| Description | Date | Identifier | |
| Comparative performance graphs of P&RTBD7 and Exide 6XL3-4 batteries, plotting Volts against Amperes. | 23th Jun 1926 | West Wittering \ O \ 2April1926-June1926 Scan248 | |
| Comparison of performance curves (Volts vs. Amperes) for two different standard 40-50 HP batteries. | 26th Jun 1926 | West Wittering \ O \ 2April1926-June1926 Scan249 | |
| Experiments on induction pipe heating for Phantom engines, comparing hot spot and pre-heated air systems. | 26th Jun 1926 | West Wittering \ O \ 2April1926-June1926 Scan251 | |
| Report page detailing tests comparing standard hot spot and preheated intake air systems on engine performance. | 26th Jun 1926 | West Wittering \ O \ 2April1926-June1926 Scan252 | |
| Report page with a graph and analysis of torque variation against intake air temperature with no heat applied to the 'hot spot'. | 26th Jun 1926 | West Wittering \ O \ 2April1926-June1926 Scan253 | |
| Graph and analysis comparing the influence of mixture strength on Mean Effective Pressure for different engine heating methods. | 26th Jun 1926 | West Wittering \ O \ 2April1926-June1926 Scan254 | |
| Analysis of engine performance tests comparing the effects of high intake air temperature on power and economy. | 26th Jun 1926 | West Wittering \ O \ 2April1926-June1926 Scan255 | |
| The effects of a 'hot-spot' heating system on engine performance, economy, and detonation. | 26th Jun 1926 | West Wittering \ O \ 2April1926-June1926 Scan257 | |
| Analysis of the effects of hot air intake on engine performance, power, and detonation. | 28th Jun 1926 | West Wittering \ O \ 2April1926-June1926 Scan258 | |
| Testing self-ignition and backward running in Phantom engines, specifically regarding the danger of firing the carburetter. | 28th Jun 1926 | West Wittering \ O \ 2April1926-June1926 Scan259 | |
| Observations on engine back-fire, carburetter performance, and exhaust valve cooling tests. | 28th Jun 1926 | West Wittering \ O \ 2April1926-June1926 Scan260 | |
| Testing hydraulic shock dampers in France with different oils and adjusting their settings to counter vehicle wobble. | 28th Jun 1926 | West Wittering \ O \ 2April1926-June1926 Scan261 | |
| Observations on the operation of 20 HP and 40/50 HP standard dynamos working without a connected battery. | 8th Jun 1926 | West Wittering \ O \ 2April1926-June1926 Scan262 | |
| Test results of the electrical system's voltage, conductance, and ampere output for 20 HP and 40/50 HP models. | 28th Jun 1926 | West Wittering \ O \ 2April1926-June1926 Scan263 | |
| Continued page of a report discussing risks and performance of an electrical system at higher speeds. | 28th Jun 1926 | West Wittering \ O \ 2April1926-June1926 Scan264 | |
| The examination of a Mechanic's Joint after 1623 miles of testing. | 1st Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan1 | |
| Experimental magnetos for the new Phantom chassis from suppliers Lucas and Simms. | 5th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan2 | |
| Report discussing the construction and performance of Lucas and Simms magnetos. | 5th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan3 | |
| Page discussing machine lightening by replacing bronze castings with aluminium. | 5th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan4 | |
| Preliminary report on the Lucas Type KMAG Magneto No. 1125, detailing its main features and construction. | 14th Dec 1925 | West Wittering \ O \ 2January1926-March1926 Scan5 | |
| Preliminary report on the examination and construction of a Ruths Magnetos Type RH11. | 4th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan6 | |
| Modifying spare wheel carriers to fix a breaking bolt. | 1st Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan7 | |
| Modifications to the battery ignition system. | 8th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan8 | |
| The frame failure of the 8-EX experimental car after 11,500 miles and a list of new parts to be fitted. | 14th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan9 | |
| List of improvements and tasks for a car, including a frame replacement for the 8-EX car. | 12th Feb 1925 | West Wittering \ O \ 2January1926-March1926 Scan10 | |
| New features on a 20 HP car being sent to France for a 10,000-mile test. | 15th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan11 | |
| Technical memorandum discussing the springing, deflection, and stiffness of springs for various car models. | 22th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan12 | |
| Customer complaints regarding the springing and ride comfort of the 40/50 HP model. | 2nd Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan13 | |
| Frame flexibility, passenger discomfort, and the challenges of measuring springing movement. | 1st Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan14 | |
| Page expressing an opinion on car springing, comparing it unfavourably with that of the Lancia Lambda. | 6th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan15 | |
| Comparison of springing, weight, and allowance peculiarities between the 20 HP and 40/50 HP models. | 22th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan16 | |
| Spare wheel weight distribution, spring strengthening for export models, and a table of spare wheel weights. | 10th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan17 | |
| Spring load calculation schedule for a Phantom car for running in France. | 17th Mar 1926 | West Wittering \ O \ 2January1926-March1926 Scan18 | |
