| Description | Date | Identifier | |
| Test report comparing Rapson Cord Tyres (33 x 6.75) against standard Dunlop tyres on noise, comfort, and handling. | 11th Jul 1928 | Box 39 \ 1 Scan201 | |
| The testing and subsequent rejection of Rapson cord tyres due to excessive noise at low speeds. | 17th Jul 1928 | Box 39 \ 1 Scan202 | |
| Request for a preliminary report on a set of Rapson Tyres under observation. | 18th Aug 1928 | Box 39 \ 1 Scan203 | |
| Return of four unsatisfactory tyres to Messrs. Rapson due to groaning and vibrations. | 1st Sep 1928 | Box 39 \ 1 Scan204 | |
| Letter regarding the replacement of a Bijur dynamo and electrical output calculations for a 20 HP car dynamo. | 6th Feb 1919 | Box 39 \ 2 Scan001 | |
| The design of a dynamo and motor for a 20 HP chassis. | 24th Mar 1919 | Box 39 \ 2 Scan002 | |
| 20 HP starter motor and dynamo, requesting models be made. | 9th Apr 1919 | Box 39 \ 2 Scan003 | |
| Requesting that models of the brush holders for the 20 HP chassis dynamo and starter motor be made and sent to West Wittering. | 10th Apr 1919 | Box 39 \ 2 Scan004 | |
| Cover memo for a print of a Dynamo & Starter Motor diagram for a 20 HP Chassis. | 14th Apr 1919 | Box 39 \ 2 Scan005 | |
| The allocation of work for the Dynamo & Starter Motor on the 20 HP Chassis. | 15th Apr 1919 | Box 39 \ 2 Scan006 | |
| Proposal to use a Bijur trembler regulator for the dynamo on the 20 HP and new 50 HP chassis. | 8th May 1919 | Box 39 \ 2 Scan007 | |
| Proposal from Westland Aircraft Co. to drive propellers from both ends of 'Eagle' or 'Falcon' engines. | 29th May 1919 | Box 39 \ 2 Scan008 | |
| Letter from Westland Aircraft Works discussing the feasibility of modifying 'Eagle' V1ll engines. | 12th May 1919 | Box 39 \ 2 Scan009 | |
| Calculations for dynamo speed on a 20 HP vehicle based on tyre size, axle and gear ratios. | 28th Apr 1917 | Box 39 \ 2 Scan010 | |
| Request for two blueprints of drawings for the 20 HP Chassis - 6060. | 7th Aug 1919 | Box 39 \ 2 Scan011 | |
| Instruction to make six experimental sets of dynamo components for a 20 HP chassis from the provided blueprints. | 29th Aug 1919 | Box 39 \ 2 Scan012 | |
| The specifications found after dismantling a C.A.V. N.G.R.R. type 20 HP dynamo. | 8th Sep 1919 | Box 39 \ 2 Scan013 | |
| Requesting specifications after dismantling a C.A.V. armature for a 20 HP dynamo. | 9th Sep 1919 | Box 39 \ 2 Scan014 | |
| List of electrical apparatus models required for Mr. Royce's inspection. | 12th Sep 1919 | Box 39 \ 2 Scan015 | |
| The specifications for the winding of a C.A.V. N.G.R.R. type dynamo. | 17th Sep 1919 | Box 39 \ 2 Scan016 | |
| Continuation page of a document discussing a 20 HP dynamo. | 12th Sep 1919 | Box 39 \ 2 Scan017 | |
| Requesting recommendations and providing a status update on the vibrator regulator for the 20 HP chassis. | 18th Sep 1919 | Box 39 \ 2 Scan018 | |
| Mr. Royce's urgent request for model brush holders for a 20 HP chassis dynamo and motor. | 27th Oct 1919 | Box 39 \ 2 Scan019 | |
| Using a brush holder from a 40/50 Horse model for a 20 Horse dynamo motor. | 28th Oct 1919 | Box 39 \ 2 Scan020 | |
| Progress report on the 20 HP dynamo and motor for Mr. Royce. | 18th Feb 1920 | Box 39 \ 2 Scan021 | |
