| Description | Date | Identifier | |
| Calculation table for the ampere-turns required to produce a specific magnetic flux. | 27th Nov 1928 | West Wittering \ T \ November1928 Scan060 | |
| Calculations for motor field winding, including ampere turns, resistance, and cross-sectional area. | 27th Nov 1928 | West Wittering \ T \ November1928 Scan061 | |
| Page discussing motor resistance, supply voltage, torque, and brake test performance. | 1st Nov 1928 | West Wittering \ T \ November1928 Scan062 | |
| Dangerous alteration of the EAC.10 distribution board's main battery fuse from a screw-in to a clip-in type. | 1st Nov 1928 | West Wittering \ T \ November1928 Scan063 | |
| Potential dangers of a proposed change to the main fuse arrangement and recommending the original design be retained. | 1st Dec 1928 | West Wittering \ T \ November1928 Scan064 | |
| Explaining an electrical fault causing the green lamp on the S.S. distribution board to remain on. | 1st Dec 1928 | West Wittering \ T \ November1928 Scan065 | |
| Persistent problems and experiments related to front road spring squeaks and lubrication. | 1st Dec 1928 | West Wittering \ T \ November1928 Scan066 | |
| Diagram illustrating the lubrication method for a flexible cable spring. | 28th Dec 1928 | West Wittering \ T \ November1928 Scan067 | |
| Secret report on the improved riding comfort of the 18-EX 'SS' Phantom after a 450-mile test run. | 28th Dec 1928 | West Wittering \ T \ November1928 Scan068 | |
| Car's performance, noting improvements in power, weight, engine smoothness, and appearance compared to the standard Phantom. | 1st Dec 1928 | West Wittering \ T \ November1928 Scan069 | |
| Test report on the failures observed during an 'SS' Bumper Test on a bumping rig. | 1st Dec 1928 | West Wittering \ T \ November1928 Scan070 | |
| Blueprint of an N.S. Axle Control Damper with handwritten notes detailing repeated component failures. | 5th Dec 1928 | West Wittering \ T \ November1928 Scan071 | |
| Sketch showing the arrangement for fixing the radiator to an S.S. Bump Chassis, noting a stud failure. | 5th Dec 1928 | West Wittering \ T \ November1928 Scan072 | |
| Recurring seizing issues with the dynamo pinion bush lubrication on the 'SS' engine. | 28th Dec 1928 | West Wittering \ T \ November1928 Scan073 | |
| Suggestion to improve lubrication for the pinion bracket by modifying the vacuum pump cylinder's oil port. | 7th Dec 1928 | West Wittering \ T \ November1928 Scan074 | |
| Design changes to an S.S. Sequence Starter's main and auxiliary switch to resolve a motor run-on issue. | 7th Dec 1928 | West Wittering \ T \ November1928 Scan075 | |
| Testing and potential modifications for a Green Lamp Switch, focusing on armature and field contact breaks. | 12th Dec 1928 | West Wittering \ T \ November1928 Scan076 | |
| Continued discussion and recommendation regarding the procedure for breaking an armature in relation to the field. | 12th Dec 1928 | West Wittering \ T \ November1928 Scan077 | |
| Adjustment to the operating and fall-back voltage of a green lamp switch. | 12th Dec 1928 | West Wittering \ T \ November1928 Scan078 | |
| Testing of an S.S. starter and modifications to the 9-EX starter. | 12th Dec 1928 | West Wittering \ T \ November1928 Scan079 | |
| Test report on a new arrangement comprising a lengthened motor, modified pinion teeth, and an interlocked switch. | 12th Dec 1928 | West Wittering \ T \ November1928 Scan080 | |
| Motor and gear performance, detailing issues with engagement, disengagement, noise, and clearances on various systems. | 12th Dec 1928 | West Wittering \ T \ November1928 Scan081 | |
| Analysis of a mechanical disengagement issue, discussing energy absorption, gear noise, and the necessity of a fluid friction damper. | 11th Feb 1928 | West Wittering \ T \ November1928 Scan082 | |
| Further note describing a method for observing the functioning of gears using a hole cut in the gear case. | 11th Feb 1928 | West Wittering \ T \ November1928 Scan083 | |
| Information about a Rotary Displacement Pump from Stothert & Pitt Ltd. | 12th Dec 1928 | West Wittering \ T \ November1928 Scan084 | |
