| Description | Date | Identifier | |
| The particulars and brake test results of a motor, deemed unsuitable for the Goshawk engine. | 17th Oct 1921 | Box 51 \ 5 Scan127 | |
| Analysis of motor torque and speed performance under test conditions. | 17th Oct 1921 | Box 51 \ 5 Scan128 | |
| Brake test report for a Smith starter motor. | 10th Oct 1921 | Box 51 \ 5 Scan129 | |
| Performance graph for a Smith Motor Type S.S. | 10th Oct 1921 | Box 51 \ 5 Scan130 | |
| Performance graph showing the efficiency curve of a starter motor. | 23th Mar 1921 | Box 51 \ 5 Scan131 | |
| Acquisition and testing of C.A.V. starter motors for the 40/50 Chassis and Goshawk II. | 23th Mar 1921 | Box 51 \ 5 Scan132 | |
| Letter from C.A. Vandervell & Co. Ltd. proposing suitable starter motors for different chassis and offering samples for testing. | 31th Mar 1921 | Box 51 \ 5 Scan133 | |
| The suitability of starter motors from C.A. Vandervell & Co. for two models, with a request for an opinion. | 4th Apr 1921 | Box 51 \ 5 Scan134 | |
| Letter from C.A. Vandervell & Co Ltd regarding sample starter motors and pricing. | 11th Apr 1921 | Box 51 \ 5 Scan135 | |
| Letter from C.A. Vandervell & Co. Ltd. regarding specifications and pricing for SB and SC starter motors. | 14th Apr 1921 | Box 51 \ 5 Scan136 | |
| Letter sent to Messrs. S. Smith & Sons and C.A. Vandervell regarding a suitable starter motor for 'N' Scheme 838. | 18th Apr 1921 | Box 51 \ 5 Scan137 | |
| Starter motors from supplier C.A. Vandervell & Co. Ltd., including rotation direction and a quotation. | 19th Apr 1921 | Box 51 \ 5 Scan138 | |
| Letter from C.A. Vandervell & Co. Ltd. regarding the adaptation of a type SC starting motor. | 20th Apr 1921 | Box 51 \ 5 Scan139 | |
| Visit to supplier C. A. Vandervell regarding batteries, dynamos, and motors. | 6th May 1921 | Box 51 \ 5 Scan140 | |
| Suitability and testing of various electrical components, including motors, dynamos, and batteries for a small car. | 6th May 1921 | Box 51 \ 5 Scan141 | |
| Standardization of battery terminals, comparing C.A.V. types with others. | 6th May 1921 | Box 51 \ 5 Scan142 | |
| Comparison of C.A.V. Willard batteries for the U.S.A. market, detailing specifications and cell arrangement. | 6th May 1921 | Box 51 \ 5 Scan143 | |
| Letter to C.A. Vandervell & Co. regarding the supply of parts and drawings for a Goshawk II starter motor. | 10th May 1921 | Box 51 \ 5 Scan144 | |
| Letter detailing specifications for a starter motor, including shaft dimensions, bearings, terminals, and rotation. | 10th May 1921 | Box 51 \ 5 Scan145 | |
| Letter from C.A. Vandervell & Co. Ltd. regarding a 5' starter motor and its attached efficiency curve. | 17th May 1921 | Box 51 \ 5 Scan146 | |
| Letter to Messrs C.A. Vandervell & Co. Ltd, requesting drawings for a driving end bracket and magnet case. | 10th May 1921 | Box 51 \ 5 Scan147 | |
| Letter to C.A. Vandervell & Co. regarding the starter motor for the 'Goshawk II', discussing stud sizes, bearings, and a clerical error with a drawing. | 18th May 1921 | Box 51 \ 5 Scan148 | |
| Letter from C.A. Vandervell & Co., Ltd. regarding drawings for a Dynamo & Motor for a Goshawk II Engine. | 1st Jul 1921 | Box 51 \ 5 Scan149 | |
| Letter to C.A. Vandervell & Co. regarding drawings and modifications for a 'Goshawk II' engine starter motor. | 1st Jul 1921 | Box 51 \ 5 Scan150 | |
| Letter requesting prompt approval of drawings to proceed with the production of motor parts. | 10th Oct 1930 | Box 51 \ 5 Scan151 | |
