| Description | Date | Identifier | |
| Failures and criticisms of the 20-HP petrol gauge, including an extract from a report. | 10th Aug 1923 | Box 49 \ 3 Scan254 | |
| Customer complaint regarding the petrol filler on a 20 HP chassis and the subsequent modification of the supplied funnel. | 14th Aug 1923 | Box 49 \ 3 Scan255 | |
| Solutions for owners losing petrol tank filler caps. | 27th Sep 1923 | Box 49 \ 3 Scan256 | |
| Design of petrol tank filler caps for the 20 HP and 40/50 models. | 25th Oct 1923 | Box 49 \ 3 Scan257 | |
| Standardisation document regarding the petrol tank filler cap to prevent it from being lost. | 25th Oct 1923 | Box 49 \ 3 Scan258 | |
| Modifying the petrol tank baffle and level indicator for the 20 HP model. | 11th Sep 1924 | Box 49 \ 3 Scan259 | |
| The location of the 20-HP petrol supply tap, concluding it should remain under the bonnet. | 13th Nov 1923 | Box 49 \ 3 Scan260 | |
| Complaint about the angle of the side petrol filler on the 20 HP model, making it difficult to refuel. | 29th Jan 1924 | Box 49 \ 3 Scan261 | |
| Extract from a report detailing a customer's complaint about the filler cap on a 20-HP chassis. | 31th Jan 1924 | Box 49 \ 3 Scan262 | |
| Request to send a petrol tank with a reserve compartment to London for inspection. | 17th Sep 1924 | Box 49 \ 3 Scan263 | |
| Standardisation sheet for a petrol tank with a reserve compartment. | 18th Sep 1924 | Box 49 \ 3 Scan264 | |
| The unsatisfactory design of the 20-HP petrol tank filler, detailing issues with the cap, safety wire, and filler tube. | 26th Sep 1924 | Box 49 \ 3 Scan265 | |
| Design and material issues of a 20 HP petrol tank filler, including the safety wire and filler tube. | 29th Sep 1924 | Box 49 \ 3 Scan266 | |
| Delaying the signing of Standardization Sheet X.4266 pending inspection of a tank with a reserve compartment. | 14th Nov 1924 | Box 49 \ 3 Scan267 | |
| Standardisation sheet noting a delay in the design of the reserve compartment. | 17th Nov 1924 | Box 49 \ 3 Scan268 | |
| Arguing against the need for a filling plug on the autovac tank for the 20 HP model. | 11th Dec 1924 | Box 49 \ 3 Scan269 | |
| Technical memo discussing autovac tank maintenance, draining, and experiences with punctured tanks on 4-wheel brake cars. | 11th Dec 1924 | Box 49 \ 3 Scan270 | |
| Suggestion to add an oil catching cover with a drain pipe to address customer complaints about oil leaks on the front wheels. | 16th May 1912 | Box 49 \ 4 Scan001 | |
| List of front axle and steering components. | 17th Aug 1913 | Box 49 \ 4 Scan002 | |
| Requesting the preparation of a front axle and steering gear for a bumping test. | 17th Feb 1913 | Box 49 \ 4 Scan003 | |
| Final report on Experiment 23, detailing front axle bumping tests. | 11th Mar 1913 | Box 49 \ 4 Scan004 | |
| Stress test of steering and suspension components, including results of the examination. | 11th Mar 1913 | Box 49 \ 4 Scan005 | |
| Test report on a steering arm and pivot detailing damage sustained during a series of controlled bumps. | 12th Dec 1913 | Box 49 \ 4 Scan006 | |
| Results of an Axle Bumping Test, comparing spring and hump periodicity. | 12th Dec 1913 | Box 49 \ 4 Scan007 | |
| Bumping machine test of a front axle, detailing its failure and subsequent design modification. | 15th Dec 1914 | Box 49 \ 4 Scan008 | |
| Progress report on material and component testing, including gears, frames, and axles. | 19th Jan 1914 | Box 49 \ 4 Scan009 | |
| Weekly report discussing double rear brakes and a front axle test. | 19th Jan 1914 | Box 49 \ 4 Scan010 | |
| Bumping test of a front axle, F.3391. | 21th Jan 1914 | Box 49 \ 4 Scan011 | |
| Suggestion to create an analysis table showing the life of various steering and spring parts due to breakages on the bumping rig. | 19th Feb 1914 | Box 49 \ 4 Scan012 | |
| Bumping test of Front Axle F3391 - X.23, detailing fracture points over time. | 20th Feb 1914 | Box 49 \ 4 Scan013 | |
| Bumping test failure of Front Axle F3391 and a list of subsequently improved parts. | 24th Feb 1914 | Box 49 \ 4 Scan014 | |
| Improvements to front axle components following a bumping test failure. | 2nd Mar 1914 | Box 49 \ 4 Scan015 | |
| Agreeing with actions taken regarding front axles, bumping tests, and diagonal stays. | 6th Mar 1914 | Box 49 \ 4 Scan016 | |
| Chasing a tabulated analysis of parts broken during bumping rig experiments. | 27th Mar 1914 | Box 49 \ 4 Scan017 | |
