| Description | Date | Identifier | |
| The performance and design of various dynamos, including Bosch, Liberty aero, and Bijur models. | 22th Jul 1920 | West Wittering \ E \ July1920 Scan28 | |
| Erratic performance and testing of a voltage regulator with various battery conditions. | 22th Jul 1920 | West Wittering \ E \ July1920 Scan29 | |
| Report page discussing defects in a vibrator regulator's operating coil. | 22th Jul 1920 | West Wittering \ E \ July1920 Scan30 | |
| Table of standard volt-ampere characteristics for battery and leads during dynamo tests. | 17th Jun 1920 | West Wittering \ E \ July1920 Scan31 | |
| Request to produce a half-scale arrangement drawing of the 'Eagle' engine for a book by Major Evans. | 23th Jul 1920 | West Wittering \ E \ July1920 Scan32 | |
| Trouble with the earthed wiring connection and a rapidly evaporating battery on the 6.EX car. | 23th Jul 1920 | West Wittering \ E \ July1920 Scan33 | |
| Investigation into silencing noisy Lucas E.575 dynamos. | 27th Aug 1920 | West Wittering \ E \ July1920 Scan34 | |
| The investigation of dynamo noise, output, and control brush movement. | 27th Jun 1920 | West Wittering \ E \ July1920 Scan35 | |
| Issues with the distribution board on a 6.EX car, specifically unsatisfactory fuse grips and accessibility. | 27th Jul 1920 | West Wittering \ E \ July1920 Scan37 | |
| Modifications for the Distribution Board for Earthed Wiring Scheme. | 27th Jul 1920 | West Wittering \ E \ July1920 Scan38 | |
| Continued memorandum discussing inspection findings regarding clearances and fitments on a board fitted to a car. | 27th Jul 1920 | West Wittering \ E \ July1920 Scan39 | |
| Improvements to the dynamo belt adjustment for Lucas and Smith dynamos. | 28th Jul 1920 | West Wittering \ E \ July1920 Scan40 | |
| Issues with collapsing copper radiator tubes compared to brass tubes. | 29th Jul 1920 | West Wittering \ E \ July1920 Scan41 | |
| Recommendation to adopt Ferodo bon-rest material for the 40/50 chassis bonnet, replacing the brass wearing strips. | 30th Jul 1920 | West Wittering \ E \ July1920 Scan42 | |
| On thermostat control tests, the function of a bye-pass hole, and preventing radiator freezing in cold climates. | 8th Jun 1920 | West Wittering \ E \ June1920 Scan0 | |
| Page describing the worst condition for radiator freezing. | 1st Jun 1920 | West Wittering \ E \ June1920 Scan1 | |
| Comparative test of engine water heat-up times with various thermostat bye-pass configurations. | 7th Jun 1920 | West Wittering \ E \ June1920 Scan2 | |
| Wiring improvements for the 4.EX car, including a new type of wire and junction box. | 10th Jun 1920 | West Wittering \ E \ June1920 Scan3 | |
| The testing of two different types of rear springs, detailing the failure of one set due to cracked leaves. | 10th Jun 1920 | West Wittering \ E \ June1920 Scan4 | |
| Investigation into improving the output curves of Lucas C.575 and Smith Type 2D dynamos. | 17th Jun 1920 | West Wittering \ E \ June1920 Scan5 | |
| Dynamo specifications, performance, and adjustments for suppliers Lucas and Smith. | 17th Jun 1920 | West Wittering \ E \ June1920 Scan6 | |
| Continued analysis of a machine's output performance and operational characteristics compared to a Lucas model. | 17th Jun 1920 | West Wittering \ E \ June1920 Scan7 | |
| Specification for the electrical operation of a dynamo for a car. | 15th Jun 1920 | West Wittering \ E \ June1920 Scan8 | |
| The comparative test results for Lucas C.575, E.575, A.400 and Smith Type 2D dynamos. | 18th Jun 1920 | West Wittering \ E \ June1920 Scan9 | |
| Continued analysis of performance curves for various 2D machines and dynamos under different conditions and brush settings. | 18th Jun 1920 | West Wittering \ E \ June1920 Scan10 | |
