| Description | Date | Identifier | |
| Design and testing of an improved Bendix drive for the Goshawk II engine. | 11th Sep 1923 | Box 40 \ 6 Scan068 | |
| Completing details for the Bendix Drive, enclosing a blueprint for the Engaging Spring. | 1st Nov 1923 | Box 40 \ 6 Scan069 | |
| Issuance of blueprints for Bendix Drives. | 14th Nov 1923 | Box 40 \ 6 Scan070 | |
| Difficulty of lubricating the 20-HP starter Bendix gear and suggesting an easier scheme. | 11th Apr 1924 | Box 40 \ 6 Scan071 | |
| Noisy starter on Mr. Royce's car and a request for an update on suggested improvements. | 30th May 1924 | Box 40 \ 6 Scan072 | |
| Ongoing failure of Bendix Drives for 20-HP starter motors, listing returned units. | 18th Jun 1924 | Box 40 \ 6 Scan073 | |
| Reporting a faulty starter and an uncomfortable driver's seat on a 5-Goshawk-11 car. | 20th Jun 1924 | Box 40 \ 6 Scan074 | |
| Broken starter motor on car 5-G-11 and the dispatch of a replacement. | 21th Jun 1924 | Box 40 \ 6 Scan075 | |
| Removal and replacement of a faulty starter motor on a 5-Goshawk-11 car. | 24th Jun 1924 | Box 40 \ 6 Scan076 | |
| From RS to HS regarding the dispatch of a damaged starter motor and bendix and arranging a replacement. | 25th Jun 1924 | Box 40 \ 6 Scan077 | |
| Sending a starter motor with a Bijur drive to replace the original Bendix drive. | 25th Jun 1924 | Box 40 \ 6 Scan078 | |
| Confirmation of a wire urgently requesting a new starter motor with bendix for a car named 'Five Goshawk'. | 25th Jun 1924 | Box 40 \ 6 Scan079 | |
| Urgent telegram from Royce requesting a new starter motor with Bendix for a '5 goshawk' car. | 25th Jun 1924 | Box 40 \ 6 Scan080 | |
| Instructing the despatch of one starter motor to St. Pancras Station for collection. | 26th Jun 1924 | Box 40 \ 6 Scan081 | |
| Improvements and standardisation of Bendix and Bijur components for Goshawks engines. | 30th Jun 1924 | Box 40 \ 6 Scan082 | |
| Redesign and improvement of Bendix and Bijur pinions from the original defective American designs. | 1st Jul 1924 | Box 40 \ 6 Scan083 | |
| Inconsistent performance of the 20 HP starter pinion. | 29th Nov 1924 | Box 40 \ 6 Scan084 | |
| Performance and replacement of starter motor pinions for Goshawk cars. | 3rd Dec 1924 | Box 40 \ 6 Scan085 | |
| The Goshawk project and the replacement of Bendix drives with the improved Bijur scheme. | 11th Dec 1924 | Box 40 \ 6 Scan086 | |
| Faulty starter motor for Chassis 10-GIII after completing 10,027 miles. | 4th May 1926 | Box 40 \ 6 Scan087 | |
| Request for complete details of the Imco Autopulse Magnetic Fuel Pump. | 20th Aug 1925 | Box 41 \ 1 Scan001 | |
| Letter from Ireland & Matthews Manufacturing Co. regarding their 'Autopulse' magnetic fuel pump. | 31th Aug 1925 | Box 41 \ 1 Scan002 | |
| Informational leaflet detailing twelve reasons for adopting the AUTOPULSE fuel pump, with a list of boat and engine builders who use it. | 23th Sep 1925 | Box 41 \ 1 Scan003 | |
| From EFC to Hs. suggesting a test for the Autopulse. | 23th Sep 1925 | Box 41 \ 1 Scan004 | |
| Cover page for the Autopulse System, a fuel supply solution. | 23th Sep 1925 | Box 41 \ 1 Scan005 | |
| Descriptive booklet for the Autopulse Magnetic Fuel Pump, detailing its features, installation, and operation. | 23th Sep 1925 | Box 41 \ 1 Scan006 | |
