| Description | Date | Identifier | |
| Standardisation sheets for a pilot jet and fan blade reinforcing plate, and travel plans for testing. | 20th Dec 1921 | Box 74 \ 2 scan0060 | |
| Design of an exhaust-heated throttle and pilot jet, and a magneto control for a Goshawk 11 engine. | 29th Dec 1921 | Box 74 \ 2 scan0061 | |
| Continued memorandum regarding magneto settings and the location of a Bendix Pinion. | 29th Dec 1921 | Box 74 \ 2 scan0062 | |
| Standardisation Sheets No. 3438 for strengthening a Fan Blade and No. 4387 for a new experimental Pilot Jet design. | 19th Jan 1922 | Box 74 \ 2 scan0063 | |
| Directive to calculate the value of stock parts to be scrapped upon the introduction of a new design. | 10th Jan 1922 | Box 74 \ 2 scan0064 | |
| Exhausted heated throttle, pilot jet, and instrument board controls for the 40/50 chassis. | 10th Jan 1922 | Box 74 \ 2 scan0065 | |
| The requirement for Standardisation Sheet No. 4387. | 10th Jan 1922 | Box 74 \ 2 scan0066 | |
| Letter discussing the design and operation of a pilot jet for starting the car, particularly in cold conditions. | 4th Jul 1922 | Box 74 \ 2 scan0067 | |
| Butterfly valve noise and recommendations regarding the exhaust-heated throttle. | 4th Jul 1922 | Box 74 \ 2 scan0068 | |
| The replacement of primers with a pilot jet. | 2nd Feb 1922 | Box 74 \ 2 scan0069 | |
| Requesting feedback on shock absorbers, carburetter, and axle performance, with updates on car deliveries. | 2nd Feb 1922 | Box 74 \ 2 scan0070 | |
| Instructions for trialing a new induction pipe and heated throttle arrangement to improve engine performance on poor quality fuel. | 26th Jun 1922 | Box 74 \ 2 scan0071 | |
| The standardisation of a Pilot Jet to replace the Primer, noting successful trials. | 26th Jun 1922 | Box 74 \ 2 scan0072 | |
| Requesting costs for an experiment to replace a primer with a pilot jet. | 26th Jun 1922 | Box 74 \ 2 scan0073 | |
| Standardisation and replacement of a primer with a pilot jet, including official comments and conference minutes. | 1st Aug 1922 | Box 74 \ 2 scan0074 | |
| Implementation of a new Pilot Jet design versus using up existing stock of primers. | 11th Aug 1922 | Box 74 \ 2 scan0075 | |
| Decision to replace the primer with a pilot jet for improved starting. | 11th Aug 1922 | Box 74 \ 2 scan0076 | |
| The standardisation of a new Pilot Jet, considering existing stock levels, customer complaints, and engine problems. | 1st Aug 1922 | Box 74 \ 2 scan0077 | |
| Completed standardisation sheet for replacing a primer with a pilot jet. | 1st Aug 1922 | Box 74 \ 2 scan0078 | |
| Cost valuation of priming device parts in stock that are to be superseded by a Pilot Jet. | 7th Jul 1922 | Box 74 \ 2 scan0079 | |
| Standardisation of a chassis part, proposing a pilot jet to replace the primer for improved engine starting. | 26th Jun 1922 | Box 74 \ 2 scan0080 | |
| Experiment to replace the primer with a pilot jet, seeking feedback on an attached standardisation sheet. | 1st Jun 1922 | Box 74 \ 2 scan0081 | |
| From CJ to Hs regarding consent to replace a primer with a pilot jet. | 10th Aug 1922 | Box 74 \ 2 scan0082 | |
| Standardisation sheet for replacing a primer with a pilot jet. | 8th Aug 1922 | Box 74 \ 2 scan0083 | |
| Cost breakdown of Priming Device Parts in stock which are to be superseded by the Pilot Jet. | 7th Jul 1922 | Box 74 \ 2 scan0084 | |
| Standardisation of chassis parts to replace the primer with a pilot jet to improve engine starting. | 26th Jun 1922 | Box 74 \ 2 scan0085 | |
| The successful replacement of a primer with a pilot jet to solve engine starting issues. | 26th Jun 1922 | Box 74 \ 2 scan0086 | |
| Standardisation sheet confirming the adoption of a Pilot Jet to replace a primer. | 8th Aug 1922 | Box 74 \ 2 scan0087 | |
| Confirming the decision to adopt the Pilot Jet to replace the Primer. | 11th Aug 1922 | Box 74 \ 2 scan0088 | |
| Cable to Springfield, USA, regarding the winter suitability of a pilot jet and vaporizing scheme. | 11th Oct 1921 | Box 74 \ 2 scan0089 | |
| The total mileage of a metal battery box on chassis 6-GII. | 8th Jul 1925 | Box 74 \ 2 scan0090 | |
| Letter from Maurice Olley discussing the prevention of cold-knocking and cylinder wear by coupling extra oil to the pilot jet. | 16th Oct 1925 | Box 74 \ 2 scan0091 | |
| Letter discussing the extra oil system for the starter carburetter and cylinder bores on various engine models. | 26th Oct 1925 | Box 74 \ 2 scan0092 | |
