| Description | Date | Identifier | |
| Life of springs during bumping tests. | 1st May 1914 | Box 79 \ 3 scan0175 | |
| Test log sheet detailing results of spring testing, including failure times and modes. | 1st May 1914 | Box 79 \ 3 scan0176 | |
| Test results and failure log sheet for front springs, piece number F.812. | 1st May 1914 | Box 79 \ 3 scan0177 | |
| Log sheet detailing the results of tests on front springs, including failure modes and duration. | 15th Jan 1914 | Box 79 \ 3 scan0178 | |
| Test results log for front springs, detailing failure times and types. | 15th Jan 1914 | Box 79 \ 3 scan0179 | |
| Test log documenting the failure points and lifespan of various springs. | 20th Nov 1913 | Box 79 \ 3 scan0180 | |
| Potential reversion to a pre-war type of chassis rear spring and how to approach the supplier, Messrs Woodheads. | 21th Apr 1920 | Box 79 \ 3 scan0181 | |
| Cablegram concerning the specifications and supply of rear and front springs for American models. | 6th Nov 1920 | Box 79 \ 3 scan0182 | |
| Extract approving the suggestion to make the starting handle detachable for 'after the war' 40/50 chassis. | 19th Dec 1919 | Box 80 \ 1 scan0001 | |
| With a sketch illustrating the clearances for the Starting Handle cover and fan pulley belt. | 19th Dec 1919 | Box 80 \ 1 scan0002 | |
| Modification to the 40/50 chassis starting handle support bush to reduce rattling. | 11th May 1922 | Box 80 \ 1 scan0003 | |
| Two alternative designs for a detachable starting handle for the Goshawk engine. | 3rd Sep 1920 | Box 80 \ 1 scan0004 | |
| Modifications to simplify the 'Goshawk' starting handle as requested by Mr. Royce. | 5th Nov 1920 | Box 80 \ 1 scan0005 | |
| Technical note from Mr. Royce regarding the starting shaft spring and engagement mechanism. | 1st Nov 1920 | Box 80 \ 1 scan0006 | |
| Hand-drawn sketch of a firearm component with dimensions and a manufacturing note. | 27th Nov 1920 | Box 80 \ 1 scan0007 | |
| Modifications to the 'Goshawk' starting handle, comparing it to the existing 40/50 model. | 27th Nov 1920 | Box 80 \ 1 scan0008 | |
| Mr. Royce's requested modifications for the Goshawk starting handle design. | 8th Dec 1920 | Box 80 \ 1 scan0009 | |
| Notes detailing modifications to a spring housing, starting shaft, and taper plug, including a sketch. | 17th Dec 1920 | Box 80 \ 1 scan0010 | |
| Modifications to the 'Goshawk' engine starting handle, including changes to its grip, length, and protective collar. | 17th Dec 1920 | Box 80 \ 1 scan0011 | |
| Modifications to the 'Goshawk' starting handle, scheme 633, as requested by Mr. Royce. | 30th Dec 1920 | Box 80 \ 1 scan0012 | |
| Modifications to the 'Goshawk' starting handle based on Mr. Royce's final remarks. | 1st Jan 1922 | Box 80 \ 1 scan0013 | |
| Adaptation of the 'Goshawk I' starting handle for the 'Goshawk II'. | 12th Jan 1922 | Box 80 \ 1 scan0014 | |
| Revised, simpler, and cheaper design for the 'Goshawk II' starting handle. | 7th Mar 1921 | Box 80 \ 1 scan0015 | |
| Drawing of the removable starting handle for the Goshawk II engine. | 1st Jan 1921 | Box 80 \ 1 scan0016 | |
| Design and materials for the Goshawk II starting handle, referencing blueprint 'N' Scheme 848. | 19th Apr 1921 | Box 80 \ 1 scan0017 | |
| Advantages of fitting a permanent starting handle on 20 HP cars. | 1st Feb 1924 | Box 80 \ 1 scan0018 | |
| Design and cost of a 20 HP starting handle, comparing it with a detachable version. | 7th Feb 1924 | Box 80 \ 1 scan0019 | |
| Reintroduction of a permanent starting handle on 20 HP cars. | 6th Feb 1924 | Box 80 \ 1 scan0020 | |
| Repair instructions for a new form of cross steering tube ball joint. | 9th Apr 1916 | Box 80 \ 1 scan0021 | |
| The distribution and compilation of instruction sheets for setting the cross steering tube and verifying rear axle alignment. | 11th Apr 1916 | Box 80 \ 1 scan0022 | |
| The reduction of sheets for operations and back axle testing. | 11th Apr 1916 | Box 80 \ 1 scan0023 | |
| Revision to the drawing for the inner contact piece of the cross steering tube ball joint. | 12th Apr 1918 | Box 80 \ 1 scan0024 | |
| Mr. Royce's approved modifications to a cross tube ball joint. | 13th Apr 1916 | Box 80 \ 1 scan0025 | |
| Modifications and calculations for a strengthened cross steering tube ball joint design. | 22th Apr 1916 | Box 80 \ 1 scan0026 | |