| Comparison of rear spring deflection and buffer clearance between the 20 HP and 40/50 HP cars. | 22th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan19 | |
| Specification sheet comparing springing loads and alterations for the New Phantom and 20 HP models. | 25th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan20 | |
| The difficulties of accessing and maintaining the oil relief valve on the Phantom model. | 27th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan21 | |
| Proposal to use stainless steel for valves and seats to prevent oil pressure failure from foreign matter. | 27th Nov 1926 | West Wittering \ O \ 2January1926-March1926 Scan22 | |
| Recurring failures and distortion issues with exhaust pipes on the Phantom model during testing. | 27th Nov 1926 | West Wittering \ O \ 2January1926-March1926 Scan23 | |
| Exhaust box lug failure and the unreliability of sliding joints on exhaust pipes. | 27th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan24 | |
| Blueprint of Phantom exhaust pipes detailing areas of cracking and breakage. | 27th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan25 | |
| The performance of Lucas and Simms magnetos for the New Phantom. | 27th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan26 | |
| Magneto performance, comparing different models and suggesting design improvements. | 27th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan27 | |
| Comparison of Watford, Lucas, and Simms magneto systems regarding performance, noise, weight, and operation. | 27th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan28 | |
| Testing Simms and Lucas magnetos for contact breaker noise. | 27th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan29 | |
| The breaking of the Off-Side (O.S.) chassis frame on an S-EX car. | 27th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan30 | |
| Sketch showing a fracture in an off-side frame member sustained during road tests in France. | 25th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan31 | |
| Cover memo for a report on Sunbeam racing engines and superchargers, noting a former Sunbeam employee is now assisting with aero engine testing. | 28th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan32 | |
| Particulars of the 2-Litre Racing Sunbeam engine and its components. | 28th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan33 | |
| Specification sheet detailing the design of reciprocating parts and valve gear. | 28th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan34 | |
| Page 3 of a report detailing engine specifications for camshafts, ignition, and lubrication systems. | 28th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan35 | |
| Description of the engine's cooling and supercharging systems, including details on pumps, vanes, and relief valves. | 28th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan36 | |
| Report page detailing engine component troubles and testing procedures for blowers. | 28th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan37 | |
| Engine troubles during testing, covering piston failure, valve gear breakages, and spark plug fouling. | 28th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan38 | |
| Analysis of engine performance issues related to poor fuel atomisation and distribution at low speeds without supercharging. | 5th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan39 | |
| Fuel test results for a Two-litre Sunbeam engine, detailing a specific alcohol-benzol-ether mixture and its properties. | 27th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan40 | |
| Performance comparison graph for a 2-litre, 6-cylinder Sunbeam G.P. racer engine, showing B.M.E.P. and Horse-Power curves with and without supercharging. | 27th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan41 | |
| Sketches of a connecting rod bearing and a supercharger system layout. | 28th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan43 | |
| Valve lift diagrams for a three-litre Sunbeam engine. | 28th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan44 | |
| The testing of Elliott ammeters against Weston instruments. | 1st Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan45 | |
| The testing of ammeters from Messrs. Elliott, noting a previous test failure and the decision for further testing. | 1st Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan46 | |
| Test report on the performance and mileage of several Elliott ammeters. | 29th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan47 | |
| First flight report for a Fairey 3D Seaplane with an Eagle-15 engine fitted with a 2-speed gear. | 2nd Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan48 | |
| Difficulties with trapped air when filling piston-type hydraulic shock absorbers with oil. | 2nd Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan49 | |
| Road trial of a Cadillac car to investigate steering wobbles. | 2nd Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan50 | |
| Road trial report for an 8-cylinder Cadillac car, detailing its specifications and performance. | 1st Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan51 | |
| Report page detailing observations on a vehicle's suspension, steering, and handling characteristics. | 1st Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan52 | |
| Car's performance, focusing on balloon tyre wobble, wheel shimmy, and brief evaluations of the engine, clutch, and gearbox. | 1st Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan53 | |
