| Description | Date | Identifier | |
| Enquiry about a chassis and the supply of stiffeners and subframe supports. | 15th Jul 1926 | Box 68 \ 2 scan0025 | |
| Experimental proposal for stiffening scuttle armatures using cast dashes for vehicle 12-EX. | 17th Jul 1926 | Box 68 \ 2 scan0026 | |
| Performance issues with Phantom and Goshawk engines and proposing a technical review for quality improvements. | 27th Oct 1936 | Box 68 \ 2 scan0027 | |
| Dashboard stiffness and its effect on the steering of the 7-LC chassis. | 4th Nov 1926 | Box 68 \ 2 scan0028 | |
| Design schemes for heating under the rear footboards on the Phantom model. | 29th Nov 1926 | Box 68 \ 2 scan0029 | |
| Design and advantages of a new cast dash and bonnet. | 1st Dec 1926 | Box 68 \ 2 scan0030 | |
| Stiffness of a dashboard and its relation to steering gear rigidity and material hardness. | 2nd Dec 1926 | Box 68 \ 2 scan0031 | |
| Meeting to discuss cast dash and bonnet design. | 1st Dec 1926 | Box 68 \ 2 scan0032 | |
| Modifications to the Phantom bonnet and an improved fastener. | 9th Dec 1926 | Box 68 \ 2 scan0033 | |
| Engine vibration issues and the design of a cast dashboard for the Phantom model. | 16th Dec 1926 | Box 68 \ 2 scan0034 | |
| Design of a Phantom cast dashboard and its effect on the length of the bonnet. | 17th Dec 1926 | Box 68 \ 2 scan0035 | |
| Potential standardisation of a cast dash for the Phantom model. | 17th Dec 1926 | Box 68 \ 2 scan0036 | |
| Performance, manufacturing, and cost of a cast dash for the Phantom & India models following a 10,000-mile test. | 6th Sep 1927 | Box 68 \ 2 scan0037 | |
| The design of a cast dashboard for the Phantom model, requesting information and suggesting experiments. | 28th Sep 1927 | Box 68 \ 2 scan0038 | |
| The weights and costs of Cast and Plate Type dashboards for Phantom & 20 HP models. | 5th Oct 1927 | Box 68 \ 2 scan0039 | |
| Features and specifications for the Sports series EAC.14 Phantom. | 13th Oct 1927 | Box 68 \ 2 scan0040 | |
| Modifications for the Sports Phantom chassis, including a cast dash, shorter radiator, and a shortened bonnet. | 10th Oct 1927 | Box 68 \ 2 scan0041 | |
| Requesting a set of parts from a sketch to be fitted to car 10-EX, with notes on dashboard modifications. | 21th Nov 1927 | Box 68 \ 2 scan0042 | |
| Modifications to the cast dash on model 12-EX. | 3rd Mar 1928 | Box 68 \ 2 scan0043 | |
| Experiments conducted on a bump rig to measure steering column and cast dashboard deflection and movement. | 16th Apr 1928 | Box 68 \ 2 scan0044 | |
| Report discussing steering column deflection, suggesting dash modifications based on tests from various experimental cars. | 16th Apr 1928 | Box 68 \ 2 scan0045 | |
| Test results for steering column movement under various chassis conditions on a bumping rig. | 17th Oct 1939 | Box 68 \ 2 scan0046 | |
| Blueprint of an experimental stiffener for cast dash bumping tests. | 17th Oct 1939 | Box 68 \ 2 scan0047 | |
| Design of a dashboard-mounted pump for a centralised chassis lubrication system. | 28th Jun 1928 | Box 68 \ 2 scan0048 | |
| The dashboard pump for centralised chassis lubrication on Phantom and India cars. | 7th Jul 1928 | Box 68 \ 2 scan0049 | |
| Pros and cons of a proposed scuttle and dash isolation scheme versus an alternative 'free scheme'. | 1st Aug 1928 | Box 68 \ 2 scan0050 | |
