| Description | Date | Identifier | |
| Test report on 'SS' Engine No. SS-3, detailing running conditions, induction distribution, and optimal valve timings. | 20th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan073 | |
| Report comparing power curves for 110° and 116° camshafts, with notes on vacuum pump lubrication and tappet adjustments. | 19th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan074 | |
| Power curve graph for a Super Sports Engine comparing different camshafts and nozzle configurations. | 19th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan075 | |
| Heavily faded document with a purple ink Print Room stamp. | 20th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan076 | |
| Standardisation and testing of a Phantom Dynamo 28 Slot Armature. | 20th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan077 | |
| 10,000-mile test of a 28-slot armature, detailing brush wear. | 19th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan078 | |
| Inspection report on the condition of a commutator and its brush surfaces following a test. | 8th Dec 1924 | West Wittering \ S \ September1928-October1928 Scan079 | |
| Safety issues with non-standard front wheel brakes and the unauthorized fitting of 4-wheel brakes by the repair department. | 21th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan080 | |
| Proposed arrangements for electrical wiring, ignition, and charging switches. | 21th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan081 | |
| Functionality and justification of charging switch contacts and ignition systems. | 25th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan082 | |
| Outlining minor criticisms and suggestions for an electrical installation diagram. | 25th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan083 | |
| Continued note on the conventions for representing current direction on wiring diagrams. | 25th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan084 | |
| Visit to Dunlop Rubber Co. discussing issues with standard tyres and the introduction of new 'Fort' and 'Super' models. | 25th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan085 | |
| Technical note detailing Dunlop tyre figures, and observations on rubber engine feet and rubber cylinder joints. | 26th Sep 1933 | West Wittering \ S \ September1928-October1928 Scan086 | |
| Blueprint showing the inflated and deflected shapes of 32x6.00 Dunlop range tyres at standard load and pressure. | 26th Sep 1933 | West Wittering \ S \ September1928-October1928 Scan087 | |
| Observation of the field break spark on charging switch contacts when the dynamo charge is switched off. | 25th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan088 | |
| Wiring connections for low-voltage systems to protect against short circuits. | 25th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan089 | |
| Test report detailing the compression pressures of an 'SS' engine (No. SS-3) across a range of speeds. | 28th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan090 | |
| Engine noise investigations, including piston knock, rocker mechanism, valve mechanism, and timing gear issues. | 25th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan091 | |
| Graph of compression pressures versus RPM for a Super Sports Engine. | 25th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan092 | |
| Blank page with a Print Room, Derby stamp. | 28th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan093 | |
| Graph showing the Mechanical Efficiency and Friction Horsepower of the Super Sports Engine No SS-3 against RPM. | 25th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan094 | |
| Car electrical equipment, specifically fuses, earthing faults, and potential for damage. | 29th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan095 | |
| Dynamo high voltage operation, fuse capacity, and potential overheating issues in fuse holders. | 29th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan096 | |
| Electrical current testing, discussing fusing and oxidising currents in a higher output machine. | 28th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan097 | |
| Road spring friction tests, comparing new vs serviced springs and the effects of polishing, greasing, and cadmium plating. | 28th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan098 | |
| Comparing Firths and Woodhead springs regarding internal friction, digging-in, and other design factors. | 22th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan099 | |
| On spring friction, detailing issues with seizing and poor bedding in rear leaf springs, and proposing solutions to improve ride comfort. | 22th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan100 | |
| Series of three graphs showing deflection vs. applied load tests for a dry rear road spring. | 10th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan101 | |
| Blank page with a 'T Room' date stamp. | 29th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan102 | |
| Graphs showing load-deflection and hysteresis results for three tests on a lubricated rear road spring. | 10th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan103 | |
| Graphs showing results of lubricated standard front road spring tests, plotting deflection against applied load. | 13th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan104 | |
| Series of graphs showing road spring test results for a standard front spring after 3.5 years of service. | 18th Aug 1928 | West Wittering \ S \ September1928-October1928 Scan105 | |
