| Description | Date | Identifier | |
| Inquiring about the performance of untested modifications to the lubrication of the SS clutch. | 10th Jan 1930 | Box 20 \ 1 Scan053 | |
| Standardisation of chassis parts, specifically the automatic oiling of the clutch spigot bearing from the gearbox. | 6th Jun 1930 | Box 20 \ 1 Scan054 | |
| Modification to Phantom clutches to prevent oil getting on the clutch fabric. | 1st Sep 1930 | Box 20 \ 1 Scan055 | |
| Standardisation of automatic oiling for the clutch spigot from the gearbox. | 15th Jan 1931 | Box 20 \ 1 Scan056 | |
| Costs and implementation plan for fitting a new part to a chassis. | 12th Feb 1931 | Box 20 \ 1 Scan057 | |
| Potential introduction of a lightened flywheel and the implications of signing its standardisation sheet. | 15th Jun 1931 | Box 20 \ 1 Scan058 | |
| Follow-up memo chasing a reply regarding Standardisation Sheet No. X.872 for a lightened flywheel. | 26th Jun 1931 | Box 20 \ 1 Scan059 | |
| Questioning the purpose of a Standardisation Sheet for a lightened flywheel not being introduced due to cost. | 15th Jun 1931 | Box 20 \ 1 Scan060 | |
| Recommendation to cease using the automatic clutch spigot lubrication system due to oil flooding and clutch slippage issues. | 20th Nov 1931 | Box 20 \ 1 Scan061 | |
| Experiments to regulate automatic clutch spigot lubrication before abandoning the system. | 24th Nov 1931 | Box 20 \ 1 Scan062 | |
| Postponing the automatic clutch spigot lubrication on the 40/50 model due to oil leaks reported by the Test Department. | 3rd Dec 1931 | Box 20 \ 1 Scan063 | |
| 10,000-mile test in France, detailing a knock from the torque reaction damper and clutch oil leakage issues. | 3rd Dec 1931 | Box 20 \ 1 Scan064 | |
| Directive to abandon the automatic clutch spigot lubrication system for 20/25 HP and 40/50 HP models. | 4th Dec 1931 | Box 20 \ 1 Scan065 | |
| Issues with the torque re-action damper and oil on the clutch during a 10,000-mile test in France. | 8th Dec 1931 | Box 20 \ 1 Scan066 | |
| Meeting minutes discussing a customer's steering failure due to neglect and proposed actions. | 7th Nov 1911 | Box 20 \ 2 Scan001 | |
| Request regarding worn ball joints on the steering connecting rod of Colonel Stewart Mackenzie's car, number 958, and the fitting of new leather covers. | 8th Nov 1911 | Box 20 \ 2 Scan002 | |
| Decision not to supply parts free of charge for Colonel Stewart Mackenzie's car. | 9th Nov 1911 | Box 20 \ 2 Scan003 | |
| Meeting minutes discussing a steering gear failure on Mrs. Nicholls' car, the potential for reoccurrence, and the instruction for a new part design. | 16th Nov 1911 | Box 20 \ 2 Scan004 | |
| Committee discussion regarding steering joint safety and potential design improvements. | 2nd Nov 1911 | Box 20 \ 2 Scan005 | |
| Departmental memo discussing a potential car fault that could cause a serious accident, referencing an issue on Mrs. Micholls' car. | 2nd Nov 1911 | Box 20 \ 2 Scan006 | |
| Extract from a memo regarding a steering tube replacement due to a stripped thread caused by a loose lock nut and neglect. | 2nd Nov 1911 | Box 20 \ 2 Scan007 | |
| Extract from a note regarding an accident with a steering pivot, discussed at the 96th Technical Committee meeting. | 21th Dec 1911 | Box 20 \ 2 Scan008 | |
| Instruction seeking an opinion on a new method for locking the steering tube lock nut. | 27th Dec 1911 | Box 20 \ 2 Scan009 | |
| Departmental memo discussing weaknesses in steering gear and proposing a new straining test for all steering parts. | 22th Mar 1912 | Box 20 \ 2 Scan010 | |
