| Description | Date | Identifier | |
| Investigation into starter motor slipping due to worn teeth, poor cork discs, and excess oil, detailing solutions. | 24th Jun 1927 | Box 40 \ 5 Scan181 | |
| List of new springs with part numbers incorporated into a unit. | 24th Jun 1927 | Box 40 \ 5 Scan182 | |
| Blueprint illustrating four sketches of a flywheel engagement mechanism, detailing potential spring and engagement failures. | 23th Sep 1927 | Box 40 \ 5 Scan183 | |
| Blank document page with a red date stamp in the bottom right corner. | 23th Sep 1927 | Box 40 \ 5 Scan184 | |
| Blueprint for the addition of oil throwing grooves to an operating bush for a 20HP starter. | 26th Sep 1927 | Box 40 \ 5 Scan185 | |
| Sticking issues and potential improvements for a 20 HP starter mechanism. | 29th Jun 1927 | Box 40 \ 5 Scan186 | |
| Technical memorandum suggesting alterations to the 20 HP Bijur starter to improve performance. | 9th Jul 1927 | Box 40 \ 5 Scan187 | |
| Suggestions for modifications to the 20 HP Improved Bijur starter for improved reliability and standardisation. | 12th Jul 1927 | Box 40 \ 5 Scan188 | |
| Second modification for future work on the 20 HP Bijur clutch system. | 14th Jul 1927 | Box 40 \ 5 Scan189 | |
| Improvements to the 20 HP starter, including new parts and production updates. | 14th Jul 1927 | Box 40 \ 5 Scan190 | |
| Proposed modifications and trial schemes for the 20HP starter pinion. | 16th Jul 1927 | Box 40 \ 5 Scan191 | |
| On the two-stage improvements for the 20 HP starter, comparing modifications to the current Bijur system versus a new R-R scheme. | 7th Sep 1927 | Box 40 \ 5 Scan192 | |
| Internal memorandum discussing the production status and testing of a 20 HP starter motor and its components. | 29th Sep 1927 | Box 40 \ 5 Scan193 | |
| Investigation into a slipping trouble on the 20 HP starter motor, caused by a worn cork washer. | 29th Sep 1927 | Box 40 \ 5 Scan194 | |
| Investigation report into failures of the 20 HP starter motor, detailing causes and remedies. | 24th Jun 1927 | Box 40 \ 5 Scan195 | |
| Analysis of starter unit pinion engagement, detailing spring modifications and a solution for clutch slipping due to excess oil. | 1st Nov 1927 | Box 40 \ 5 Scan196 | |
| Investigation into improved 20 HP starter stops to prevent sticking, proposing to standardise the circumferential teeth type. | 1st Nov 1927 | Box 40 \ 5 Scan197 | |
| Investigation into increased initial friction in the 20 HP starter pinion unit. | 27th Nov 1927 | Box 40 \ 5 Scan198 | |
| Recommendation to modify the 20 HP starter motor design by incorporating circumferential teeth for the stop. | 21th Nov 1927 | Box 40 \ 5 Scan199 | |
| Standardisation of a modified 20 HP Starter Drive to improve reliability. | 21th Nov 1927 | Box 40 \ 5 Scan200 | |
| Form for the standardization of chassis parts, specifically the CR. Brake Drum. | 9th Apr 1928 | Box 40 \ 5 Scan201 | |
| Recommending the deletion of a lubricating scheme for the 20 HP Multiple Clutch Starter Motor. | 21th Mar 1928 | Box 40 \ 5 Scan202 | |
| Starter motor slippage on a 25 HP engine, recommending the main spring be made stronger. | 3rd Dec 1930 | Box 40 \ 5 Scan203 | |
| Spring replacement for the 25 HP starter motor to increase load before slipping. | 4th Dec 1930 | Box 40 \ 5 Scan204 | |
