| Description | Date | Identifier | |
| Technical analysis of shaft vibration and the operation of harmonic balancers. | 15th Dec 1926 | West Wittering \ Q \ December1926-January1927 98 | |
| Letter discussing the effects of a shaft balancer on vibration and frequency. | 15th Dec 1926 | West Wittering \ Q \ December1926-January1927 99 | |
| Letter from General Motors to Rolls-Royce discussing harmonic balancers and torsional vibration in engine design. | 10th Dec 1926 | West Wittering \ Q \ December1926-January1927 100 | |
| Letter from Henry M. Crane discussing engine speed, damping, and London Fog. | 19th Jan 1927 | West Wittering \ Q \ December1926-January1927 101 | |
| The performance of platinum and tungsten battery ignition contact points. | 19th Jan 1927 | West Wittering \ Q \ December1926-January1927 102 | |
| Endurance test involving current reversals and the inspection of points. | 19th Jan 1927 | West Wittering \ Q \ December1926-January1927 103 | |
| Observed functional issue with an automatic electro-magnetic switch for reducing the dynamo charge rate. | 22th Jan 1927 | West Wittering \ Q \ December1926-January1927 104 | |
| Technical discussion on the operation of the dynamo charging system, auto-switch, and headlamp controls. | 28th Jan 1927 | West Wittering \ Q \ December1926-January1927 105 | |
| The electrical arrangement and functionality of an auto-switch shunt coil and charging switch. | 4th Dec 1926 | West Wittering \ Q \ December1926-January1927 106 | |
| Continued page discussing potential modifications to a dynamo cutout system to manage voltage and output. | 24th Jan 1927 | West Wittering \ Q \ December1926-January1927 107 | |
| Increased suction noise and whistling from the Phantom carburetter. | 24th Jan 1927 | West Wittering \ Q \ December1926-January1927 108 | |
| Comparative test report on undershield designs for gearboxes, specifically for the Indian market. | 24th Jan 1927 | West Wittering \ Q \ December1926-January1927 109 | |
| Bench and road tests investigating friction in the steering pivot head. | 1st Jan 1927 | West Wittering \ Q \ December1926-January1927 110 | |
| Technical analysis of friction torque and steering performance with different spring loads and friction plate configurations. | 1st Jan 1927 | West Wittering \ Q \ December1926-January1927 111 | |
| Report page detailing friction test results for various steering axle configurations. | 1st Jan 1927 | West Wittering \ Q \ December1926-January1927 112 | |
| Inconsistent results with a friction device and the potential use of a hydraulic steering damper. | 27th Jan 1927 | West Wittering \ Q \ December1926-January1927 113 | |
| Experiments and tests on battery ignition systems, comparing different components like contact points, coils, and condensers. | 27th Jan 1927 | West Wittering \ Q \ December1926-January1927 114 | |
| Tungsten springs, lever equilibrium, and the potential trial of a running contact breaker. | 27th Jan 1927 | West Wittering \ Q \ December1926-January1927 115 | |
| Technical memo detailing the results of bench and road tests on a hydraulic steering damper. | 27th Jan 1927 | West Wittering \ Q \ December1926-January1927 116 | |
| Report discussing oil viscosity in hydraulic dampers and performance tests conducted on the 7-EX car. | 27th Jan 1927 | West Wittering \ Q \ December1926-January1927 117 | |
| Calculations for load requirements and leak adjustments to counteract steering wobble. | 27th Jan 1927 | West Wittering \ Q \ December1926-January1927 118 | |
| New 20 HP induction system designed to improve strength and reduce weight. | 27th Jan 1927 | West Wittering \ Q \ December1926-January1927 120 | |
| Test bed performance comparison between standard manifolds and manifolds to Lec.2216 on an Engine 11-G-111. | 28th Jan 1927 | West Wittering \ Q \ December1926-January1927 121 | |
| Investigation into the causes and extent of excessive brake pedal travel on the EAC-VII model car. | 28th Jan 1927 | West Wittering \ Q \ December1926-January1927 122 | |
| Lost pedal movement and deflection in rear brake systems, with a data table and linkage diagram. | 28th Jan 1927 | West Wittering \ Q \ December1926-January1927 123 | |