| Installation instructions and operational details for the AUTOPULSE fuel pump unit. | 23th Sep 1925 | Box 41 \ 1 Scan007 | |
| Installation, operation tests, service, and capacity information for the Autopulse electric fuel pump. | 23th Sep 1925 | Box 41 \ 1 Scan008 | |
| Detailed explanation of the AUTOPULSE fuel pump, its operation, and specifications. | 23th Sep 1925 | Box 41 \ 1 Scan009 | |
| Descriptive document on the operation, installation, and application of the Autopulse electric fuel pump. | 23th Sep 1925 | Box 41 \ 1 Scan010 | |
| Advertisement leaflet detailing twelve reasons why the Autopulse system solves gas engine fuel supply issues. | 13th Mar 1928 | Box 41 \ 1 Scan011 | |
| From Mr. Olley to Mr. Nadin regarding the ordering of two Autopulse instruments. | 13th Mar 1928 | Box 41 \ 1 Scan012 | |
| The requirement for a test rig for petrol pumps on aero engines. | 18th Mar 1926 | Box 41 \ 1 Scan013 | |
| Technical memo describing the function of an Auto-Pulse electro-magnetic petrol pump. | 13th Jul 1926 | Box 41 \ 1 Scan014 | |
| Laboratory tests of a petrol delivery instrument, detailing its performance and suitability for use in a car. | 13th Jul 1926 | Box 41 \ 1 Scan015 | |
| Continuation page of a note regarding an objection to work on a car. | 13th Jul 1926 | Box 41 \ 1 Scan016 | |
| Performance graph of an 'Autopulse' electric petrol pump showing delivery rate versus head at various operating voltages and suction heads. | 12th Aug 1926 | Box 41 \ 1 Scan017 | |
| Rear of a document with a Print Room stamp from the Derby facility. | 13th Jul 1928 | Box 41 \ 1 Scan018 | |
| Letter from the American branch to Derby discussing the Autopulse Fuel Pump's performance and installation. | 28th Jul 1926 | Box 41 \ 1 Scan019 | |
| Page 2 of a letter discussing the uses of a device and recommending more thorough testing. | 28th Jul 1926 | Box 41 \ 1 Scan020 | |
| Test report on the 'IMCO' Autopulse fuel pump's performance on chassis 9-EX. | 13th Sep 1926 | Box 41 \ 1 Scan021 | |
| The operational issues of an Autopulse unit, detailing its inconsistent performance and noise levels. | 18th Nov 1926 | Box 41 \ 1 Scan022 | |
| Request for views on the 'AUTO-PULSE' fuel system, quoting a discussion at a Works Conference. | 18th Nov 1926 | Box 41 \ 1 Scan023 | |
| Cover note attaching a report detailing objections to the Autopulse Fuel Pump. | 22th Nov 1926 | Box 41 \ 1 Scan024 | |
| The testing and performance issues of an 'IMCO' Autopulse fuel pump fitted to chassis 9-EX. | 13th Sep 1926 | Box 41 \ 1 Scan025 | |
| Letter from Rolls-Royce of America discussing test results and issues with the Imco Autopulse fuel pump. | 13th Nov 1926 | Box 41 \ 1 Scan026 | |
| Page two of a letter discussing the troublesome nature of the Phantom float feed system and requesting tips for its operation. | 13th Nov 1926 | Box 41 \ 1 Scan027 | |
| Letter from R.M. Papélian Limited promoting their 'Autopulse' petrol system and seeking to arrange a demonstration. | 30th Nov 1926 | Box 41 \ 1 Scan028 | |
| Bulletin for the Autopulse Magnetic Fuel Pump, approved by the National Board of Fire Underwriters. | 30th Nov 1926 | Box 41 \ 1 Scan029 | |