| Graph showing the results of three road spring tests, plotting deflection against applied load. | 18th Aug 1928 | West Wittering \ S \ September1928-October1928 Scan106 | |
| Graph showing deflection, applied load, and hysteresis for three tests on a lubricated, cadmium-plated front road spring. | 14th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan107 | |
| Graphs showing results of three tests on a dry, cadmium-plated front spring after a 4000-mile road test. | 12th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan108 | |
| Stamped document cover or separator page, numbered '1'. | 29th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan109 | |
| Tests comparing the internal friction of front and rear road springs under various conditions. | 29th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan110 | |
| Continued note on the difficulty of road-spring tests due to variations in individual springs. | 25th Aug 1928 | West Wittering \ S \ September1928-October1928 Scan111 | |
| Comparison of Woodheads and Firths 1700 lbs rear road springs, detailing load, camber, and bedding characteristics. | 25th Aug 1928 | West Wittering \ S \ September1928-October1928 Scan112 | |
| Reverse side of a document page with an archival stamp. | 29th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan113 | |
| Drawing comparing the typical bedding and tip sections of a 'Firths Spring' and a 'Woodhead' spring. | 29th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan114 | |
| Blank document with a purple 'Print Room' date stamp. | 29th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan115 | |
| Creation of an ignition timing diagram for the Phantom engine, detailing magneto and battery advance curves. | 12th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan116 | |
| Page 2 of a memo discussing the range of machines and a suggested alteration. | 2nd Oct 1928 | West Wittering \ S \ September1928-October1928 Scan117 | |
| Comparison of present and revised ignition timing settings for the Phantom engine. | 27th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan118 | |
| Blueprint diagram illustrating the ignition timing for an E.A.C.10 engine. | 26th Sep 1928 | West Wittering \ S \ September1928-October1928 Scan119 | |
| On the performance of a lightened clutch and flywheel after 10,000 miles, detailing a rusting issue with the ball race and lubrication problems. | 1st Oct 1928 | West Wittering \ S \ September1928-October1928 Scan120 | |
| Testing and issues with oval-section rubber water joints on development engines. | 1st Oct 1928 | West Wittering \ S \ September1928-October1928 Scan121 | |
| Customer's suggestion for a higher output dynamo with a 'dual debit' system. | 3rd Oct 1928 | West Wittering \ S \ September1928-October1928 Scan122 | |
| Unsatisfactory position of the ignition coil on the Phantom chassis due to overheating. | 1st Oct 1928 | West Wittering \ S \ September1928-October1928 Scan123 | |
| Report page detailing conductance tests performed on insulations at high temperatures. | 1st Oct 1928 | West Wittering \ S \ September1928-October1928 Scan124 | |
| Air intake tests on a 'Hart' aircraft at Martlesham Heath, comparing standard and special intakes. | 1st Oct 1928 | West Wittering \ S \ September1928-October1928 Scan125 | |
| Modifications to engine intakes and flight test results for 'Antelope', 'Fox', and 'Hart' aircraft. | 1st Oct 1928 | West Wittering \ S \ September1928-October1928 Scan126 | |
| Engine flight performance, detailing improvements to prevent cutting out and suggestions for new air intake design. | 1st Oct 1928 | West Wittering \ S \ September1928-October1928 Scan127 | |
| Recommendation to adopt cadmium plating for Phantom chassis parts based on successful 10,000-mile testing. | 1st Oct 1928 | West Wittering \ S \ September1928-October1928 Scan128 | |
| Parts list for the water pump drive complete and governor assembly. | 1st Oct 1928 | West Wittering \ S \ September1928-October1928 Scan129 | |
| Parts list for the Ignition Distributor, Clutch, and Slipper Wheels & Spring Drive. | 1st Oct 1928 | West Wittering \ S \ September1928-October1928 Scan130 | |
| Parts list for a complete servo linkage assembly. | 1st Oct 1928 | West Wittering \ S \ September1928-October1928 Scan131 | |
| Parts list for the servo shaft and associated fittings. | 1st Oct 1928 | West Wittering \ S \ September1928-October1928 Scan132 | |
| List of drawing numbers for front and rear brake components and a note on experimental parts. | 10th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan133 | |
| The unsatisfactory operation of the central lubrication pump for the Phantom Chassis 12-EX. | 10th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan134 | |
| Performance and availability of new silent tread tyres for Phantom and 20 HP cars. | 9th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan135 | |
| Outlining an experimental scheme for an automatic boost pressure regulator on supercharged engines. | 9th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan136 | |
| Issues with Aneroid type boost gauges and a proposed solution using an isolating tap. | 5th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan137 | |
| Sketch showing how an automatic boost regulator provides a self-adjusting throttle stop. | 5th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan138 | |