| Test report comparing pedal travel lost in the rear axle linkage of 40/50 and EAC.VII models, including measurements and calculations. | 28th Jan 1927 | West Wittering \ Q \ December1926-January1927 124 | |
| Analysis of an EAC.Vll axle twist under braking torque and lost movement due to system elasticity. | 21th Jan 1927 | West Wittering \ Q \ December1926-January1927 125 | |
| Diagram showing axle torsional movement and its effect on brake pedal travel. | 21th Jan 1927 | West Wittering \ Q \ December1926-January1927 126 | |
| Modifications to a Phantom carburettor to reduce suction noise. | 28th Jan 1927 | West Wittering \ Q \ December1926-January1927 127 | |
| Modifications to the battery ignition system, specifically a disc type H.T. rotor. | 28th Jan 1927 | West Wittering \ Q \ December1926-January1927 128 | |
| Technical memorandum on tests investigating high-speed wobbles using heavy section inner tubes and inertia dampers. | 1st Jan 1927 | West Wittering \ Q \ December1926-January1927 129 | |
| Investigation into a petrol flow deficiency with the new Phantom petrol tank filter and the proposed modification to resolve it. | 31th Jan 1927 | West Wittering \ Q \ December1926-January1927 130 | |
| Test report detailing modifications and performance comparisons of petrol delivery through different filter and tap hole configurations. | 31th Jan 1927 | West Wittering \ Q \ December1926-January1927 131 | |
| Technical note on cork seating and petrol piping sizes, including test results and a cross-section diagram. | 3rd Dec 1926 | West Wittering \ Q \ December1926-January1927 132 | |
| The charging potential difference (P.D.) of a new Peto & Radford battery, comparing it to previous models and Exide batteries. | 1st Feb 1927 | West Wittering \ Q \ February1927-March1927 1 | |
| Continued page of a document detailing charge characteristics, mentioning an attached print. | 10th Feb 1927 | West Wittering \ Q \ February1927-March1927 2 | |
| Graph showing the sustained potential difference of a P&R R.R.11-3 battery charging at various currents. | 9th Feb 1927 | West Wittering \ Q \ February1927-March1927 3 | |
| Heavily faded and mostly illegible typed document with a print room stamp. | 1st Feb 1927 | West Wittering \ Q \ February1927-March1927 4 | |
| Investigation into steering geometry issues, specifically the 'joggles' and 'twitching' in the 20 HP model compared to the 40/50 HP. | 1st Feb 1927 | West Wittering \ Q \ February1927-March1927 5 | |
| Technical analysis of steering wheel movement and joggle, with suggestions for improving steering geometry. | 5th Apr 1923 | West Wittering \ Q \ February1927-March1927 6 | |
| Graph and table comparing practical and theoretical results of steering wheel movement induced by front axle movement. | 1st Mar 1927 | West Wittering \ Q \ February1927-March1927 7 | |
| Sending a Phantom sequence starter switch unit from an experimental car for inspection and clarification. | 2nd Feb 1927 | West Wittering \ Q \ February1927-March1927 8 | |
| Internal memorandum discussing the design and selection of components for the No. 2 sequence starter scheme. | 1st Feb 1927 | West Wittering \ Q \ February1927-March1927 9 | |
| Technical note detailing the elimination of faults in a pinion operated switch by applying a new scheme. | 3rd Feb 1927 | West Wittering \ Q \ February1927-March1927 10 | |
| Initiating tests into steering friction, prompted by quality variations and deterioration. | 2nd Feb 1927 | West Wittering \ Q \ February1927-March1927 11 | |
| Test results concerning friction in the steering mechanism. | 7th Feb 1927 | West Wittering \ Q \ February1927-March1927 12 | |
| Steering tests comparing different experimental cars' immunity to 'joggles'. | 29th Mar 1927 | West Wittering \ Q \ February1927-March1927 13 | |
| Testing and modifying a steering column with spring-loaded friction to improve feel and reduce shock. | 31th Mar 1927 | West Wittering \ Q \ February1927-March1927 14 | |
