| Description | Date | Identifier | |
| Letter from Autovac Manufacturing Co. Ltd. regarding a faulty Autovac apparatus from an experimental car. | 8th Jan 1932 | Box 40 \ 4 Scan357 | |
| Letter to The Autovac Manufacturing Co. Ltd. regarding a faulty Autovac apparatus sent for investigation. | 11th Jan 1931 | Box 40 \ 4 Scan358 | |
| Letter from Autovac Manufacturing Co. Ltd explaining the cause of failure of a returned Autovac apparatus due to wear on the suction valve. | 14th Jan 1932 | Box 40 \ 4 Scan359 | |
| Blueprint diagram of a float chamber assembly with various valves and connections. | 27th Feb 1933 | Box 40 \ 4 Scan360 | |
| Issues with the Autovac's conical gauze filter causing petrol supply problems and recommending its deletion. | 27th Feb 1933 | Box 40 \ 4 Scan361 | |
| Letter to The Autovac Manufacturing Co. regarding issues with a small conical gauze filter choking up on the autovac system. | 28th Feb 1933 | Box 40 \ 4 Scan362 | |
| Choking of the autovac's conical gauze filter and proposed tests and actions. | 28th Feb 1933 | Box 40 \ 4 Scan363 | |
| Letter from Autovac Manufacturing Co. Ltd. responding to an inquiry about a conical gauze petrol filter. | 1st Mar 1933 | Box 40 \ 4 Scan364 | |
| Choking of the Autovac petrol supply filter and proposing modifications. | 20th Mar 1933 | Box 40 \ 4 Scan365 | |
| Improvements and alternatives for the Autovac petrol supply filter. | 21th Mar 1933 | Box 40 \ 4 Scan366 | |
| The persistent issue of choked Autovac filters on Phantom II and 25-HP chassis. | 12th May 1933 | Box 40 \ 4 Scan367 | |
| The potential standardisation of deleting the autovac filter on Phantom II & 25 HP chassis. | 15th May 1933 | Box 40 \ 4 Scan368 | |
| Autovac tests measuring petrol flow for the Phantom II, Standard Continental Phantom, and a new 8 litre engine. | 18th May 1933 | Box 40 \ 4 Scan369 | |
| Comparison test of engine power output using an Autovac fuel supply versus a test bed supply, noting power loss due to petrol starvation. | 3rd Jul 1933 | Box 40 \ 4 Scan370 | |
| Query regarding the fitment of a larger autovac filter following the deletion of tank-filters on two models. | 3rd Jul 1933 | Box 40 \ 4 Scan371 | |
| Proposal to remove the small conical filter in Autovacs on 20/25 HP and Phantom II cars. | 4th Jul 1933 | Box 40 \ 4 Scan372 | |
| Standardisation of chassis parts concerning the deletion of the filter in the Autovac. | 5th Jul 1933 | Box 40 \ 4 Scan373 | |
| The standardisation of fitting a filter in the Autovac system. | 2nd Aug 1933 | Box 40 \ 4 Scan374 | |
| Dynamometer test report on petrol supply from an autovac to an S.U. carburetter. | 26th Oct 1933 | Box 40 \ 4 Scan375 | |
| Test results showing petrol level loss in an Autovac system at various engine speeds with low fuel. | 26th Oct 1933 | Box 40 \ 4 Scan376 | |
| General notes for Chassis 1 EX, detailing a modification to the magneto's base plate. | 21th Aug 1919 | Box 40 \ 5 Scan001 | |
| Ignition system improvements on the 1 EX experimental car, including spring material and magneto accessibility. | 21th Aug 1919 | Box 40 \ 5 Scan002 | |
| With sketches detailing Mr. Royce's design approval for a 40/50 HP magneto strap. | 8th Oct 1919 | Box 40 \ 5 Scan003 | |
| Adoption of scheme 155 for the magneto base on the 40/50 HP chassis. | 3rd Nov 1919 | Box 40 \ 5 Scan004 | |
