| Description | Date | Identifier | |
| The condition of Dynamo D and E6Z brushes after a 10,000-mile test run on a car. | 30th Sep 1925 | Box 50 \ 5 Scan376 | |
| Inspection report for a returned Dynamo D after being replaced on a chassis. | 14th Oct 1925 | Box 50 \ 5 Scan377 | |
| Instructions detailing wear measurements after 10,000 miles and observations on armature end-play. | 29th Jun 1920 | Box 50 \ 5 Scan378 | |
| Incorrect brush clearance on Goshawk Commutator & Brush Systems. | 28th Sep 1925 | Box 50 \ 5 Scan379 | |
| Specifying the minimum and maximum brush clearances for 20 HP and EAC components. | 28th Sep 1925 | Box 50 \ 5 Scan380 | |
| Test on the effects of over voltage on a 20 HP dynamo. | 23th Oct 1925 | Box 50 \ 5 Scan381 | |
| Brush and commutator tests conducted on 20 HP dynamos. | 26th Oct 1925 | Box 50 \ 5 Scan382 | |
| Test report on Morganite EG2 dynamo brushes as a second source of supply. | 29th Oct 1925 | Box 50 \ 5 Scan383 | |
| Page regarding the standardization of brushes for second string purposes. | 29th Oct 1925 | Box 50 \ 5 Scan384 | |
| Instruction sheet detailing a dynamo fault where solder was thrown from the commutator for the first time on a car with a cartridge field fuse. | 2nd Nov 1925 | Box 50 \ 5 Scan385 | |
| Test reports for alternative brushes on 20 HP dynamos and the viability of further testing. | 1st Nov 1925 | Box 50 \ 5 Scan386 | |
| The standardisation and stock management of brushes for the 20 HP Dynamo. | 6th Nov 1925 | Box 50 \ 5 Scan387 | |
| Instruction sheet comparing the performance of X, EG3399, and Z grade dynamo brushes. | 12th Nov 1925 | Box 50 \ 5 Scan388 | |
| Note concluding that further testing on LeCarbone Co. brushes is unnecessary as they are not an English product. | 29th Sep 1920 | Box 50 \ 5 Scan389 | |
| Instruction sheet detailing a repeat test on X and EG3399 brushes, noting sparking, wear, and commutator segment condition. | 10th Nov 1924 | Box 50 \ 5 Scan390 | |
| Prolonged tests of Le Carbone dynamo brushes, concluding the new combination offers no advantage and is more expensive. | 30th Nov 1925 | Box 50 \ 5 Scan391 | |
| Test report on main and control brushes for a 20hp dynamo. | 30th Sep 1924 | Box 50 \ 5 Scan392 | |
| Cross-reference note for correspondence on the Goshawk III brush and commutator system. | 30th Sep 1924 | Box 50 \ 5 Scan393 | |
| Sending of prints for Goshawk I & II starter motor and dynamo components. | 16th Mar 1921 | Box 51 \ 1 Scan001 | |
| Extract from a report on electrical matters regarding a visit to Messrs. Wormald & Hives and the Goshawk II dynamo. | 19th Mar 1921 | Box 51 \ 1 Scan002 | |
| Feasibility of in-house production of starter motors and dynamos for the 'Goshawk II'. | 5th Apr 1921 | Box 51 \ 1 Scan003 | |
| Adapting and testing third-party electrical equipment (starter motors, dynamo) for the Goshawk II engine. | 6th Apr 1921 | Box 51 \ 1 Scan004 | |
| Methods for creating silent dynamos, with specific reference to the Rotax model. | 27th Apr 1921 | Box 51 \ 1 Scan005 | |
| Gearing for the 'Goshawk II' car and specifications for its dynamo. | 27th Apr 1921 | Box 51 \ 1 Scan006 | |
| Issuance of three blueprints for the 'N' Scheme 850 - Dynamo for Goshawk II. | 2nd May 1921 | Box 51 \ 1 Scan007 | |
