| Description | Date | Identifier | |
| Letter responding to exceptions taken to previous correspondence regarding experimental work. | 23th Jun 1917 | Box 181 \ M11 img044 | |
| Delay in fitting a contact breaker on 7 CA and its progress towards standardization. | 22th Jun 1917 | Box 181 \ M11 img045 | |
| Apology regarding a misleading title for the Friction Anchorage Experiment X.2968. | 25th Jun 1917 | Box 181 \ M11 img046 | |
| Inquiry into the cause of great wear on the fibre of a contact breaker for car 7 CA. | 1st Jul 1917 | Box 181 \ M11 img047 | |
| Cam finishing, platinum point pressure, and the compression of grey fibre material. | 1st Jun 1917 | Box 181 \ M11 img048 | |
| Test report on the performance of Chassis 7 CA, covering the engine, clutch, fuel consumption, and springing. | 5th Jul 1917 | Box 181 \ M11 img049 | |
| Performance of shock dampers with varying damping effects. | 1st Jul 1917 | Box 181 \ M11 img050 | |
| Fitting of new pistons and rings to Wing-Commander Briggs' car. | 5th Jul 1917 | Box 181 \ M11 img051 | |
| Proposed modifications to Commander Briggs' car, including camshafts, carburetter, springing, and brakes. | 4th Jul 1917 | Box 181 \ M11 img052 | |
| Body defect with insufficient wheel clearance, proposing alterations for testing with Commander Briggs for post-war models. | 4th Jul 1917 | Box 181 \ M11 img053 | |
| Cancellation of experiment X.2369A for a chassis 7 ringed piston without a skirt. | 5th Jul 1917 | Box 181 \ M11 img054 | |
| Experiment to fit a ringed piston with a skirt to a 7CA engine. | 24th Jul 1917 | Box 181 \ M11 img055 | |
| Requesting a report on a chassis piston experiment. | 28th Aug 1917 | Box 181 \ M11 img056 | |
| Stating that 7-ringed pistons with skirt are superseded by 5-ring pistons. | 11th Apr 1918 | Box 181 \ M11 img057 | |
| Requesting a progress report on a chassis piston experiment. | 28th Aug 1917 | Box 181 \ M11 img058 | |
| Modifications, tests, and future improvements for cross steering tubes. | 11th Jul 1917 | Box 181 \ M11 img059 | |
| Experimental cross steering tube designs for post-war vehicle models. | 11th Jul 1917 | Box 181 \ M11 img060 | |
| The design, finishing, and extraction methods for cross steering tube ball joints. | 11th May 1917 | Box 181 \ M11 img061 | |
| Battery ignition for cars and the advantages of abandoning the trembler coil when a self-starter is used. | 11th Jul 1917 | Box 181 \ M11 img062 | |
| On ignition system improvements, including condenser design and a future shift to battery ignition. | 1st Jul 1917 | Box 181 \ M11 img063 | |
| Advantages of a synchronized battery and magneto ignition system over a trembler ignition. | 1st Jul 1917 | Box 181 \ M11 img064 | |
| Proposing an experimental new design for a cross-steering tube ball joint. | 14th Jul 1917 | Box 181 \ M11 img065 | |
| Agreeing to fit an improved steering joint with a taper distance piece for standardisation and repair. | 1st Jul 1917 | Box 181 \ M11 img066 | |
| Technical memorandum regarding the use and placement of condensers with tremblers and ignition coils. | 14th Aug 1917 | Box 181 \ M11 img067 | |
| With an annotated diagram discussing modifications to tremblers to improve the secondary spark. | 14th Aug 1917 | Box 181 \ M11 img068 | |
| With diagrams concerning the design of tremblers and their springs. | 28th Aug 1917 | Box 181 \ M11 img069 | |
| Suitability of separate telescopic tubes for enclosing car engine valves. | 28th Aug 1917 | Box 181 \ M11 img070 | |
| Instructions for converting the battery ignition system on 7-CA to a non-trembler type. | 26th Aug 1917 | Box 181 \ M11 img071 | |
| Design and placement of the starter push button and main switch for the 'After-the-War' chassis. | 13th Sep 1917 | Box 181 \ M11 img072 | |
| Telephoned message confirmation regarding valve caps, component failure, and water pump experiments for the Eagle engine. | 18th Sep 1917 | Box 181 \ M11 img073 | |
| Strategy for the New York Show and the construction of a chassis from existing parts. | 21th Sep 1917 | Box 181 \ M11 img074 | |
| Listing experimental parts returned from St. Margaret's and discussing their use and complications. | 15th Oct 1917 | Box 181 \ M11 img075 | |
| Experimental parts, including coils and a Bosch magneto, returned from St. Margaret's for analysis. | 15th Feb 1915 | Box 181 \ M11 img076 | |