| Fitting a Watford Magneto on a sloping base for the 40/50 Chassis to improve accessibility. | 23th Dec 1919 | Box 40 \ 5 Scan005 | |
| Blueprints for parts to fit a Watford Magneto on a 40/50 Chassis. | 2nd Feb 1920 | Box 40 \ 5 Scan006 | |
| Proposal to test the 4.EX experimental chassis at West Wittering, listing its new features. | 27th Feb 1920 | Box 40 \ 5 Scan007 | |
| List of experimental parts fitted to chassis 6.EX. | 22th Jun 1920 | Box 40 \ 5 Scan008 | |
| Extract detailing a list of experimental parts to be fitted to car 6.EX. | 28th Jun 1920 | Box 40 \ 5 Scan009 | |
| Distributing standardisation sheets for a list of experiments. | 12th Oct 1920 | Box 40 \ 5 Scan010 | |
| Cover memo for standardisation sheets detailing various part modifications. | 26th Oct 1920 | Box 40 \ 5 Scan011 | |
| Listing standardisation sheets for several experiments. | 3rd Nov 1920 | Box 40 \ 5 Scan012 | |
| Standardisation of a sloping base for the magneto and a new clip. | 3rd Nov 1920 | Box 40 \ 5 Scan013 | |
| Preparation and modification of an experimental car for testing in the U.S.A. | 4th Nov 1920 | Box 40 \ 5 Scan014 | |
| Design change to the magneto with a sloping base on the 40/50 chassis to simplify production. | 16th Nov 1920 | Box 40 \ 5 Scan015 | |
| Inclined base for a magneto, enclosing copies of other correspondence. | 29th Apr 1921 | Box 40 \ 5 Scan016 | |
| Inclined base for a magneto, to be discussed by the Works Committee. | 30th Apr 1931 | Box 40 \ 5 Scan017 | |
| Letter regarding a design defect on the inclined base for the magneto, suggesting a material change from steel to brass. | 9th Apr 1921 | Box 40 \ 5 Scan018 | |
| The low sparking speeds of an experimental magneto with a sloping base. | 8th May 1921 | Box 40 \ 5 Scan019 | |
| Report investigating a magneto with a sloping base, where the securing strap is short-circuiting the magnetic flux. | 10th May 1921 | Box 40 \ 5 Scan020 | |
| Sample Boyce Moto-Meter received from America for potential testing. | 5th Sep 1919 | Box 40 \ 5 Scan021 | |
| Instructions and sketch detailing temperature readings for a Boyce Motor Meter. | 7th Jul 1918 | Box 40 \ 5 Scan022 | |
| Technical memo evaluating the Boyce Moto-Meter, with test results and a diagram. | 9th Sep 1919 | Box 40 \ 5 Scan023 | |
| Querying the number of Boyce Motor Meter models received from the supplier. | 25th Sep 1919 | Box 40 \ 5 Scan024 | |
| Sample Boyce Moto-Meters and the attached letter from the manufacturer. | 15th Oct 1919 | Box 40 \ 5 Scan025 | |
| Sales letter from The Moto Meter Company, Inc. proposing the adoption of the BOYCE MOTO-METER as equipment. | 26th Oct 1921 | Box 40 \ 5 Scan026 | |
| Quoting a letter from The Benjamin Electric Ltd. regarding their Boyce Moto-Meter temperature gauge. | 26th Oct 1921 | Box 40 \ 5 Scan027 | |
| Letter to The Moto Meter Company declining the use of their 'Boyce' Moto Meters and confirming their return. | 3rd Nov 1919 | Box 40 \ 5 Scan028 | |
| Letter from The Moto Meter Company regarding the supply of motor temperature indicators. | 24th Nov 1919 | Box 40 \ 5 Scan029 | |
| Alteration proposal for the Boyce Motometer from the Springfield factory. | 28th Aug 1923 | Box 40 \ 5 Scan030 | |
| Proposal to use a Boyce distance-type thermometer in place of a Foxboro instrument to save on delays and expense. | 15th Aug 1928 | Box 40 \ 5 Scan031 | |