| Departmental memo discussing the testing of steering components and proposing a special connecting tube with an overload spring. | 23th Jan 1912 | Box 20 \ 2 Scan011 | |
| Proposing a scheme to test the steering gear on every chassis. | 1st Apr 1912 | Box 20 \ 2 Scan012 | |
| Proposed testing procedures for steering gear components. | 12th Apr 1912 | Box 20 \ 2 Scan013 | |
| Proposal for a simple and inexpensive method for testing the steering gear assembly using levers, ropes, and weights. | 12th Apr 1912 | Box 20 \ 2 Scan014 | |
| By F.H. Royce discussing the testing of forgings and steering gear to develop a lighter, stronger chassis. | 18th Apr 1912 | Box 20 \ 2 Scan015 | |
| Mr Royce's suggestion for a new apparatus to stress-test steering gear levers. | 18th Apr 1912 | Box 20 \ 2 Scan016 | |
| Outlining a scheme for testing complete steering gear. | 18th Apr 1912 | Box 20 \ 2 Scan017 | |
| Procedure for stress testing steering gear using a system of ropes and weights. | 18th Apr 1912 | Box 20 \ 2 Scan018 | |
| To Mr Royce requesting inspection and criticism of a special locking arrangement for steering ball sockets for potential standardization. | 26th Jul 1912 | Box 20 \ 2 Scan019 | |
| Inspection report regarding an accident to chassis 935, focusing on the steering components and springs. | 12th Sep 1912 | Box 20 \ 2 Scan020 | |
| Analysis of vehicle failure, speculating on the cause of a broken spring and axle movement following a potential collision. | 12th Sep 1912 | Box 20 \ 2 Scan021 | |
| Statement on the difficulties of conducting an accident inspection if the vehicle has been dismantled. | 20th Jun 1913 | Box 20 \ 2 Scan022 | |
| Internal query and response regarding steering stiffness on trials cars. | 20th Jun 1913 | Box 20 \ 2 Scan023 | |
| Instructions regarding stiffness of steering and the suitability of certain oils for the pivots. | 21th Jun 1913 | Box 20 \ 2 Scan024 | |
| Instruction sheet regarding an issue with a car's stiffness. | 28th Feb 1913 | Box 20 \ 2 Scan025 | |
| Instructions regarding a complaint of steering becoming stiff after continuous running. | 21th Jun 1913 | Box 20 \ 2 Scan026 | |
| Instructions clarifying the correct lubrication procedure for the pivot bushes, addressing a common misunderstanding. | 11th Nov 1912 | Box 20 \ 2 Scan027 | |
| Instruction note regarding insufficient lubrication of bottom bushes on 'Trials cars' and the need for an experiment to investigate the resulting stiffness. | 11th Nov 1912 | Box 20 \ 2 Scan028 | |
| Stiff steering on trials cars, attributing the issue to improper lubrication of the steering pivots. | 23th Jun 1913 | Box 20 \ 2 Scan029 | |
| Departmental memo addressed to Mr. Mercer, forwarding correspondence from Mr. Northey and requesting an experiment be conducted. | 23th Jun 1913 | Box 20 \ 2 Scan030 | |
| Cover letter regarding a memo on the steering mechanism, requesting experimentation and a report. | 24th Jun 1913 | Box 20 \ 2 Scan031 | |
| Series of reports on steering mechanism stiffness, steering wobbles, and frame tests. | 4th Oct 1913 | Box 20 \ 2 Scan032 | |
| Investigation into steering stiffness on Trials cars after a short run, with opinions from the Repair Department. | 4th Oct 1913 | Box 20 \ 2 Scan033 | |
| Internal report on a steering lubrication issue and a proposed solution using a bronze bush. | 22th Sep 1913 | Box 20 \ 2 Scan034 | |
| Potential improvements to steering components, focusing on lubrication and material changes. | 28th Oct 1913 | Box 20 \ 2 Scan035 | |
