| Description | Date | Identifier | |
| Resuming an investigation into the springing differences between the 20HP and New Phantom chassis. | 19th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan147 | |
| Revised, stiffer spring for the Eagle 16 hand starter pinion to prevent it from fouling the worm wheel. | 20th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan148 | |
| N. scheme 2166 for fitting hydraulic shock dampers to the rear of the New Phantom chassis. | 20th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan149 | |
| Secret memo discussing the modification of a throttle governor spring, referencing drawing LeC. 2034. | 20th Mar 1925 | West Wittering \ O \ January1926-March1926 Scan150 | |
| Scheme Z162 for hydraulic shock dampers, detailing suggested modifications and experimental plans. | 20th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan151 | |
| Discrepancy in the R.H. lock angle for a 20HP chassis steering system. | 20th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan152 | |
| Phantom springing, weight disposition, and a proposal for a parallel experimental investigation. | 1st Mar 1926 | West Wittering \ O \ January1926-March1926 Scan153 | |
| Weight of the Barker patent cabriolet de ville subframe and issues with floorboard fitting. | 20th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan154 | |
| Solutions for low-speed wobble issues on the 20HP model. | 23th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan155 | |
| Forwarding a double acting autovac for testing on a car. | 23th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan156 | |
| Need for a locking device on a float chamber lid and questioning if a 20HP carburetter lid also requires one. | 23th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan157 | |
| Improvements to the Phantom & Goshawk oil relief valves. | 23th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan158 | |
| Design features and improvements for Phantom oil relief valves. | 24th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan159 | |
| Annotated cross-section and plan view diagrams of a valve assembly. | 24th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan160 | |
| Assessment and recommendation to dismiss a proposed fuel vacuum system scheme named 'Autovac Brennstoff Doppel Sauger'. | 24th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan161 | |
| And sketch proposing a solution for gas and hot air leaks through the floorboards and gate mechanism. | 24th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan162 | |
| Giving approval to proceed with an aluminium induction pipe for the 20HP model. | 24th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan163 | |
| Confidential memo proposing tyre and suspension configurations to improve ride quality and handling. | 24th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan164 | |
| With a diagram detailing a revised scheme for the gearbox change lever shaft to prevent gas leaks through the floorboards. | 25th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan165 | |
| Confirming Mr. Royce's instruction to proceed with work on the 20.HP. induction and exhaust pipes. | 25th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan166 | |
| Outlining a series of experiments to diagnose suspension complaints on the Phantom model. | 26th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan167 | |
| Springing demonstration to diagnose a suspension complaint in the Phantom model. | 26th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan168 | |
| Vehicle ride quality complaints, comparing different tyre pressures and suspension setups. | 11th May 1928 | West Wittering \ O \ January1926-March1926 Scan169 | |
| Suggesting a test to diagnose a vibration complaint in the Phantom suspension. | 27th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan170 | |
| The Phantom Automatic Advance, discussing Watford magnetos, spring friction, and servo motor performance. | 27th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan171 | |
| Non-standard front seats and issues with a non-standard accumulator. | 27th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan172 | |
| Proposal to simplify the striking forks for the new EAC 7 gearbox by using electric welding. | 29th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan173 | |
| The magneto advance mechanism for the Phantom Auto. | 30th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan174 | |
| Potential causes and solutions for exhaust backfiring in a Phantom engine. | 30th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan175 | |
| And comparing different front spring and shock damper schemes, including proposals from Woodhead and the existing Lemoine practice. | 30th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan176 | |
| Visit to Le Canadel for vehicle testing on French roads. | 30th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan177 | |
| Improving engine gas flow by addressing restrictions in valve bends and proposing new cylinders and heads for various engines. | 30th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan178 | |
| Feedback and required alterations for a 20HP car after a 10,000-mile test. | 31th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan179 | |
| Schemes and suggestions for weight reduction on the Lighter Phantom engine and chassis. | 31th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan180 | |
