| Description | Date | Identifier | |
| The 'Goshawk' brake gear, sending blueprints for Scheme 663 for fastening brackets and levers to the back axle. | 30th Nov 1920 | Box 49 \ 1 Scan246 | |
| Failure of 2-BA spring washers and proposing alternative solutions. | 15th Dec 1920 | Box 49 \ 1 Scan247 | |
| Proposed adaptation of the Goshawk rear axle for the 'Kite' model. | 24th Dec 1920 | Box 49 \ 1 Scan248 | |
| Modifications to a bevel pinion bearing arrangement for a universal joint. | 24th Dec 1920 | Box 49 \ 1 Scan249 | |
| Back axle ratio, associated transmission knock issues, and proposals for new gear ratios. | 29th Dec 1920 | Box 49 \ 1 Scan250 | |
| Continued discussion on transmission behavior and petrol consumption. | 29th Dec 1920 | Box 49 \ 1 Scan251 | |
| Material selection for the rear axle casing, comparing 3½% Nickel steel with mild steel. | 30th Dec 1920 | Box 49 \ 1 Scan252 | |
| Material choice for the rear axle casing, suggesting a return to mild steel over Nickel steel. | 30th Dec 1920 | Box 49 \ 1 Scan253 | |
| Recommendation on the order of allotment for refixing 15 x 52 rear axles to cars due to noise issues. | 5th Jan 1921 | Box 49 \ 1 Scan254 | |
| Comparative stresses on the Goshawk II and 40/50 back axles. | 17th Jan 1922 | Box 49 \ 1 Scan255 | |
| Preliminary road test report on the 'Goshawk' chassis, detailing the performance of various components. | 1st Jan 1921 | Box 49 \ 1 Scan256 | |
| Test report on vehicle components including the side brake, radiator, clutch, springing, and performance characteristics. | 8th Jan 1921 | Box 49 \ 1 Scan257 | |
| Material for the rear axle casing, referencing previous notes on the subject. | 3rd Jan 1921 | Box 49 \ 1 Scan258 | |
| Issues and recommendations for the clutch, rear axle, and suspension systems. | 1st Jan 1921 | Box 49 \ 1 Scan259 | |
| Technical notes on the springing, weight, vibration, and steering of the 'Goshawk' model. | 12th Jan 1921 | Box 49 \ 1 Scan260 | |
| Design updates for the Goshawk II project, including the gearbox, universal joint, cylinder head, and ancillaries. | 18th Jan 1921 | Box 49 \ 1 Scan261 | |
| Modifications to the carburettor, valve gear, suspension, frame, and drivetrain components. | 18th Jan 1921 | Box 49 \ 1 Scan262 | |
| Modifications to the axle tube and rear wheel driver for the 'Goshawk 11' project. | 29th Jan 1921 | Box 49 \ 1 Scan263 | |
| Observation on a car's low gear ratio on the rear axle and associated vibrations. | 30th Nov 1921 | Box 49 \ 1 Scan264 | |
| Design updates and progress on the Goshawk II's back axle, brakes, and wheels. | 1st Feb 1921 | Box 49 \ 1 Scan265 | |
| Note regarding work on the Goshawk I car, including fitting new gears, examining the clutch, and fitting battery ignition. | 7th Feb 1921 | Box 49 \ 1 Scan266 | |
| Modifications to the 'Goshawk 11' rear axle centre gearbox. | 14th Feb 1921 | Box 49 \ 1 Scan267 | |
| Note about the diameter of a tapered tube and the promise to send a modulus graph for revised axle tubes. | 14th Feb 1921 | Box 49 \ 1 Scan268 | |
| Modifications to the 'Goshawk II' back axle tube to reduce its weight. | 15th Feb 1921 | Box 49 \ 1 Scan269 | |
| Recommending a new scheme of fitting rear axle brake brackets using bolts and solder instead of brazing. | 17th Feb 1921 | Box 49 \ 1 Scan270 | |
| Recommendation to standardize a new method of fitting brake brackets to the rear axle tube using bolts and solder, replacing brazing. | 17th Feb 1921 | Box 49 \ 1 Scan271 | |
