| Description | Date | Identifier | |
| Graph and explanation comparing the temperature performance of three different 'hot spot' systems. | 12th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan87 | |
| Comparison of standard exhaust heated and simple water hot spot systems, including a graph of average working temperatures at full throttle. | 12th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan88 | |
| Report page presenting a table and analysis of induction pipe temperatures under standard exhaust, water, and superheated conditions. | 14th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan89 | |
| Tests examining the influence of hot spot temperature on engine power and efficiency. | 14th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan90 | |
| Graph and typed analysis comparing specific fuel consumption against brake mean effective pressure for various engine heating systems. | 14th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan91 | |
| Performance analysis and graph comparing fuel consumption of different throttle heating systems at 1500 RPM. | 14th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan92 | |
| Report page analyzing engine efficiency and heat transfer, comparing a standard system with others by referencing test curves. | 14th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan93 | |
| Report page with a graph analyzing heat flow in relation to engine speed (RPM) and water flow. | 14th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan94 | |
| Tests measuring heat added to the cooling system and the influence of hot spot temperature on engine detonation. | 14th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan95 | |
| Analysis of engine performance, detonation, and fuel volatility under different heating and fuel conditions. | 14th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan96 | |
| Report page comparing engine warm-up systems, with a graph showing temperature drop versus RPM. | 14th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan97 | |
| Analysis of heat added to the engine cooling system, its effect on power and efficiency, and disadvantages of the standard system. | 14th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan98 | |
| Report concluding that resolving the rattling and sticking of the exhaust throttle valve would create a satisfactory pre-heating system. | 14th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan99 | |
| Diagrams showing the apparatus used for testing a superheated throttle and for measuring water flows. | 12th Feb 1925 | West Wittering \ O \ 2January1926-March1926 Scan100 | |
| Eliminating chatter in hydraulic shock absorbers through proper filling, with test results and weight comparisons. | 2nd Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan101 | |
| Diagram showing a suggested modification to a hydraulic shock absorber. | 1st Feb 1928 | West Wittering \ O \ 2January1926-March1926 Scan102 | |
| The effect of wind on the maximum speeds of touring cars. | 15th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan103 | |
| Graph and text explaining the effect of wind on a car's maximum speed and required horsepower. | 15th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan104 | |
| With a graph explaining the horsepower required to overcome wind resistance at various speeds. | 15th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan105 | |
| The efficiency of ignition controls and tests on the ignition oil relay. | 15th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan106 | |
| Test report on piston efficiency compared to standard cup leather, with an accompanying mechanical diagram. | 15th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan107 | |
| Test report comparing the load lifting capabilities of various piston configurations. | 15th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan108 | |
| Efficiency of an oil relay and testing related components like magnetos and controls. | 15th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan109 | |
| The load requirements and mechanics for the magneto and distributor control system, including diagrams. | 15th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan110 | |
| Analysis of magneto sleeve friction and the characteristics of the ignition governor and its oil relay. | 15th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan111 | |
| The behavior of a high-pressure piston under reduced load, with a corresponding blueprint. | 15th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan112 | |
| Technical analysis of piston movement, oil pressure, and ignition timing under load, including a data table. | 16th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan113 | |
| Comparative test report on Marles steering versus the latest Phantom steering. | 16th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan114 | |
| Comparison of steering gear efficiency and ratios between Marles, E.A.C., and Rolls-Royce systems. | 16th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan115 | |
| Comparison of the relative irreversibility of 'Good EAC' and 'Marles' steering systems. | 1st Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan116 | |
| Attempts to increase power on the 20 HP engine, detailing test results and chassis weight additions. | 1st Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan118 | |
| Experiments to increase the power output of a 20 HP engine by employing a larger carburettor throttle and induction passage. | 17th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan119 | |