| Performance and heating comparison between Smith type 2D and C.575 Lucas dynamos. | 18th Jun 1920 | West Wittering \ E \ June1920 Scan11 | |
| Report conclusion on heating tests for inherently controlled machines and plans for further investigation into shunt wound machines. | 18th Jun 1920 | West Wittering \ E \ June1920 Scan12 | |
| Chassis dynamo heating test results for various Lucas and Smith dynamo models. | 18th Jun 1920 | West Wittering \ E \ June1920 Scan13 | |
| Table of chassis dynamo heating test results for various models and settings. | 18th Jun 1920 | West Wittering \ E \ June1920 Scan14 | |
| Bump rig testing of a new design for chassis rear springs, noting failures and improved bedding. | 16th Jun 1920 | West Wittering \ E \ June1920 Scan15 | |
| Mr. Royce's criticisms regarding the exhaust cut-out seating scheme. | 4th Jun 1920 | West Wittering \ E \ June1920 Scan16 | |
| Mr. Royce's criticisms and requested modifications for the exhaust pipe nozzle design, scheme 366. | 4th Jun 1920 | West Wittering \ E \ June1920 Scan17 | |
| Mr. Royce's suggestion for a taper reamer design. | 14th Jun 1920 | West Wittering \ E \ June1920 Scan18 | |
| Specifications and advantages for experimental reamers and a left-hand taper tap. | 1st Jun 1920 | West Wittering \ E \ June1920 Scan19 | |
| Stating that Mr. Royce does not agree to alter the position of the priming cock handle on the 40/50 HP chassis. | 7th Jun 1920 | West Wittering \ E \ June1920 Scan20 | |
| Design modifications to the 'Buzzard' engine connecting rods. | 7th Jun 1920 | West Wittering \ E \ June1920 Scan21 | |
| Failure of a recently supplied 1/2 watt lamp from B.T.H. | 9th Jun 1920 | West Wittering \ E \ June1920 Scan22 | |
| The fitting of rear shock dampers, suggesting to focus on perfecting springs instead. | 8th Jun 1920 | West Wittering \ E \ June1920 Scan23 | |
| Letter regarding the use of Castrol lubricating oil for cars, recommending it over pure mineral oil. | 14th Jun 1920 | West Wittering \ E \ June1920 Scan24 | |
| From Mr. Royce detailing requested alterations for the front shock damper anchorage. | 14th Jun 1920 | West Wittering \ E \ June1920 Scan25 | |
| Mr. Royce's design points for the N. Scheme 383 shock damper. | 14th Jun 1920 | West Wittering \ E \ June1920 Scan26 | |
| From 'E' to 'DA' regarding modifications to a lubricator and shock damper based on Mr. Royce's wishes. | 6th Jun 1920 | West Wittering \ E \ June1920 Scan27 | |
| Recommendation by Mr. Royce to protect the speedometer cable casing on chassis 1 EX with an aluminium casting. | 15th Jun 1920 | West Wittering \ E \ June1920 Scan28 | |
| Sample expansion plugs received from Mr. Olley for testing and reporting. | 18th Jun 1920 | West Wittering \ E \ June1920 Scan29 | |
| Future policy on introducing modifications and new designs for chassis 6 EX. | 21th Jun 1920 | West Wittering \ E \ June1920 Scan30 | |
| Two design proposals, types 'A' and 'B', for the 'Eagle' engine's cylinder expansion water jackets. | 19th Jun 1920 | West Wittering \ E \ June1920 Scan31 | |
| Manufacturing process of adding serrations and corrugations to a metal tube. | 19th Jun 1920 | West Wittering \ E \ June1920 Scan32 | |
| Responding to a query on the 'Buzzard' side steering tube, referencing a conversation with Mr. Royce. | 1st Jun 1920 | West Wittering \ E \ June1920 Scan33 | |
| Standardisation and drilling of the 40/50 HP engine foot. | 23th Jun 1920 | West Wittering \ E \ June1920 Scan34 | |
| Modifications to an exhaust cut-out seating design. | 23th Jun 1920 | West Wittering \ E \ June1920 Scan35 | |
| Drawing for 'Buzzard' induction pipes of a 'Y' form. | 21th Jun 1920 | West Wittering \ E \ June1920 Scan36 | |