| Calculations and suggested experiments for a cross steering tube ball joint. | 22th Apr 1916 | Box 80 \ 1 scan0027 | |
| Continuation of a report detailing strength testing procedures for a Cross Steering Tube Ball Joint. | 22th Apr 1916 | Box 80 \ 1 scan0028 | |
| Continued analysis of a cross steering tube ball joint, including a sketch and notes on experimentation. | 22th Apr 1916 | Box 80 \ 1 scan0029 | |
| Proposed design and testing of a new cross steering tube ball joint for existing chassis. | 1st Jul 1917 | Box 80 \ 1 scan0030 | |
| Tight fit on a nut and a scheme for boring the spherical part of the Brasses. | 1st Jul 1917 | Box 80 \ 1 scan0031 | |
| Modifications, testing, and future designs for cross steering tubes. | 9th Jul 1917 | Box 80 \ 1 scan0032 | |
| Cover note for document LeC.832 concerning a new type of cross steering tube ball joint. | 10th Jul 1917 | Box 80 \ 1 scan0033 | |
| Experimental improvements and various fittings for cross steering tubes, to be tested for post-war cars. | 10th Jul 1917 | Box 80 \ 1 scan0034 | |
| Suggested fixture for machining cross steering tube joint brasses. | 13th Jul 1917 | Box 80 \ 1 scan0035 | |
| New experimental design for a cross-steering tube ball joint. | 14th Jul 1917 | Box 80 \ 1 scan0036 | |
| Note on preventing joint fouling on the wheel by modifying the steering lever for Series H and onwards. | 26th Apr 1917 | Box 80 \ 1 scan0037 | |
| Cancellation notice for an experiment on a new type of cross steering tube ball joint. | 22th Aug 1917 | Box 80 \ 1 scan0038 | |
| Front pivot breakage on the Duke of Westminster's car, with proposals for design improvements. | 30th Jul 1918 | Box 80 \ 1 scan0039 | |
| Recommendation to examine and replace cracked front pivots on cars subject to very rough use. | 15th Feb 1918 | Box 80 \ 1 scan0040 | |
| Attaching a copy of LeC.982 regarding a modification to the front axle pivot. | 2nd Aug 1918 | Box 80 \ 1 scan0041 | |
| Sending a print for a front axle pivot, reference X. 3357. | 12th Aug 1917 | Box 80 \ 1 scan0042 | |
| Modifications to strengthen steering pivots after a failure on a customer's car. | 3rd Jul 1918 | Box 80 \ 1 scan0043 | |
| The redesign of a pivot, including stress calculations and instructions for new parts. | 15th Feb 1916 | Box 80 \ 1 scan0044 | |
| Advantages and consequences of centre point steering. | 15th Feb 1916 | Box 80 \ 1 scan0045 | |
| Urgent production and design of new steering pivots for a chassis. | 19th Aug 1918 | Box 80 \ 1 scan0046 | |
| From EH to Wor concerning a delay in pivot drawings, proposing to use existing forgings for their manufacture. | 2nd Sep 1918 | Box 80 \ 1 scan0047 | |
| Requesting prints and instructions for the manufacture of new front axle pivot components. | 1st Nov 1918 | Box 80 \ 1 scan0048 | |
| Extract detailing a design modification for the stub axle on the 45/50 HP Chassis. | 29th Nov 1918 | Box 80 \ 1 scan0049 | |
| List of components and part numbers for the assembly of Chassis 1. E.X. | 30th Jun 1919 | Box 80 \ 1 scan0050 | |
| List of new parts fitted to the 40/50 chassis, specifically concerning the 'Improved Steering Pivots'. | 27th Aug 1919 | Box 80 \ 1 scan0051 | |
| Modification to steering pivots and their fitment to a specific vehicle. | 7th Oct 1919 | Box 80 \ 1 scan0052 | |
| Extract from a memo detailing the status of completed experimental work. | 10th Oct 1919 | Box 80 \ 1 scan0053 | |
| Confirming that the modified steering pivots experiment is now standard. | 30th Mar 1920 | Box 80 \ 1 scan0054 | |
| Fitting of thin leaf springs and friction devices to the steering pivots on all American cars. | 9th Nov 1920 | Box 80 \ 1 scan0055 | |
| Request for information regarding the steering wheel and front wheel turning degrees for a chassis. | 7th May 1919 | Box 80 \ 1 scan0056 | |
| Steering difficulties caused by rear spring flexibility and proposing tests. | 26th Jan 1920 | Box 80 \ 1 scan0057 | |
| Modification to steering pivots, accompanied by a diagrammatic sketch of a side steering tube. | 26th Jan 1920 | Box 80 \ 1 scan0058 | |
| Steering trouble on a Trials Landaulette, proposing tests by modifying the split rear springs. | 28th Jan 1920 | Box 80 \ 1 scan0059 | |