| Letter from Mr. Olley to Mr. Hives questioning the material change from mild steel to nickel steel for back axle box forgings. | 22th Feb 1921 | Box 49 \ 1 Scan272 | |
| Recommendation to standardise a new scheme for fitting brake brackets to the rear axle tube using bolts and solder, instead of brazing. | 22th Feb 1921 | Box 49 \ 1 Scan273 | |
| Wear on a rear axle pinion and recommending the standardisation of a new double thrust bearing. | 1st Mar 1921 | Box 49 \ 1 Scan274 | |
| Standardisation for fixing brake brackets on to axle tubes with bolts and solder. | 2nd Mar 1921 | Box 49 \ 1 Scan275 | |
| Urgent request for costing a standardisation sheet concerning the fixing of brake brackets to an axle. | 2nd Mar 1921 | Box 49 \ 1 Scan276 | |
| Approval memo for the Goshawk II back axle tube design. | 7th Mar 1921 | Box 49 \ 1 Scan277 | |
| Standardisation of a 15 toothed axle ratio based on a recommendation from Mr. Royce. | 16th Mar 1921 | Box 49 \ 1 Scan278 | |
| Review and signature on standardisation sheets for fixing brake brackets and a double thrust bearing. | 7th Mar 1921 | Box 49 \ 1 Scan279 | |
| Requesting review and signature for a standardisation sheet on fixing brake brackets to axle tubes. | 7th Mar 1921 | Box 49 \ 1 Scan280 | |
| Experiment to fix brake brackets to axle tubes using bolts and solder, now being standardized. | 7th Mar 1921 | Box 49 \ 1 Scan281 | |
| The approval and design of Goshawk II back axle tubes. | 9th Mar 1921 | Box 49 \ 1 Scan282 | |
| The production of bevel gears for the rear axle, comparing 15/52, 16/52, and 14/52 ratios. | 17th Mar 1921 | Box 49 \ 1 Scan283 | |
| Mr. Royce's recommendation on standardizing axle ratios. | 16th Aug 1921 | Box 49 \ 1 Scan284 | |
| Production strategy and preference for different bevel gear ratios for the rear axle. | 17th Mar 1921 | Box 49 \ 1 Scan285 | |
| Minutes of a conference discussing defects and improvements for the 40/50 HP Chassis, focusing on back axles. | 6th Apr 1921 | Box 49 \ 1 Scan286 | |
| Requesting Mr. Royce's signature on a standardisation sheet for fixing brake brackets. | 19th Mar 1921 | Box 49 \ 1 Scan287 | |
| To remind Mr. Royce to sign the standardisation sheet for the double thrust bearing for rear axle pinion. | 19th Mar 1921 | Box 49 \ 1 Scan288 | |
| From Rs. to HS regarding the standardization sheet for a double thrust bearing in the rear axle. | 22th Mar 1921 | Box 49 \ 1 Scan289 | |
| Distributing a standardisation sheet for fixing brake brackets onto axle tubes. | 22th Mar 1921 | Box 49 \ 1 Scan290 | |
| Distributing a standardisation sheet for a double thrust bearing for a rear axle pinion. | 30th Mar 1921 | Box 49 \ 1 Scan291 | |
| Standardisation of a double thrust bearing for a rear axle pinion. | 8th Nov 1920 | Box 49 \ 1 Scan292 | |
| Fractured Gleason Bevel Gears and a quality dispute between the Derby and Springfield locations. | 1st Apr 1921 | Box 49 \ 1 Scan293 | |
| Fitting a 15-tooth axle to Lord Rocksavage's chassis and the need for further tests. | 13th Apr 1921 | Box 49 \ 1 Scan294 | |
| Further testing required on a lower geared axle for Lord Rocksavage's chassis and its effect on high speed. | 13th Apr 1921 | Box 49 \ 1 Scan295 | |
| Comparison of 15 and 16 tooth axles and their effect on a vehicle's maximum speed, with data from tests at Brooklands. | 14th Apr 1921 | Box 49 \ 1 Scan296 | |
