| Description | Date | Identifier | |
| Comparison of power output and detonation for 116° and 110° camshafts on the 'China' engine. | 1st Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan109 | |
| Camshaft performance comparison, compression ratios, engine detonation, and testing of a large bore turbulent head 'China' engine. | 5th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan110 | |
| Graph comparing the open exhaust power curves of a 116° camshaft versus a standard 110° camshaft for a 'China' engine. | 4th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan111 | |
| Stamped document from the Print Room in Derby. | 5th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan112 | |
| Analysis of pedal travel and brake performance issues for the Phantom II S.S. brakes. | 6th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan113 | |
| Brake pedal travel issues and recommending a modification to the direct braking linkage. | 11th Jun 1929 | West Wittering \ T \ 2July1929-December1929 Scan114 | |
| Brake adjustments, wear on brake shoes and linings, and changes to lining materials. | 6th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan115 | |
| Analysis of brake shoe wear, toggle adjustments, and a comparison of brake lining areas between the 20 HP, 40/50 HP, and Phantom models. | 6th Nov 1923 | West Wittering \ T \ 2July1929-December1929 Scan116 | |
| Specifications for future car brake systems, focusing on brake area and liner thickness. | 6th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan117 | |
| The power output of an expanding carburetter tested on a Phantom II engine. | 5th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan118 | |
| Progress report on solving a metering problem by testing combinations of needle taper, diffuser, and air piston spring. | 5th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan119 | |
| Graph comparing the power output of an expanding choke carburettor versus a standard Phantom carburettor on a Phantom III engine with open exhaust. | 4th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan120 | |
| Blank document page with a 'Print Room' stamp. | 5th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan121 | |
| Difficulties with the starter protection arrangement for the Phantom II production model. | 1st Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan122 | |
| Continued discussion on an alternative arrangement for an ignition switch and green lamp earthing. | 6th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan123 | |
| Wiring diagram comparing two different ignition and starter actuation circuits. | 13th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan124 | |
| Analysis of decreasing petrol flow rates to the carburettor caused by various system obstructions. | 13th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan125 | |
| Analysis of fuel delivery rates and flow obstructions related to banjo unions and needle valves. | 7th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan126 | |
| Data table comparing delivery values through a needle valve under different configurations. | 1st Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan127 | |
| Needle valve and fuel flow tests with recommendations for improvement. | 1st Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan128 | |
| Table comparing flow rates in pints per hour for standard and modified filters under two different conditions. | 7th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan129 | |
| Blueprint detailing a nipple used for petrol flow tests. | 6th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan130 | |
| Blueprint with dimensions of a 'larger' banjo used on petrol flow tests, supplied with Zenith petrol filters. | 7th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan131 | |
| Blueprint drawing of a modification to part E76531 for petrol flow tests. | 7th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan132 | |
| Blueprint diagram showing various points for measuring S.S. petrol flow tests on a valve and banjo union. | 7th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan133 | |
| Different lubrication schemes for the Phantom I cantilever spring and trials with American shock absorbers. | 1st Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan134 | |
| Spring lubrication, American type dampers, and specifications for shock absorber loading. | 1st Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan135 | |
| Diagram illustrating modifications to a cantilever spring for the purpose of lubricating the ends of its leaves. | 12th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan136 | |
| Detailed diagram of a centrally lubricated cantilever spring assembly. | 17th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan137 | |
| Comparison of a 116° camshaft against a standard 110° camshaft on a standard China engine, detailing performance differences. | 12th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan138 | |
| The preference for a standard camshaft over a 116° camshaft under certain conditions. | 2nd Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan139 | |
| Performance comparison graph and valve timing data for two different camshafts on a 'China' engine. | 12th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan140 | |
| Stamped document cover page with two punch holes on the right. | 12th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan141 | |