| Misunderstandings regarding speed, engine power, tyres, and suspension improvements for cars. | 31th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan181 | |
| Analysis of vehicle vibration, damping, and handling with suggestions for improving suspension and steering systems. | 31th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan182 | |
| Vehicle suspension design, including tyres, steering, springs, and shock dampers. | 31th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan183 | |
| Scheme 2171, detailing alterations to a rear axle involving scalloping and bolt repositioning. | 31th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan184 | |
| Design of a stiffening bracket for the 40/50 model steering system. | 31th Mar 1926 | West Wittering \ O \ January1926-March1926 Scan185 | |
| The 10,000-mile bench test of a Delco-Remy distributor. | 26th Mar 1926 | West Wittering \ P \ 2July1926-September1926 Scan001 | |
| Observations on the Remy distributor, comparing its oil-clearing design to the standard distributor which suffers from pitting. | 19th May 1926 | West Wittering \ P \ 2July1926-September1926 Scan002 | |
| Observations and tests on a Delco-Remy contact breaker unit and ignition coil. | 21th Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan003 | |
| The magnetic properties of coils and a reference to an attached letter regarding contact points. | 21th Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan004 | |
| Tests and specifications for Phantom side steering tube springs. | 7th Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan005 | |
| Page discussing spring load calculations, featuring a cut-out engineering blueprint of a spring assembly. | 7th Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan006 | |
| Analysis of spring performance and manufacturing tolerances related to the side steering tube. | 7th Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan007 | |
| Continued discussion on side steering tube lubrication, assembly, and spring strengths. | 1st Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan008 | |
| Steam heating for the induction pipe on Phantom engines and a proposal to fit the arrangement to car 7-EX. | 1st Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan009 | |
| Continued experiments with the superheated throttle system for carburetter heating on Phantom engines. | 7th Feb 1926 | West Wittering \ P \ 2July1926-September1926 Scan010 | |
| Analysis of exhaust system configurations for quick warming, including a performance graph. | 7th Feb 1926 | West Wittering \ P \ 2July1926-September1926 Scan011 | |
| Performance graph and analysis comparing the rate of heating of a superheat system versus a standard exhaust system. | 7th Feb 1926 | West Wittering \ P \ 2July1926-September1926 Scan012 | |
| Test report page detailing experiments on a heated system, boiler, and engine cooling system. | 7th Feb 1926 | West Wittering \ P \ 2July1926-September1926 Scan013 | |
| Report page detailing experiments on a superheat system with data on boiler performance and throttle heating. | 5th Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan014 | |
| System capacity, cooling, and circulation issues related to a boiler and exhaust-heated system. | 5th Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan015 | |
| Examination of the change speed mechanism on a 12-EX car, identifying a binding issue due to a distorted tubular support and trapped oil. | 1st Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan016 | |
| Proposing the delivery of car EAC-1 for inspection, detailing its current state and planned modifications. | 13th Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan018 | |
| Nine modifications to the 12-EX car before a 10,000-mile test in France. | 13th Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan019 | |
| Description and analysis of the Auto-Pulse Electro-Magnetic Petrol Pump from the U.S.A. | 13th Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan020 | |
| Laboratory test results for a single petrol delivery unit under various conditions. | 13th Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan021 | |
| Page 3 of a continued document detailing an objection considered during work on a car. | 13th Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan022 | |
| Technical bulletin for the 'Autopulse' electric fuel pump covering its service, capacity, life, efficiency, and operation. | 15th Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan024 | |
| Results of using accelerometers to measure riding comfort and discomfort levels for the Phantom suspension. | 15th Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan026 | |
| Comparing ride comfort using a water test, noting the superiority of the front ride in a 40/50 model. | 15th Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan027 | |
| High-speed tests comparing the riding performance of hydraulic and standard friction dampers on various car models. | 5th Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan028 | |
| Test results for white metal bearings, examining load carrying capacity in relation to speed and bearing length. | 15th Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan030 | |
| Bearing failure pressure specifications and diagrams for two different bearing lengths. | 19th Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan031 | |
| Preliminary test results for a new oil relay, including issues with piston ring friction and initial advance settings. | 19th Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan032 | |
