| Description | Date | Identifier | |
| Improvements to axle and gear assembly to reduce noise and testing requirements. | 16th Mar 1922 | Box 49 \ 2 Scan064 | |
| Inter-office correspondence regarding the lateral adjustment of a pinion on Gleason gears. | 16th Mar 1922 | Box 49 \ 2 Scan065 | |
| Adjustments made to pinion gears to reduce noise, detailing modifications to the test rig and oil return mechanisms. | 16th Mar 1922 | Box 49 \ 2 Scan066 | |
| Letter discussing the benefits of lapped gears from Gleasons in reducing road testing on axles. | 16th Mar 1922 | Box 49 \ 2 Scan067 | |
| Letter from the American office to Mr. Hives regarding the lateral adjustment of a pinion on Gleason gears. | 16th Mar 1922 | Box 49 \ 2 Scan068 | |
| Adjustments to axle gears and pinions to reduce noise and improve bedding. | 23th Mar 1922 | Box 49 \ 2 Scan069 | |
| Requesting a Goshawk 12 tooth back axle pinion to assist with the design of the Peregrine pinion. | 23th Mar 1922 | Box 49 \ 2 Scan070 | |
| Standardisation and use of a 14-tooth axle for improved performance in various conditions. | 23th Mar 1922 | Box 49 \ 2 Scan071 | |
| Instructing Stores to despatch a Rear Axle Pinion to Mr. Day for inspection. | 28th Mar 1922 | Box 49 \ 2 Scan072 | |
| Confirming the despatch of a Goshawk rear axle pinion. | 28th Mar 1922 | Box 49 \ 2 Scan073 | |
| Lateral adjustment of pinion on Gleason gears and issues with obtaining quiet axles. | 29th Mar 1922 | Box 49 \ 2 Scan074 | |
| The failure and investigation of a Goshawk-11 rear axle breakage. | 24th Apr 1922 | Box 49 \ 2 Scan075 | |
| Request for analysis of a broken axle shaft from a Goshawk-11 car. | 25th Apr 1922 | Box 49 \ 2 Scan076 | |
| Instructing Stores to despatch a portion of a broken axle shaft for examination without charge. | 28th Apr 1922 | Box 49 \ 2 Scan077 | |
| Broken and twisted rear axle shaft on the Goshawk-11 experimental car. | 28th Apr 1922 | Box 49 \ 2 Scan078 | |
| Micro-examination report on a Goshawk Rear Axle Shaft, detailing chemical analysis and structural faults. | 4th May 1922 | Box 49 \ 2 Scan079 | |
| Mechanical test results of a material before and after laboratory heat-treatment. | 18th Mar 1917 | Box 49 \ 2 Scan080 | |
| Photomicrograph showing a magnified view of a material sample. | 31th Dec 1920 | Box 49 \ 2 Scan081 | |
| Laboratory photomicrograph showing a material's structure at 50 diameters magnification. | 31th Dec 1920 | Box 49 \ 2 Scan082 | |
| Confirming modifications to the Goshawk 11 rear axle based on Mr. Royce's instructions. | 8th May 1922 | Box 49 \ 2 Scan083 | |
| Material experiments for the Goshawk II rear axle shafts due to wear on the gear teeth. | 18th May 1922 | Box 49 \ 2 Scan084 | |
| Issues with the Goshawk 11 improved differential and suggesting material and design changes. | 19th May 1922 | Box 49 \ 2 Scan085 | |
| Two proposals for fitting a pad to the Goshawk 11 rear axle to receive a tie rod. | 25th May 1922 | Box 49 \ 2 Scan086 | |
| Use of deep groove Hoffman bearings for the Goshawk II rear axle bevel pinion thrust. | 25th May 1922 | Box 49 \ 2 Scan087 | |
| Letter to the Dunlop Rubber Co. Ltd. providing the unsprung and sprung weights for the front and rear axles of a 40/50 complete car. | 30th May 1922 | Box 49 \ 2 Scan088 | |
| Trial of a Hoffmann deep groove bearing for the Goshawk rear axle. | 4th Jun 1922 | Box 49 \ 2 Scan089 | |