| Complaints of starter motor slipping on the 25 HP model and the proposed fix of fitting a stronger spring. | 9th Dec 1930 | Box 40 \ 5 Scan205 | |
| Request to fit a new friction clutch spring to a 20/25 HP starter motor. | 11th Dec 1930 | Box 40 \ 5 Scan206 | |
| Extract from a report on chassis 18-GIV at 6,000 miles regarding a starter motor issue. | 18th Dec 1930 | Box 40 \ 5 Scan207 | |
| Test results for a 20/25 starter motor drive fitted with a stronger spring to prevent slipping. | 22th Jan 1931 | Box 40 \ 5 Scan208 | |
| Extract from a 10,000-mile report on vehicle 18-GIV concerning the starter motor. | 30th Jan 1931 | Box 40 \ 5 Scan209 | |
| Starter motor for Chassis GLR.59, noting a spring issue and its subsequent return. | 9th Feb 1931 | Box 40 \ 5 Scan210 | |
| Starter motor and drive options for the 'Japan 3' model, comparing different systems and gear ratios. | 3rd Mar 1931 | Box 40 \ 5 Scan211 | |
| The unsuitability of a foot-operated starter and the evaluation of alternative starter systems. | 3rd Mar 1931 | Box 40 \ 5 Scan212 | |
| Specification for testing and inspecting the 20/25 starter motor Bijur Bendix drive. | 17th Mar 1931 | Box 40 \ 5 Scan213 | |
| Instructing the works to make four units of an Exhaust Port Connection based on an enclosed blueprint for contract experiments. | 21th Nov 1921 | Box 40 \ 6 Scan001 | |
| Blueprints for 'Condor' engine twin induction pipes, intended to be coupled with an 'Eagle' carburetter. | 12th Dec 1921 | Box 40 \ 6 Scan002 | |
| Blueprints for an experimental induction pipe for the Series 1 'Condor' engine. | 4th Apr 1922 | Box 40 \ 6 Scan003 | |
| Petrol consumption data for a Condor engine, detailing performance with induction pipes type 1.A. and a throttle curve. | 9th Sep 1922 | Box 40 \ 6 Scan004 | |
| Report investigating the potential causes of burning exhaust valves on the Condor engine. | 9th Sep 1922 | Box 40 \ 6 Scan005 | |
| Troubles and proposed modifications for the Condor Series 111 carburetter and induction pipe fixing. | 28th Mar 1924 | Box 40 \ 6 Scan006 | |
| The fitting of special planet pinion bearings to an 'Eagle' Epicyclic Gear from Handley Page. | 1st Oct 1921 | Box 40 \ 6 Scan007 | |
| Requesting an attachment for a tensile test machine be made from blueprints for gear tooth tests. | 1st Dec 1921 | Box 40 \ 6 Scan008 | |
| Request for a blueprint and parts for a rig to test gear wheel teeth on the 'Eagle' engine. | 23th Dec 1921 | Box 40 \ 6 Scan009 | |
| The 'Goshawk' II Bendix Drive, detailing associated drawings and sourcing for a specific ball bearing. | 1st Jul 1921 | Box 40 \ 6 Scan010 | |
| The design and required drawings for the 'Goshawk' II starter motor Bendix drive. | 16th Sep 1921 | Box 40 \ 6 Scan011 | |
| Issues with induction roar and testing of a Bendix Pinion starter motor on a Goshawk 11 engine. | 14th Oct 1921 | Box 40 \ 6 Scan012 | |
| Difficulties with a Lucas Starter Motor's Bendix Pinion not disengaging on a Goshawk 11 engine. | 10th Oct 1921 | Box 40 \ 6 Scan013 | |
| Issues with the Bendix Pinion for the Goshawk 11 engine, specifically thread angle and gear noise. | 8th Oct 1921 | Box 40 \ 6 Scan014 | |
| Superiority of American workmanship in cutting quiet gears compared to English methods. | 18th Oct 1921 | Box 40 \ 6 Scan015 | |
| The thread specification for a Bendix Pinion. | 27th Oct 1921 | Box 40 \ 6 Scan016 | |