| Design considerations for producing left-hand steering vehicles, particularly for the American market. | 29th May 1919 | Box 40 \ 5 Scan032 | |
| New chassis for the American factory and the steering position. | 29th May 1919 | Box 40 \ 5 Scan033 | |
| The required modifications for a left-hand drive American model, including changes to the engine and various components. | 27th Sep 1919 | Box 40 \ 5 Scan034 | |
| List of modifications for various vehicle components, page 2. | 27th Sep 1919 | Box 40 \ 5 Scan035 | |
| List of modifications and notes for various vehicle components, including changes for a left/right-hand drive conversion. | 27th Sep 1919 | Box 40 \ 5 Scan036 | |
| Forwarding a cable from America regarding proposed alterations to a chassis. | 12th Dec 1919 | Box 40 \ 5 Scan037 | |
| Design specifications for the American chassis, including left-hand steering and frame length. | 10th Dec 1919 | Box 40 \ 5 Scan038 | |
| Recommendation to switch from right-hand to left-hand steering for cars built in the United States. | 30th Jul 1920 | Box 40 \ 5 Scan039 | |
| With sketches discussing the design of a petrol tank side filler vent pipe, based on points raised by Mr. Royce. | 8th Aug 1920 | Box 40 \ 5 Scan040 | |
| Hand-drawn sketch of a float mechanism with some cursive doodles. | 19th Mar 1920 | Box 40 \ 5 Scan041 | |
| Design specifications for a filler cap handle, strainer, and washer joint, including sketches and comments from Mr. Royce. | 19th Mar 1920 | Box 40 \ 5 Scan042 | |
| Note clarifying the fuel filler position based on the car's steering configuration. | 5th Aug 1920 | Box 40 \ 5 Scan043 | |
| Requesting rapid progress on drawings for a left-hand drive 40/50 chassis. | 3rd Sep 1920 | Box 40 \ 5 Scan044 | |
| Copy of a telegram from Royce with instructions for drawings of a left-hand drive car. | 3rd Sep 1920 | Box 40 \ 5 Scan045 | |
| Design alterations required for a left-hand steering car. | 6th Sep 1920 | Box 40 \ 5 Scan046 | |
| Extract detailing future improvements to electrical components, a new three-speed gearbox, and the introduction of left-hand steering. | 7th Sep 1920 | Box 40 \ 5 Scan047 | |
| Supply of left-hand drive chassis to right-hand drive countries and the potential market reception of central gear levers. | 30th Dec 1920 | Box 40 \ 5 Scan048 | |
| Extract discussing experiments with a new pump design to resolve issues with lubrication and bearing placement. | 28th Apr 1917 | Box 40 \ 5 Scan049 | |
| New scheme for the 'Eagle' water pumps to address issues with worn rotor spindles. | 4th Jun 1919 | Box 40 \ 5 Scan050 | |
| Experimental union connection for the low-pressure oil system and alterations to the carburettor jacket water connection. | 4th Jun 1919 | Box 40 \ 5 Scan051 | |
| Listing drawings being sent for information regarding an 'Eagle' water pump and 20 HP rear axle components. | 5th Jun 1919 | Box 40 \ 5 Scan052 | |
| Print for the Eagle Double Gland Water Pump. | 6th Jun 1919 | Box 40 \ 5 Scan053 | |
| Dispatch of two blueprints for the Eagle Water Pump. | 11th Nov 1919 | Box 40 \ 5 Scan054 | |
| List of parts for an Eagle Water Pump, accompanying two Blue Prints for one experimental set. | 11th Nov 1919 | Box 40 \ 5 Scan055 | |
| Listing goods received from various suppliers for specific experiments. | 3rd Feb 1920 | Box 40 \ 5 Scan056 | |
