| Description | Date | Identifier | |
| Graph showing the results of main-brush position tests on a Goshawk Dynamo, plotting ampere output against dynamo RPM. | 7th Feb 1934 | Box 50 \ 5 Scan176 | |
| Graph showing main-brush position tests for a Goshawk dynamo, plotting ampere output against RPM under various conditions. | 27th Nov 1933 | Box 50 \ 5 Scan177 | |
| Graph of Main-Brush Position Tests on a Goshawk Dynamo No. 288, plotting Ampere Output versus Dynamo R.P.M. | 1st Dec 1936 | Box 50 \ 5 Scan178 | |
| Performance graph of main-brush position tests on a Standard 'R' Goshawk Dynamo. | 3rd May 1923 | Box 50 \ 5 Scan179 | |
| Standardisation proposal for altering the angular position of Goshawk dynamo main brushes. | 3rd May 1923 | Box 50 \ 5 Scan180 | |
| Imperfect commutation on a Goshawk dynamo caused by mica not being completely cleared during under-cutting. | 15th May 1923 | Box 50 \ 5 Scan181 | |
| Points for consideration and experiment regarding the dynamo and other electrical equipment. | 30th May 1923 | Box 50 \ 5 Scan182 | |
| Preliminary report on the re-investigation of dynamo regulation, brush sparking, and commutation tests. | 12th Jun 1923 | Box 50 \ 5 Scan183 | |
| Recurring dynamo failures in 20-HP cars and the investigation required. | 7th Jun 1923 | Box 50 \ 5 Scan184 | |
| Seeking clarification on whether a new brush holder design is for the E.A.C. dynamo or the 20 HP brush gear. | 11th Jun 1923 | Box 50 \ 5 Scan185 | |
| Secret memo regarding a new design for Goshawk brush holders. | 14th Jun 1923 | Box 50 \ 5 Scan186 | |
| Load and pressure of Goshawk dynamo brush springs and suggesting improvements. | 19th Jun 1923 | Box 50 \ 5 Scan187 | |
| Suggesting an experiment to improve 20 HP dynamo commutation and discussing its noisiness and current density. | 19th Jun 1923 | Box 50 \ 5 Scan188 | |
| Continuous running tests of a 20 HP dynamo, focusing on brush and commutator wear. | 27th Jun 1923 | Box 50 \ 5 Scan189 | |
| Examination report on brush and commutator wear after a 2500-mile test run. | 27th Jun 1923 | Box 50 \ 5 Scan190 | |
| Test report on commutator sparking and brush wear under various conditions. | 27th Jun 1923 | Box 50 \ 5 Scan191 | |
| Machine testing, detailing brush wear measurements after a 5000-mile equivalent run and outlining future comparative tests. | 27th Jun 1923 | Box 50 \ 5 Scan192 | |
| Continuous running tests for a 20 HP Dynamo, investigating the effects of reversing polarity on the brush and commutator. | 30th Jun 1923 | Box 50 \ 5 Scan193 | |
| Test report on the polarity and commutation of Goshawk Dynamos. | 2nd Jul 1923 | Box 50 \ 5 Scan194 | |
| Instructions detailing observations on intermittent flashing on brushes and commutator polarity. | 6th Nov 1918 | Box 50 \ 5 Scan195 | |
| Instructions concerning dynamo brush spring pressures for the Goshawk engine. | 3rd Jul 1923 | Box 50 \ 5 Scan196 | |
| Instructions detailing pressure measurements for brushes on various dynamo models. | 6th Nov 1918 | Box 50 \ 5 Scan197 | |
| Comparison of brush pressures on Goshawk, R. Bosch, and Scintilla dynamos. | 6th Nov 1918 | Box 50 \ 5 Scan198 | |
| Further tests of Z brushes for Dynamo 288. | 16th Jul 1923 | Box 50 \ 5 Scan199 | |
| Comparison table of 20 HP Dynamo Brushes from manufacturers Morganite and Le Carbone. | 17th Jul 1923 | Box 50 \ 5 Scan200 | |
| Analysis of 20 HP dynamo brush spring pressures and related test results. | 17th Jul 1923 | Box 50 \ 5 Scan201 | |
| Intermittent and continuous running tests on a rig with different brushes and speeds. | 17th Jul 1923 | Box 50 \ 5 Scan202 | |
| Dynamo, cutout, and distribution box failures and recommended improvements. | 19th Jul 1923 | Box 50 \ 5 Scan203 | |
| Faults with magneto ignition systems and dynamos, including proposed solutions and inspector feedback. | 19th Jul 1923 | Box 50 \ 5 Scan204 | |
| Inspection report on a faulty dynamo, detailing a burnt commutator, melted solder, and worn brushes. | 25th Jul 1923 | Box 50 \ 5 Scan205 | |
| Report investigating the excessive output from 20 HP dynamos after being placed on the chassis. | 25th Jul 1923 | Box 50 \ 5 Scan206 | |
| Rectifying faults related to brush alignment, bedding, and output in a machine, possibly a dynamo. | 25th Jul 1923 | Box 50 \ 5 Scan207 | |
| Dynamo commutator and brush performance, focusing on blackening and bedding issues. | 25th Jul 1923 | Box 50 \ 5 Scan208 | |