| Report page with a graph illustrating experimental loads on a pendulum lever, discussing steering issues in 20 HP and 40/50 HP cars. | 31th Mar 1927 | West Wittering \ Q \ February1927-March1927 15 | |
| The advantages and disadvantages of friction in the steering column over standard friction systems. | 31th Mar 1927 | West Wittering \ Q \ February1927-March1927 16 | |
| Issues with high-speed wobbles and self-centering. | 2nd Feb 1927 | West Wittering \ Q \ February1927-March1927 17 | |
| The failure and subsequent design changes of a change speed lever shaft on the 7-EX car. | 2nd Feb 1927 | West Wittering \ Q \ February1927-March1927 18 | |
| Audible knock, wear, and oil retention issues in hydraulic shock dampers, suggesting a re-design. | 10th Feb 1927 | West Wittering \ Q \ February1927-March1927 19 | |
| Engine knock and wear in damper bearings on a 20 HP car by feeding oil under pressure. | 10th Feb 1927 | West Wittering \ Q \ February1927-March1927 20 | |
| Blueprint showing a cross-section of a mechanical component featuring a shaft, bearing, and various grooves. | 11th Feb 1927 | West Wittering \ Q \ February1927-March1927 21 | |
| Heavily faded typed document, stamped as received by the Print Room in Derby. | 11th Feb 1927 | West Wittering \ Q \ February1927-March1927 22 | |
| Cross-sectional area for an automatic switch unit component. | 16th Feb 1927 | West Wittering \ Q \ February1927-March1927 23 | |
| High-speed steering wobble and criss-cross axle movement in the EAC-V11 model. | 16th Feb 1927 | West Wittering \ Q \ February1927-March1927 24 | |
| Table comparing the linear movement of the pendle-lever ball pin and tube inclination for various chassis configurations. | 15th Feb 1927 | West Wittering \ Q \ February1927-March1927 25 | |
| Comparison table of pendulum lever movement and tube inclination measurements for various chassis setups. | 15th Feb 1927 | West Wittering \ Q \ February1927-March1927 26 | |
| Life and performance of magneto and battery ignition contact points. | 16th Feb 1927 | West Wittering \ Q \ February1927-March1927 27 | |
| Results of development work on the Phantom induction pipe, concluding the standard arrangement is superior. | 2nd Feb 1927 | West Wittering \ Q \ February1927-March1927 28 | |
| Performance and failure analysis of a Peto & Radford battery after extensive testing. | 6th Feb 1927 | West Wittering \ Q \ February1927-March1927 29 | |
| Examination report comparing the 7-plate and 9-plate sections of a P & R 3A battery. | 9th Feb 1927 | West Wittering \ Q \ February1927-March1927 30 | |
| Test report on a P & R 3A battery (121). | 2nd Feb 1927 | West Wittering \ Q \ February1927-March1927 31 | |
| Brief life history and test report for a P & R 3A battery. | 10th Feb 1927 | West Wittering \ Q \ February1927-March1927 32 | |
| Experiments with various induction pipe systems on the Phantom engine to improve distribution. | 2nd Feb 1927 | West Wittering \ Q \ February1927-March1927 33 | |
| Tests of different intake systems for cold distribution performance. | 2nd Feb 1927 | West Wittering \ Q \ February1927-March1927 34 | |
| Experiments with different carburettor and manifold setups and their impact on power distribution. | 2nd Feb 1927 | West Wittering \ Q \ February1927-March1927 35 | |
| Engine induction systems, discussing cold starting, detonation, and the effects of temperature. | 2nd Feb 1927 | West Wittering \ Q \ February1927-March1927 36 | |
| Experiments comparing exhaust heated systems with water heated systems to reduce detonation and improve engine economy. | 2nd Feb 1927 | West Wittering \ Q \ February1927-March1927 37 | |
| Blueprint showing a diagram of a slotted pipe assembly. | 17th Feb 1927 | West Wittering \ Q \ February1927-March1927 38 | |
| Stamped document from the Print Room in Derby. | 17th Feb 1927 | West Wittering \ Q \ February1927-March1927 39 | |
| Blueprint illustration of a Double Throttle Carburettor. | 1st Feb 1927 | West Wittering \ Q \ February1927-March1927 40 | |
| Diagram illustrating a double-throttle carburetor assembly. | 1st Feb 1927 | West Wittering \ Q \ February1927-March1927 41 | |