| Engine running backwards due to magneto ignition timing and a request for a solution. | 4th Nov 1917 | Box 181 \ M11 img077 | |
| Engine starting difficulties related to an M.L. Magneto. | 4th Nov 1917 | Box 181 \ M11 img078 | |
| From Mr. Royce requesting a trial for a new float chamber needle design combining spring and weight pressure. | 17th Nov 1917 | Box 181 \ M11 img079 | |
| Request for a slow moving air valve for Chassis No. 7-CA. | 23th Nov 1917 | Box 181 \ M11 img080 | |
| Alteration to the float chamber valve needle design and requesting a test of a new version. | 23th Nov 1917 | Box 181 \ M11 img081 | |
| Diagnosing the cause of needle valve trouble on the 7-CA model. | 26th Nov 1917 | Box 181 \ M11 img082 | |
| Ignition troubles with a Remy magneto on chassis 7-CA, requesting a replacement Watford magneto. | 10th Dec 1917 | Box 181 \ M11 img083 | |
| Technical memorandum discussing unsatisfactory piston performance and knocks in an after-the-war chassis model. | 22th Oct 1918 | Box 181 \ M11 img084 | |
| Fitting Truffault-style shock absorbers to the After-the-war-chassis. | 25th Apr 1917 | Box 181 \ M11 img085 | |
| Telegram confirmation regarding the despatch of a drawing for an experimental piston and rods. | 26th Oct 1918 | Box 181 \ M11 img086 | |
| Design of a chassis piston suitable for die casting. | 26th Oct 1918 | Box 181 \ M11 img087 | |
| Design of experimental pistons and connecting rods. | 26th Oct 1918 | Box 181 \ M11 img088 | |
| Modifications to the aluminium piston design to address piston knock and improve heat transfer. | 31th Oct 1918 | Box 181 \ M11 img089 | |
| Advantages of a new, simpler piston design to reduce engine knock and wear. | 31th Oct 1918 | Box 181 \ M11 img090 | |
| Instructions regarding improvements and hardening specifications for the steering ball end on the 1000 - 40/50 HP chassis. | 25th Nov 1918 | Box 181 \ M11 img091 | |
| Note on testing procedures for a die-cast aluminium piston for a chassis. | 5th Dec 1918 | Box 181 \ M11 img092 | |
| Request for drawings and data relating to cam shapes for chassis 7 CA. | 4th Jan 1919 | Box 181 \ M11 img093 | |
| Use of a shorter pattern connecting rod and the need for vibration testing. | 4th Jan 1919 | Box 181 \ M11 img094 | |
| Analysing cam shapes and valve lift curves for chassis 7 CA. | 7th Jan 1919 | Box 181 \ M11 img095 | |
| With a graph comparing standard valve lift to a 7 CA cam lift, requesting further drawings and data. | 8th Jan 1919 | Box 181 \ M11 img096 | |
| Outlining alterations for the 40/50 HP chassis and the required approval process. | 8th Jan 1919 | Box 181 \ M11 img097 | |
| Alterations and experimental work on the 40-50 HP present type chassis. | 18th Dec 1918 | Box 181 \ M11 img098 | |
| Specification for testing three types of experimental radiators on a bumping rig. | 18th Dec 1918 | Box 181 \ M11 img099 | |
| Drawing of a stitched gaiter or cover for a component. | 18th Dec 1918 | Box 181 \ M11 img100 | |
| Radiator design alternatives, performance issues, and testing requirements. | 18th Dec 1918 | Box 181 \ M11 img101 | |
| Technical memorandum on the design and performance of valves and valve gear. | 18th Dec 1918 | Box 181 \ M11 img102 | |
| Piston design policy, the adoption of aluminium pistons, and proposals for testing new piston types. | 9th Nov 1918 | Box 181 \ M11 img103 | |
| Technical memorandum discussing improvements for battery ignition, connecting rods, and crankshafts. | 12th Dec 1918 | Box 181 \ M11 img104 | |
| Design decisions and proposed modifications for front flywheels, magneto, and air pump. | 18th Dec 1918 | Box 181 \ M11 img105 | |
| Carburetion experiments and modifications for the Northcliffe chassis. | 18th Dec 1918 | Box 181 \ M11 img106 | |
| Standardisation and modification of the clutch, gearbox, and back axle components. | 18th Dec 1918 | Box 181 \ M11 img107 | |
| Wheel types and specifications for shock dampers for the 40/50 HP chassis. | 31th Aug 1918 | Box 181 \ M11 img108 | |
| Design and placement of the electric starter and associated wiring. | 18th Dec 1918 | Box 181 \ M11 img109 | |
| Mr. Royce's suggestions for distributing boards and switch boxes for various electrical circuits. | 18th Dec 1918 | Box 181 \ M11 img110 | |
| Design and construction of a standardized electrical terminal for cars. | 10th Apr 1918 | Box 181 \ M11 img111 | |