| Decision to revert to a double pole push button switch and the related timing of its circuits. | 14th Dec 1928 | West Wittering \ T \ November1928 Scan085 | |
| Torque and flux curves for a new lengthened armature S.S. motor. | 14th Dec 1928 | West Wittering \ T \ November1928 Scan086 | |
| Report on the testing and potential modification of a sequence starter, with comparisons to a Bosch model. | 15th Dec 1928 | West Wittering \ T \ November1928 Scan087 | |
| The suitability of using a higher-rated spring with a taper armature and the need for fluid damping. | 15th Dec 1928 | West Wittering \ T \ November1928 Scan088 | |
| Follow-up report on experiments and observations regarding corner jamming issues with the S.S. Sequence Starter. | 17th Dec 1928 | West Wittering \ T \ November1928 Scan089 | |
| Forces, friction, and spring requirements of a longer armature motor. | 17th Dec 1928 | West Wittering \ T \ November1928 Scan090 | |
| Analysis of spring forces, armature taper, and electrical engagement in a starting mechanism. | 17th Dec 1928 | West Wittering \ T \ November1928 Scan091 | |
| Analysis of motor engagement failure, discussing spring strength, winding gauge, and current. | 17th Dec 1928 | West Wittering \ T \ November1928 Scan092 | |
| Experiments comparing a Bosch armature with an in-house motor, detailing operational failures and noise issues. | 17th Dec 1928 | West Wittering \ T \ November1928 Scan093 | |
| Continued report on starter motor issues including various noises, motor curves, and a comparison with Bosch starters. | 17th Dec 1928 | West Wittering \ T \ November1928 Scan094 | |
| Analysis of starter motor gear ratios and spring mechanisms, comparing with a Bosch design. | 17th Dec 1928 | West Wittering \ T \ November1928 Scan095 | |
| Secret memo outlining the plan for testing and swapping experimental 'SS' cars in France. | 19th Dec 1928 | West Wittering \ T \ November1928 Scan096 | |
| Reporting the successful completion of 60 hours of bumping tests on the 'SS' chassis with no failures. | 19th Dec 1928 | West Wittering \ T \ November1928 Scan097 | |
| Fault investigation into the reversal of dynamo polarity causing cutout points to stick. | 19th Dec 1928 | West Wittering \ T \ November1928 Scan098 | |
| Continued analysis of a dynamo and switchbox circuit arrangement. | 19th Dec 1928 | West Wittering \ T \ November1928 Scan099 | |
| Troubleshooting of a high voltage fault related to a green lamp circuit and switchbox. | 20th Dec 1923 | West Wittering \ T \ November1928 Scan100 | |
| Secret memo reporting on the mileage testing of the 18-EX experimental car. | 20th Dec 1923 | West Wittering \ T \ November1928 Scan101 | |
| Secret memo reporting on a 2300-mile test of the 'SS' car, discussing starter motor adjustments and a clutch fault investigation. | 21th Dec 1928 | West Wittering \ T \ November1928 Scan102 | |
| Modifications and experimental variations to an S.S. Sequence Starter to improve engagement. | 22th Dec 1928 | West Wittering \ T \ November1928 Scan103 | |
| Modifications and testing of a motor's engagement mechanism, spring rating, and air damper. | 22th Dec 1928 | West Wittering \ T \ November1928 Scan104 | |
| The issues encountered during a 10,000-mile test in France, after the first 5,000 miles. | 27th Dec 1928 | West Wittering \ T \ November1928 Scan105 | |
| The delivery of a 20 HP car (14-G-4) to France, its new engine, and a persistent oscillation problem. | 27th Dec 1928 | West Wittering \ T \ November1928 Scan106 | |
| Recommendation against fitting an experimental green lamp battery indicator to the 'SS' car, advocating for existing standard equipment. | 27th Dec 1928 | West Wittering \ T \ November1928 Scan107 | |
| Recommendation to continue testing an experimental green lamp scheme and use the present Phantom electrical arrangement. | 29th Dec 1928 | West Wittering \ T \ November1928 Scan108 | |
| Design of a fluid damper for the S.S. starter motor armature, referencing an attached sketch of a Bosch grease damper. | 29th Dec 1928 | West Wittering \ T \ November1928 Scan109 | |