| Design of the Bendix Pinion, comparing it with the version fitted to the Marmon Car. | 28th Oct 1921 | Box 40 \ 6 Scan017 | |
| Design issues and modifications for a Bendix pinion. | 5th Dec 1921 | Box 40 \ 6 Scan018 | |
| Responding to a telegram about a Bijur Bendix model for the Goshawk 11 Bendix Drive. | 1st Jan 1921 | Box 40 \ 6 Scan019 | |
| Bendix Drive, noting its tendency to spoil flywheel teeth and preferring the Bijur modification. | 22th Dec 1921 | Box 40 \ 6 Scan020 | |
| Short memo regarding a missing C. A. V. Bendix Pinion specimen. | 22th Dec 1921 | Box 40 \ 6 Scan021 | |
| Modifications for the Goshawk II Bendix starter gear, referencing drawing No. LeC.1507. | 31th Dec 1921 | Box 40 \ 6 Scan022 | |
| Parts required for a 'Goshawk' 11 Bendix Drive for a starter motor, with modification instructions. | 1st Jan 1922 | Box 40 \ 6 Scan023 | |
| Drawing No. LeC.152C showing an improved Bendix plunger scheme for the Goshawk II. | 21th Jan 1922 | Box 40 \ 6 Scan024 | |
| Engine starting difficulties in cold weather, potential failures related to the gearbox, and design alterations. | 2nd Feb 1922 | Box 40 \ 6 Scan025 | |
| Analysis of engine starting issues related to clutch, battery, and gear drive systems. | 2nd Feb 1922 | Box 40 \ 6 Scan026 | |
| Discussion of engine characteristics, starting issues, starter motor failures, and a post-war 3-speed gearbox design. | 2nd Feb 1922 | Box 40 \ 6 Scan027 | |
| List of recommendations for addressing engine starting issues, focusing on lubrication, battery condition, and starter motor operation. | 16th Dec 1921 | Box 40 \ 6 Scan028 | |
| Methods for reliable engine starting, focusing on priming and starting carburettor design. | 16th Dec 1921 | Box 40 \ 6 Scan029 | |
| Jamming issues with the Bendix Pinion and proposing solutions. | 15th Mar 1922 | Box 40 \ 6 Scan030 | |
| Continued note discussing the timing of teeth and threads within working limits. | 25th Apr 1922 | Box 40 \ 6 Scan031 | |
| Requesting feedback on solutions for a sticking Bendix drive pinion on the Goshawk 11 engine for potential use in the Peregrine. | 25th Apr 1922 | Box 40 \ 6 Scan032 | |
| Strongly worded letter advising against the use of the Bendix Drive, detailing its unreliability and potential damage. | 23th May 1922 | Box 40 \ 6 Scan033 | |
| Comparing two notable alternative starter motor pinion designs and their performance. | 23th May 1922 | Box 40 \ 6 Scan034 | |
| Comparison of different starter motor engagement systems, including manual and automatic types. | 9th Jun 1922 | Box 40 \ 6 Scan035 | |
| Inquiry regarding the status of solutions for a sticking issue with the Goshawk Bendix. | 9th Jun 1922 | Box 40 \ 6 Scan036 | |
| Testing and performance of Bendix drives on Goshawk engines, noting issues with flywheel teeth damage. | 12th Jun 1922 | Box 40 \ 6 Scan037 | |
| Advocating for the use of Bendix drive starters over an existing system on a 40/50 chassis. | 12th Jun 1922 | Box 40 \ 6 Scan038 | |
| Changeover of the Goshawk II Bendix Drive from part D.50608 to D.50725. | 26th Jul 1932 | Box 40 \ 6 Scan039 | |
| Failures of springs and seizure issues on Goshawk Bendix starter motor drives. | 26th Jul 1922 | Box 40 \ 6 Scan040 | |
| Technical feedback on Bendix, water pump, and battery ignition systems following a visit. | 22th Aug 1922 | Box 40 \ 6 Scan041 | |
| Design changes for a Goshawk 11 Bendix Pinion, as requested by Mr. Royce. | 25th Aug 1922 | Box 40 \ 6 Scan042 | |