| Querying the effectiveness, grease loss, and potential design improvements for shock dampers following a road test. | 28th Jun 1920 | West Wittering \ E \ June1920 Scan37 | |
| Design modifications for water pumps on Eagle engines used in airships. | 25th Jun 1920 | West Wittering \ E \ June1920 Scan38 | |
| Design and implications of a combined cut-out and vibrator regulator. | 1st Jun 1920 | West Wittering \ E \ June1920 Scan39 | |
| Design and experimental production of a combined vibrator regulator and cutout. | 25th Jun 1920 | West Wittering \ E \ June1920 Scan40 | |
| Approving a specification for the electrical operation of a dynamo with one exception. | 1st Jun 1920 | West Wittering \ E \ June1920 Scan41 | |
| Design criticisms and requested modifications for the 'Buzzard' and 'Vulture' rear axle. | 2nd Jul 1920 | West Wittering \ E \ June1920 Scan42 | |
| From 'E.' to 'DA.' giving instructions on axle tube modifications and axle ratios, referencing specific engine types and design schemes. | 30th Jun 1920 | West Wittering \ E \ June1920 Scan43 | |
| Alterations to the back axle bevel gear for the 40/50 HP chassis. | 18th Jun 1920 | West Wittering \ E \ June1920 Scan44 | |
| Approval for a design alteration to the operating pin for the clutch oil valve on the 40/50 HP chassis. | 1st Jul 1920 | West Wittering \ E \ June1920 Scan45 | |
| Short memo confirming agreement to proceed with modifications to the cross steering shaft. | 1st Nov 1920 | West Wittering \ E \ November1920 Scan0 | |
| With a sketch proposing a new design for a gauge lamp for the 40/50 HP Chassis, following Mr. Royce's specific requirements. | 11th Nov 1920 | West Wittering \ E \ November1920 Scan1 | |
| Mr. Royce's thoughts on the oil relief system for the 'Vulture' engine. | 1st Nov 1920 | West Wittering \ E \ November1920 Scan2 | |
| Alterations to steering and pedal positions for the 'Goshawk' project, as requested by Mr. Royce. | 8th Nov 1920 | West Wittering \ E \ November1920 Scan3 | |
| Remarks dictated by Mr. Royce on the 'Goshawk' pedal mechanism and brake gear. | 19th Nov 1926 | West Wittering \ E \ November1920 Scan4 | |
| Design alterations for a foot pedal pull rod and brake gear, referencing the 'Goshawk' frame. | 1st Nov 1920 | West Wittering \ E \ November1920 Scan5 | |
| Directions from Mr. Royce regarding the design of the rear spring pivot, shackle, and lubrication for the 'Buzzer' cross members. | 6th Nov 1920 | West Wittering \ E \ November1920 Scan6 | |
| Mr. Royce's feedback on pivots, bracket fittings, and bolts, including a small diagram. | 6th Nov 1920 | West Wittering \ E \ November1920 Scan7 | |
| From E. to D.A. detailing Mr. Royce's suggestions on alternative schemes for bracket tubes and frame connections. | 1st Nov 1920 | West Wittering \ E \ November1920 Scan8 | |
| The proposal to use die-cast whitemetal main bearings for a new chassis. | 19th Nov 1920 | West Wittering \ E \ November1920 Scan9 | |
| Testing of suggestions for bonnet catches. | 19th Nov 1920 | West Wittering \ E \ November1920 Scan10 | |
| Letter from Rolls-Royce of America suggesting a modification for bonnet catches to prevent rattles. | 29th Oct 1920 | West Wittering \ E \ November1920 Scan11 | |
| Redesigning ignition locks and sourcing electrical equipment for a new car model. | 17th Nov 1920 | West Wittering \ E \ November1920 Scan12 | |
| Use of extension test pieces on key automobile components and standardizing testing frequencies. | 22th Nov 1920 | West Wittering \ E \ November1920 Scan13 | |
| Letter from Rolls-Royce of America suggesting the adoption of extension test pieces for three parts. | 2nd Nov 1920 | West Wittering \ E \ November1920 Scan14 | |
| Design changes for the revised 20 HP chassis, focusing on the rear springs and brake gear. | 1st Nov 1920 | West Wittering \ E \ November1920 Scan15 | |