| Progress of 10,000-mile car tests in France, including car adjustments and personnel movements. | 29th Dec 1928 | West Wittering \ T \ November1928 Scan110 | |
| Investigation into a green lamp switch that has a mysteriously reduced operating voltage. | 29th Dec 1928 | West Wittering \ T \ November1928 Scan111 | |
| Modifications to the S.S. Sequence Starter, discussing issues with non-taper armatures and performance of chassis 19-EX. | 31th Dec 1928 | West Wittering \ T \ November1928 Scan112 | |
| Longitudinal pull and friction, discussing armature design, magnetic flux, and potential improvements with new brushes and dampers. | 15th Nov 1928 | West Wittering \ T \ November1928 Scan113 | |
| Engine roughness at high speeds in the 20 HP and 40/50 HP models, recommending testing a balanced crankshaft. | 15th Nov 1928 | West Wittering \ T \ November1928 Scan114 | |
| Report suggesting the use of counter weights on car crankshafts to reduce high speed roughness and vibrations. | 13th Nov 1928 | West Wittering \ T \ November1928 Scan115 | |
| The possible causes of high-speed roughness and vibration in cars. | 13th Nov 1928 | West Wittering \ T \ November1928 Scan116 | |
| Engine vibration, resonance, and roughness at different speeds, with references to specific engine models. | 13th Nov 1928 | West Wittering \ T \ November1928 Scan117 | |
| Engine torsional periods and the distortion of moving parts at high speeds. | 13th Nov 1928 | West Wittering \ T \ November1928 Scan118 | |
| Engine vibration, distortion balance, and potential solutions like using counter-weights. | 13th Nov 1928 | West Wittering \ T \ November1928 Scan119 | |
| Crankcase design, materials, and their effects on engine vibration. | 13th Nov 1928 | West Wittering \ T \ November1928 Scan120 | |
| Reducing high-speed engine roughness by comparing added counterweights against a stiffer crankcase. | 13th Nov 1928 | West Wittering \ T \ November1928 Scan121 | |
| Comparison of crankshaft and engine designs, including those of Chrysler, Stutz, and Alfa-Romeo. | 13th Nov 1928 | West Wittering \ T \ November1928 Scan122 | |
| Engine vibration, with a quote on crankcase vibrations, and the arrangement of counterweights on crankshafts. | 13th Nov 1928 | West Wittering \ T \ November1928 Scan123 | |
| Competitor crankshaft balancing methods followed by details of vibration experiments conducted on a 20 HP engine. | 13th Nov 1928 | West Wittering \ T \ November1928 Scan124 | |
| Page 10 of a report analyzing engine vibration characteristics and testing results. | 13th Nov 1928 | West Wittering \ T \ November1928 Scan125 | |
| Analysis of crankshaft vibration and distortion, with a suggested new design for a 20 HP engine. | 13th Nov 1928 | West Wittering \ T \ November1928 Scan126 | |
| Typed memorandum discussing crankshaft design, including pin lengths, disc-web shafts, and comparisons to racing engines. | 28th Sep 1928 | West Wittering \ T \ November1928 Scan127 | |
| Diagram showing the inertia loads on a 20 HP engine crankshaft at 3500 R.P.M. | 28th Sep 1928 | West Wittering \ T \ November1928 Scan128 | |
| Blank page stamped by the Print Room in Derby. | 13th Nov 1928 | West Wittering \ T \ November1928 Scan129 | |
| Diagrams showing types of counterweights employed in some cars. | 6th Nov 1928 | West Wittering \ T \ November1928 Scan130 | |
| Diagrams illustrating crankshaft counterweight arrangements for various engines. | 6th Nov 1928 | West Wittering \ T \ November1928 Scan131 | |
| Blueprint with notes on the design and benefits of a counterweighted crankshaft for a 20 HP engine. | 29th Oct 1928 | West Wittering \ T \ November1928 Scan132 | |
| Proposed modification drawing for the Phantom II Air Silencer. | 2nd Jan 1930 | West Wittering \ U \ 2January1930-September1930 Scan001 | |
| Proposing a change from a single to a double guide for the Phantom radiator shutter thermostat bellows. | 1st Jan 1930 | West Wittering \ U \ 2January1930-September1930 Scan002 | |
| Rear spring clips striking the frame and a proposed modification to increase clearance. | 1st Apr 1930 | West Wittering \ U \ 2January1930-September1930 Scan003 | |