| And seeking instruction on two different methods of scuttle and dash isolation for the Phantom and 20 HP chassis. | 1st Aug 1928 | Box 68 \ 2 scan0051 | |
| Instructions and the positioning of the 'W' series vacuum tank and radiator. | 20th Jul 1925 | Box 68 \ 2 scan0052 | |
| Issues caused by the vacuum feed system on various models, including performance and fuel consumption. | 24th Jul 1925 | Box 68 \ 2 scan0053 | |
| Investigations into vacuum feed, petrol economy, and fuel distribution issues on the 40/50 and 20 HP models. | 10th Aug 1925 | Box 68 \ 2 scan0054 | |
| Slow running behaviour of the New Phantom and 20 HP vacuum feed systems, with suggestions for carburetter improvements. | 1st Aug 1925 | Box 68 \ 2 scan0055 | |
| Potential causes for a rich fuel mixture in a vacuum feed tank and requesting data for a new design. | 11th Aug 1925 | Box 68 \ 2 scan0056 | |
| Issues with a modified suction elbow and proposing a new autovac mechanism for the New Phantom vacuum feed tank. | 17th Aug 1925 | Box 68 \ 2 scan0057 | |
| Tests to eliminate engine fading by using a non-return valve in the 'Phantom' vacuum feed system. | 12th Oct 1925 | Box 68 \ 2 scan0058 | |
| New elbows for the Autovac system designed to reduce engine misfiring. | 11th Nov 1925 | Box 68 \ 2 scan0059 | |
| Explaining the suction difference in the Autovac system due to a non-return valve. | 13th Nov 1925 | Box 68 \ 2 scan0060 | |
| New Phantom Induction Pipe and Autovac Union, referencing previous departmental correspondence and reports. | 8th Mar 1926 | Box 68 \ 2 scan0061 | |
| Broken induction pipe fittings for the Autovac and windscreen wiper due to issues with the cap nut. | 1st Mar 1926 | Box 68 \ 2 scan0062 | |
| Standardisation of a special valve for the Autovac to reduce its effect on slow running. | 22th Apr 1926 | Box 68 \ 2 scan0063 | |
| Air lock issue in the reserve fuel tank of the 11-EX car and the correct starting procedure. | 1st Aug 1926 | Box 68 \ 2 scan0064 | |
| LeC.2478, which shows details for the vacuum pump for the petrol feed and wheelcase. | 28th Oct 1927 | Box 68 \ 2 scan0065 | |
| Proposal to cancel the standardisation sheet for a larger diameter petrol pipe. | 11th Jul 1927 | Box 68 \ 2 scan0066 | |
| Petrol shortage complaints in Phantom & 20 HP chassis, attributing the issue to air locks in the petrol pipe. | 25th Nov 1927 | Box 68 \ 2 scan0067 | |
| Confirming that the downward slope of a petrol pipe is being increased. | 29th Nov 1927 | Box 68 \ 2 scan0068 | |
| Arrangements to alter petrol pipes on the Phantom & 20 HP chassis. | 29th Nov 1927 | Box 68 \ 2 scan0069 | |
| Routing and bore of the petrol pipe from the autovac to the filter. | 30th Nov 1927 | Box 68 \ 2 scan0070 | |
| New issue of blocked induction petrol drain pipes, possibly due to regional petrol quality. | 26th Jan 1928 | Box 68 \ 2 scan0071 | |
| Gas generated in the petrol feed pipe on a Phantom Chassis and a proposed solution to reroute it away from the exhaust. | 23th Oct 1928 | Box 68 \ 2 scan0072 | |
| Petrol supply failures on test cars due to exhaust heat and a proposed modification. | 17th Nov 1928 | Box 68 \ 2 scan0073 | |
| Investigation into petrol supply failures on the Phantom model caused by petrol gasification and air locks. | 16th Nov 1928 | Box 68 \ 2 scan0074 | |