| Benefits and drawbacks of standardising the 15-tooth axle for all cars. | 14th Apr 1921 | Box 49 \ 1 Scan297 | |
| Comparison of the effect of 15 and 16 tooth axles on a car's maximum speed based on tests at Brooklands. | 4th Apr 1921 | Box 49 \ 1 Scan298 | |
| Standardisation of the 15-tooth axle, weighing its performance benefits against a slight increase in petrol consumption. | 14th Apr 1921 | Box 49 \ 1 Scan299 | |
| Brief memo regarding a comparison of 15 and 16-tooth axles. | 15th Apr 1921 | Box 49 \ 1 Scan300 | |
| Confirming unanimity on the comparison of 15 and 16-tooth axles. | 15th Apr 1921 | Box 49 \ 1 Scan301 | |
| Fitting of a rear axle with 14/52 bevels and double thrust housing to chassis 1.EX. | 23th Apr 1921 | Box 49 \ 1 Scan302 | |
| Rear axle with 14/52 bevels and double thrust housing fitted to chassis 1.EX. | 23th Apr 1921 | Box 49 \ 1 Scan303 | |
| Failures of single thrust bearings on Gleason bevel gears and recommending the standardisation of a double thrust bearing. | 25th Apr 1921 | Box 49 \ 1 Scan304 | |
| Instructions for the release and modification of blueprints for the Goshawk 11 rear axle centre gearbox. | 25th Apr 1921 | Box 49 \ 1 Scan305 | |
| Letter from the American branch to London regarding the safety of changing the brake bracket attachment method from brazing to soldering. | 25th Apr 1921 | Box 49 \ 1 Scan306 | |
| Failures of single thrust bearings on bevel pinion Gleason gears and the proposed solution of a double thrust bearing. | 25th Apr 1921 | Box 49 \ 1 Scan307 | |
| Positive performance results of fitting a new 14/52 axle ratio on a test car. | 1st May 1921 | Box 49 \ 1 Scan308 | |
| C.L. Freeston's trip through the Alps, recommending a 14-tooth axle. | 4th May 1921 | Box 49 \ 1 Scan309 | |
| The failure of the rear axle bevel pinion thrust race and a proposal for design modification. | 11th May 1921 | Box 49 \ 1 Scan310 | |
| C.L. Freeston's trip through the Alps and a recommendation for a 14-tooth axle. | 4th May 1921 | Box 49 \ 1 Scan311 | |
| Extract requesting a confirmatory report on the results of extra thrust applied to a rear bevel pinion. | 18th May 1921 | Box 49 \ 1 Scan312 | |
| Cause of loose brake brackets on the rear axle of the 4.EX Car. | 23th May 1921 | Box 49 \ 1 Scan313 | |
| Improvements to axle bracket fixings and materials following a failure on the 4.EX car. | 23th May 1921 | Box 49 \ 1 Scan314 | |
| Issues and tests conducted on thrust Gleason bevel gears and associated bearings. | 24th May 1921 | Box 49 \ 1 Scan315 | |
| The dynamometer testing of journal and thrust bearings for the bevel pinion and axle assembly. | 24th May 1921 | Box 49 \ 1 Scan316 | |
| Testing and subsequent failure of a reverse pinion on a 7.CA car. | 24th May 1921 | Box 49 \ 1 Scan317 | |
| Inquiring about the readiness of a 14-tooth axle to be fitted to a car for a tour of the Alps. | 24th May 1921 | Box 49 \ 1 Scan318 | |
| Correcting the number of teeth on an axle from fifteen to fourteen for Captain Strong's car. | 25th May 1921 | Box 49 \ 1 Scan319 | |
| Recommendation against a 14-tooth axle, suggesting a 15-tooth axle for better performance compared to the Austrian Trials' Cars. | 25th May 1921 | Box 49 \ 1 Scan320 | |
| Root cause of issues with Gleason bevel thrust races. | 26th May 1921 | Box 49 \ 1 Scan321 | |