| Vehicle performance test report continuation, detailing brake, suspension, and general performance characteristics. | 2nd Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan54 | |
| 20 HP chassis test, detailing steering and pedal modifications and future plans for testing in France. | 2nd Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan55 | |
| Tests to prevent mud from getting onto front brakes. | 3rd Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan56 | |
| Investigation into mud and water penetration of the Goshawk III front brake mechanism. | 1st Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan57 | |
| Report page analyzing mud ingress into a brake drum system and testing different dust cover designs. | 1st Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan58 | |
| Brake drum cover designs and tests to prevent mud and water ingress, including blueprint diagrams. | 4th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan59 | |
| Modifications to brake dust covers to prevent mud and water penetration, recommending a new design and the use of solid rivets. | 4th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan60 | |
| Diagram showing the particulars of a successful dust cover design with measurements and assembly instructions. | 4th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan61 | |
| The progress of testing tungsten ignition points. | 4th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan62 | |
| 10,000-mile bench test of a distributor with stainless steel sparking points. | 4th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan63 | |
| Comparative cooling efficiency tests of new type louvred bonnets against standard shutters on a Phantom car. | 4th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan64 | |
| Experimental testing of ignition coils with finer primary windings. | 6th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan65 | |
| Preliminary tests of hydraulic shock absorbers, investigating a chattering issue caused by trapped air. | 1st Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan66 | |
| Shock absorber design fault causing air re-entry and system chatter. | 2nd Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan67 | |
| Step iron and front mud-guard stay failures on 20 HP and 40/50 HP models tested in France. | 2nd Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan68 | |
| The condition of an 8-EX Barker Limousine body mounted on a subframe after a 14,000-mile test in France. | 1st Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan69 | |
| Various faults and required modifications on a vehicle, including the battery box, windscreen wiper, and valances. | 1st Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan70 | |
| Visit to Derby and the readiness of cars EAC.7, EAC.8, and a 20 HP model. | 1st Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan71 | |
| Tests of hydraulic shock absorbers to eliminate high-speed steering wobbles. | 9th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan72 | |
| Tests on hydraulic dampers and tyres to eliminate vehicle wobbles. | 1st Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan73 | |
| The causes and testing of high-speed steering wobbles, or 'shimmy'. | 1st Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan74 | |
| Continued memo discussing vehicle 'shimmy' or 'wobble' issues related to tyre alterations. | 11th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan75 | |
| The standardization and inspection of a rigid fixed contact point for a cutout. | 11th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan76 | |
| The failure of rear road springs on the 8-EX car during a mileage test. | 1st Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan77 | |
| The distortion of the Goshawk brakes sheet metal carrier bracket due to grease gun application. | 2nd Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan78 | |
| Proposed alteration to brake shaft bearing cap G.50755 to improve lubrication and prevent seizing. | 8th Jan 1926 | West Wittering \ O \ 2January1926-March1926 Scan79 | |
| Recommendation to adopt a modification for a brake shaft bracket to prevent distortion and assist oil flow. | 12th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan80 | |
| Superheated water hot spot system for a Phantom engine. | 12th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan81 | |
| Explanation of temperature variations in engine induction pipes and the effect on fuel evaporation. | 12th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan82 | |
| Report page discussing tests on engine heating systems, including a data table showing the influence of water velocity on heat transfer. | 12th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan83 | |
| Experiments investigating a proposed superheated system and its effects on engine cooling, specifically the rate of heating from cold. | 12th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan84 | |
| Graph and analysis of a Superheat Hot Spot system's temperature increase over time with varying water flow rates. | 12th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan85 | |
| Report page with a graph comparing the increase of induction pipe temperatures for superheated, standard exhaust heated, and water-heated systems. | 12th Feb 1926 | West Wittering \ O \ 2January1926-March1926 Scan86 | |
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