| Letter from the American office to the UK office acknowledging correspondence about extra oil coupled to a pilot jet. | 9th Nov 1925 | Box 74 \ 2 scan0093 | |
| Meeting minutes discussing issues with woven covering for cone clutches. | 17th Jan 1911 | Box 74 \ 2 scan0094 | |
| Continuation page of a report on Cone Clutches, instructing Mr Platford to proceed with experiments. | 24th Feb 1910 | Box 74 \ 2 scan0095 | |
| Test report on Scandinavian belting used for a clutch. | 3rd Oct 1911 | Box 74 \ 2 scan0096 | |
| Experimental clutch with cotton belting. | 7th Nov 1911 | Box 74 \ 2 scan0097 | |
| Notes on a shaft received from Mr. Royce, its superiority to leather, and fitting to various chassis. | 10th Mar 1912 | Box 74 \ 2 scan0098 | |
| Meeting note discussing the fitting of cotton belting to clutch cones for testing. | 18th Dec 1911 | Box 74 \ 2 scan0099 | |
| Cotton cone clutch, including a note from Mr Royce asking about its progress and competitor materials. | 6th Sep 1912 | Box 74 \ 2 scan0100 | |
| To the Technical Committee discussing alternative materials and designs for clutches. | 6th Feb 1912 | Box 74 \ 2 scan0101 | |
| Typed memo with hand-drawn diagrams illustrating methods for securing tape to an aluminium cone using rivets and clips. | 6th Feb 1912 | Box 74 \ 2 scan0102 | |
| Note from Mr. Royce regarding the design and materials for a cone clutch. | 6th Feb 1912 | Box 74 \ 2 scan0103 | |
| Experimental results of clutches fitted with untreated and treated cotton fabric. | 21th Feb 1912 | Box 74 \ 2 scan0104 | |
| On clutch development, suggesting a trial of Renault spring tongues and noting progress with woven fabric clutches. | 2nd Jan 1914 | Box 74 \ 2 scan0105 | |
| Summary of notes from Mr. Royce regarding the testing and standardization of cotton cone clutches. | 10th Mar 1912 | Box 74 \ 2 scan0106 | |
| Departmental memo discussing the proposal to make cotton fabric cone clutches standard practice. | 13th Mar 1912 | Box 74 \ 2 scan0107 | |
| Departmental memo agreeing with a proposal regarding cotton fabric cone clutches, pending a report. | 13th Mar 1912 | Box 74 \ 2 scan0108 | |
| Requesting experiments to prove the superiority of cotton cone clutches over leather ones. | 16th Mar 1912 | Box 74 \ 2 scan0109 | |
| Departmental memo regarding the manufacture and testing of twelve cotton fabric cone clutches. | 22th Mar 1912 | Box 74 \ 2 scan0110 | |
| Report card detailing updates on a cotton fabric clutch with separate segments. | 21th Mar 1912 | Box 74 \ 2 scan0111 | |
| Test report comparing leather and bottom belting materials for clutches on a dynamometer. | 28th Mar 1912 | Box 74 \ 2 scan0112 | |
| The condition of clutch and belting after dismantling, and engine torque test results. | 2nd Jan 1912 | Box 74 \ 2 scan0113 | |
| Comparative tests on a standard leather cone clutch and a cone clutch with cotton belting. | 1st Apr 1912 | Box 74 \ 2 scan0114 | |
| Test report on the performance of a cotton belting clutch under various loads and temperatures. | 1st Apr 1912 | Box 74 \ 2 scan0115 | |
| Committee decision to make the cotton belting clutch a standard part. | 12th Apr 1912 | Box 74 \ 2 scan0116 | |
| Requesting the numbers of available London Trials Cars for fitting with cotton belting cone clutches. | 12th Apr 1912 | Box 74 \ 2 scan0117 | |
| Implementation of a new cotton fabric clutch to replace the existing leather version. | 13th Apr 1912 | Box 74 \ 2 scan0118 | |
| Note on the types of clutches fitted to various experimental cars. | 15th Apr 1912 | Box 74 \ 2 scan0119 | |
| From F.H. Royce requesting a comparison between a cotton fabric lined clutch and a leather lined clutch, focusing on performance issues like jaggering and shrieking. | 15th Apr 1912 | Box 74 \ 2 scan0120 | |
| Outline of the development and testing progress of a cotton fabric cone clutch. | 15th Apr 1912 | Box 74 \ 2 scan0121 | |
| The testing and development of different clutch cone samples, leading to a standardized design. | 15th Apr 1912 | Box 74 \ 2 scan0122 | |
| Progress report on an experimental clutch, noting delays due to other experiments. | 25th Nov 1911 | Box 74 \ 2 scan0123 | |
| Log detailing instructions, tests, and progress for clutch segments. | 25th Nov 1911 | Box 74 \ 2 scan0124 | |
| Page of miscellaneous log entries and a small sketch. | 16th Apr 1912 | Box 74 \ 2 scan0125 | |