| Instructing Stores to despatch one Bendix Drive at no charge. | 27th Sep 1922 | Box 40 \ 6 Scan043 | |
| Sending drawing No. LeC.1640 for the Goshawk II Bijur starter motor pinion and requesting instructions for test pieces. | 7th Oct 1922 | Box 40 \ 6 Scan044 | |
| Disappointment with a rough starter on the Goshawk and a proposed solution. | 18th Oct 1922 | Box 40 \ 6 Scan045 | |
| Confirming the return of a Bendix drive. | 19th Oct 1922 | Box 40 \ 6 Scan046 | |
| Suggestion to minimize work on the Starter Motors and Bendix Drives for Goshawk cars due to dissatisfaction and expected improvements. | 11th Nov 1922 | Box 40 \ 6 Scan047 | |
| Alteration of a starter motor from a Bendix to a Bijur type pinion for the Goshawk project. | 1st Dec 1922 | Box 40 \ 6 Scan048 | |
| Material specifications for the Goshawk starter motor gear. | 7th Dec 1922 | Box 40 \ 6 Scan049 | |
| Testing the Bijur Starter Drive, detailing the cause of failures and comparing performance. | 2nd Feb 1923 | Box 40 \ 6 Scan050 | |
| Comparison between Bijur and Bendix starter drives, noting the future transfer of the 'Seagull' scheme to the 'Goshawk' engine. | 1st Jan 1931 | Box 40 \ 6 Scan051 | |
| Recurring failures of the Bendix drive on starter motors for 20-HP engines. | 19th Apr 1923 | Box 40 \ 6 Scan052 | |
| Specification amendment for testing the 20 HP starter motor Bendix friction drive scheme. | 30th May 1923 | Box 40 \ 6 Scan053 | |
| Covering memorandum for the specification of test and inspection for a 20 HP starter motor bendix drive. | 30th May 1923 | Box 40 \ 6 Scan054 | |
| Specification for the test and inspection of the 20 HP starter motor Bendix and friction drive scheme. | 30th May 1923 | Box 40 \ 6 Scan055 | |
| Recommending the replacement of Bendix starter motor pinions with Bijur on 20 HP demonstration cars. | 16th Jul 1923 | Box 40 \ 6 Scan056 | |
| The complete failure of a starter motor Bendix gear drive for a 20-HP chassis. | 17th Jul 1923 | Box 40 \ 6 Scan057 | |
| Customer complaint and investigation into an old-type Bendix gear failure on a 20-HP car. | 25th Jul 1923 | Box 40 \ 6 Scan058 | |
| Customer complaint regarding a starter motor failure and reimbursing transport costs. | 31th Jul 1923 | Box 40 \ 6 Scan059 | |
| Query regarding a recurring failure with the starter motor. | 28th Aug 1923 | Box 40 \ 6 Scan060 | |
| Potential improvements and tests for the Goshawk Bendix drive mechanism. | 28th Aug 1923 | Box 40 \ 6 Scan061 | |
| Testing and potential improvement of a Bendix component compared to a Bijur system. | 13th Aug 1923 | Box 40 \ 6 Scan062 | |
| Failure of a Bendix Starter Pinion on chassis 44-G-2 and the subsequent use of an improved Bijur Starter Pinion. | 13th Aug 1923 | Box 40 \ 6 Scan063 | |
| Changing the Bendix Pinion to a Bijur Drive on 20 HP demonstration cars. | 30th Aug 1923 | Box 40 \ 6 Scan064 | |
| Internal memorandum regarding a faulty Bendix starter motor from car 46-G-9. | 5th Sep 1923 | Box 40 \ 6 Scan065 | |
| The Goshawk Bendix Drive, detailing a test on a trials car and comparing its performance to the Bijur type. | 1st Sep 1923 | Box 40 \ 6 Scan066 | |
| Tests comparing the creep of a Bijur clutch with a cork washer clutch under various conditions. | 12th Jul 1923 | Box 40 \ 6 Scan067 | |
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