| Blank document with a purple ink stamp from the Print Room in Derby. | 9th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan139 | |
| Schematic diagram of an automatic boost-pressure regulator system. | 8th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan140 | |
| Almost blank document with a 'Print Room' date stamp. | 9th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan141 | |
| Proposal for an experimental automatic boost pressure regulator for supercharged engines. | 9th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan142 | |
| Continued memorandum detailing tests and solutions for issues with Aneroid type boost gauges on engines. | 5th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan143 | |
| Sketch showing how an automatic boost regulator provides a self-adjusting throttle stop. | 5th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan144 | |
| Blank page marked with a 'Print Room' date stamp. | 10th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan145 | |
| Schematic diagram of an automatic boost-pressure regulator. | 8th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan146 | |
| Blank folded page with a 'Patent Room, Derby' stamp. | 10th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan147 | |
| The performance and required alterations for the Sequence Starter Motor and Gear, No. 2B Scheme. | 10th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan148 | |
| Issues with armature taper, engagement thump, and potential solutions involving stronger springs. | 27th Jul 1928 | West Wittering \ S \ September1928-October1928 Scan149 | |
| Motor performance issues and proposed design changes to the armature and windings. | 27th Jul 1928 | West Wittering \ S \ September1928-October1928 Scan150 | |
| Test experience and issues, such as piston knocks when cold, with SS. Single Bolt Pedestal Pistons. | 12th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan151 | |
| Engine under-lubrication issues, cold starts, and potential piston design improvements. | 12th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan152 | |
| The optimal number of piston rings and a proposal for testing a new piston design. | 13th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan153 | |
| Failures and improvements to the Sequence Starter Motor and Gear, Scheme No. 2B. | 13th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan154 | |
| Gear engagement failures, discussing issues with springs, armatures, and potential modifications. | 13th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan155 | |
| The nitrogenisation of steel process observed at the Hispano Works for crankshafts and cylinder liners. | 13th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan156 | |
| Visit to the Aubert & Duval plant in Paris to observe a nitrogen hardening process for gears and other parts. | 13th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan157 | |
| Visit to the Aubert & Duval plant regarding a metal hardening and nitrogenising process. | 13th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan158 | |
| Summary of a cheap, simple, and distortion-free steel hardening process for use on parts like crankshafts and brake drums. | 16th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan159 | |
| Visit to the Solex Carburetter Co. regarding carburetter 'freezing up' issues and testing methods. | 16th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan160 | |
| Page 2 of a report on engine and carburettor investigations, including single jet carbs, manifold design, and competitor analysis. | 16th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan161 | |
| Continued notes on a car's rear axle and gearbox performance, followed by observations on the suspension of other vehicles. | 16th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan162 | |
| Chassis design, including details on the suspension, steering, engine, and overall construction. | 16th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan163 | |
| Technical evaluation report comparing different car suspension systems and ride quality. | 16th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan164 | |
| Analysis of a car's unconventional suspension, steering, and racing performance. | 16th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan165 | |
| Observations on vehicle design trends, including integrated luggage/spare wheel carriers and types of joints used. | 16th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan166 | |
| Article detailing the operation and design of various automotive gearboxes, transmissions, and clutches with diagrams. | 16th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan167 | |
| Blank document page with a 'Print Room' date stamp. | 16th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan168 | |
| Blueprint diagrams illustrating an independent suspension and chassis system. | 17th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan169 | |
| Heavily faded document page with an official date stamp from the print room. | 17th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan170 | |
| Failure of various washers to eliminate 'end thump' on a starter motor and proposing a new armature design. | 17th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan171 | |
| Running conditions and ongoing tests for Super Sports Engine No. S.S.3. | 18th Oct 1928 | West Wittering \ S \ September1928-October1928 Scan172 | |
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