| Inter-office correspondence regarding the performance and implementation of the 14 T. Axle. | 9th Jun 1922 | Box 49 \ 2 Scan090 | |
| The comparative testing of two different types of Goshawk II rear axle shafts. | 12th Jun 1922 | Box 49 \ 2 Scan091 | |
| Comparative test report on standard nickel chrome vs. air-hardened axle shafts for the Goshawk 11. | 6th Jun 1922 | Box 49 \ 2 Scan092 | |
| Recommendation to reduce the oil level in the Goshawk 11 rear axle. | 20th Jun 1922 | Box 49 \ 2 Scan093 | |
| Deciding to use air-hardened steel for Goshawk back axle driving shafts in the future. | 21th Jun 1922 | Box 49 \ 2 Scan094 | |
| Experimentally correcting cross bedding in Bevel Gears on a 40/50 chassis rear axle using eccentric housings. | 1st Jul 1922 | Box 49 \ 2 Scan095 | |
| Testing a 14-tooth axle versus a 15-tooth axle on 40/50 HP cars at Brooklands Track. | 7th Jul 1922 | Box 49 \ 2 Scan096 | |
| Tests of 40/50 cars at Brooklands track, comparing 14-tooth and 15-tooth axles. | 1st Jul 1922 | Box 49 \ 2 Scan097 | |
| Use of eccentric housings for correcting cross bedding in bevel gears on a 40/50 chassis rear axle. | 1st Jul 1922 | Box 49 \ 2 Scan098 | |
| Requesting petrol consumption tests for a 40/50 car at Brooklands Track under simulated normal driving conditions. | 10th Jul 1922 | Box 49 \ 2 Scan099 | |
| Test procedure to simulate London traffic conditions. | 14th Jul 1922 | Box 49 \ 2 Scan100 | |
| Directive to cease delivery of high-compression chassis to preserve the car's traditional qualities of silence and smoothness. | 14th Jul 1922 | Box 49 \ 2 Scan101 | |
| Internal directive about maintaining testing standards, prioritizing quality and the reputation for 'silkiness and silence' over delivery pressures. | 22th Jul 1922 | Box 49 \ 2 Scan102 | |
| Vibration complaints on the 40/50 chassis, concerning open versus closed cars and changes to compression and axle ratios. | 22th Jul 1922 | Box 49 \ 2 Scan103 | |
| Issues with the 14-tooth axle and vibrations from fan belts. | 20th Jul 1922 | Box 49 \ 2 Scan104 | |
| Vibration complaints on the 40/50 chassis, potential causes, and proposed solutions. | 20th Jul 1922 | Box 49 \ 2 Scan105 | |
| Policy decision on standardizing cars with low compression and 14-tooth axles, weighing performance benefits against potential vibration issues. | 24th Oct 1927 | Box 49 \ 2 Scan106 | |
| Request for the results of experiments on different pinion thrust bearings for the Goshawk back axle. | 21th Jul 1922 | Box 49 \ 2 Scan107 | |
| Compression and axle gear ratios for 40/50hp models, comparing open and closed body styles. | 25th Jul 1922 | Box 49 \ 2 Scan108 | |
| Report discussing engine stress, performance, and the importance of weight reduction in maintaining vehicle quality. | 27th Jul 1922 | Box 49 \ 2 Scan109 | |
| From CJ to Hs requesting the results of the Brooklands experiments with 14-tooth axles. | 27th Jul 1922 | Box 49 \ 2 Scan110 | |
| Inaccurate test results at Brooklands for a car fitted with a 14-tooth axle and the plan to re-test. | 8th Aug 1922 | Box 49 \ 2 Scan111 | |
| Awaiting the results of tests on 14-tooth axles, compression and vibration at Brooklands. | 8th Aug 1922 | Box 49 \ 2 Scan112 | |
| Standardisation sheet for a modification to the machining of the Rear Axle Thrust Housing. | 1st Aug 1922 | Box 49 \ 2 Scan113 | |
