| Description | Date | Identifier | |
| Outlining the required order for a series of revolving tests on various components. | 9th Feb 1917 | Box 49 \ 1 Scan046 | |
| Letter from a supplier offering a new type of case-hardening steel with details on its purity, physical properties, and price. | 30th Oct 1918 | Box 49 \ 1 Scan047 | |
| Letter from Sir W.G. Armstrong, Whitworth & Co. Ltd. regarding a sample of E.M.C.H case-hardening steel. | 4th Nov 1918 | Box 49 \ 1 Scan048 | |
| Requesting an order for 6 carbon steel blanks for a Rear Axle Bevel G.1909. | 22th Nov 1918 | Box 49 \ 1 Scan049 | |
| Drawing for an Armstrong Whitworth Rear Axle Bevel Wheel blank made from E.N.C.H. Steel. | 26th Apr 1917 | Box 49 \ 1 Scan050 | |
| Extract discussing the design and manufacturing of a bevel gear for the back axle using a Gleason machine. | 28th Apr 1917 | Box 49 \ 1 Scan051 | |
| Extract from a memo discussing the failure of back axle tubes and the implementation of an improved design. | 26th Apr 1917 | Box 49 \ 1 Scan052 | |
| Extract from a memo discussing the design of new nickel steel tubes for post-war chassis. | 29th Nov 1918 | Box 49 \ 1 Scan053 | |
| Extract of a memorandum discussing the production of rear axle bevel gears, comparing in-house plain bevels with outsourced Gleason spiral bevels. | 26th Apr 1917 | Box 49 \ 1 Scan054 | |
| Analysis of noise issues with Gleason spiral bevel gears and a recommendation to source improved versions from America. | 26th Oct 1918 | Box 49 \ 1 Scan055 | |
| Notes from a meeting with Mr. Royce discussing improvements to front engine cases, pistons, crankshafts, and the rear axle. | 16th Dec 1918 | Box 49 \ 1 Scan056 | |
| Cover letter for a specification of alterations to the 40/50 HP chassis. | 8th Jan 1919 | Box 49 \ 1 Scan057 | |
| Alterations and experimental work for the 40/50 HP present type chassis X.2565. | 18th Dec 1918 | Box 49 \ 1 Scan058 | |
| Issues and potential modifications for the clutch, gearbox, and back axle. | 18th Dec 1918 | Box 49 \ 1 Scan059 | |
| Whether to proceed with or cancel an experiment on strengthening a rear axle tube by inserting a sleeve. | 6th Jan 1919 | Box 49 \ 1 Scan060 | |
| The back axle for a small chassis, requesting blueprints for additional instructions. | 21th Jan 1919 | Box 49 \ 1 Scan061 | |
| Instruction to produce the rear axle bevel G.1909 from previously ordered carbon steel blanks. | 22th Jan 1919 | Box 49 \ 1 Scan062 | |
| Potential changes to gearbox and axle manufacturing, urging caution and reliance on experimental proof before implementation. | 22th Jan 1919 | Box 49 \ 1 Scan063 | |
| Instruction to machine six carbon steel blanks into a bevel wheel for a 40/50 HP chassis rear axle. | 29th Jan 1919 | Box 49 \ 1 Scan064 | |
| Sending a blueprint with pencil alterations for an instruction plate on the 20 HP back axle. | 18th Feb 1919 | Box 49 \ 1 Scan065 | |
| Proposal from Mr. Royce to create a new pair of bevel gears with a greater reduction ratio for the rear axle. | 28th Mar 1919 | Box 49 \ 1 Scan066 | |
| Testing of petrol consumption with different back axle ratios. | 28th Mar 1919 | Box 49 \ 1 Scan067 | |
| Requesting blueprints to be issued for a drawing of a 40/50 HP Chassis Rear Axle. | 3rd Apr 1919 | Box 49 \ 1 Scan068 | |
| Petrol consumption and back axle ratios for different chassis configurations. | 3rd Apr 1919 | Box 49 \ 1 Scan069 | |