| Letter from C.A. Vandervell & Co. Ltd. concerning the starter motor for the Goshawk II. | 4th Jul 1921 | Box 51 \ 5 Scan152 | |
| Letter from C.A. Vandervell & Co. regarding a Starter Motor for the 'Goshawk II' Engine, enclosing blueprints and part details. | 5th Jul 1921 | Box 51 \ 5 Scan153 | |
| Letter to C.A. Vandervell & Co. regarding design changes for the 'Goshawk II' starter motor. | 7th Jul 1921 | Box 51 \ 5 Scan154 | |
| Alternative C.A.V. and Smith starter motors for the Goshawk II engine. | 9th Jul 1921 | Box 51 \ 5 Scan155 | |
| Extract from a C.A.V. letter about a starter motor for the 'Goshawk II'. | 12th Jul 1921 | Box 51 \ 5 Scan156 | |
| Clarifying a clerical error in the diameter of a C.A.V. make starter motor for a 'Goshawk II' engine. | 12th Jul 1921 | Box 51 \ 5 Scan157 | |
| Discrepancy in specifications for a Starter Motor and Dynamo order for the 'Goshawk 11' engine. | 12th Jul 1921 | Box 51 \ 5 Scan158 | |
| Internal memorandum regarding an order acknowledgement from C.A. Vandervell & Co. Ltd. for a Starter Motor & Dynamo for the Coshawk II. | 18th Jul 1921 | Box 51 \ 5 Scan159 | |
| Letter from G.A. Vandervell & Co Ltd regarding order specifications for a C.A.V. dynamo and an 'SC' type starter motor. | 15th Jul 1921 | Box 51 \ 5 Scan160 | |
| Page 2 of a letter from C. A. Vandervell & Company Ltd. regarding a price consideration. | 10th Dec 1920 | Box 51 \ 5 Scan161 | |
| Letter concerning the electrical system for a dynamo and motor for the 'Goshawk' project, with a query about battery terminals. | 8th Sep 1921 | Box 51 \ 5 Scan162 | |
| Letter to C. A. Vandervell & Co. Ltd. arranging the loan of a brake pulley for testing a C.A.V. motor for the Goshawk engine. | 9th Sep 1921 | Box 51 \ 5 Scan163 | |
| Requesting the despatch of a brake wheel to supplier C.A. Vandervell for testing a Goshawk II starter motor. | 9th Sep 1921 | Box 51 \ 5 Scan164 | |
| Letter from C.A. Vandervell & Co. Ltd. concerning modifications to a Dynamo and Motor for the 'Goshawk' project. | 9th Sep 1921 | Box 51 \ 5 Scan165 | |
| Letter from C.A. Vandervell & Co Ltd regarding a brake pulley for testing the C.A.V. Starter for the Goshawk engine. | 13th Sep 1921 | Box 51 \ 5 Scan166 | |
| Letter to Messrs. C.A. Vandervell & Co. Ltd. requesting the urgent return of a loaned brake pulley for motor tests. | 24th Sep 1921 | Box 51 \ 5 Scan167 | |
| Letter from C.A. Vandervell & Co. Ltd. confirming the return of a Brake Pulley for Motor Tests. | 27th Sep 1921 | Box 51 \ 5 Scan168 | |
| Preliminary report on a C.A.V. Starter Motor, comparing it to an S.B. type. | 28th Oct 1921 | Box 51 \ 5 Scan169 | |
| Letter to C.A. Vandervell & Co. Ltd. requesting two spare brushes for a motor after one was accidentally broken. | 31th Oct 1921 | Box 51 \ 5 Scan170 | |
| Technical report on the C.A.V. motor for 'Goshawk' II. | 31th Oct 1921 | Box 51 \ 5 Scan171 | |
| Specifications and test results of a motor, including dimensions and electrical characteristics. | 31th Oct 1921 | Box 51 \ 5 Scan172 | |
| Performance analysis of a motor for the Goshawk engine under various test conditions. | 31th Oct 1921 | Box 51 \ 5 Scan173 | |
| The performance of a motor under load, comparing it to other models and suggesting its use on a Goshawk chassis. | 31th Oct 1921 | Box 51 \ 5 Scan174 | |
| Graph showing the brake efficiency and performance curves for a Type S.C. starter motor on a Goshawk chassis. | 31th Oct 1921 | Box 51 \ 5 Scan175 | |