| The road test of a cast aluminium silencer and front expansion chamber on car 20-EX. | 12th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan142 | |
| Modifying an exhaust system to reduce spitting and booming noises. | 12th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan143 | |
| Brake leverage recommendations, testing, and the effects of wear. | 2nd Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan144 | |
| Production of a reduced direct braking system and the testing of brake shoe clearance. | 12th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan145 | |
| The lubrication issues of the Phantom II S.S. clutch, detailing modifications and test results. | 13th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan146 | |
| Clutch and ball bearing tests concerning oiling issues and proposed modifications. | 13th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan147 | |
| Continued document discussing lubrication scheme modifications and production changes for a coupling shaft. | 13th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan148 | |
| Cross-section blueprint of a mechanical component with a handwritten production modification. | 8th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan149 | |
| Blank page with a Print Room date stamp. | 13th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan150 | |
| Bench endurance test report on S.S. sequence starter units, comparing a new 'Y' type spring with the standard 'Z' spring. | 3rd Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan151 | |
| Endurance test report on electrical starter units, detailing a 40,000 cycle push-button test. | 13th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan152 | |
| Continuation page of a report on starter systems, with plans for further observation on experimental cars. | 3rd Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan153 | |
| The condition of an S.S. starter motor after 8,600 miles of use on an experimental chassis. | 13th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan154 | |
| Test report on the performance of new Invar pistons for the Phantom II engine. | 13th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan155 | |
| Comparing a standard Phantom II crankshaft with a new, stiffer version (E.79351) with large pins, analysing changes in torsional period, inertia, weight, and high-speed vibrations. | 14th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan156 | |
| The test results of a nitro alloy water pump spindle. | 5th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan157 | |
| Noise issue with the exhaust heated hot spot on the Phantom II model. | 16th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan158 | |
| Visit to the Dunlop Rubber Company regarding tyre design, focusing on the 'Silent Tread' tyre's safety and adhesion. | 6th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan159 | |
| Tyre performance, tread patterns, and non-skidding qualities for various car models. | 16th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan160 | |
| Continuation page discussing Dunlop list availability for 20 HP standard sizes. | 16th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan161 | |
| Customer suggestion to connect the red warning lamp to the starter carburettor for Phantom cars. | 18th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan162 | |
| Design and experimentation of an oil pressure-operated switch for starter protection. | 19th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan163 | |
| Modifications to a starter motor actuating circuit and ignition fuse tapping point. | 9th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan164 | |
| Typed memo discussing a suggestion for a switch connected to a gear lever. | 19th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan165 | |
| Phantom II brakes, explaining why certain levers cannot be shortened or lengthened and questioning an objection to 35° cams. | 23th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan166 | |
| The testing and performance of chassis ammeters from the Park Royal Co. | 27th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan167 | |
| Comparing the performance of Ferranti and Park Royal chassis ammeters. | 27th Nov 1939 | West Wittering \ T \ 2July1929-December1929 Scan168 | |
| Insufficiency of the standard dynamo and the development of a higher output version for the 20 HP and Phantom II models. | 28th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan169 | |
| The development and characteristics of intermediate, major, and minor output dynamos. | 28th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan170 | |
| 20 HP case tests for dynamo output and considerations for experimental cars. | 28th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan171 | |
| Design evolution and issues of the Phantom II switchbox and distribution board. | 30th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan172 | |
| Analysis of a switchbox's condition after 27,700 miles and considerations for its future use on an experimental car. | 30th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan173 | |
| Recommendation concerning the fuse and switchbox configuration for the Phantom II standard. | 20th Nov 1929 | West Wittering \ T \ 2July1929-December1929 Scan174 | |
| The performance and testing of a Sleevless Type R.C.2 Magneto for 20 HP cars. | 4th Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan175 | |