| Typed memorandum detailing a road resistance test procedure for vehicles. | 3rd Apr 1919 | Box 49 \ 1 Scan070 | |
| Fitting Michelin wheels to the 20 HP chassis, detailing required axle modifications. | 3rd May 1919 | Box 49 \ 1 Scan071 | |
| Receipt of felt washers, ruby mica, and bearings from various suppliers for experiments. | 2nd Jun 1919 | Box 49 \ 1 Scan072 | |
| Design changes to lighten the 20 HP rear axle. | 3rd Jun 1919 | Box 49 \ 1 Scan073 | |
| Continuation memo regarding the detailing of hubs and the ordering of forgings and ball bearings. | 3rd Jun 1919 | Box 49 \ 1 Scan074 | |
| Instruction memo to produce three sets of back axle bevels for the 20 HP chassis. | 11th Jun 1919 | Box 49 \ 1 Scan075 | |
| Calculations for the 20 HP chassis gears, including speeds, tyre dimensions and various ratios. | 12th Jun 1919 | Box 49 \ 1 Scan076 | |
| The drawing for a 20 HP back axle and initiating the necessary detail work. | 4th Jul 1919 | Box 49 \ 1 Scan077 | |
| Design and ordering of the 20 HP back axle tube, referencing drawing LeC.1106. | 18th Jul 1919 | Box 49 \ 1 Scan078 | |
| Design, materials, and manufacturing process for a torque tube and related components. | 22th Jul 1919 | Box 49 \ 1 Scan079 | |
| Design of a shaft coupling, focusing on simplicity and manufacturing. | 22th Jul 1919 | Box 49 \ 1 Scan080 | |
| Drawing LeC.1116 for a washer used to lock bolts on the 20 HP rear axle brake drum flange. | 26th Jul 1919 | Box 49 \ 1 Scan081 | |
| Design and construction of a 20 HP rear axle stay, referencing drawing LeC.1115. | 26th Jul 1919 | Box 49 \ 1 Scan082 | |
| Completion of design work on the 20 HP rear axle, specifically the driving shaft and torque tube. | 26th Jul 1919 | Box 49 \ 1 Scan083 | |
| Adjustments for the 20 HP rear axle to accommodate wider springs. | 26th Jul 1919 | Box 49 \ 1 Scan084 | |
| Test report on Chassis 1.E.X, covering rear axle performance, handling on bad roads, tyres, and electrical equipment. | 28th Jul 1919 | Box 49 \ 1 Scan085 | |
| Test report on the gearbox, rear axle, and brakes of chassis I.E.X. | 28th Jul 1919 | Box 49 \ 1 Scan086 | |
| Querying an oil leak observed on the back axle torque tube joints of chassis 7 CA. | 1st Aug 1919 | Box 49 \ 1 Scan087 | |
| Lubrication of the Control Sphere on a 40/50 HP chassis. | 20th Aug 1919 | Box 49 \ 1 Scan088 | |
| Fitting diaphragms to the rear axle tubes on the 40/50 chassis to prevent oil getting on the brakes. | 18th Sep 1919 | Box 49 \ 1 Scan089 | |
| The completion and strength concerns of 3.47 to 1 ratio back axle gears. | 25th Jul 1938 | Box 49 \ 1 Scan090 | |
| Letter confirming the dispatch of 6 sets of Spiraloid Bevel Gears to Messrs Gordon & Co for special cutting. | 8th Aug 1919 | Box 49 \ 1 Scan091 | |
| Inspection report detailing the condition and acceptance of Spiral Bevel Gears from Gleason Works. | 26th Aug 1919 | Box 49 \ 1 Scan092 | |
| The carbonizing, testing, and shipping of wheels and pinions, page 2. | 26th Aug 1919 | Box 49 \ 1 Scan093 | |
| Hand-drawn sketches detailing the finished and unfinished sections of a bevel wheel and a cross-section showing machining details. | 26th Aug 1919 | Box 49 \ 1 Scan094 | |
| Internal correspondence regarding customer Mr. Mills' chassis 32 PB and potential modifications. | 9th Sep 1919 | Box 49 \ 1 Scan095 | |