| Lack of lateral adjustment for 20HP rubber-mounted engine feet and proposed solutions. | 4th Jan 1930 | West Wittering \ U \ 2January1930-September1930 Scan004 | |
| Clarifying an error in the proposed letter-based nomenclature for new steering column options on long chassis vehicles. | 6th Jan 1930 | West Wittering \ U \ 2January1930-September1930 Scan005 | |
| Design for conveying pressure oil to the rear axle via a coil spring and shackle pin. | 1st Jul 1930 | West Wittering \ U \ 2January1930-September1930 Scan006 | |
| Requesting a print of drawing LeC. 2780 for an expanding carburetter with a fixed throat for the Phantom II. | 9th Jan 1930 | West Wittering \ U \ 2January1930-September1930 Scan007 | |
| Options for conveying oil to the axles for centralised chassis lubrication. | 10th Jan 1930 | West Wittering \ U \ 2January1930-September1930 Scan008 | |
| Alternative method for spring lubrication via an annulus inside the pins for a centralised chassis lubrication system. | 10th Jan 1930 | West Wittering \ U \ 2January1930-September1930 Scan009 | |
| Specifications for the Experimental Continental Touring Car on a short chassis. | 10th Jan 1930 | West Wittering \ U \ 2January1930-September1930 Scan010 | |
| From 'R.' (Royce) discussing the development of a silent, easy-to-change 4-speed gearbox using a Salerni coupling. | 13th Jan 1930 | West Wittering \ U \ 2January1930-September1930 Scan011 | |
| Summary of a discussion on gearbox performance, gear changing, and silence. | 15th Jan 1930 | West Wittering \ U \ 2January1930-September1930 Scan012 | |
| Gearbox noise and comparisons with Armstrong-Siddeley, Graham-Paige, and Chrysler vehicles. | 20th Jan 1930 | West Wittering \ U \ 2January1930-September1930 Scan013 | |
| Comparing the noise levels of various gearbox designs based on pitch speed and load calculations. | 20th Jan 1930 | West Wittering \ U \ 2January1930-September1930 Scan014 | |
| Proposal regarding the 20HP hypoid rear axle, to enable the pinion to be withdrawn for inspection without disturbing the gear. | 21th Jan 1930 | West Wittering \ U \ 2January1930-September1930 Scan015 | |
| With diagrams detailing modifications to the Phantom II Invar piston for improved flexibility and fit. | 23th Jan 1930 | West Wittering \ U \ 2January1930-September1930 Scan016 | |
| Blueprints and a model of a blower from Powerplus Co. for a compression ignition engine. | 25th Jan 1930 | West Wittering \ U \ 2January1930-September1930 Scan017 | |
| Two proposals for modifying the increased charge switching system and its potential issues. | 25th Jan 1930 | West Wittering \ U \ 2January1930-September1930 Scan018 | |
| Trial of a 20/60 Vauxhall, analyzing modifications made to eliminate radiator wobble and improve engine smoothness. | 27th Jan 1930 | West Wittering \ U \ 2January1930-September1930 Scan019 | |
| Modifications to the Phantom II Air Inlet Silencer to reduce power loss. | 28th Jan 1930 | West Wittering \ U \ 2January1930-September1930 Scan020 | |
| Ongoing experiments and potential solutions for the radiator shimmy problem. | 29th Jan 1930 | West Wittering \ U \ 2January1930-September1930 Scan021 | |
| The necessary modifications to accommodate a spare wheel carrier for 7' section tyres. | 3rd Feb 1930 | West Wittering \ U \ 2January1930-September1930 Scan022 | |
| Proposal to increase the thickness of Ferodo lining on rear brake shoes for the 20 HP 10,000-mile test. | 2nd Feb 1930 | West Wittering \ U \ 2January1930-September1930 Scan023 | |
| Suggesting modifications to the clutch for a 20 HP 10,000-mile test vehicle. | 6th Feb 1930 | West Wittering \ U \ 2January1930-September1930 Scan024 | |
| Design considerations for the revised bonnet and dash on the Phantom II model. | 10th Feb 1930 | West Wittering \ U \ 2January1930-September1930 Scan025 | |
| Modifications to radiators and bonnets, referencing the 'Segrave Experiment'. | 10th Feb 1930 | West Wittering \ U \ 2January1930-September1930 Scan026 | |
| 'The Gearbox Problem', reviewing existing solutions and outlining requirements for a new, improved design. | 10th Feb 1930 | West Wittering \ U \ 2January1930-September1930 Scan027 | |
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