| Short memo requesting the results for the Brooklands Test with the 14-tooth axle and the Goshawk. | 28th Aug 1922 | Box 49 \ 2 Scan114 | |
| Proposal for a modification to the machining of the Rear Axle Thrust housing to make quieter rear axles. | 11th Aug 1922 | Box 49 \ 2 Scan115 | |
| Modification to the rear axle thrust housing. | 11th Aug 1922 | Box 49 \ 2 Scan116 | |
| Letter to Hives regarding the lateral adjustment of the pinion on Gleason gears and comparing adjustment methods. | 16th Mar 1922 | Box 49 \ 2 Scan117 | |
| Resolving gear noise issues by adjusting pinion bedding and modifying test rigs and axle components. | 12th Aug 1922 | Box 49 \ 2 Scan118 | |
| Cost implications of a modification to the machining of the rear axle thrust housing. | 12th Aug 1922 | Box 49 \ 2 Scan119 | |
| Performance requirements and axle modifications for The Earl Of Rocksavage's new chassis. | 28th Aug 1922 | Box 49 \ 2 Scan120 | |
| Axle and engine specifications for a chassis being built for Lord Rocksavage. | 29th Aug 1922 | Box 49 \ 2 Scan121 | |
| Urgent request for a report on the Brooklands tests for the 14 and 15 tooth axle. | 1st Sep 1922 | Box 49 \ 2 Scan122 | |
| Telephone message regarding comparative petrol consumption tests for different axles and compression levels. | 15th Sep 1922 | Box 49 \ 2 Scan123 | |
| And requesting results from the Brooklands tests regarding petrol consumption for different axles and engine compressions. | 15th Sep 1922 | Box 49 \ 2 Scan124 | |
| Conditional approval for using Gleason gears on chassis prior to 1700. | 16th Sep 1922 | Box 49 \ 2 Scan125 | |
| Mr. Royce's conditional approval for a Gleason gear arrangement for chassis prior to 1700. | 16th Sep 1922 | Box 49 \ 2 Scan126 | |
| Technical memo about the performance of taking over-run thrust on a bevel pinion through the journal bearing on Gleason gears, compared with the Springfield method. | 9th Sep 1922 | Box 49 \ 2 Scan127 | |
| Scheme for taking the over-run thrust on the bevel pinion in Gleason gears. | 19th Sep 1922 | Box 49 \ 2 Scan128 | |
| Single quenching process for gears made from 5% case-hardened nickel steel. | 22th Sep 1922 | Box 49 \ 2 Scan129 | |
| Letter correcting a statement about the incorrect axle gear ratio on Goshawk chassis. | 6th Oct 1922 | Box 49 \ 2 Scan130 | |
| Telegram from Paris to Derby regarding the examination and adjustment of a rear axle and the despatch of a roller-bearing. | 7th Oct 1928 | Box 49 \ 2 Scan131 | |
| Telegraph message reporting damage to a pinion shaft cage during dismantling. | 22th Mar 1926 | Box 49 \ 2 Scan132 | |
| Works order for the dispatch of a 'Goshawk' type rear axle for experimental car 7/G/II. | 9th Oct 1922 | Box 49 \ 2 Scan133 | |
| Relaying a telegram about a Goshawk rear axle examination and adjustments. | 9th Oct 1922 | Box 49 \ 2 Scan134 | |
| Changing the axle ratio on the Goshawk-11 car for demonstration purposes. | 10th Oct 1922 | Box 49 \ 2 Scan135 | |
| Wire communication confirming the arrival of mechanics and a new axle for a Goshawk repair. | 19th Oct 1922 | Box 49 \ 2 Scan136 | |
| Telegraph confirming the arrival of mechanics to fit a new axle and roller bearing. | 11th Oct 1922 | Box 49 \ 2 Scan137 | |
| Shock absorber settings and axle ratios for the Goshawk-11 car. | 2nd Oct 1922 | Box 49 \ 2 Scan138 | |
| The allocation and shortage of 13-tooth axles for Goshawk II trials and production cars. | 16th Oct 1922 | Box 49 \ 2 Scan139 | |