| Description of the steering gear, including details on the steering tube, joints, column, and wheel operation. | 24th Nov 1913 | Box 20 \ 2 Scan036 | |
| Proposal to use 3½% Nickel Steel for Steering Tubes on the 2900 and 3000 series. | 3rd Dec 1913 | Box 20 \ 2 Scan037 | |
| The bumping test of a steering gear, discussing a breakage and suggesting further tests. | 11th Jun 1914 | Box 20 \ 2 Scan038 | |
| From F.H.R. requesting Mr. Day to improve a piece on current cars and new chassis. | 11th Jun 1914 | Box 20 \ 2 Scan039 | |
| Complete stripping and examination of severely damaged cars for flaws. | 3rd Jul 1914 | Box 20 \ 2 Scan040 | |
| The examination of the steering gear of chassis 2301 after prolonged use in France. | 10th Jul 1914 | Box 20 \ 2 Scan041 | |
| Slow speed steering wobble for Chassis No. 7-CA and a proposed modification. | 9th Sep 1916 | Box 20 \ 2 Scan042 | |
| Front axle steering wobble and shock damper adjustments for a post-war chassis. | 3rd Oct 1916 | Box 20 \ 2 Scan043 | |
| CJ to PN discussing road-holding and steering issues with a Trials Landaulette. | 22th Jan 1920 | Box 20 \ 2 Scan044 | |
| Road handling issues and proposed modifications for a Trials Landaulette car. | 23th Jan 1920 | Box 20 \ 2 Scan045 | |
| Continued page of a report comparing a vehicle condition to other high-speed cars like Lanchester and Lancia. | 22th Jan 1920 | Box 20 \ 2 Scan046 | |
| Road-holding and steering difficulties with a Trials Landaulette and another car, questioning the fitment of shock absorbers. | 22th Jan 1920 | Box 20 \ 2 Scan047 | |
| Comparative steering tests on a 40/50 chassis and the fitting of new shock absorbers to a customer's car. | 26th Nov 1920 | Box 20 \ 2 Scan048 | |
| Steering difficulties caused by rear spring flexibility and proposing tests. | 26th Jan 1920 | Box 20 \ 2 Scan049 | |
| Proposal to modify steering pivots by fitting fibre washers to add damping friction, accompanied by a diagrammatic sketch of a side steering tube. | 26th Jan 1920 | Box 20 \ 2 Scan050 | |
| Investigation into the cause and remedy for faulty steering on trials car 1-LW. | 26th Jan 1920 | Box 20 \ 2 Scan051 | |
| Unstable steering issues, particularly when driving on tram lines, and proposed solutions. | 27th Jan 1920 | Box 20 \ 2 Scan052 | |
| The steering of cars at high speeds, discussing the effects of rear spring flexibility, shock absorbers, and weight distribution. | 27th Jan 1920 | Box 20 \ 2 Scan053 | |
| Racing car suspension, steering geometry, and methods to prevent wheel wobble. | 27th Jan 1920 | Box 20 \ 2 Scan054 | |
| Proposed modifications to the rear springs and steering system to improve vehicle stability. | 27th Jan 1920 | Box 20 \ 2 Scan055 | |
| Letter to Maddocks regarding the failure of a shock absorber lever cam and requesting details on the matter. | 28th Jan 1920 | Box 20 \ 2 Scan056 | |
| Continued letter discussing the testing of shock absorbers and rear springs, with instructions for fitting new parts. | 31th Jan 1920 | Box 20 \ 2 Scan057 | |
| Bump test rig experiments on rear springs in response to steering complaints. | 31th Jan 1920 | Box 20 \ 2 Scan058 | |
| Suspension spring tests comparing different types and their effect on axle movement and road holding. | 31th Jan 1920 | Box 20 \ 2 Scan059 | |
| Spring bump tests, detailing issues with violent bouncing at high speeds and difficulties with road testing due to weather. | 31th Jan 1920 | Box 20 \ 2 Scan060 | |
| Ongoing tests and comparisons between split and solid springs. | 9th Feb 1920 | Box 20 \ 2 Scan061 | |