| Heavy petrol consumption and the potential impact of a low top gear on a specific customer's car. | 29th Sep 1919 | Box 49 \ 1 Scan096 | |
| Completion status of several experimental work items. | 10th Oct 1919 | Box 49 \ 1 Scan097 | |
| Letter chasing a supplier, Messrs Gordon & Co., for a progress report and delivery date for Spiral Bevel Gears. | 25th Oct 1919 | Box 49 \ 1 Scan098 | |
| Performance improvements from fitting a lower geared axle. | 27th Oct 1919 | Box 49 \ 1 Scan099 | |
| Confirmation of a telegram to Messrs Gordon & Co. regarding the urgent delivery of spiral bevel gears in pairs. | 31th Oct 1919 | Box 49 \ 1 Scan100 | |
| Letter to Messrs Gordon & Co regarding a delay and misunderstanding in the supply of bevel wheels and pinions. | 31th Oct 1919 | Box 49 \ 1 Scan101 | |
| Letter expressing concern over the extended production time for gears and urging for quicker progress. | 31th Oct 1919 | Box 49 \ 1 Scan102 | |
| Solutions for failing rear axle tubes and inquiring about experimental testing of new schemes. | 10th Nov 1919 | Box 49 \ 1 Scan103 | |
| Query regarding a delivery promise for a quiet lower geared axle for a 32-PB model. | 13th Nov 1919 | Box 49 \ 1 Scan104 | |
| Stop-work notice for the 'Goshawk' rear axle combination ring (N.1377), pending a new drawing. | 10th Dec 1919 | Box 49 \ 1 Scan105 | |
| The testing of five Gleason-type skew gear bevels for rear axles and a recommendation for their standardization. | 22th Nov 1919 | Box 49 \ 1 Scan106 | |
| Internal correspondence regarding the testing and ordering of spiral bevel gears. | 25th Nov 1919 | Box 49 \ 1 Scan107 | |
| Request to fit a Gleason Bevel axle to a car for a 10,000-mile run. | 28th Nov 1919 | Box 49 \ 1 Scan108 | |
| Approval for the adoption of spiral bevels and to proceed with sourcing a supply from America. | 29th Nov 1919 | Box 49 \ 1 Scan109 | |
| Request to provide a Gleason Bevel Axle to Mr. Hives for a 10,000-mile test trials car. | 1st Dec 1919 | Box 49 \ 1 Scan110 | |
| Proposal to change the material for rear axle casings from Mild Steel to 3.5% Nickel Steel following reports of collapse. | 11th Dec 1919 | Box 49 \ 1 Scan111 | |
| Laboratory copy discussing the benefits of using 3.5% Nickel Steel over Mild Steel for rear axle casings. | 31th Dec 1919 | Box 49 \ 1 Scan112 | |
| Requesting the release of an axle fitted with Gleason bevels for a 10,000-mile test chassis. | 21th Feb 1919 | Box 49 \ 1 Scan113 | |
| Confirming a Gleason Bevel axle, No.15-LW, was sent to Mr. Hives for a 10,000 miles test chassis. | 2nd Dec 1919 | Box 49 \ 1 Scan114 | |
| Fitting of American-made spiral bevel axles to Trials Cars for observation. | 25th Nov 1919 | Box 49 \ 1 Scan115 | |
| Visit to E.N.V. Motor Company regarding their Gleason cut gears and hardening plant. | 10th Dec 1919 | Box 49 \ 1 Scan116 | |
| The gear blank quenching process and discussions regarding gear supply and delivery schedules. | 1st Feb 1919 | Box 49 \ 1 Scan117 | |
| Material change for the rear axle casing from Mild Steel to Nickel Steel due to reported failures. | 11th Dec 1919 | Box 49 \ 1 Scan118 | |
| Material selection for a rear axle casing, specifically 3% Nickel steel. | 15th Dec 1919 | Box 49 \ 1 Scan119 | |
| List of modifications and new parts to be fitted to chassis 2.EX. | 29th Dec 1919 | Box 49 \ 1 Scan120 | |
| Laboratory recommendation to change the material for rear axle casings from Mild Steel to Nickel Steel. | 31th Dec 1919 | Box 49 \ 1 Scan121 | |