| Standardisation document for fitting Gleason gears to axles on chassis prior to the 1700 series. | 16th Nov 1922 | Box 49 \ 2 Scan140 | |
| Investigating a 'booming' noise in a Limousine trials car, concluding it originates from the exhaust note synchronizing with the body. | 12th Dec 1922 | Box 49 \ 2 Scan141 | |
| Axle gear ratio for the Goshawk chassis, detailing a change for the Paris Trials car. | 12th Dec 1922 | Box 49 \ 2 Scan142 | |
| Axle gear ratios and engine specifications for Goshawk chassis demonstration cars for various overseas countries. | 11th Dec 1922 | Box 49 \ 2 Scan143 | |
| Rear axle ratios for the Goshawk chassis, including a list of cars and their fitted axles. | 13th Dec 1922 | Box 49 \ 2 Scan144 | |
| List of Goshawk chassis on test, requesting information on the axle ratios to be fitted. | 13th Dec 1922 | Box 49 \ 2 Scan145 | |
| The performance and interchange of rear axles between a 7-Goshawk-11 and a London Demonstration Car. | 18th Dec 1922 | Box 49 \ 2 Scan146 | |
| Development of a quieter Goshawk back axle to resolve noise issues and proposing a test in a demonstration limousine. | 19th Dec 1922 | Box 49 \ 2 Scan147 | |
| The potential fracture of a back axle's aluminum casing on a 20 HP chassis due to cold temperatures. | 28th Dec 1922 | Box 49 \ 2 Scan148 | |
| Letter detailing an accident with a 20 HP car in Switzerland, resulting in a cracked rear axle casing likely caused by icy conditions and extreme cold. | 18th Dec 1922 | Box 49 \ 2 Scan149 | |
| Proposing a Technical Committee meeting regarding the back axle of a 20 HP Chassis. | 9th Jan 1923 | Box 49 \ 2 Scan150 | |
| Accident involving the back axle of a Schmidt's 20 HP chassis. | 10th Jan 1923 | Box 49 \ 2 Scan151 | |
| The performance of a 5-Goshawk-11 model, detailing the quiet operation and considerations for modifications. | 19th Jan 1923 | Box 49 \ 2 Scan152 | |
| Failure of a Goshawk 11 axle on Mr. Schmidt's car and a proposed modification. | 2nd Feb 1923 | Box 49 \ 2 Scan153 | |
| Modifications to the Goshawk rear axle centre casing to prevent breakage. | 3rd Mar 1923 | Box 49 \ 2 Scan154 | |
| The supply problems of Gleason gears for repairs, proposing to standardise on alternative gear ratios. | 15th Mar 1923 | Box 49 \ 2 Scan155 | |
| Paris invoices and determining which company account to debit for a broken axle on chassis 41-G5. | 6th Apr 1923 | Box 49 \ 2 Scan156 | |
| Standardisation document for a modification to the 20 HP rear axle casing. | 7th Mar 1923 | Box 49 \ 2 Scan157 | |
| Axle parts for chassis 20 HP, 41-G-5, returning them to the Works and charging invoices to production. | 13th Apr 1923 | Box 49 \ 2 Scan158 | |
| Improvements to the Goshawk rear axle by making the bevel gear slightly coarser. | 26th Apr 1923 | Box 49 \ 2 Scan159 | |
| Liability for repair costs on a 20-HP Chassis 41-G-5 following an accident. | 1st May 1923 | Box 49 \ 2 Scan160 | |
| Advantages and implementation of larger pitch bevel gears for the 20HP chassis axle. | 1st May 1923 | Box 49 \ 2 Scan161 | |
| Requesting reconsideration to switch production to larger pitch bevel gears to prevent financial waste. | 19th Jul 1917 | Box 49 \ 2 Scan162 | |
| Delayed report on broken parts for chassis 41-G-5 and the decision not to blame the overseas agent. | 7th May 1923 | Box 49 \ 2 Scan163 | |
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