| Following a visit by Messrs. Wormald and Hives to West Wittering, detailing discussions on pistons, axles, and gears. | 9th Jan 1919 | Box 181 \ M11 img112 | |
| Panel milling machinery and design alterations for the Condor aero engine. | 9th Jan 1919 | Box 181 \ M11 img113 | |
| Request to test a throttle spring and for a new design to be submitted if the original is insufficient. | 30th Jan 1919 | Box 181 \ M11 img114 | |
| Index from a conference discussing post-war chassis design and experimental work. | 30th Jan 1919 | Box 181 \ M11 img115 | |
| Aero engine flight tests, car construction, radiator design, and battery ignition. | 30th Jan 1919 | Box 181 \ M11 img116 | |
| Ignition, lighting, battery, and chassis fuel feed systems. | 30th Jan 1919 | Box 181 \ M11 img117 | |
| Various design suggestions including a fuel suction mechanism, an anti-theft lock, valve gear covers, and foot warmers. | 30th Jan 1919 | Box 181 \ M11 img118 | |
| Meeting notes on the design of foot warmers, fenders, luggage carriers, starting handles, and valances. | 30th Jan 1919 | Box 181 \ M11 img119 | |
| Bodywork, specifically outside valances for toolboxes and a rack and pinion method for controlling windows. | 8th Jan 1919 | Box 181 \ M11 img120 | |
| Specifications for alterations to the 40/50 HP chassis. | 8th Jan 1919 | Box 181 \ M11 img121 | |
| Alterations to the 40-50 HP present type chassis, including an index of sections. | 18th Dec 1918 | Box 181 \ M11 img122 | |
| The policy of adopting aluminium pistons and a list of various piston designs to be tested. | 18th Dec 1918 | Box 181 \ M11 img123 | |
| Inspection of Dunlop wheels on car 7 CA and discussing alternative wheel options from Michelin and Rudge-Whitworth. | 9th Jan 1919 | Box 181 \ M11 img124 | |
| Difficulty of jacking up the front wheels on chassis 49 GB and the approved alteration. | 9th Jan 1919 | Box 181 \ M11 img125 | |
| Visit to West Wittering, with notes on 40/50 HP pistons, axles, and gear manufacturing. | 8th Jan 1919 | Box 181 \ M11 img126 | |
| Panel milling machinery and proposed modifications to the 'Condor' aero engine. | 9th Nov 1919 | Box 181 \ M11 img127 | |
| Speedometer drive for the 500 'After the War' 40/50 HP chassis. | 11th Jan 1919 | Box 181 \ M11 img128 | |
| Radiator design, comparing the strength and weight of square versus round tubes with different end types. | 17th Jan 1919 | Box 181 \ M11 img129 | |
| Short memo regarding the expectation of receiving a model connecting rod for a car engine. | 17th Jan 1919 | Box 181 \ M11 img130 | |
| Clutch experiments, detailing a proposal for a progressive engagement system using multiple springs. | 23th Jan 1919 | Box 181 \ M11 img131 | |
| Mr. Royce's suggestions for improving clutch take-up by introducing flexibility into the anchorage of the 40/50 chassis. | 26th Mar 1924 | Box 181 \ M11 img132 | |
| Positioning and design specifications for starter batteries, condemning a specific design by Lucas. | 1st Feb 1919 | Box 181 \ M11 img133 | |
| Specifications for trial batteries, including weight, capacity, and materials. | 1st Feb 1919 | Box 181 \ M11 img134 | |
| Specifications for a new experimental production car's ignition system. | 1st Feb 1919 | Box 181 \ M11 img135 | |
| Carburettor performance, ignition system adjustments, and preventing engine backfire. | 1st Feb 1919 | Box 181 \ M11 img136 | |
| Page discussing the distributor make ratio and ignition firing sequence, including a hand-drawn diagram. | 6th Jul 1919 | Box 181 \ M11 img137 | |
| Telegram about the specification for new short connecting rods to be white metalled directly onto steel. | 6th Jul 1919 | Box 181 \ M11 img138 | |
| Testing of a vacuum feed for gasoline and a potentially patentable alternative using a small vacuum pump. | 4th Feb 1919 | Box 181 \ M11 img139 | |
| Material choice between bronze bushes and steel rods for the 40/50 HP chassis connecting rods. | 11th Feb 1919 | Box 181 \ M11 img140 | |
| Analysis into the causes of radiator tubes collapsing, suggesting internal water pressure is to blame and that round brass tubes are superior. | 12th Feb 1919 | Box 181 \ M11 img141 | |
| Reproduction and specifications of the 40/50 HP car ignition system. | 12th Feb 1919 | Box 181 \ M11 img142 | |
| Timer gap specifications, production of 2000 sets, and experimenting on starter/lighting for the 20 HP model. | 25th Feb 1919 | Box 181 \ M11 img143 | |
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