| Log of bumping test results for front axles, detailing their lifespan and failure points. | 29th Apr 1914 | Box 49 \ 4 Scan018 | |
| Test report on the durability and failure analysis of front axles. | 3rd Oct 1916 | Box 49 \ 4 Scan019 | |
| Adjustments for the front and back axles to address steering wobble and improve stability. | 3rd Oct 1916 | Box 49 \ 4 Scan020 | |
| Instructions for changes to the rear springs and front axle on chassis 7-CA. | 26th Oct 1916 | Box 49 \ 4 Scan021 | |
| Instructions to replace engine undershields and a heel plate, and a request to reissue lost drawings. | 26th Oct 1916 | Box 49 \ 4 Scan022 | |
| Steering failure on cars at the Front, concerning loose cross steering tube end socket nuts, and the proposal for a standardized fix. | 1st Oct 1915 | Box 49 \ 4 Scan023 | |
| Page 2 of a report detailing the urgency of fixing a potentially fatal failure on cars being used extensively at the Front. | 1st Oct 1915 | Box 49 \ 4 Scan024 | |
| Replacement parts and policy for a Cross Steering Tube. | 19th Aug 1917 | Box 49 \ 4 Scan025 | |
| Delays in manufacturing improved cross steering tube ends due to material sourcing issues and the seriousness of potential steering failure. | 21th Sep 1917 | Box 49 \ 4 Scan026 | |
| Material shortages for cross steering tubes and end forgings. | 9th Jun 1917 | Box 49 \ 4 Scan027 | |
| Urgent replacement of cross steering tubes due to safety concerns. | 28th Feb 1918 | Box 49 \ 4 Scan028 | |
| Proposed changeover scheme concerning steering ball joints and their wear and tear. | 26th Nov 1918 | Box 49 \ 4 Scan029 | |
| Extract concerning the failure and redesign of a stub axle for the 40/50 HP chassis. | 26th Nov 1918 | Box 49 \ 4 Scan030 | |
| Design modification to strengthen a wheel axle, specifying the finishing and polishing process. | 14th Nov 1918 | Box 49 \ 4 Scan031 | |
| Implementation of a scheme for cross steering tubes. | 14th Nov 1918 | Box 49 \ 4 Scan032 | |
| Extract discussing modifications to the steering gear end joints for the 40/50 HP chassis. | 26th Apr 1917 | Box 49 \ 4 Scan033 | |
| Modification to the stub axle design for the 45/50 HP chassis following a breakdown. | 21th Aug 1918 | Box 49 \ 4 Scan034 | |
| Proposed modification to the steering gear design for a 45/50 HP chassis. | 26th Apr 1917 | Box 49 \ 4 Scan035 | |
| Expressing concerns about the design and testing of frame stiffeners for the RE 500 40/50 chassis. | 18th Jan 1919 | Box 49 \ 4 Scan036 | |
| Pros and cons of fitting frame stiffeners to a chassis. | 18th Jan 1919 | Box 49 \ 4 Scan037 | |
| General arrangement of the front axle, cross steering tube, and non-standard Michelin disc wheels for the 20 HP chassis. | 20th Mar 1919 | Box 49 \ 4 Scan038 | |
| Blueprints for 20 HP chassis front axle parts, particularly a non-standard wheel disc. | 2nd Apr 1919 | Box 49 \ 4 Scan039 | |
| Notification sent to the Order Office confirming receipt of an ammeter, felt washers, and clutch plates for various experiments. | 23th Apr 1919 | Box 49 \ 4 Scan040 | |
| Receipt of various parts from suppliers for experiments. | 21th May 1919 | Box 49 \ 4 Scan041 | |
| Test results for front axle pieces, comparing 'H' section and 'Box' section designs under load. | 21th May 1919 | Box 49 \ 4 Scan042 | |
| Continuation of a test report detailing load, deflection, and weight measurements of H and Box section pieces. | 21th May 1919 | Box 49 \ 4 Scan043 | |
| Practical construction of an experimental square box section front axle. | 28th May 1919 | Box 49 \ 4 Scan044 | |
| Specifying the total degrees of movement for the steering joint from full lock to full lock. | 3rd May 1919 | Box 49 \ 4 Scan045 | |
| Mr. Royce's wish for all swivel pins to be made with a taper for easier disassembly. | 9th Jun 1919 | Box 49 \ 4 Scan046 | |
| Assembly record for Chassis 1. E.X. detailing the main components and parts used. | 30th May 1919 | Box 49 \ 4 Scan047 | |
| Letter regarding ill-fitting cross steering tubes and requesting new parts. | 7th Jul 1919 | Box 49 \ 4 Scan048 | |
| Mr. Royce's instructions on the policy for replacing cross steering tubes to avoid unnecessary company expense. | 23th Jul 1919 | Box 49 \ 4 Scan049 | |
| Receipt of various parts from suppliers for experimental purposes. | 4th Aug 1919 | Box 49 \ 4 Scan050 | |
| The setup and results of a 40/50 chassis bumping test, comparing it to pre-war standards. | 18th Aug 1919 | Box 49 \ 4 Scan051 | |