| Promotional document and summary of subjects for the 'Autopulse' gasoline delivery system. | 30th Nov 1926 | Box 41 \ 1 Scan030 | |
| Product information sheet for the Autopulse Magnetic Fuel Pump, detailing its operation and features. | 30th Nov 1926 | Box 41 \ 1 Scan031 | |
| Installation instructions and features for the Autopulse fuel system. | 30th Nov 1926 | Box 41 \ 1 Scan032 | |
| Installation, operation, and service instructions for the Autopulse electric fuel pump. | 30th Nov 1926 | Box 41 \ 1 Scan033 | |
| Technical bulletin detailing the specifications and performance of the 'AUTOPULSE' fuel pump system. | 30th Nov 1926 | Box 41 \ 1 Scan034 | |
| Technical explanation, operating principles, and ordering instructions for the AUTOPULSE electric fuel pump. | 30th Nov 1926 | Box 41 \ 1 Scan035 | |
| Technical and marketing document for the Autopulse fuel sediment trap and system. | 30th Nov 1926 | Box 41 \ 1 Scan036 | |
| Promotional leaflet for the Autopulse Gas Engine Fuel Supply from Ireland & Matthews Manufacturing Company. | 1st Dec 1926 | Box 41 \ 1 Scan037 | |
| Letter to Messrs. R.M. Papélian Ltd. rejecting the Auto-pulse petrol system following tests. | 1st Dec 1926 | Box 41 \ 1 Scan038 | |
| Letter from a motor parts importer offering a new 'Autopulse' device for testing on an experimental car. | 2nd Dec 1926 | Box 41 \ 1 Scan039 | |
| Letter discussing the performance, issues, and installation of single and double Autopulse fuel feeding devices on various car models. | 13th Dec 1926 | Box 41 \ 1 Scan040 | |
| The piston design for the Eagle XVI engine, referencing drawings and compression ratios. | 1st Oct 1925 | Box 41 \ 1 Scan041 | |
| Overweight sample Eagle 16 piston and proposed methods for weight reduction. | 27th Aug 1923 | Box 41 \ 1 Scan042 | |
| Quality and inspection of French-made 40/50 chassis springs. | 27th Aug 1923 | Box 41 \ 1 Scan043 | |
| Bump testing Lemoines springs and a recommendation for their use. | 6th Dec 1923 | Box 41 \ 1 Scan044 | |
| Bump test report for Lemoines 40-50 chassis springs. | 6th Dec 1923 | Box 41 \ 1 Scan045 | |
| Request to urgently obtain six pairs of spring plates, three from America and three from Lemoines. | 18th Dec 1923 | Box 41 \ 1 Scan046 | |
| Poor manufacturing and potential improvements for front springs on the Phantom and 20 HP models. | 23th Sep 1925 | Box 41 \ 1 Scan047 | |
| Use, testing, and sourcing of Lemoine springs for the 20 HP 'India' chassis. | 26th Sep 1925 | Box 41 \ 1 Scan048 | |
| Testing of Lemoine springs on the 20 HP car. | 26th Sep 1925 | Box 41 \ 1 Scan049 | |
| Internal request to order six pairs of front springs for the 20 HP chassis from Messrs Lemoines. | 28th Sep 1925 | Box 41 \ 1 Scan050 | |
| Modifications Mr. Royce wishes for the 'INDIA' 10,000 miles car. | 10th Oct 1925 | Box 41 \ 1 Scan051 | |
| Confirming the receipt of six sets of 20-HP chassis front springs from Messrs. Lemoine for the Experimental Department. | 23th Nov 1925 | Box 41 \ 1 Scan052 | |
| Receipt and testing of Lemoine manufactured springs from Paris and a related customs duty refund claim. | 26th Nov 1925 | Box 41 \ 1 Scan053 | |
| Particulars of Lemoine Road Springs, comparing two different batches received. | 3rd Dec 1925 | Box 41 \ 1 Scan054 | |