| Continued page discussing the positive brush, commutator heating, and instructions for excessive output. | 25th Jul 1923 | Box 50 \ 5 Scan209 | |
| Specification for the inspection and readjustment of faulty dynamos. | 25th Jul 1923 | Box 50 \ 5 Scan210 | |
| Troubleshooting and summary page for brush gear maintenance and adjustment. | 23th Aug 1923 | Box 50 \ 5 Scan211 | |
| The Goshawk dynamo's commutation, focusing on the surface condition of the positive brush at reduced output. | 23th Aug 1923 | Box 50 \ 5 Scan212 | |
| Test report on a Goshawk dynamo with reduced output, investigating the effect of current density on dynamo brushes. | 18th Aug 1923 | Box 50 \ 5 Scan213 | |
| Order for various grades of 20 HP dynamo brushes. | 31th Aug 1923 | Box 50 \ 5 Scan214 | |
| Investigation into the failure of 20HP dynamo brush holders. | 11th Sep 1923 | Box 50 \ 5 Scan215 | |
| Investigation into cracking on brush holders, concluding it is not season cracking and recommending a change in material. | 11th Sep 1923 | Box 50 \ 5 Scan216 | |
| The process for undercutting commutator bars on the 20HP chassis dynamo to clear mica. | 18th Sep 1923 | Box 50 \ 5 Scan217 | |
| Examination of a 20 HP Dynamo failure, identifying the cause as an incorrectly fitted negative brush. | 27th Sep 1923 | Box 50 \ 5 Scan218 | |
| Technical note regarding heating and solder melting in commutator connections. | 27th Sep 1923 | Box 50 \ 5 Scan219 | |
| Weakness in the third brush system of control for the 20 HP dynamo. | 27th Sep 1923 | Box 50 \ 5 Scan220 | |
| Report discussing the probable causes of dynamo overheating related to brush contact and bedding. | 27th Sep 1923 | Box 50 \ 5 Scan221 | |
| Proposed tests to investigate dynamo failures, specifically relating to melting solder and faulty brush bedding. | 28th Sep 1923 | Box 50 \ 5 Scan222 | |
| Concluding paragraph of a report urging for the quick implementation of tests to address failures. | 28th Sep 1923 | Box 50 \ 5 Scan223 | |
| Tests concerning variations of brush bedding on 20 HP dynamos and the resulting effects on output and heating. | 1st Oct 1923 | Box 50 \ 5 Scan224 | |
| The performance of an electrical machine under different brush contact positions and temperatures. | 1st Oct 1923 | Box 50 \ 5 Scan225 | |
| Analysis of dynamo failures, focusing on variations in brush bedding and design limitations of the 20 HP brush gear. | 1st Oct 1923 | Box 50 \ 5 Scan226 | |
| The frictional effects and forces acting on a brush within its holder and on the commutator. | 1st Oct 1928 | Box 50 \ 5 Scan227 | |
| Inclining a brush surface in its holder to counteract commutator friction by creating an opposing tangential force. | 1st Oct 1923 | Box 50 \ 5 Scan228 | |
| Continuation of a report on dynamo brush modifications, including slant angle adjustments and causes for overheating. | 1st Oct 1923 | Box 50 \ 5 Scan229 | |
| Fuse wire testing for a dynamo circuit, including performance data under cold and hot conditions. | 1st Oct 1923 | Box 50 \ 5 Scan230 | |
| The suitability of fuses for experimental cars, proposing a new glass tube type for customer convenience. | 1st Oct 1923 | Box 50 \ 5 Scan231 | |
| Request for the production of several sets of improved dynamo brush springs, with two blueprints provided. | 2nd Oct 1923 | Box 50 \ 5 Scan232 | |
| The unauthorised use of underweight springs for Dynamo No. 318, leading to production issues. | 3rd Oct 1923 | Box 50 \ 5 Scan233 | |
| List of Goshawk dynamo experiments to be run on an experimental chassis. | 4th Oct 1923 | Box 50 \ 5 Scan234 | |
| The status of ordered dynamo brushes for E.A.C. and Goshawk dynamos. | 5th Oct 1923 | Box 50 \ 5 Scan235 | |
| Handing over a complete Goshawk dynamo armature for specialist work on the commutator. | 8th Oct 1923 | Box 50 \ 5 Scan236 | |
| Error with dynamo brushes supplied with unwanted coppering and asking if they should be returned for correction. | 8th Oct 1923 | Box 50 \ 5 Scan237 | |
| Difficulties of machining a lighting dynamo commutator. | 13th Oct 1923 | Box 50 \ 5 Scan238 | |
| Modifications for 20HP dynamo troubles, focusing on brushes and fuse wires. | 13th Oct 1923 | Box 50 \ 5 Scan239 | |
| Issues with the brush spring contact in the 20 HP Brush & Commutator System, suggesting an increase in the slot width. | 15th Oct 1923 | Box 50 \ 5 Scan240 | |