| Load and thrust calculations for a bevel pinion and propeller shaft. | 26th May 1921 | Box 49 \ 1 Scan322 | |
| Questioning the choice of a 15-tooth axle over a 14-tooth axle for Mr. Freeston's mountain-climbing test. | 25th May 1921 | Box 49 \ 1 Scan323 | |
| Questioning the choice between a 15-tooth and 14-tooth axle for a mountain-climbing test. | 27th May 1921 | Box 49 \ 1 Scan324 | |
| Recurring failure of the rear axle bevel pinion thrust race on a customer's car. | 3rd Jun 1921 | Box 49 \ 1 Scan325 | |
| Fault with the 40/50 chassis double thrust bearing and recommending a production halt. | 1st Jun 1921 | Box 49 \ 1 Scan326 | |
| Faults and ongoing tests concerning thrust washers, journal bearings, bevel pinions, and electrical equipment. | 1st Aug 1921 | Box 49 \ 1 Scan327 | |
| Letter from Rolls-Royce of America regarding issues with Gleason gears and thrust bearings on low geared axles. | 7th Jun 1921 | Box 49 \ 1 Scan328 | |
| Report listing reliability issues with electrical components and comparing them to a more reliable Delco system. | 1st Jun 1921 | Box 49 \ 1 Scan329 | |
| Comparing electrical equipment from Marmon, Smith and Lucas, and discussing quality control issues related to production. | 7th Jun 1921 | Box 49 \ 1 Scan330 | |
| Letter from Rolls-Royce of America concerning issues with Gleason gears, low geared axles, and proposals for bearing modifications. | 27th Jun 1921 | Box 49 \ 1 Scan331 | |
| Dynamometer test results detailing a recurring issue with a loose nut on the bevel pinion's thrust washer. | 9th Jun 1921 | Box 49 \ 1 Scan332 | |
| Faulty thrust bearing from chassis 70-EE, which was soft and out of line. | 22th Jun 1921 | Box 49 \ 1 Scan333 | |
| Comparative test between an open Trials Car and the 1.EX Car fitted with a 14-tooth axle. | 24th Jun 1921 | Box 49 \ 1 Scan334 | |
| Arrangement for comparative performance tests between a car with a 14-tooth axle and the Open Trials Car, Chassis 81-TW. | 25th Jun 1921 | Box 49 \ 1 Scan335 | |
| Trial on a closed car, standardizing the use of 15-tooth axles and medium compression engines. | 29th Jun 1921 | Box 49 \ 1 Scan336 | |
| Tests and modifications for a double thrust bearing for Gleason bevel gears. | 30th Jun 1921 | Box 49 \ 1 Scan337 | |
| Recurring fault with thrust bearings and recommending the production of a new 'double thrust' bearing design. | 30th Jun 1921 | Box 49 \ 1 Scan338 | |
| Issues and tests related to a double thrust bearing for Gleason bevel gears. | 30th Jun 1921 | Box 49 \ 1 Scan339 | |
| Recommendation to change policy on thrust bearings due to recurring failures, seeking instructions from Mr. Royce. | 30th Jun 1921 | Box 49 \ 1 Scan340 | |
| From CJ to Hs enquiring about the petrol consumption of a 14-tooth component on 40/50 HP cars. | 1st Jul 1921 | Box 49 \ 1 Scan341 | |
| Comparison of the performance of 14-tooth and 15-tooth axles in different car configurations. | 2nd Jul 1921 | Box 49 \ 1 Scan342 | |
| Telegram instructing Hives to create standardization sheets for future chassis with Gleason gears and specific bearing configurations. | 27th Aug 1917 | Box 49 \ 1 Scan343 | |
| The standardisation of a double thrust bearing for Gleason Bevel Gears on the rear axle. | 4th Jul 1921 | Box 49 \ 1 Scan344 | |
| Extract concerning a double-thrust scheme for the rear axle on cars for America. | 1st Jul 1921 | Box 49 \ 1 Scan345 | |
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