| Design drawing detailing the specifications for front and rear leaf springs for Perkins. | 2nd Dec 1925 | Box 41 \ 1 Scan055 | |
| Blank page with a Print Room stamp. | 2nd Dec 1925 | Box 41 \ 1 Scan056 | |
| Drawing and specification tables for front and rear leaf spring assemblies. | 22th Mar 1929 | Box 41 \ 1 Scan057 | |
| The reverse of a document page showing a handwritten reference number and a print room date stamp. | 12th Dec 1925 | Box 41 \ 1 Scan058 | |
| Particulars of Lemoine springs obtained from tests on the 20 HP model. | 1st Mar 1926 | Box 41 \ 1 Scan059 | |
| Different front spring and shock damper schemes, including Woodheads and Lemoine. | 30th Mar 1926 | Box 41 \ 1 Scan060 | |
| Receipt and examination of 12 spring bushes from Lemoine, Paris. | 7th Mar 1927 | Box 41 \ 1 Scan061 | |
| Mislaid Lemoine spring bushes from Paris and the arrangement for a replacement supply. | 3rd May 1927 | Box 41 \ 1 Scan062 | |
| Design and testing of a new riveted spring clip to replace existing options. | 5th Jun 1927 | Box 41 \ 1 Scan063 | |
| The inability to trace specific road spring bushes. | 6th May 1927 | Box 41 \ 1 Scan064 | |
| Commenting on various aspects of road spring design and manufacturing, including rusting, grinding, and plate construction. | 14th Aug 1928 | Box 41 \ 1 Scan065 | |
| Continued memorandum discussing the quality and cost of Firth springs compared to Lemoine springs. | 30th Dec 1919 | Box 41 \ 1 Scan066 | |
| Sending two blueprints for an experimental Hawk Engine Piston set. | 30th Dec 1919 | Box 41 \ 1 Scan067 | |
| Responding to an enquiry for a Gudgeon Pin Locking Screw and Piston Ring Stop for a Hawk Northcliffe Chassis. | 1st Jan 1920 | Box 41 \ 1 Scan068 | |
| Alterations to the Hawk Northcliffe Chassis for the piston and gudgeon pin. | 2nd Feb 1920 | Box 41 \ 1 Scan069 | |
| Causes of burnt valves, pre-ignition issues, and engine vibrations. | 29th Dec 1922 | Box 41 \ 1 Scan070 | |
| Practice of pinning piston rings and comparing it with the 40/50 and Hawk engines. | 1st Jan 1923 | Box 41 \ 1 Scan071 | |
| Technical memorandum comparing the pistons and compression ratio of the 'Hawk-Northcliffe' chassis with the standard 40/50 HP model. | 1st Jan 1923 | Box 41 \ 1 Scan072 | |
| Various piston designs and potential modifications, including the Zephyr split piston. | 22th Dec 1919 | Box 41 \ 1 Scan073 | |
| Typed extract discussing the effectiveness of plunger rings and cast iron pistons. | 22th Dec 1919 | Box 41 \ 1 Scan074 | |
| Development and features of various piston designs for a 10,000-mile test. | 3rd Jan 1920 | Box 41 \ 1 Scan075 | |
| Use of Ricardo's aluminium pistons over returning to cast iron pistons. | 3rd Jan 1920 | Box 41 \ 1 Scan076 | |
| Incorporation of a stop mechanism into an adjustable collapsible piston. | 4th Jan 1920 | Box 41 \ 1 Scan077 | |
| Design specifications and required testing for an adjustable collapsible piston with a hairpin spring. | 5th Jan 1920 | Box 41 \ 1 Scan078 | |
| Valve springs breaking on the 40/50 chassis and a proposal to use a more reliable double spring design from the aero engine. | 24th Nov 1919 | Box 41 \ 1 Scan079 | |
| The recurring, epidemic-like trouble with valve springs on the 40/50 chassis. | 25th Nov 1919 | Box 41 \ 1 Scan080 | |
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