| Requesting the results of tests on different makes and types of carbon for dynamo brushes. | 18th Oct 1923 | Box 50 \ 5 Scan241 | |
| Summary of test results for Goshawk dynamo brushes made from various materials. | 20th Oct 1923 | Box 50 \ 5 Scan242 | |
| Comparative tests of Goshawk dynamo brushes made from various materials. | 22th Oct 1923 | Box 50 \ 5 Scan243 | |
| Test report on the performance and wear of 'Le Carbone' and 'Morganite' commutator brushes. | 22th Oct 1923 | Box 50 \ 5 Scan244 | |
| The performance and wear characteristics of various commutator brushes. | 22th Oct 1923 | Box 50 \ 5 Scan245 | |
| Test results and wear measurements for various types of motor brushes, including a tabulated summary. | 22th Oct 1923 | Box 50 \ 5 Scan246 | |
| Report comparing the performance of different brush materials and undercutting methods for commutators. | 22th Oct 1923 | Box 50 \ 5 Scan247 | |
| Test results on Morganite EGO material for Goshawk dynamo brushes as an alternative source of supply. | 24th Oct 1923 | Box 50 \ 5 Scan248 | |
| Requesting justification for the standardization of Goshawk timing brushes. | 26th Oct 1923 | Box 50 \ 5 Scan249 | |
| Confirming the transfer of Goshawk II brush springs for dynamos. | 30th Oct 1923 | Box 50 \ 5 Scan250 | |
| Instructions regarding modified Goshawk dynamo springs. | 5th Nov 1923 | Box 50 \ 5 Scan251 | |
| Instructions regarding bevelled brushes and control spring pressure. | 6th Nov 1918 | Box 50 \ 5 Scan252 | |
| Request for modification and further testing of a Goshawk brush and commutator system. | 30th Oct 1923 | Box 50 \ 5 Scan253 | |
| Fault with a Goshawk Dynamo Armature due to an incorrect drop test. | 11th Nov 1923 | Box 50 \ 5 Scan254 | |
| Experimental work in progress on Goshawk dynamos to reduce noise and improve commutation. | 11th Nov 1923 | Box 50 \ 5 Scan255 | |
| The testing of bevelling brushes and undercutting the commutator for experimental Goshawk cars. | 11th Nov 1923 | Box 50 \ 5 Scan256 | |
| Experiments with Lucas E.575 machines, focusing on brush wear, armature design, and dynamo noise reduction. | 11th Nov 1923 | Box 50 \ 5 Scan257 | |
| On investigations into dynamo noise, linking it to bearing tightness and the use of cast iron end brackets. | 11th Nov 1923 | Box 50 \ 5 Scan258 | |
| Fault with a Goshawk Dynamo Armature caused by copper cuttings. | 1st Nov 1923 | Box 50 \ 5 Scan259 | |
| Instruction detailing new brush spring pressures for the Goshawk dynamo. | 11th Nov 1923 | Box 50 \ 5 Scan260 | |
| Expressing disappointment with the slow progress on the Goshawk Dynamo and suggesting improvements. | 12th Nov 1923 | Box 50 \ 5 Scan261 | |
| Comparative test report on the Goshawk dynamo brush gear. | 13th Nov 1923 | Box 50 \ 5 Scan262 | |
| Test comparing performance and wear of Z brushes on a Goshawk Dynamo. | 13th Nov 1923 | Box 50 \ 5 Scan263 | |
| The examination of Dynamo No. 197, identifying projecting micas as the cause of burnt commutator bars and requesting reconditioning. | 13th Nov 1923 | Box 50 \ 5 Scan264 | |
| Improvements for the Goshawk Dynamos, including changes to brushes, springs, and commutators. | 11th Nov 1923 | Box 50 \ 5 Scan265 | |
| The performance and resistance of various generator carbon brushes. | 14th Nov 1923 | Box 50 \ 5 Scan266 | |
| Improvements in dynamo commutation and noise. | 14th Nov 1923 | Box 50 \ 5 Scan267 | |
| Follow-up query regarding an increase in the width of the brush slot for the Goshawk Brush Gear. | 16th Nov 1923 | Box 50 \ 5 Scan268 | |
| Design query regarding the slot on the 20 HP Dynamo Brush Gear. | 17th Nov 1923 | Box 50 \ 5 Scan269 | |
| Results of a Goshawk dynamo brush gear test with heavier spring pressure. | 21th Nov 1923 | Box 50 \ 5 Scan270 | |
| Test report on Goshawk Z brushes with increased spring pressure on dynamo 288. | 20th Nov 1923 | Box 50 \ 5 Scan271 | |
| Notification regarding the receipt of Goshawk dynamo brushes. | 29th Nov 1923 | Box 50 \ 5 Scan272 | |
| Goshawk dynamo brush tests, comparing the wear of different Morganite brush materials. | 10th Dec 1923 | Box 50 \ 5 Scan273 | |
| Test result summary comparing EGO and EG2 brushes against the standard Z brushes. | 10th Dec 1923 | Box 50 \ 5 Scan274 | |
| Repeat tests of EGO and EG2 Morganite brushes on a Goshawk dynamo. | 7th Dec 1923 | Box 50 \ 5 Scan275 | |
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