| The design specifications for the Goshawk II dynamo and starter motor. | 9th May 1921 | Box 51 \ 1 Scan008 | |
| Arranging a meeting in London/Abingdon to collect particulars on Goshawk II dynamo and starter motor windings. | 18th May 1921 | Box 51 \ 1 Scan009 | |
| Preliminary calculations for the Goshawk II dynamo. | 1st Jun 1921 | Box 51 \ 1 Scan010 | |
| Continuation of a report on machine specifications, including field winding and armature design. | 1st Jun 1921 | Box 51 \ 1 Scan011 | |
| Awaiting sketches for Dynamo & Starter motors for the Goshawk I and II engines. | 7th Jun 1921 | Box 51 \ 1 Scan012 | |
| Sending drawing Lec.1405 for Dynamos & Motors for the 'Goshawk I & II' and 40 HP. Chassis. | 9th Jun 1921 | Box 51 \ 1 Scan013 | |
| From 'E' to 'EFC' regarding particulars for the 'Goshawk II' dynamo and motor, conveying Mr. Royce's concerns. | 23th Jun 1921 | Box 51 \ 1 Scan014 | |
| Calculations for the 'Goshawk II' Dynamo in collaboration with Mr. Thacker. | 16th Jul 1921 | Box 51 \ 1 Scan015 | |
| Specifications and investigations for the 'Goshawk II' Dynamo. | 6th Jul 1921 | Box 51 \ 1 Scan016 | |
| Calculations for determining the specifications and resistance of an armature winding. | 6th Jul 1921 | Box 51 \ 1 Scan017 | |
| Calculations for armature and brush resistance at a specified operating temperature. | 6th Jul 1921 | Box 51 \ 1 Scan018 | |
| Calculation table for the ampere-turns required to produce a specific magnetic flux in an electrical machine. | 6th Jul 1921 | Box 51 \ 1 Scan019 | |
| Page of calculations for ampere turns, resistance, wire gauge, and number of turns for a coil. | 6th Jul 1921 | Box 51 \ 1 Scan020 | |
| Page of calculations for wire coil specifications including resistance, amperage, and voltage loss. | 6th Jul 1921 | Box 51 \ 1 Scan021 | |
| List of principal quantities and calculations for an electrical shunt machine. | 6th Jul 1921 | Box 51 \ 1 Scan022 | |
| Page of calculations for total armature amperes, loss of volts, and total armature E.M.F. | 17th Aug 1921 | Box 51 \ 1 Scan023 | |
| Specification for a dummy model armature for the 'Goshawk' II dynamo design. | 17th Aug 1921 | Box 51 \ 1 Scan024 | |
| Winding connections for a 4-pole motor armature with a diagram. | 17th Aug 1921 | Box 51 \ 1 Scan025 | |
| Request to the experimental department to create a dummy model armature for the 'Goshawk II' Motor and Dynamo. | 10th Aug 1921 | Box 51 \ 1 Scan026 | |
| Drawing for the 'Goshawk II' dynamo. | 1st Aug 1921 | Box 51 \ 1 Scan027 | |
| Instructions for producing two dummy model armatures for the 'Goshawk' II Dynamo & S.S. Motor. | 8th Aug 1921 | Box 51 \ 1 Scan028 | |
| Parts list for a Dynamo assembly, covering the Bearing Brackets and Brush Holders. | 9th Sep 1921 | Box 51 \ 1 Scan029 | |
| Part materials, manufacturing methods, and supplier coordination. | 16th Sep 1921 | Box 51 \ 1 Scan030 | |
| Confirming the dispatch of dummy armatures for the Goshawk dynamo and motor. | 23th Sep 1921 | Box 51 \ 1 Scan031 | |
| Instructing the despatch of dummy armatures for the 'Goshawk' dynamo and motor for inspection by Mr. Royce. | 23th Sep 1921 | Box 51 \ 1 Scan032 | |
| Responding to a query about the 'Goshawk II' dynamo, specifically the automatic cutout switch and terminals. | 3rd Oct 1921 | Box 51 \ 1 Scan033 | |