| Responding to an inquiry about the status of the Goshawk Dynamo & Motor, specifically regarding mechanical parts and windings. | 20th Feb 1920 | Box 39 \ 2 Scan022 | |
| Dynamo winding arrangement for the Goshawk model. | 22th Mar 1920 | Box 39 \ 2 Scan023 | |
| Design specifications for a silent and efficient dynamo for the 'Goshawk'. | 16th Apr 1920 | Box 39 \ 2 Scan024 | |
| Arranging the dynamo windings for the Goshawk engine based on Mr. Royce's instructions. | 20th Apr 1920 | Box 39 \ 2 Scan025 | |
| Confirming the dispatch of two blueprints for a Goshawk Engine Dynamo Driving Gear Wheel to make experimental sets. | 5th May 1929 | Box 39 \ 2 Scan026 | |
| Speed ratios of the 'Goshawk' dynamo and motor. | 25th Oct 1920 | Box 39 \ 2 Scan027 | |
| Two experimental armature winding designs for the 'Goshawk' dynamo. | 4th Dec 1920 | Box 39 \ 2 Scan028 | |
| Specifications for armature and field winding. | 4th Dec 1920 | Box 39 \ 2 Scan029 | |
| Calculation sheet for a four-pole dynamo for the 'Goshawk' project, part I. | 6th Dec 1920 | Box 39 \ 2 Scan030 | |
| Specification table comparing two different armature designs. | 6th Dec 1920 | Box 39 \ 2 Scan031 | |
| Calculation sheet for wire arrangement and dimensions within slots. | 6th Dec 1920 | Box 39 \ 2 Scan032 | |
| Calculation table for Ampere Turns for various motor or generator components. | 6th Dec 1920 | Box 39 \ 2 Scan033 | |
| Calculation sheet comparing two wire gauges (18 S.W.G. and 19 S.W.G.) for a field winding. | 13th Dec 1932 | Box 39 \ 2 Scan034 | |
| Distributing blueprints for a Goshawk Dynamo brush holder and proceeding without waiting for Mr Royce's approval. | 13th Dec 1932 | Box 39 \ 2 Scan035 | |
| Proposed modified Brush Holder for a Goshawk Dynamo based on scheme 674. | 10th Dec 1920 | Box 39 \ 2 Scan036 | |
| Heating tests on dynamos and the development of a dynamo for the Goshawk engine. | 13th Dec 1920 | Box 39 \ 2 Scan037 | |
| Requesting electrical approval for the Goshawk Dynamos drawing 'N' Scheme 691. | 16th Dec 1920 | Box 39 \ 2 Scan038 | |
| Blueprints for two proposed armatures for the Goshawk Dynamo winding. | 16th Dec 1920 | Box 39 \ 2 Scan039 | |
| Approving the electrical details for the 'Goshawk' Dynamo, scheme 691. | 17th Dec 1920 | Box 39 \ 2 Scan040 | |
| Two armature winding arrangements, 27 and 31 slots, for the Goshawk Dynamo. | 17th Dec 1920 | Box 39 \ 2 Scan041 | |
| From 'E.' confirming Mr. Royce's approval to proceed with proposals for the 'Goshawk' Dynamo - N. Scheme 691. | 30th Dec 1920 | Box 39 \ 2 Scan042 | |
| Design alterations for the Goshawk I and II dynamo and brush holders. | 1st Jan 1921 | Box 39 \ 2 Scan043 | |
| Providing blueprints for Dynamo and Motor brushes for the 'Goshawk' I chassis and requesting an order for testing samples. | 1st Jan 1921 | Box 39 \ 2 Scan044 | |
| Technical memo detailing parts for the 'Goshawk' I Dynamo Brush Holder. | 1st Jan 1921 | Box 39 \ 2 Scan045 | |
| Request to order various grades of Goshawk dynamo brushes from the Morganite Co. and Le Carbone Co. for experimental purposes. | 25th Jan 1921 | Box 39 \ 2 Scan046 | |
| Instructing a department to cease experimental work on vibrator regulators. | 9th Feb 1921 | Box 39 \ 2 Scan047 | |