| Modifications to the autovac system to prevent air locks and ensure consistent petrol supply. | 19th Nov 1928 | Box 68 \ 2 scan0075 | |
| Diagram illustrating a modification to increase a release hole to .137, showing petrol and air lines. | 19th Nov 1928 | Box 68 \ 2 scan0076 | |
| Issues and comparisons of different fuel filter types, including Zenith, Cuno, and Enots. | 10th Sep 1929 | Box 68 \ 2 scan0077 | |
| Recommendation to experimentally revive a suction filter for safety reasons on model 3101. | 17th Aug 1925 | Box 68 \ 2 scan0078 | |
| Causes and potential solutions for high and low-speed steering wobbles. | 17th Aug 1925 | Box 68 \ 2 scan0079 | |
| Report discussing vehicle axle dampers, steering wobble, and various friction damping methods. | 17th Aug 1925 | Box 68 \ 2 scan0080 | |
| The mechanical friction required in steering to prevent high-speed wobbles and driver fatigue. | 26th Aug 1925 | Box 68 \ 2 scan0081 | |
| Layout, geometry, and modifications for a hydraulic damper on the front axle. | 26th Aug 1925 | Box 68 \ 2 scan0082 | |
| Secret memo outlining proposed steering improvements for the New Phantom and Goshawk models to correct wobbles. | 28th Aug 1925 | Box 68 \ 2 scan0083 | |
| Causes and potential solutions for high-speed steering wobbles, including inertia damping and gyroscopic effects. | 1st Sep 1925 | Box 68 \ 2 scan0084 | |
| Gyrostatis movements, dampers, and weight reduction on the 40/50 car. | 1st Sep 1925 | Box 68 \ 2 scan0085 | |
| Modifications to the steering system, including slower ratios and addressing high-speed wobbles. | 1st Sep 1925 | Box 68 \ 2 scan0086 | |
| Parts sourcing, pendulum lever specifications, and the design of a hydraulic shock damper for the New Phantom. | 1st Sep 1925 | Box 68 \ 2 scan0087 | |
| Arranging the testing of Berkshire hydraulic shock dampers from the Houdaille Co. | 1st Sep 1925 | Box 68 \ 2 scan0088 | |
| Requesting samples of hydraulic shock dampers for evaluation. | 5th Sep 1925 | Box 68 \ 2 scan0089 | |
| Three types of shock absorbers (Standard, Houdaille, and a new type) for chassis 98-NK. | 5th Sep 1925 | Box 68 \ 2 scan0090 | |
| Load setting of front shock absorbers and recommending a hydraulic type over the friction type. | 10th Sep 1925 | Box 68 \ 2 scan0091 | |
| Design and patent implications of a new hydraulic shock damper for the Phantom model. | 1st Sep 1925 | Box 68 \ 2 scan0092 | |
| Setup and future testing of various shock dampers for the Phantom and 20 HP models. | 23th Sep 1925 | Box 68 \ 2 scan0093 | |
| Bump test report comparing Derihon, Houdaille, and Berkshire shock absorbers. | 25th Sep 1925 | Box 68 \ 2 scan0094 | |
| Test results and general notes on various shock absorbers, including Derihon, Berkshires, D.N's, and Houdailles. | 26th Sep 1925 | Box 68 \ 2 scan0095 | |
| The performance of three types of hydraulic shock absorbers. | 26th Sep 1925 | Box 68 \ 2 scan0096 | |
| The testing of shock absorbers and their reliability in alleviating wobbles. | 1st Oct 1925 | Box 68 \ 2 scan0097 | |
| Testing and modification proposals for EAC & Goshawk front shock absorbers. | 1st Oct 1925 | Box 68 \ 2 scan0098 | |
| Questioning the suitability of the current shock-absorber design for proposed standardisation changes on the Phantom and 20 HP models. | 14th Oct 1925 | Box 68 \ 2 scan0099 | |