| Carburetter throttle and throat size experiments and their effect on engine power output. | 15th Jan 1925 | West Wittering \ O \ 2January1926-March1926 Scan120 | |
| Carburettor testing and performance issues, particularly at low depressions. | 15th Jan 1925 | West Wittering \ O \ 2January1926-March1926 Scan121 | |
| Report page discussing carburetter testing, mixture richness, and power output. | 15th Jan 1925 | West Wittering \ O \ 2January1926-March1926 Scan122 | |
| Performance comparison between a standard carburettor and a diffuser jet carburettor. | 15th Jan 1925 | West Wittering \ O \ 2January1926-March1926 Scan123 | |
| Summary of experimental results for a 20 HP carburetter with various modifications. | 15th Jan 1925 | West Wittering \ O \ 2January1926-March1926 Scan124 | |
| Report summarizing experiments investigating power loss in the 20 HP engine. | 17th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan125 | |
| The failure and modification of hydraulic shock absorber links following testing. | 17th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan126 | |
| Tests on hydraulic shock dampers to determine the minimum loading required to prevent high-speed steering wobbles. | 2nd Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan127 | |
| Investigation into front wheel wobble and the effect of toe-in. | 2nd Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan128 | |
| Research into front wheel wobble, referencing US manufacturers and proposing adjustments to wheel toe-in as a solution. | 2nd Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan129 | |
| Proposing to send a pair of hydraulic shock absorbers to be fitted to a 7-EX car. | 2nd Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan130 | |
| The testing of hydraulic shock absorbers, detailing a lever fracture, subsequent strengthening, and persistent oil leaks. | 24th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan131 | |
| The testing of special Woodhead front road springs with rebound leaves. | 25th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan132 | |
| The testing of hydraulic shock absorbers, focusing on oil leakage and chatter issues. | 2nd Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan133 | |
| Different packings, strengthened pressings, and the use of ordinary engine oil in shock absorbers. | 1st Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan134 | |
| Production difficulties and efficiency issues with the New Phantom steering system, particularly its failure to self-centre. | 1st Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan135 | |
| Visit to Le Canadel, the progress of an EAC.Vlll chassis, and the specifications for a 20 HP car being prepared for France. | 1st Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan136 | |
| Continued internal memorandum discussing car alterations and arrangements. | 3rd May 1926 | West Wittering \ O \ 2January1926-March1926 Scan137 | |
| The effects of hydraulic shock absorbers on vehicle springing, wobble, and steering. | 3rd May 1926 | West Wittering \ O \ 2January1926-March1926 Scan138 | |
| Axle wobble, shock absorbers, and steering performance on the 40/50 HP model. | 3rd May 1926 | West Wittering \ O \ 2January1926-March1926 Scan139 | |
| Road test on hydraulic shock dampers to investigate oil leakage from the gland. | 1st Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan140 | |
| Troubleshooting oil leaks and frothing in dampers by testing different fluids and mechanical solutions. | 1st Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan141 | |
| Improvements and tests on hydraulic shock dampers, including a temporary arrangement diagram. | 1st Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan142 | |
| Mileage tests of battery ignition coils in redmanol cases, comparing them to standard stabalite cases. | 4th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan143 | |
| Progress report on tests conducted on tungsten contact points. | 4th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan144 | |
| Replacement of fibre washers with aluminium ones. | 5th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan145 | |
| Experiments to overcome chattering and oil leakage in hydraulic shock dampers. | 6th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan146 | |
| Experiment investigating oil expansion and leakage in a component when heated. | 6th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan147 | |
| Road tests to determine shock damper working temperatures and gland efficiency tests to prevent oil leakage. | 6th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan148 | |
| Shaft bearing gland testing to prevent oil leakage, with diagrams of the test rig and gland assembly. | 6th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan149 | |
| Road tests on a spring-loaded gland and asbestos packing types. | 3rd Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan150 | |
| The successful testing of a new asbestos and graphite packing material for shock dampers. | 3rd Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan151 | |
| 'Phantom Springing' tests, concluding that stiffer front shock absorbers increase pitching and discomfort for rear seat passengers. | 10th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan152 | |
| Investigation into engine detonation on Phantom engines, comparing them to the Silver Ghost and identifying lack of turbulence as the root cause. | 11th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan153 | |