| Arrangement of the 'Goshawk II' dynamo and a request for catalogues of alternative English-made machines. | 14th Feb 1921 | Box 39 \ 2 Scan048 | |
| Design and control methods for the 40/50 Chassis and Goshawk dynamos. | 16th Feb 1921 | Box 39 \ 2 Scan049 | |
| Instruction from Mr. Royce to abandon vibrator regulator work and focus on third brush control dynamos. | 22th Feb 1921 | Box 39 \ 2 Scan050 | |
| Standardisation of carcase dimensions for electrical equipment like dynamos and starter motors. | 10th Dec 1932 | Box 39 \ 2 Scan051 | |
| Specifications for new designs of dynamos and motors. | 3rd Mar 1921 | Box 39 \ 2 Scan052 | |
| Design specifications for a dynamo, including a request for calculations from Mr. Royce. | 10th Dec 1920 | Box 39 \ 2 Scan053 | |
| Confirming receipt of various qualities of carbon dynamo brushes for the Goshawk from Le Carbone Co. | 7th Mar 1921 | Box 39 \ 2 Scan054 | |
| Modifications to dynamos for the 40/50 and Goshawk chassis, including adding a third brush. | 7th Mar 1921 | Box 39 \ 2 Scan055 | |
| Mr. Royce's decisions on dynamo development, testing, costing, and design. | 7th Mar 1921 | Box 39 \ 2 Scan056 | |
| Requesting approval for the addition of a control brush to the dynamo for Goshawk I & II and 40/50 models. | 16th Mar 1921 | Box 39 \ 2 Scan057 | |
| Prints for Goshawk I & II starter motor and dynamo brush holders. | 16th Mar 1921 | Box 39 \ 2 Scan058 | |
| Requesting agreement for calculations regarding an alteration to the Goshawk Dynamo and Starter Motor Dynamo's field winding. | 18th Mar 1921 | Box 39 \ 2 Scan059 | |
| Confirming agreement on the electrical points for adding a control brush to the R.R. and Goshawk dynamos. | 21th Mar 1921 | Box 39 \ 2 Scan060 | |
| Confirming the dispatch of three blueprints for a Goshawk I dynamo brush re-arrangement. | 22th Mar 1921 | Box 39 \ 2 Scan061 | |
| Issuing details and parts lists for Goshawk I Dynamo Armatures and Commutators. | 5th Apr 1921 | Box 39 \ 2 Scan062 | |
| Design and manufacturing suggestions for various armature and coil components. | 1st Apr 1921 | Box 39 \ 2 Scan063 | |
| Experimental Armatures for the 'Goshawk' I Dynamo, enclosing blueprint drawings. | 1st Apr 1921 | Box 39 \ 2 Scan064 | |
| Specification for the electrical operation of a dynamo for the R.R. Goshawk (12 Volt System). | 21th Apr 1921 | Box 39 \ 2 Scan065 | |
| Specified performance data for a Goshawk dynamo under fully hot conditions. | 22th Apr 1921 | Box 39 \ 2 Scan066 | |
| Parts and blueprints for the 'Goshawk I' declutching gear, section 8110. | 2nd May 1921 | Box 39 \ 2 Scan067 | |
| Close proximity of the Actuator Box to the Oil Pump Drive boss on the crankcase due to a drawing error. | 19th Apr 1921 | Box 39 \ 2 Scan068 | |
| Alterations to blueprints for the 'Goshawk' I - Dynamo and Motor. | 1st Apr 1921 | Box 39 \ 2 Scan069 | |
| Note on pausing work on the Dynamo & Motor for the Goshawk I to focus on sourcing parts for the Goshawk II. | 24th May 1921 | Box 39 \ 2 Scan070 | |
| Design changes for the Goshawk I dynamo, including armature diameter and slot numbers, following a discussion with Mr. Royce. | 1st Jun 1921 | Box 39 \ 2 Scan071 | |
| Design modifications for a dynamo, including changes to the pole, brush sizes, and carcase. | 1st Jun 1921 | Box 39 \ 2 Scan072 | |