| The rearrangement of the 'Goshawk' engine, referencing blueprint LeC.1314. | 27th Nov 1920 | West Wittering \ E \ November1920 Scan16 | |
| Confirming a blue print of drawing Lec.1312 for the revised 20 HP wheelcase and gears has been sent, noting some parts are yet to be completed. | 27th Nov 1920 | West Wittering \ E \ November1920 Scan17 | |
| Policy document discussing the cost and design considerations for a smaller model car, the 'Goshawk'. | 20th Nov 1920 | West Wittering \ E \ November1920 Scan18 | |
| Business case for producing a smaller car model versus the existing larger car. | 1st Nov 1920 | West Wittering \ E \ November1920 Scan20 | |
| Specification details for a new smaller car chassis, including engine dimensions and other key measurements. | 19th Nov 1920 | West Wittering \ E \ November1920 Scan21 | |
| From R. to CJ. detailing component specifications for a new vehicle, referencing the 'Goshawk' model. | 17th Nov 1920 | West Wittering \ E \ November1920 Scan22 | |
| Modifications for experimental car 4.EX being prepared for shipment and winter testing in the U.S.A. | 4th Nov 1920 | West Wittering \ E \ November1920 Scan24 | |
| Problems with existing exhaust heaters and proposing an alternative design using a screw steam cock. | 4th Nov 1920 | West Wittering \ E \ November1920 Scan26 | |
| Pencil drawing of a mechanical arm or lever with dimensional callouts and a detail view of a tapered and threaded end. | 1st Nov 1920 | West Wittering \ E \ November1920 Scan29 | |
| Modifications proposed by Mr. Royce for the 'Goshawk' starting handle and its associated components. | 9th Dec 1920 | West Wittering \ E \ November1920 Scan30 | |
| Design alterations for a starting shaft, spring housing, and taper plug. | 1st Dec 1920 | West Wittering \ E \ November1920 Scan31 | |
| Design and material options for an inexpensive starting handle and shaft. | 23th Feb 1939 | West Wittering \ E \ November1920 Scan32 | |
| Mr. Royce's requested modifications for the 'Goshawk' starting handle scheme. | 1st Jan 1921 | West Wittering \ E \ November1920 Scan33 | |
| Test results and feedback on the first sample of a lockable ignition switch. | 5th Nov 1920 | West Wittering \ E \ November1920 Scan34 | |
| Results of friction tests on thin-leaf and thick-leaf cantilever springs, both rusty and greased. | 6th Nov 1920 | West Wittering \ E \ November1920 Scan36 | |
| Continued discussion on providing friction in stages using the leaves and a light-duty shock absorber. | 6th Nov 1920 | West Wittering \ E \ November1920 Scan38 | |
| Graph comparing friction in different types of cantilever springs under varying loads. | 5th Nov 1920 | West Wittering \ E \ November1920 Scan39 | |
| Testing Gabriel Snubbers from a 12-cylinder Packard car and sending one to Mr. Royce. | 1st Nov 1920 | West Wittering \ E \ November1920 Scan40 | |
| 'Goshawk' brake gear, accompanying a sketch of a simplified foot-brake adjustment. | 12th Nov 1920 | West Wittering \ E \ November1920 Scan41 | |
| Diagram showing a suggested brake adjustment mechanism for the Goshawk model. | 10th Nov 1930 | West Wittering \ E \ November1920 Scan42 | |
| The Eisemann Type G.N.6 magneto, comparing its weight and design features to other models. | 10th Nov 1920 | West Wittering \ E \ November1920 Scan43 | |
| The features of a machine's distributor, magneto, and earthing brush components. | 10th Nov 1920 | West Wittering \ E \ November1920 Scan44 | |
| Analysis of excitation curves and performance of a Pre-War Bosch Dynamo. | 10th Nov 1920 | West Wittering \ E \ November1920 Scan45 | |
| Analysis of field circuit characteristics including voltage, resistance, and temperature effects on a dynamo or motor. | 10th Nov 1920 | West Wittering \ E \ November1920 Scan46 | |
| | | | |