| Component failures, their running times, and associated remarks. | 1st Jul 1924 | Box 49 \ 4 Scan052 | |
| Confirming receipt of springs and ferrules from two suppliers for experiment 3516. | 27th Aug 1919 | Box 49 \ 4 Scan053 | |
| Extract listing a change to the 40/50 chassis, specifically the removal of aluminium liners from the axle tube. | 27th Aug 1919 | Box 49 \ 4 Scan054 | |
| New and experimental parts fitted to Bumper Chassis X.1131. | 1st Oct 1919 | Box 49 \ 4 Scan055 | |
| Use of 'No-entering Slot' type bearings for the Hoffmann No. 335 size. | 20th Oct 1919 | Box 49 \ 4 Scan056 | |
| List of new parts fitted to a car for a 10,000-mile endurance run, with remarks. | 1st Jan 1920 | Box 49 \ 4 Scan057 | |
| Condition report on an EX chassis, detailing component wear, mileage, and fuel consumption. | 1st Mar 1926 | Box 49 \ 4 Scan058 | |
| Experimental work to resolve issues with unstable swaying and steering wobbles. | 3rd Mar 1920 | Box 49 \ 4 Scan059 | |
| Tests and suggestions for improving unstable steering and springing issues. | 8th Mar 1920 | Box 49 \ 4 Scan060 | |
| Car swaying issues related to spring design and steering components. | 1st Aug 1919 | Box 49 \ 4 Scan061 | |
| Outlining proposed part upgrades and adjustments for the 10,000 miles test car, 2.EX. | 1st Mar 1920 | Box 49 \ 4 Scan062 | |
| Recommending the standardization of a 1/4 inch lean for front steering pivots on all future cars. | 15th Apr 1920 | Box 49 \ 4 Scan063 | |
| Clarifying instructions and specifications for the lean of front steering pivots. | 16th Apr 1920 | Box 49 \ 4 Scan064 | |
| That any alteration to the lean of front steering pivots should be managed via a Standardisation Sheet or by direct instruction from Mr. Royce and Mr. Johnson. | 17th Apr 1920 | Box 49 \ 4 Scan065 | |
| Steering improvements, comparing performance, and suggesting further tests on radius rods and thrust bearings. | 19th Apr 1920 | Box 49 \ 4 Scan066 | |
| Note regarding an experimental test on a central point steering system with vertical pivots. | 19th Apr 1920 | Box 49 \ 4 Scan067 | |
| Steering experiments with Michelin disc wheels, testing the effects of wheel dish orientation on steering stability. | 23th Apr 1920 | Box 49 \ 4 Scan068 | |
| Steering issues, analysing the effects of friction, wheel dish, and pivot pin arrangements on wheel oscillation. | 23th Apr 1920 | Box 49 \ 4 Scan069 | |
| Continued discussion on steering assembly components and the effect of friction on steering wheel oscillation. | 23th Apr 1920 | Box 49 \ 4 Scan070 | |
| Steering test results and advocating for the standardisation of proposed improvements to pivot lean and steering tube ball ends. | 10th May 1920 | Box 49 \ 4 Scan071 | |
| Inspection notes and recommendations from Mr. Royce on 20 HP chassis components. | 18th May 1920 | Box 49 \ 4 Scan072 | |
| History of front axle pivot replacements and requesting clarification on a specific upgrade path. | 10th Jun 1920 | Box 49 \ 4 Scan073 | |
| Vehicle inspection and modification questionnaire with a series of numbered questions. | 10th Jun 1920 | Box 49 \ 4 Scan074 | |
| Blank 'Inspection Report' form (Form 'B') with a questionnaire for assessing a vehicle's condition and history. | 22th Jul 1919 | Box 49 \ 4 Scan075 | |
| Providing an update on the progress of the 'whirlwind' inspection program and replacement of cross steering tubes. | 22th Jul 1919 | Box 49 \ 4 Scan076 | |
| The urgent replacement of a cross steering tube on chassis 789 and a proposed policy review. | 16th Sep 1920 | Box 49 \ 4 Scan077 | |
| The replacement of a faulty cross steering tube on chassis 789. | 25th Sep 1920 | Box 49 \ 4 Scan078 | |
| Friction in steering and the performance of plain thrust washers on experimental cars. | 4th Nov 1920 | Box 49 \ 4 Scan079 | |
| Fitting plain thrust washers and a permanent design modification for pivot pins. | 4th Nov 1920 | Box 49 \ 4 Scan080 | |
| Modifications and preparations for an experimental car destined for the U.S.A. | 4th Nov 1920 | Box 49 \ 4 Scan081 | |
| Extract detailing specifications for the Small R.R.L. Chassis, referencing the Goshawk model and engine materials. | 17th Nov 1920 | Box 49 \ 4 Scan082 | |
| Requesting review for standardisations of three experiments related to steering and axle components. | 18th Nov 1920 | Box 49 \ 4 Scan083 | |
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