th Apr 1928 | Box 68 \ 1 scan0039 | |
| Comparison of steering ratios between various American cars and Rolls-Royce models, with commentary on steering design. | 12th Apr 1928 | Box 68 \ 1 scan0040 | |
| Acquisition of a 1927 straight-eight Bugatti to study its steering and road holding characteristics. | 12th Apr 1928 | Box 68 \ 1 scan0041 | |
| Steering ratios and flexibility, comparing current designs to competitors and addressing a specific customer complaint. | 16th Apr 1928 | Box 68 \ 1 scan0042 | |
| Parts required for a Phantom Chassis steering conversion. | 17th Apr 1928 | Box 68 \ 1 scan0043 | |
| Modifications to the 20 HP model to improve its appearance and handling by lowering the steering. | 18th Apr 1928 | Box 68 \ 1 scan0044 | |
| Steering column geometry and lever modifications for 'M' and 'N' series chassis. | 19th Apr 1928 | Box 68 \ 1 scan0045 | |
| Steering improvements for the Phantom model, with comparisons to Bentley and Hispano vehicles and customer feedback. | 1st Apr 1928 | Box 68 \ 1 scan0046 | |
| Continued discussion on steering characteristics, skidding, low-geared steering on models like the Phantom, and comparisons to Bugatti. | 25th Apr 1928 | Box 68 \ 1 scan0047 | |
| Improvements for the Phantom steering system, comparing ratios and flexibility with Hispano's and suggesting hydraulic damping. | 25th Apr 1928 | Box 68 \ 1 scan0048 | |
| Steering gear specifications for present production, F.2 conversion, and 'SS' models. | 28th Apr 1928 | Box 68 \ 1 scan0049 | |
| Modifications to the Phantom steering pendulum levers, increasing the length from 9.5' to 10'. | 1st May 1928 | Box 68 \ 1 scan0050 | |
| Proposal for steering and suspension modifications and tests on car 98-NK. | 2nd May 1928 | Box 68 \ 1 scan0051 | |
| Suggestion to add a groove to the steering column to aid oiling of the felt packings for the Phantom chassis. | 2nd May 1928 | Box 68 \ 1 scan0052 | |
| Change in steering ratio by altering the worm and nut lead instead of the pendulum lever. | 7th May 1928 | Box 68 \ 1 scan0053 | |
| Implementation of 825 lead steering nuts versus the 940 lead conversion. | 9th May 1928 | Box 68 \ 1 scan0054 | |
| Steering ratio complaints, potential solutions involving pendulum levers and worms, and spring ratings to prevent wobbles. | 8th May 1928 | Box 68 \ 1 scan0055 | |
| Comparison table of specifications for various steering system conversions, aiming to resolve complaints. | 1st May 1928 | Box 68 \ 1 scan0056 | |
| Standardisation of chassis parts for a 9.5' pendulum lever with otherwise standard steering. | 24th Mar 1928 | Box 68 \ 1 scan0057 | |
| Logistics and costs for fitting a new part to a chassis. | 9th Jun 1928 | Box 68 \ 1 scan0058 | |
| Modifications and performance of the 40/50 HP steering system. | 14th May 1928 | Box 68 \ 1 scan0059 | |
| Report discussing the reduction of ball pin travel to improve steering control and prevent high-speed wobbles. | 17th May 1928 | Box 68 \ 1 scan0060 | |
| The cause and potential solutions for steering wheel 'joggling' on the Phantom model. | 17th May 1928 | Box 68 \ 1 scan0061 | |
| Instruction for steering conversions on a Phantom chassis, detailing the required parts. | 22th May 1928 | Box 68 \ 1 scan0062 | |
| Steering issues related to balloon tyres, recommending a minimum pressure of 40 lbs/sq.in and the fitting of Hartford dampers. | 24th May 1928 | Box 68 \ 1 scan0063 | |
| Technical note on the spring-loaded cross steering tube and its retrospective fitting. | 25th May 1928 | Box 68 \ 1 scan0064 | |