| Test report and analysis of a 6-cylinder Bentley car, focusing on its suspension, power, and performance. | 23th Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan033 | |
| Continued report detailing issues with a vehicle's noise, slow running, clutch, steering, and cooling systems. | 23th Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan034 | |
| Report page detailing vehicle issues including water loss, engine vibration, brakes, and oil consumption, with an owner's comparison to a Bentley. | 23th Jul 1926 | West Wittering \ P \ 2July1926-September1926 Scan035 | |
| Blueprint graph comparing the acceleration performance of various Rolls-Royce and Bentley 6-cylinder cars. | 9th Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan036 | |
| Test report on overheating in the interior of Phantom cars, detailing temperature changes with different silencer lagging configurations. | 9th Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan037 | |
| Recommendations for using sheet asbestos for heat insulation on floorboards and subframe cross members. | 9th Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan038 | |
| Results of torsion tests conducted on front springs. | 10th Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan039 | |
| Diagram showing the contour of a spring under torsion and load. | 10th Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan040 | |
| Comparison between reversed and rebound leaf springs, analysing internal friction, spring life, and riding advantages. | 10th Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan042 | |
| Graph plotting deflection against total load for Lancia reversed leaf springs. | 13th Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan043 | |
| The failure of a Silver Ghost chassis frame on chassis 5-AU and 6-EU. | 13th Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan045 | |
| Report discussing a frame fracture on two 'Silver Ghost' chassis, comparing chassis 6-EU with 5-AU. | 13th Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan046 | |
| Diagram showing two views, a side view and an inverted plan, of a broken vehicle frame. | 13th Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan047 | |
| Experiments to determine the reason for explosions in the silencer on the Phantom model. | 13th Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan048 | |
| Analysis of the cause of continuous explosions in the exhaust when an engine is coasting with the throttle slightly open. | 13th Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan049 | |
| Experimental test results on engine performance with altered exhaust, throttle, and mixture settings. | 13th Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan050 | |
| Analysis of engine explosions in the exhaust manifold under different throttle and carburettor settings. | 13th Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan051 | |
| Analysis of silencer explosions related to throttle operation and fuel system behavior. | 13th Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan052 | |
| Investigation into steering troubles on the 12-EX car. | 13th Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan053 | |
| Testing and production costs of a narrower brush type dynamo. | 13th Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan054 | |
| Investigation into an occasional failure of a sequence starter. | 17th Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan055 | |
| Continued discussion on the design of a starter motor, covering push-button operation, winding specifications, and potential jamming. | 17th Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan056 | |
| Further trials investigating starter motor jam issues by varying voltage and torque. | 17th Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan057 | |
| Altering teeth, helix angles, and teazer current to resolve a jamming issue. | 17th Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan058 | |
| The specifications and steering characteristics of an 8-cylinder Panhard car. | 1st Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan059 | |
| Road test report on steering performance under various conditions, including different tyre pressures and shock absorber settings. | 1st Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan060 | |
| Technical report on a vehicle's suspension, engine, brakes, and general performance, including comparisons to other models. | 1st Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan061 | |
| Continued report on vehicle performance, comparing a sleeve valve engine against a Daimler and a poppet valve Hispano engine. | 1st Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan062 | |
| Comparative tests on three different Goshawk III steering setups. | 1st Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan063 | |
| Steering improvements, comparing different configurations of side steering tubes and buffer springs to reduce low-speed wobble. | 1st Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan064 | |
| Comparison of original and latest type side steering tube buffer springs and their ratings. | 20th Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan065 | |
| Investigation into steering complaints and high-speed wobbles on the EAC-Vlll model. | 20th Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan066 | |
| High-speed wobble testing with different tyre setups and dampers. | 20th Aug 1926 | West Wittering \ P \ 2July1926-September1926 Scan067 | |
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