| Performance characteristic chart for the X 4342 C.A.V. Motor Type S.C. | 21th Oct 1921 | Box 51 \ 5 Scan176 | |
| Brake test results for a C.A.V. Type S.C. starter motor. | 21th Oct 1921 | Box 51 \ 5 Scan177 | |
| Brake test report for a starter motor. | 21th Oct 1921 | Box 51 \ 5 Scan178 | |
| Instruction sheet with test results for a C.A.V. DB Goshawk Dynamo at 20°C. | 1st Dec 1921 | Box 51 \ 5 Scan179 | |
| Instruction sheet detailing voltage settings for a C.A.V. D.B. Goshawk Dynamo at various speeds. | 1st Nov 1921 | Box 51 \ 5 Scan180 | |
| Letter from C.A. Vandervell & Co. regarding an order for spare dynamo and motor brushes. | 3rd Nov 1921 | Box 51 \ 5 Scan181 | |
| C.A.V. dynamo for the 'Goshawk II' and recommending specific LeCarbone brushes. | 9th Nov 1921 | Box 51 \ 5 Scan182 | |
| Letter to C.A. Vandervell & Co. Ltd. regarding the quality and performance of brushes for a small dynamo and motor. | 11th Nov 1921 | Box 51 \ 5 Scan183 | |
| Broken brush spring and ill-fitting replacement brushes causing noise, with a suggestion for improvement. | 16th Nov 1921 | Box 51 \ 5 Scan184 | |
| Correspondence regarding quotations for Dynamos and Motors for the Goshawk II engine from C.A. Vandervell and Rotax. | 16th Nov 1921 | Box 51 \ 5 Scan185 | |
| Letter from C.A. Vandervell & Co. Ltd. concerning the supply and specifications of motor brushes. | 18th Nov 1921 | Box 51 \ 5 Scan186 | |
| Correspondence regarding a delay in receiving a price quotation from C.A. Vandervell & Co. for dynamos and motors for the Goshawk 11 project. | 22th Nov 1921 | Box 51 \ 5 Scan187 | |
| Letter to C.A. Vandervell & Co Ltd regarding brushes and a suggested terminal cover for small dynamos. | 28th Nov 1921 | Box 51 \ 5 Scan188 | |
| Extract concerning a visit to West Wittering about the Goshawk II engine's electric starter. | 30th Dec 1921 | Box 51 \ 5 Scan189 | |
| Letter to Messrs. C.A. Vandervell & Co. Ltd. regarding a special electrical arrangement for a starter motor. | 23th Jan 1922 | Box 51 \ 5 Scan190 | |
| Letter from C.A. Vandervell & Co. Ltd. regarding the feasibility of special windings for a starter motor. | 24th Jan 1922 | Box 51 \ 5 Scan191 | |
| Page 2 of a continuation letter from C.A.V. & Co., Ltd. | 28th May 1930 | Box 51 \ 5 Scan192 | |
| Letter from C.A. Vandervell & Co. regarding starter motors and arranging a meeting in Derby. | 26th Jan 1922 | Box 51 \ 5 Scan193 | |
| Letter from C. A. V. & Co., Ltd. regarding a proposed meeting in Derby. | 27th Jan 1922 | Box 51 \ 5 Scan194 | |
| Letter to C.A. Vandervell & Co. Ltd. regarding the feasibility of incorporating special windings into small starter motors. | 27th Jan 1922 | Box 51 \ 5 Scan195 | |
| The return of three unused C.A.V. 'SC' starter motors for a potential price if returned. | 21th Sep 1923 | Box 51 \ 5 Scan196 | |
| 12-volt engine starter from Lucas for a Wolseley 'Hornet' chassis. | 2nd Jun 1931 | Box 51 \ 5 Scan197 | |
| Short memo confirming the dispatch of one small Lucas starter motor. | 2nd Jun 1931 | Box 51 \ 5 Scan198 | |
| The dispatch of a small Lucas starter motor to a customer at no charge. | 2nd Jun 1931 | Box 51 \ 5 Scan199 | |
| Requesting the return of a Lucas starter motor after inspection. | 3rd Nov 1931 | Box 51 \ 5 Scan200 | |
| Letter from Joseph Lucas Limited acknowledging receipt of starter motor calculations. | 3rd Jun 1932 | Box 51 \ 5 Scan201 | |
| Letter from Joseph Lucas Limited confirming the dispatch of a sample 4 1/2 inch machine and its accompanying drawing. | 3rd Jun 1932 | Box 51 \ 5 Scan202 | |