| Ongoing criticisms of steering systems and comparisons with competitors' designs. | 25th May 1928 | Box 68 \ 1 scan0065 | |
| Continued discussion on steering performance, comparing the 20 HP and 40/50 models against competitors and considering factors like speed and parking. | 2nd Jun 1928 | Box 68 \ 1 scan0066 | |
| Request for advice and recommendations regarding Dunlop low pressure tyres in India. | 2nd Jun 1928 | Box 68 \ 1 scan0067 | |
| Steering difficulty and wear issue, which has been referred to Messrs. Dunlops and Sir Reginald Ford for investigation. | 1st Jun 1928 | Box 68 \ 1 scan0068 | |
| Complaints about balloon tyres affecting steering, mandating a minimum pressure of 40 lbs/sq.in. | 1st Jun 1928 | Box 68 \ 1 scan0069 | |
| Advising not to proceed with the 9' lever at the present time. | 1st Jun 1928 | Box 68 \ 1 scan0070 | |
| The steering performance of a Phantom Trials Sedanca, chassis 81-RP, after a drive to Cambridge. | 12th Jun 1928 | Box 68 \ 1 scan0071 | |
| Solutions for a steering problem, including a spring damped pendulum and hydraulic arrangements. | 15th Jun 1928 | Box 68 \ 1 scan0072 | |
| The weakness of Dunlop low-pressure tyres for hunting in India and recommendations for special equipment. | 23th Jul 1928 | Box 68 \ 1 scan0073 | |
| Wheel centrepoint testing and modifications to steering and suspension components. | 24th Jul 1928 | Box 68 \ 1 scan0074 | |
| Technical note discussing shock absorber loads, spring ratings, and ball end movement. | 1st Aug 1928 | Box 68 \ 1 scan0075 | |
| Steering improvements on the American Phantom, potential wobble issues with smaller wheels, and new adjustable shock absorbers. | 1st Aug 1928 | Box 68 \ 1 scan0076 | |
| Tests conducted on a Phantom to determine the effectiveness of repositioning shock absorbers to prevent high-speed wobbles. | 13th Nov 1928 | Box 68 \ 1 scan0077 | |
| Naming conventions for improved steering column positions. | 21th Nov 1928 | Box 68 \ 1 scan0078 | |
| The standardisation of semi-isolation to prevent jellying of the scuttle and support the steering column. | 5th Jan 1929 | Box 68 \ 1 scan0079 | |
| Issues with side steering tube ends on SS cars following a 10,000-mile test. | 22th Jan 1929 | Box 68 \ 1 scan0080 | |
| Steering issues like 'tramping' and 'joggles' and proposed solutions for achieving perfect geometry. | 29th Aug 1929 | Box 68 \ 1 scan0081 | |
| Design committee report discussing the hot well pump, steering column, and foot brakes. | 14th Feb 1930 | Box 68 \ 1 scan0082 | |
| Tests on hydraulic steering shock dampers for a lighter axle, comparing different load settings. | 8th Oct 1926 | Box 68 \ 1 scan0083 | |
| Undesirable features and test results of a hydraulic steering damper. | 12th Oct 1926 | Box 68 \ 1 scan0084 | |
| Continued discussion on steering damper characteristics, comparing frictional load versus hydraulic damping. | 11th Oct 1926 | Box 68 \ 1 scan0085 | |
| Design and function of hydraulic dampers for a steering system, focusing on lean of pivots and wobble prevention. | 11th Oct 1926 | Box 68 \ 1 scan0086 | |
| Suggestion to obtain one dozen solid cork gland packings for a damper to resolve an oil leakage issue. | 12th Oct 1926 | Box 68 \ 1 scan0087 | |
| Design objectives and limitations of the longitudinal tube ball end for steering systems. | 11th Nov 1926 | Box 68 \ 1 scan0088 | |
| Scheme for a spring on a hydraulic steering damper filter. | 20th Nov 1926 | Box 68 \ 1 scan0089 | |
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