| Testing split versus solid springs and Goodyear tyres, investigating their effects on steering stability and ride quality. | 20th Feb 1920 | Box 80 \ 1 scan0060 | |
| Improvements to the steering system, including modifications and testing proposals. | 19th Apr 1920 | Box 80 \ 1 scan0061 | |
| List of parts to be fitted to a car for West Wittering. | 19th Apr 1920 | Box 80 \ 1 scan0062 | |
| The best steering arrangement and the effects of friction on steering wheel oscillation. | 23th Apr 1920 | Box 80 \ 1 scan0063 | |
| The delay of the 6.EX Car and a list of new parts being fitted to it. | 28th May 1920 | Box 80 \ 1 scan0064 | |
| Extract from a report on chassis t.EX, detailing observations on springs, steering, body, and floorboards. | 17th Jul 1920 | Box 80 \ 1 scan0065 | |
| Comparing the steering performance of experimental car models 1.EX and 6.EX. | 23th Aug 1920 | Box 80 \ 1 scan0066 | |
| Report describing vehicle instability on a curved road track, comparing it to a belt on a pulley. | 23th Aug 1920 | Box 80 \ 1 scan0067 | |
| Comparison of 'Marmon' worm and nut steering with the company's own central points steering. | 24th Jan 1921 | Box 80 \ 1 scan0068 | |
| Steering system design, comparing wheel types and pivot adjustments for optimal performance. | 24th Jan 1921 | Box 80 \ 1 scan0069 | |
| Letter from CJ to R requesting an opinion on the experience of burst front tyres. | 23th Mar 1921 | Box 80 \ 1 scan0070 | |
| Letter detailing customer feedback on car performance, comparisons to competitors, and a concern about high-speed tyre bursts. | 18th Mar 1921 | Box 80 \ 1 scan0071 | |
| Effects of a burst front tyre on the steering of a 40/50 chassis. | 30th Mar 1921 | Box 80 \ 1 scan0072 | |
| Safety aspects of the steering gear for the 40/50 HP chassis. | 1st Apr 1921 | Box 80 \ 1 scan0073 | |
| Dangers and steering control issues associated with front tyre bursts. | 14th Apr 1921 | Box 80 \ 1 scan0074 | |
| Effects of front tyre bursts on vehicle steering and supporting the use of irreversible steering gear. | 15th Apr 1921 | Box 80 \ 1 scan0075 | |
| Clarifying an oversight regarding a proposed steering modification. | 19th Sep 1919 | Box 80 \ 1 scan0076 | |
| Telegram confirmation regarding steering columns for the first 250 chassis. | 9th Sep 1919 | Box 80 \ 1 scan0077 | |
| Arguing against a proposal to reduce the number of steering column positions, specifically defending the popular 'A' column. | 9th Sep 1919 | Box 80 \ 1 scan0078 | |
| Breakdown of steering columns ordered by type, quantity, and percentage. | 3rd Oct 1916 | Box 80 \ 1 scan0079 | |
| Front axle design, steering stability, and shock damper adjustments for a post-war chassis. | 3rd Oct 1916 | Box 80 \ 1 scan0080 | |
| Instruction to modify steering pivots by replacing thrust bearings with fibre washers to add friction. | 26th Jan 1920 | Box 80 \ 1 scan0081 | |
| Modifications to the suspension and steering to prevent wobbles and improve stability. | 24th Jan 1920 | Box 80 \ 1 scan0082 | |
| From 'R.' to 'CJ.' suggesting experiments to improve a steering system following feedback from a Mr. Horlick. | 12th Apr 1920 | Box 80 \ 1 scan0083 | |
| List of instructions for adjustments to the front axle, springs, and steering tube. | 12th Apr 1920 | Box 80 \ 1 scan0084 | |
| Steering improvements and proposing further tests and comparisons. | 19th Apr 1920 | Box 80 \ 1 scan0085 | |
| Experimental test for central point steering using disc wheels. | 19th Apr 1920 | Box 80 \ 1 scan0086 | |
| Steering system tests, proposed improvements, and standardization. | 10th May 1920 | Box 80 \ 1 scan0087 | |
| Notification regarding the receipt of parts from Vickers, Skefko Ball Bearing Co., and Lucas Electrical Co. | 28th May 1920 | Box 80 \ 1 scan0088 | |
| To Mr. Clark listing the receipt of various parts and components from suppliers. | 9th Jun 1920 | Box 80 \ 1 scan0089 | |
| List of experimental parts fitted to Chassis 6.EX. | 22th Jun 1920 | Box 80 \ 1 scan0090 | |
| Centre point steering and the fitting of thrust washers to create damping friction. | 28th Jun 1920 | Box 80 \ 1 scan0091 | |
| List of experimental parts fitted to car 6.EX for an arranged arrival at West Wittering. | 28th Jun 1920 | Box 80 \ 1 scan0092 | |
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