| Standardisation sheet discussing the modification of shock absorber springs to obtain extra load. | 16th Oct 1925 | Box 68 \ 2 scan0100 | |
| Standard for tightening shock-absorbers to prevent customer disappointment and complaints. | 22th Oct 1925 | Box 68 \ 2 scan0101 | |
| New hydraulic shock dampers for the Phantom model, referencing drawing N.sch.2085. | 7th Nov 1925 | Box 68 \ 2 scan0102 | |
| The mounting of a new 40/50 hydraulic shock absorber. | 13th Nov 1925 | Box 68 \ 2 scan0103 | |
| Requesting details on the modification of the front shock absorber adjustment for 40/50 & 20 HP chassis parts standardisation. | 20th Nov 1925 | Box 68 \ 2 scan0104 | |
| Unusual features of a new hydraulic shock damper design. | 20th Nov 1925 | Box 68 \ 2 scan0105 | |
| The failure of hydraulic shock absorbers during a bump rig test. | 25th Nov 1925 | Box 68 \ 2 scan0106 | |
| Diagram showing the results of an endurance test on a hydraulic shock damper. | 25th Nov 1924 | Box 68 \ 2 scan0107 | |
| The testing of various springs for EAC & Goshawk front shock absorbers. | 26th Nov 1925 | Box 68 \ 2 scan0108 | |
| Specification sheet detailing spring ratings and shock absorber loads for various spring models. | 26th Nov 1925 | Box 68 \ 2 scan0109 | |
| Requesting the testing of piston-type hydraulic shock absorbers. | 23th Jan 1926 | Box 68 \ 2 scan0110 | |
| Gearing change to an inertia damper to improve its function in preventing high-speed steering wobbles. | 26th Jan 1926 | Box 68 \ 2 scan0111 | |
| Testing new piston-type hydraulic shock absorbers and issues with trapped air when filling them with oil. | 2nd Feb 1926 | Box 68 \ 2 scan0112 | |
| Tests conducted on hydraulic shock absorbers to diagnose and resolve an air-induced chatter issue. | 1st Feb 1926 | Box 68 \ 2 scan0113 | |
| Chatter issue with shock absorbers caused by air re-entering the high-pressure chamber. | 10th Feb 1926 | Box 68 \ 2 scan0114 | |
| Suggestions for modifying a hydraulic shock absorber valve to prevent oscillation and improve oil flow. | 10th Feb 1926 | Box 68 \ 2 scan0115 | |
| Continued discussion on a valve, trapped air in the piston chamber, and oil circulation. | 2nd Feb 1926 | Box 68 \ 2 scan0116 | |
| Eliminating chatter in hydraulic shock absorbers and the results of initial tests. | 2nd Feb 1926 | Box 68 \ 2 scan0117 | |
| Suggested modification to a hydraulic shock absorber, with a cutaway view of the valve assembly. | 9th Feb 1926 | Box 68 \ 2 scan0118 | |
| Rivet failure on Hartford shock absorbers on Lord Montagu's car, and a discussion on alternatives. | 13th Feb 1926 | Box 68 \ 2 scan0119 | |
| Required improvements and patentable designs for hydraulic shock dampers. | 13th Feb 1926 | Box 68 \ 2 scan0120 | |
| List of features for double-acting shock absorbers and notes on modifications. | 18th Feb 1926 | Box 68 \ 2 scan0121 | |
| Increasing the poundage on front shock absorbers for 20 HP Chassis & Phantoms. | 18th Feb 1926 | Box 68 \ 2 scan0122 | |
| Hydraulic shock dampers, their effectiveness against steering wobble, and a suggested modification to a relief valve. | 19th Feb 1926 | Box 68 \ 2 scan0123 | |
| Hydraulic shock absorbers, detailing a test failure of a lever and subsequent modifications. | 25th Feb 1926 | Box 68 \ 2 scan0124 | |
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