| The relocation of the dynamo cutout on the Goshawk model. | 8th Oct 1921 | Box 51 \ 1 Scan034 | |
| Modifications and improvements for dynamo and motor armature windings. | 10th Oct 1921 | Box 51 \ 1 Scan035 | |
| From EFC to Ey regarding a note from Mr. Royce on Goshawk dynamo and starter motor armature windings. | 13th Oct 1921 | Box 51 \ 1 Scan036 | |
| Recommendation to modify the generator fixing on the Goshawk 11 engine to prevent pinion wear. | 28th Oct 1921 | Box 51 \ 1 Scan037 | |
| Production delays and material choices for the Goshawk electrical equipment, specifically the starter motor commutator. | 9th Nov 1921 | Box 51 \ 1 Scan038 | |
| Production and interchangeability issues with the dynamo mounting on the Goshawk II engine. | 14th Nov 1931 | Box 51 \ 1 Scan039 | |
| Selection of dynamos for the 'Goshawk II' model, comparing them to Lucas S.F. and C.A.V. models. | 16th Nov 1921 | Box 51 \ 1 Scan040 | |
| The progress and challenges with electrical components for the 'Goshawk II' project, including material sourcing. | 21th Nov 1921 | Box 51 \ 1 Scan041 | |
| Extract from a report on a visit to West Wittering regarding the Goshawk II, discussing dynamos and chassis wiring. | 25th Nov 1921 | Box 51 \ 1 Scan042 | |
| Arrangement of the Goshawk dynamo terminals and proposing a cover to prevent short circuits. | 12th Dec 1921 | Box 51 \ 1 Scan043 | |
| List of parts and instructions for the experimental 'Goshawk' 11 R.R. Dynamo Armature. | 13th Dec 1921 | Box 51 \ 1 Scan044 | |
| Experimental memo detailing component changes and instructions for a dynamo, commutator, and field winding. | 1st Dec 1921 | Box 51 \ 1 Scan045 | |
| Modifications to the dynamo and starter motor drives for the Goshawk 11 and 40/50 models. | 15th Dec 1921 | Box 51 \ 1 Scan046 | |
| Unsatisfactory drives and recommending magnetic operating for a 40/50 modified engine. | 15th Dec 1921 | Box 51 \ 1 Scan047 | |
| Technical memo concerning modifications to the dynamo, switchbox, and distributing board for the Goshawk Competition. | 29th Dec 1921 | Box 51 \ 1 Scan048 | |
| Extract concerning a visit to West Wittering regarding the Goshawk II dynamo. | 30th Dec 1921 | Box 51 \ 1 Scan049 | |
| Electric starter options for the Goshhawk II engine following a visit to West Wittering. | 30th Dec 1921 | Box 51 \ 1 Scan050 | |
| Missing blueprints and additional parts for the 'Goshawk' 11 R.R. Dynamo Frame and Field Winding. | 13th Jan 1922 | Box 51 \ 1 Scan051 | |
| Revised lubrication scheme for the Goshawk 11 dynamo bearings. | 28th May 1935 | Box 51 \ 1 Scan052 | |
| Notification of a revised winding diagram for the 'Goshawk' 11 dynamo. | 2nd Feb 1922 | Box 51 \ 1 Scan053 | |
| Confirming the return of a dynamo under separate cover. | 2nd Feb 1922 | Box 51 \ 1 Scan054 | |
| The testing and modification of the Goshawk Dynamo No. A, detailing issues with its commutator and output. | 7th Mar 1922 | Box 51 \ 1 Scan055 | |
| From EFC to Mr. Brock requesting the weights of various components for the Goshawk Dynamo and Motor. | 10th Mar 1922 | Box 51 \ 1 Scan056 | |
| Revision to the winding diagram for the 'Goshawk' 11 Dynamo. | 3rd Mar 1922 | Box 51 \ 1 Scan057 | |