| Departmental memo regarding fitting a new type of clutch to Trials car No. 1735. | 16th Apr 1912 | Box 74 \ 2 scan0126 | |
| The fitting of Cotton Belting Cone Clutches to London trials and experimental cars. | 18th Apr 1912 | Box 74 \ 2 scan0127 | |
| Test report and data for a cotton belting clutch. | 19th Apr 1912 | Box 74 \ 2 scan0128 | |
| Report log detailing component tests, inspections, and correspondence. | 16th May 1912 | Box 74 \ 2 scan0129 | |
| Record of a Clutch Cone being supplied to the Test Department on two separate occasions. | 19th Apr 1912 | Box 74 \ 2 scan0130 | |
| Departmental memo detailing Mr. Royce's notes on tape-wound and cotton fabric cone clutches. | 22th Apr 1912 | Box 74 \ 2 scan0131 | |
| Tests of a Cotton Fabric Cone Clutch, investigating a 'jaggering' issue with different fabric thicknesses. | 3rd May 1912 | Box 74 \ 2 scan0132 | |
| Page 2 of a document describing the recessing of tube rivet heads. | 3rd May 1912 | Box 74 \ 2 scan0133 | |
| Job card detailing the supply of cotton fabric clutches to the Test Department. | 3rd May 1912 | Box 74 \ 2 scan0134 | |
| 3/16 inch cotton fabric clutch test. | 3rd May 1912 | Box 74 \ 2 scan0135 | |
| Indicating a further report. | 4th May 1912 | Box 74 \ 2 scan0136 | |
| The testing of a three-sixteenth cotton fabric clutch material. | 4th May 1912 | Box 74 \ 2 scan0137 | |
| Typed note regarding a clutch test, stating a further report will follow. | 11th May 1912 | Box 74 \ 2 scan0138 | |
| Departmental memo comparing the performance of the cotton fabric clutch against the plate clutch. | 11th May 1912 | Box 74 \ 2 scan0139 | |
| Departmental memo discussing a plate clutch issue, including a 'jaggering' effect and observations on groove wear. | 18th Mar 1912 | Box 74 \ 2 scan0140 | |
| Further report on dynamometer tests for a three-sixteenth cotton fabric clutch. | 15th May 1912 | Box 74 \ 2 scan0141 | |
| On cotton belting cone clutches, detailing a change in material thickness and tests to prevent edge fraying. | 20th May 1912 | Box 74 \ 2 scan0142 | |
| Record card detailing the fitting of a cotton fabric cover to Clutch Cone C133 for Chassis 1200. | 21th May 1912 | Box 74 \ 2 scan0143 | |
| Issues with a cotton belting clutch on car 1200, requesting a new one fitted with extra rivets. | 24th May 1912 | Box 74 \ 2 scan0144 | |
| Instructions for the supply and manufacture of Clutch Cone G1791 to the Test Department. | 4th Jun 1912 | Box 74 \ 2 scan0145 | |
| Test report for a 3/16' cotton fabric clutch with shellac washed off, wired edges and seams. | 20th Sep 1912 | Box 74 \ 2 scan0146 | |
| Test report on a cotton belting clutch of 3/16' thickness. | 20th Sep 1912 | Box 74 \ 2 scan0147 | |
| 1/4' cotton fabric clutch with shellaced, wired edges and seams. | 2nd Jan 1912 | Box 74 \ 2 scan0148 | |
| Record card detailing the supply and status of Clutch Cone G1860 to the Test Department. | 1st Jul 1912 | Box 74 \ 2 scan0149 | |
| Letter from F.H. Royce to Claude Johnson concerning the attachment of cotton fabric to aluminium clutch cones. | 6th Jul 1912 | Box 74 \ 2 scan0150 | |
| Letter discussing proposed changes to a clutch & fly-wheel design, including materials and dimensions. | 13th Jul 1912 | Box 74 \ 2 scan0151 | |
| Page 2 of a document for Claude Johnson with typed text and handwritten notes regarding a clutch mechanism. | 27th Jul 1912 | Box 74 \ 2 scan0152 | |
| From Mr Royce regarding experiments on cotton fabric clutches using staples. | 27th Jul 1912 | Box 74 \ 2 scan0153 | |
| Clarifying a misunderstanding regarding the attachment method for cone clutch fabric, which caused a delay. | 22th Aug 1912 | Box 74 \ 2 scan0154 | |
| Instruction to supply three Clutch Cones to the Test Department with related drawing numbers. | 24th Aug 1912 | Box 74 \ 2 scan0155 | |
| Record concerning the supply and specifications for clutch cones for the Test Department. | 26th Aug 1912 | Box 74 \ 2 scan0156 | |
| Test report on the performance of a cotton fabric clutch after being run through flood water. | 28th Aug 1912 | Box 74 \ 2 scan0157 | |
| To Mr. Royce regarding the testing and fitting of a new cone clutch with stapled fabric. | 30th Aug 1912 | Box 74 \ 2 scan0158 | |
| Issues and modifications regarding cotton fabric cone clutches, including riveting and stitching. | 9th Jul 1912 | Box 74 \ 2 scan0159 | |
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