| Vehicle road and rig testing focusing on issues with steering, suspension, and lateral flexibility. | 1st Feb 1920 | Box 20 \ 2 Scan062 | |
| Telegram from Mr. Royce regarding a steering complaint caused by rear spring flexibility. | 26th Jan 1920 | Box 20 \ 2 Scan063 | |
| Test report on the negative results of adding friction to the 40/50 chassis steering by replacing ball thrust races with fibre washers. | 16th Feb 1920 | Box 20 \ 2 Scan064 | |
| Steering issues related to frictionless and split springs, and recommending the fitting of rear shock dampers. | 20th Feb 1920 | Box 20 \ 2 Scan065 | |
| Steering performance issues, attributing them to road conditions, tyres, and shock dampers rather than split rear springs. | 20th Feb 1920 | Box 20 \ 2 Scan066 | |
| Car's performance up to 60 mph, noting split springs and missing spring clips after 3,000 miles. | 20th Feb 1920 | Box 20 \ 2 Scan067 | |
| Steering and springing tests for the 40/50 chassis, investigating instability issues related to centre point steering. | 20th Feb 1920 | Box 20 \ 2 Scan068 | |
| Steering performance issues related to different types of tyres, specifically Goodyear and Dunlop. | 20th Feb 1926 | Box 20 \ 2 Scan069 | |
| Steering instability, comparing split vs solid springs and the effects of greasy springs and tyres. | 1st Feb 1920 | Box 20 \ 2 Scan070 | |
| Light Labourdette body, noting its height and the excellent riding and steering it provides. | 20th Feb 1920 | Box 20 \ 2 Scan071 | |
| Experimental work on swaying, unstable steering, and steering wobbles. | 3rd Mar 1920 | Box 20 \ 2 Scan072 | |
| Steering wobble issues caused by Warland demountable rims fitted with Dunlop detachable wire wheels. | 18th Mar 1920 | Box 20 \ 2 Scan073 | |
| Steering experiments and suggested improvements for PN and Mr. Horlick. | 12th Apr 1920 | Box 20 \ 2 Scan074 | |
| List of instructions for adjustments to the front axle, springs, and steering components. | 13th Apr 1920 | Box 20 \ 2 Scan075 | |
| Establishing a standard ¼ inch lean for front steering pivots to achieve the best all-round steering. | 15th Apr 1920 | Box 20 \ 2 Scan076 | |
| Manufacturing standards and specifications for the lean of front steering pivots. | 16th Apr 1920 | Box 20 \ 2 Scan077 | |
| Stating that changes to the lean of front steering pivots must be handled via a Standardisation Sheet or by special instructions from Mr. Royce and Mr. Johnson. | 17th Apr 1920 | Box 20 \ 2 Scan078 | |
| Steering system improvements and proposals for further testing. | 19th Apr 1920 | Box 20 \ 2 Scan079 | |
| Experimental testing of central point steering with vertical pivots. | 19th Apr 1920 | Box 20 \ 2 Scan080 | |
| Steering experiments conducted on car 2.EX with reversed Michelin disc wheels. | 23th Apr 1920 | Box 20 \ 2 Scan081 | |
| Steering system experiments comparing different wheel dishing and pivot pin washer configurations. | 23th Apr 1920 | Box 20 \ 2 Scan082 | |
| Best arrangement for car steering and the effects of pivot pin friction. | 23th Apr 1920 | Box 20 \ 2 Scan083 | |
| Solutions for steering oscillation, focusing on additional friction and centre point steering geometry. | 26th Apr 1920 | Box 20 \ 2 Scan084 | |
| Steering gear improvements, cornering, and modifications for a specific vehicle. | 26th Apr 1920 | Box 20 \ 2 Scan085 | |
| Continued memo page with an instruction regarding Mr. Northey's car and the author's car. | 26th Apr 1920 | Box 20 \ 2 Scan086 | |
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