| Standardisation of Gleason Skew Bevels for the rear axle to overcome noise. | 2nd Jan 1920 | Box 49 \ 1 Scan122 | |
| Urgent need for a signed standardisation sheet for Gleason type spiral bevel gears. | 1st Jan 1920 | Box 49 \ 1 Scan123 | |
| Confirming the adoption of 3.5% Nickel steel for the back axle drop forgings of the central case. | 3rd Jan 1920 | Box 49 \ 1 Scan124 | |
| Confirming the adoption of 3.5% Nickel steel for the rear axle casing. | 3rd Jan 1920 | Box 49 \ 1 Scan125 | |
| List of new parts fitted to a car for a 10,000-mile test run, along with remarks and observations. | 1st Jul 1934 | Box 49 \ 1 Scan126 | |
| Weight comparison between a pair of Gleason Bevels and a pair of Standard Straight Bevels. | 1st Jan 1920 | Box 49 \ 1 Scan127 | |
| Extract detailing a road test of a Special Gleason Type Axle on a trials car. | 15th Jan 1920 | Box 49 \ 1 Scan128 | |
| Notice regarding two rear axles short for cars on test, requesting arrangements for their replacement. | 13th Jan 1920 | Box 49 \ 1 Scan129 | |
| Instructing the works to manufacture a replacement rear axle for a 10,000-mile test car. | 17th Jan 1920 | Box 49 \ 1 Scan130 | |
| From CJ to R discussing a noticeable hum from the back axle of an experimental car, possibly caused by Michelin disc wheels. | 22th Jan 1920 | Box 49 \ 1 Scan131 | |
| Letter reporting a noticeable hum from the back axle of an experimental car fitted with Michelin Disc Wheels. | 22th Jan 1920 | Box 49 \ 1 Scan132 | |
| Letter from CJ to R about a noticeable hum from a Gleason-type back axle, possibly caused by Michelin Disc Wheels. | 22th Jan 1920 | Box 49 \ 1 Scan133 | |
| Handling instability and planned modifications for the London Trials Car. | 23th Jan 1920 | Box 49 \ 1 Scan134 | |
| Typed memorandum about road testing a car with and without shock absorbers, and plans for comparison tests against a Lanchester and a Lancia. | 23th Jan 1920 | Box 49 \ 1 Scan135 | |
| Noisy back axle on the 2.EX experimental car after 10,000 miles, possibly caused by fitting Michelin Disc Wheels. | 23th Jan 1920 | Box 49 \ 1 Scan136 | |
| Back axle noise on the 2.EX experimental car, suspecting the cause to be the recently fitted Michelin Disc Wheels. | 23th Jan 1920 | Box 49 \ 1 Scan137 | |
| Status report on the 2.EX chassis, detailing component condition, mileage, and fuel consumption. | 28th Jan 1920 | Box 49 \ 1 Scan138 | |
| Extract listing items and modifications proposed for a 'Trials Car for America' chassis. | 1st Feb 1920 | Box 49 \ 1 Scan139 | |
| Proposing a change of material for the Gleason Bevel Wheel from Ubas to C.H.N.S. | 2nd Feb 1920 | Box 49 \ 1 Scan140 | |
| Short memo regarding the use of C.H.N.S. steel versus Ubas steel for bevel gears. | 1st Feb 1920 | Box 49 \ 1 Scan141 | |
| Lubrication of the rear axle brake mechanism, referencing complaints from America. | 2nd Feb 1920 | Box 49 \ 1 Scan142 | |
| Requesting an update on the delivery of Gleason Bevels from America. | 12th Feb 1920 | Box 49 \ 1 Scan143 | |
| Request to obtain Gleason Bevel gears from America for a quieter, lower geared back axle. | 3rd Feb 1920 | Box 49 \ 1 Scan144 | |
| Performance of a low-geared back axle on car 49-GB and plans for further comparative testing. | 12th Feb 1920 | Box 49 \ 1 Scan145 | |
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