| Alternative ignition systems for the 20 HP and Phantom II models, proposing a standby ignition coil. | 4th Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan176 | |
| Continued memorandum on ignition systems, discussing batteries, magnetos, and the benefits of in-house design. | 1st Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan177 | |
| The performance of the dynamo battery system in relation to demand for the Phantom II and 20 HP models. | 14th Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan178 | |
| Dynamo output limitations, heating issues, safety margins, and design improvements. | 14th Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan179 | |
| Quoting Mr. Peat's memo on dynamo requirements for driving conditions in Australia. | 14th Dec 1928 | West Wittering \ T \ 2July1929-December1929 Scan180 | |
| Dynamo cut-in speed and the instability of the dynamo-battery-load system. | 14th Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan181 | |
| Battery charging issues, starter consumption, and potential solutions involving dynamo control. | 4th Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan182 | |
| Description of four different output curves for a 20 HP dynamo, detailing the conditions under which the measurements were taken. | 1st Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan183 | |
| Report analysing the performance curves of a dynamo, particularly its intermediate output, for different vehicle models. | 4th Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan184 | |
| Comparison of representative output curves for different Phantom I and Phantom II armature machines. | 14th Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan185 | |
| Modifying existing machine arrangements, specifically for 20 HP and Phantom II dynamos. | 1st Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan186 | |
| Graph showing output curves for a 20 HP dynamo. | 1st Jul 1928 | West Wittering \ T \ 2July1929-December1929 Scan187 | |
| Blank cover or separator page with a print room stamp. | 19th Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan188 | |
| Graph showing dynamo output curves for a 40/50 HP model. | 14th Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan189 | |
| Blank page with a purple 'Print Room' stamp from Derby. | 19th Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan190 | |
| Advising against the use of Sodium Phosphate in radiators due to it causing water loss. | 2nd Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan191 | |
| Proposing a visit to R.L. with two cars, including 16-EX, for a demonstration and trial by sales officials. | 6th Dec 1932 | West Wittering \ T \ 2July1929-December1929 Scan192 | |
| The comparative testing of various H.T. ignition cables for standardisation on the chassis. | 1st Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan193 | |
| Report page detailing the results of physical and chemical tests on different dielectric cable materials. | 1st Dec 1925 | West Wittering \ T \ 2July1929-December1929 Scan194 | |
| The flammability and voltage breakdown tests of various electrical cable samples. | 6th Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan195 | |
| Test results on the cracking and breakdown of different electrical cable insulations under high voltage and heat. | 6th Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan196 | |
| The mileage and electrical breakdown test results for various cable insulation types. | 1st Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan197 | |
| Report comparing the performance and durability of different electrical cable types including Cloverite, Maconit and Helsby. | 1st Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan198 | |
| Report comparing the quality and performance of different H.T. cables (Maconite, Gloverite, Super Glover) on Phantom I and Phantom II chassis. | 12th Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan199 | |
| Issues with H.T. wires overheating due to proximity to the exhaust and ignition tubes, and a request for experimental samples of alternative cables. | 29th Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan200 | |
| Manufacturing merits of a splined taper versus a Woodruff key and taper for shock absorber shafts. | 7th Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan201 | |
| Ignition wire tubing options for the Phantom II, comparing metal and bakelite tubes. | 12th Sep 1929 | West Wittering \ T \ 2July1929-December1929 Scan202 | |
| Tests and factors for addressing springing complaints on Phantom 1 cars, such as harsh low-speed riding and pitching. | 10th Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan203 | |
| Report discussing ride quality issues, such as pitching, and potential improvements using springs and shock absorbers. | 10th Dec 1924 | West Wittering \ T \ 2July1929-December1929 Scan204 | |
| Suspension improvements including front springs, drilled valves, and issues with light fabric bodies on Phantom models. | 10th Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan205 | |
| Use and history of drilled valves in hydraulic shock dampers. | 10th Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan206 | |
| Use of drilled valves and dampers on Phantom I and II models to improve ride quality and road holding. | 10th Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan207 | |
| Endurance testing of Watford EW6A magnetos with different contact points. | 6th Dec 1929 | West Wittering \ T \ 2July1929-December1929 Scan208 | |
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