| Awaiting sketches for Dynamo and Starter Motors for Goshawk I & II before proceeding with design calculations. | 7th Jun 1921 | Box 39 \ 2 Scan073 | |
| Calculations regarding an alteration to the Goshawk field winding for the control brush. | 15th Mar 1921 | Box 39 \ 2 Scan074 | |
| Effect of crankcase vapours on the generators of the Goshawk 11 engine. | 15th Nov 1921 | Box 39 \ 2 Scan075 | |
| Dynamo and motor designs for the Goshawk I experimental chassis, comparing specifications with the Goshawk II. | 31th Aug 1922 | Box 39 \ 2 Scan076 | |
| Electrical and mechanical design differences between two motors and seeking clarification on design direction from Mr. Royce. | 31th Aug 1922 | Box 39 \ 2 Scan077 | |
| Overlooked enquiry and a recommendation to fit a Goshawk II dynamo and motor onto a Goshawk I engine. | 6th Sep 1922 | Box 39 \ 2 Scan078 | |
| Cover note forwarding a memo to finalise the dynamo and motor for the Goshawk I engine. | 27th Sep 1922 | Box 39 \ 2 Scan079 | |
| Listing new parts required for a dynamo's special armature and bearing bracket section. | 13th Feb 1923 | Box 39 \ 2 Scan080 | |
| Performance graph showing the specified and actual output of a 20 HP dynamo. | 1st Feb 1926 | Box 39 \ 2 Scan081 | |
| The back of a document page with a print room receipt stamp. | 15th Feb 1926 | Box 39 \ 2 Scan082 | |
| Trial of special Dunlop tyres, noting their excessive noise compared to Dunlop Magnums. | 28th Oct 1920 | Box 39 \ 2 Scan083 | |
| Letter to Dunlop Rubber Co. Ltd. detailing tyre pressure tests and mileage results for cord tyres on a 40/50 chassis. | 29th Sep 1921 | Box 39 \ 2 Scan084 | |
| Letter discussing tyre pressures for cars over 50 cwts and offering a demonstration. | 29th Sep 1921 | Box 39 \ 2 Scan085 | |
| Letter from Dunlop concerning tyre wear, pressures, and providing new tyres for testing. | 3rd Oct 1921 | Box 39 \ 2 Scan086 | |
| Letter from Dunlop Rubber Co Ltd. discussing tyre inflation pressures and durability. | 3rd Oct 1921 | Box 39 \ 2 Scan087 | |
| Michelin tyre pressures being set to 85 lbs per square inch. | 13th Oct 1938 | Box 39 \ 2 Scan088 | |
| Conflicting tyre pressure recommendations for Michelin Cable Tyres and their impact on ride quality. | 12th Oct 1921 | Box 39 \ 2 Scan089 | |
| Michelin Cable Tyre pressures affecting ride comfort and seeking instructions. | 11th Oct 1921 | Box 39 \ 2 Scan090 | |
| Benefits of lower tyre pressures and the strategy for engaging with tyre manufacturers. | 13th Oct 1921 | Box 39 \ 2 Scan091 | |
| Tyre pressures, balancing comfort, wear, and a comparison with a Marmon car. | 13th Oct 1921 | Box 39 \ 2 Scan092 | |
| Letter to Goodyear Tyre & Rubber Co. regarding tyre pressures for straight-sided cord tyres. | 30th Sep 1921 | Box 39 \ 2 Scan093 | |
| Letter to Dunlop Rubber Co. Ltd. detailing tyre pressure tests and their effect on wear and mileage for cord tyres versus fabric tyres on a 40/50 HP chassis. | 29th Sep 1921 | Box 39 \ 2 Scan094 | |
| Letter offering to demonstrate the difference in ride comfort with different tyre pressures. | 13th Oct 1921 | Box 39 \ 2 Scan095 | |
| Case for lower tyre pressures and the approach to be taken with tyre manufacturers. | 13th Oct 1921 | Box 39 \ 2 Scan096 | |
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