| Comparing engine performance issues and potential improvements for the Phantom and Silver Ghost models. | 11th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan154 | |
| Engine detonation tests, investigating the effects of fuel, spark plugs, and engine speed. | 11th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan155 | |
| Carburetter air temperature tests, detonation issues, and the planned improvement of a new cylinder head for the Phantom engine. | 12th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan156 | |
| The effects of hydraulic shock dampers on riding comfort and steering. | 12th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan157 | |
| Page 2 of a document discussing Continental road and speed conditions. | 13th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan158 | |
| The friction and contributing factors in the Phantom automatic ignition advance magneto. | 13th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan159 | |
| Continued memorandum discussing noise issues related to a magneto's sleeve and control linkages. | 13th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan160 | |
| The testing and development of a Lucas magneto, noting performance, noise levels, and proposed modifications. | 13th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan161 | |
| Machine modifications and the status of Lucas magnetos for chassis tests. | 3rd Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan162 | |
| Visit to Messrs. Dunlop to discuss well base tyres, focusing on noise and tread patterns. | 15th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan163 | |
| Comparison of different tyre types, tread wear, comfort, and recommendations for 40/50 HP and 20 HP models. | 15th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan164 | |
| Various tyre types, sizes for 40/50 HP and 20 HP models, and an investigation into high-speed wobble issues. | 16th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan165 | |
| Tests on alternative lubrication oils as a replacement for Prices oil. | 16th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan166 | |
| Quality and availability of various oil brands like Wakefields and Prices. | 22th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan167 | |
| Report from the London Midland & Scottish Railway Co. detailing the examination of two oil samples. | 22th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan168 | |
| Comparison of two oil samples ('A' and 'B') based on heat, viscosity, and asphaltic content tests. | 22th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan169 | |
| Letter from C.C. Wakefield & CO LTD disagreeing with a report on Motorine 'C' and Castrol 'XL' oil analysis. | 10th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan170 | |
| Laboratory report criticizing and comparing two types of oil, A and B, based on their properties. | 15th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan171 | |
| New parts fitted to a 20 HP chassis for a 10,000-mile test. | 17th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan172 | |
| List of evaluations and issues for various vehicle components, including the subframe, springs, and carburetter. | 17th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan173 | |
| List of vehicle features and a concluding summary of a car's performance. | 18th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan174 | |
| Request for a scheme to stiffen the frame on a Phantom car being rebuilt after a fracture. | 18th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan175 | |
| The improvement to the 20 HP carburetter. | 3rd Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan176 | |
| Test report comparing a new light aluminium air valve against the standard brass valve for a 20 HP carburettor. | 17th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan177 | |
| Metering curve graph and analysis for a 20 HP carburetter. | 17th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan178 | |
| Method for developing an adjustable carburetter by measuring air valve lift and depressions to determine the required port area for dilution. | 17th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan179 | |
| Report page detailing the development and road testing of a carburettor, including an upcoming 10,000-mile test in France. | 17th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan180 | |
| Carburettor jet metering with a blueprint of an adjustable carburetter and high-speed choke. | 19th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan181 | |
| Complaints of the Phantom carburetter float chamber cover coming loose and recommending a locking device. | 19th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan182 | |
| Customer complaints and investigations into low-speed wobbles on the 20 HP car. | 19th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan183 | |
| Customer complaint about low speed wobbles on a 20 HP car and a proposed solution. | 22th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan184 | |
| Complaints about the springing on the Phantom model. | 22th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan185 | |
| Tests investigating a riding complaint using various tyre types and pressures on Phantom and Silver Ghost cars. | 24th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan186 | |
| Comparing the performance of up-to-date standard Exide 6RR5 and P & R RR.11 batteries for the 40/50 chassis. | 24th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan187 | |
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