| List of dynamos, motors, and batteries fitted to various Goshawk II chassis. | 15th Mar 1922 | Box 51 \ 1 Scan058 | |
| Performance tests of the Goshawk dynamo, focusing on the benefits of using a narrow control brush. | 7th Apr 1922 | Box 51 \ 1 Scan059 | |
| Extract from a report discussing dynamo brushes, comparing Le Carbone, Morganite, and Bijur types. | 12th Apr 1922 | Box 51 \ 1 Scan060 | |
| Outlining points for attention regarding the design and manufacture of the Goshawk dynamo. | 21th Apr 1922 | Box 51 \ 1 Scan061 | |
| Issues and improvements for motor brush holders and insulation. | 21th Apr 1922 | Box 51 \ 1 Scan062 | |
| Instructions on the modification of a control brush holder by thinning it down to retard the new brush's centre line. | 25th Apr 1922 | Box 51 \ 1 Scan063 | |
| Extract detailing dynamo failures and brush issues on the Goshawk II. | 25th Apr 1922 | Box 51 \ 1 Scan064 | |
| Table detailing the dynamo, motor, and battery specifications for various Goshawk chassis models. | 26th Apr 1922 | Box 51 \ 1 Scan065 | |
| Telegram reporting a dynamo failure and battery issues. | 2nd May 1922 | Box 51 \ 1 Scan066 | |
| Instructing the stores to urgently send a Goshawk generator to a customer in France via aeroplane. | 5th May 1922 | Box 51 \ 1 Scan067 | |
| Revised winding diagram and control brush for the Goshawk II dynamo design. | 3rd May 1922 | Box 51 \ 1 Scan068 | |
| Dynamo failures due to incorrect brushes and commutator issues, with a proposed solution. | 8th May 1922 | Box 51 \ 1 Scan069 | |
| Agreeing to the width of the control brush on the Goshawk dynamo. | 30th May 1922 | Box 51 \ 1 Scan070 | |
| To Mr. Birkett recommending a temporary measure for an oiling issue with the generator on a Goshawk Limousine. | 1st Jun 1922 | Box 51 \ 1 Scan071 | |
| Proposal outlining the treatment of Goshawk II dynamo end covers for different chassis configurations. | 11th May 1922 | Box 51 \ 1 Scan072 | |
| Inspection of dynamo brushes and a proposed modification for clamping the cover. | 11th May 1922 | Box 51 \ 1 Scan073 | |
| Modifications to the Goshawk II Dynamo brushes and field connections. | 11th May 1922 | Box 51 \ 1 Scan074 | |
| Recurring commutator failures in a Goshawk II car dynamo and the dispatch of replacement parts. | 17th May 1922 | Box 51 \ 1 Scan075 | |
| Solder melting issues with the dynamo commutator on Lucas Generators fitted to early Goshawk cars. | 24th May 1922 | Box 51 \ 1 Scan076 | |
| Modifications to the Goshawk II dynamo field connections and brush holder insulation. | 27th May 1922 | Box 51 \ 1 Scan077 | |
| Production delay for the 4-Goshawk-11 dynamo due to ongoing experiments on commutators. | 3rd Jul 1922 | Box 51 \ 1 Scan078 | |
| Instructing that no bakelite commutators should remain on any dynamo. | 7th Jul 1922 | Box 51 \ 1 Scan079 | |
| Modifications to the armature winding of a Goshawk 11 generator. | 11th Jul 1922 | Box 51 \ 1 Scan080 | |
| Requesting various parts for a No.4 Goshawk including a dynamo, ignition plugs and tyre pump components. | 12th Jul 1922 | Box 51 \ 1 Scan081 | |
| Test results for a first R.R. Goshawk dynamo with a narrow control brush. | 13th Jul 1922 | Box 51 \ 1 Scan082 | |
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