| Blueprint diagram of a standard carburettor, labeled as Figure 4. | 1st Feb 1927 | West Wittering \ Q \ February1927-March1927 42 | |
| Blueprint of a Hispano carburettor intake manifold showing the position of a baffle. | 17th Feb 1927 | West Wittering \ Q \ February1927-March1927 43 | |
| The reverse of a document page with a pink, rectangular date stamp from the print room. | 17th Feb 1927 | West Wittering \ Q \ February1927-March1927 44 | |
| Proposal to prepare a 20 HP car for Le Canadel, listing seventeen new parts to be fitted. | 2nd Feb 1927 | West Wittering \ Q \ February1927-March1927 45 | |
| Continued list of numbered components or modifications, page 2. | 21th Feb 1927 | West Wittering \ Q \ February1927-March1927 46 | |
| Testing and results of friction in the steering column for 40/50 HP and 20 HP cars. | 21th Feb 1927 | West Wittering \ Q \ February1927-March1927 47 | |
| Patent for a crankshaft damper by Dr. F.W. Lanchester, noting its similarity to the company's G.1. engine design. | 22th Feb 1927 | West Wittering \ Q \ February1927-March1927 48 | |
| Ongoing problems with piston knocks, including a type referred to as 'rippling knock', despite design improvements. | 1st Feb 1927 | West Wittering \ Q \ February1927-March1927 49 | |
| Tests and recommendations for modifying pistons with slots to eliminate engine knock. | 23th Feb 1927 | West Wittering \ Q \ February1927-March1927 50 | |
| Blueprint showing a side view and cross-section of a Phantom piston with an additional sawcut. | 23th Feb 1927 | West Wittering \ Q \ February1927-March1927 51 | |
| Heavily faded document, likely the reverse of a page, with faint text bleed-through and a pink date stamp. | 23th Feb 1924 | West Wittering \ Q \ February1927-March1927 52 | |
| Trial and weight comparison of magnesium pistons in a Phantom car. | 25th Feb 1927 | West Wittering \ Q \ February1927-March1927 53 | |
| Investigation into petrol filter performance and the causes of choked jets. | 2nd Feb 1927 | West Wittering \ Q \ February1927-March1927 54 | |
| Analysis of foreign matter ('fluff') causing choked jets, a description of a Zenith filter, and a comparative filter test. | 2nd Feb 1927 | West Wittering \ Q \ February1927-March1927 55 | |
| The performance and testing of Zenith and Auto Klean petrol filters. | 2nd Feb 1927 | West Wittering \ Q \ February1927-March1927 56 | |
| Report comparing the performance and issues of various petrol filters, including chamois leather, Zenith, and Auto-Klean. | 2nd Feb 1927 | West Wittering \ Q \ February1927-March1927 57 | |
| Continuation of a report listing the attached micro-photographs of fluff and filter samples. | 5th Apr 1923 | West Wittering \ Q \ February1927-March1927 58 | |
| Photomicrographs comparing fluff extracted from a choked low speed jet with a standard carburetter petrol filter gauze. | 5th Apr 1923 | West Wittering \ Q \ February1927-March1927 59 | |
| Photomicrograph comparison of foreign matter passed through a standard gauze filter versus a Zenith filter. | 5th Apr 1923 | West Wittering \ Q \ February1927-March1927 60 | |
| Blueprint detailing modifications to a Zenith petrol filter, with plan, cross-section and exploded views. | 25th Feb 1927 | West Wittering \ Q \ February1927-March1927 61 | |
| The performance tests of Exide & P & R batteries for the 40/50 HP chassis. | 2nd Feb 1927 | West Wittering \ Q \ February1927-March1927 62 | |
| Concluding that alternative 12-volt batteries show no better performance than the standard battery. | 16th Feb 1927 | West Wittering \ Q \ February1927-March1927 63 | |
| Test results for an S2 battery (155) removed from chassis 8-EX after 133,777 miles. | 16th Feb 1927 | West Wittering \ Q \ February1927-March1927 64 | |
| Test results for an SX Battery (159) after 8231 miles on the road and subsequent bench tests. | 24th Feb 1927 | West Wittering \ Q \ February1927-March1927 65 | |
| Technical graph plotting test data values, possibly related to battery performance or load testing. | 15th Feb 1927 | West Wittering \ Q \ February1927-March1927 66 | |
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