| Improvements to water pumps for Eagle engines on airships, including a larger pattern and a new lubrication system. | 24th Jun 1920 | Box 40 \ 5 Scan057 | |
| Letter from Bijur Motor Appliance Company describing the construction of an automatic gear engaging device. | 16th Dec 1921 | Box 40 \ 5 Scan058 | |
| Description of the operation of a starter motor's friction clutch and pinion engagement mechanism. | 16th Dec 1921 | Box 40 \ 5 Scan059 | |
| Explanation of the operation of an automatic meshing device, including its engagement, disengagement, and behavior under non-ideal conditions. | 16th Dec 1921 | Box 40 \ 5 Scan060 | |
| Comparing the operation of Bendix and Bijur starter drive mechanisms. | 16th Dec 1921 | Box 40 \ 5 Scan061 | |
| Technical explanation of the advantages and safety features of the Bijur starter drive system. | 16th Dec 1921 | Box 40 \ 5 Scan062 | |
| Specifications for the Bijur drive and requesting information for ordering test samples. | 16th Dec 1921 | Box 40 \ 5 Scan063 | |
| Letter from the European Representative to Henri Lauer regarding a starter motor sample and layout drawing No.E-1236. | 16th Dec 1921 | Box 40 \ 5 Scan064 | |
| Sketch of an automatic gear shifting device for an electric starter in its disengaged position. | 16th Dec 1921 | Box 40 \ 5 Scan065 | |
| Cross-section sketch of an automatic gear shifting device for an electric starter in the cranking position. | 18th Dec 1921 | Box 40 \ 5 Scan066 | |
| Sketch No. 3 of an automatic gear shifting device for an electric starter. | 16th Dec 1921 | Box 40 \ 5 Scan067 | |
| Letter from Bijur Motor Appliance Company describing an automatic gear engaging device. | 16th Dec 1921 | Box 40 \ 5 Scan068 | |
| Description of the operation of a starter motor engagement mechanism. | 16th Dec 1921 | Box 40 \ 5 Scan069 | |
| Explanation of a starter pinion and flywheel engagement mechanism, with a comparison to the Bendix Drive system. | 16th Dec 1921 | Box 40 \ 5 Scan070 | |
| Technical comparison of a starter drive mechanism with the Bijur drive, focusing on its advantages and safety features. | 16th Dec 1921 | Box 40 \ 5 Scan071 | |
| Flywheel gear cutting and specifications for ordering Bijur drive test samples. | 16th Dec 1921 | Box 40 \ 5 Scan072 | |
| Letter from a European Representative awaiting instructions regarding a test sample starter with a Bijur drive. | 16th Dec 1921 | Box 40 \ 5 Scan073 | |
| Cross-section drawing of an automatic gear shifting device for an electric starter. | 16th Dec 1921 | Box 40 \ 5 Scan074 | |
| Reverse side of a document page featuring a 'Print Room' ink stamp. | 26th Dec 1938 | Box 40 \ 5 Scan075 | |
| Cross-section sketch of an automatic gear shifting device for an electric starter in the cranking position. | 16th Dec 1921 | Box 40 \ 5 Scan076 | |
| Cross-section schematic of an automatic gear shifting device for an electric starter. | 19th Dec 1921 | Box 40 \ 5 Scan077 | |
| The reverse side of a photograph or document page with a purple ink date stamp. | 28th Dec 1921 | Box 40 \ 5 Scan078 | |
| Technical drawing of a Bijur Inboard Type Sleeve Shift with dimensions. | 6th Jan 1921 | Box 40 \ 5 Scan079 | |
| The reverse side of a document showing a purple ink reception stamp from the print department. | 14th Mar 1921 | Box 40 \ 5 Scan080 | |
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