| Letter to Joseph Lucas Co. Ltd. regarding patent numbers for a Bijur starter motor drive and a preference for this quieter system for a Bentley sports car. | 7th Jun 1932 | Box 51 \ 5 Scan203 | |
| Page 2 of a letter regarding starter motor engagement and proposals for Bentley electrical equipment. | 8th Jun 1932 | Box 51 \ 5 Scan204 | |
| Letter from Joseph Lucas Research Laboratories concerning starter engaging gear drives for a Bentley Sports car. | 8th Jun 1932 | Box 51 \ 5 Scan205 | |
| Letter from Joseph Lucas Ltd. following up on the adaptability and pricing of Slow Engagement Starters. | 9th Jun 1932 | Box 51 \ 5 Scan206 | |
| Drawings for the 'Goshawk II' battery ignition gear's advance and retard governor. | 1st May 1921 | Box 51 \ 5 Scan207 | |
| Drawing Lec.1432 for the revised ignition governor on the Goshawk II engine. | 1st Jul 1921 | Box 51 \ 5 Scan208 | |
| The distribution of blueprints for the 'Goshawk II' ignition governor experiment. | 19th Aug 1921 | Box 51 \ 5 Scan209 | |
| Revised specification for the Goshawk II engine's battery ignition advance. | 28th Oct 1921 | Box 51 \ 5 Scan210 | |
| Outlining the requirement for a test rig for the Goshawk 11 Governor's automatic advance. | 18th Nov 1921 | Box 51 \ 5 Scan211 | |
| Inadequate venting on the high tension distributor for the Goshawk 11 battery ignition system, causing verdigris buildup. | 16th Dec 1921 | Box 51 \ 5 Scan212 | |
| Revised drawing for clips on the battery ignition distributor moulding. | 17th Dec 1921 | Box 51 \ 5 Scan213 | |
| Extract discussing the rationale for retaining manual ignition control alongside automatic control for the Goshawk engine. | 23th Mar 1922 | Box 51 \ 5 Scan214 | |
| Issues with the Goshawk ignition governor's advance characteristic and the need for a new design. | 24th Mar 1922 | Box 51 \ 5 Scan215 | |
| Continuation of a report discussing a required advance characteristic and a variable motion ratio for a cam mechanism. | 24th Mar 1922 | Box 51 \ 5 Scan216 | |
| Design and automatic advance requirements for the Goshawk engine's ignition governor. | 27th Mar 1922 | Box 51 \ 5 Scan217 | |
| Explanation of a diagram and curves detailing the dynamic couple exerted by governor weights for engine timing. | 27th Mar 1922 | Box 51 \ 5 Scan218 | |
| Continued analysis of a governor system, discussing the relationship between spring characteristics, speed, and advance curves. | 27th Mar 1922 | Box 51 \ 5 Scan219 | |
| Analysis of governor performance by comparing various actual and ideal cam advance curves against engine requirements. | 1st Mar 1922 | Box 51 \ 5 Scan220 | |
| Governor weight characteristics and advance curves. | 27th Aug 1922 | Box 51 \ 5 Scan221 | |
| Page discussing the physics and design limitations of a governor mechanism, specifically concerning spring action and weight motion. | 27th Mar 1922 | Box 51 \ 5 Scan222 | |
| Developing a satisfactory automatic ignition advance, with comparisons to the Bosch ignition system. | 27th Mar 1922 | Box 51 \ 5 Scan223 | |
| Graph showing the advance characteristics of the Goshawk ignition governor. | 23th Mar 1922 | Box 51 \ 5 Scan224 | |
| Diagram for determining the advance characteristic of the Goshawk ignition governor. | 23th Mar 1922 | Box 51 \ 5 Scan225 | |
| Goshawk II battery ignition and the governor's function for preliminary advance. | 28th Mar 1922 | Box 51 \ 5 Scan226 | |
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