| Description | Date | Identifier | |
| The specifications and adjustments for a 20 HP Dynamo. | 8th Apr 1927 | Box 165 \ 6 img078 | |
| Chassis 10-GIII after a 10,000-mile test in France, detailing dynamo performance. | 10th May 1927 | Box 165 \ 6 img079 | |
| Feasibility of using 57 grooves in a car dynamo's armature. | 16th May 1927 | Box 165 \ 6 img080 | |
| Instruction for swapping a dynamo and armature between different chassis. | 26th May 1927 | Box 165 \ 6 img081 | |
| Extract discussing the experimental status of N.B. machines and the testing of 28-slot armatures for 20 HP dynamos. | 4th Jun 1927 | Box 165 \ 6 img082 | |
| Proposal regarding brush spring pressures for the 20 HP chassis, suggesting standardization of parts for production convenience. | 11th Apr 1927 | Box 165 \ 6 img083 | |
| Use of a common spring for intermediate poundage on main and control brushes. | 1st Jun 1927 | Box 165 \ 6 img084 | |
| Standardisation of a 20 HP Dynamo 28 slot armature to improve running silence. | 28th May 1927 | Box 165 \ 6 img085 | |
| Standardisation document for chassis parts detailing the testing and costs of a new part. | 8th Oct 1927 | Box 165 \ 6 img086 | |
| Standardisation of the 28 slot armature for the 20 HP dynamo. | 21th Jun 1927 | Box 165 \ 6 img087 | |
| Letter from Le Carbone providing characteristics for dynamo brushes of grade 'EG3417' for comparison. | 27th Jun 1927 | Box 165 \ 6 img088 | |
| Comparison of physical properties for material grades 'Z' and 'EG3417'. | 27th Jun 1927 | Box 165 \ 6 img089 | |
| Inspection report on a 20hp 28-slot dynamo after 12,000 miles of use in France. | 11th Jul 1927 | Box 165 \ 6 img090 | |
| Inspection report on an over-lubricated machine, detailing the condition of its brushes and commutator. | 29th Sep 1930 | Box 165 \ 6 img091 | |
| Instruction sheet noting a drop in dynamo output amperage and a loose field terminal. | 12th Aug 1927 | Box 165 \ 6 img092 | |
| Production check for a 20 HP machine with a new 28 slot armature. | 12th Aug 1927 | Box 165 \ 6 img093 | |
| Comparative tests of dynamo brushes for a 20 HP dynamo. | 18th Aug 1927 | Box 165 \ 6 img094 | |
| Test report comparing the wear and performance of various brush grades, with detailed measurements. | 18th Aug 1927 | Box 165 \ 6 img095 | |
| Report comparing the performance and characteristics of two different dynamo brush grades, 'Z' and 'G3417'. | 18th Aug 1927 | Box 165 \ 6 img096 | |
| The performance, wear, and noise of various brush grades compared to standard and continental types. | 18th Aug 1927 | Box 165 \ 6 img097 | |
| Continued report on the standardisation of the 40/50 dynamo and associated brush tests. | 18th Aug 1927 | Box 165 \ 6 img098 | |
| Clarifying the production inspection and test specifications for a 20 HP Dynamo with a 28 slot armature. | 30th Aug 1927 | Box 165 \ 6 img099 | |
| On the examination of a 20 HP Production Dynamo F.9V, noting an issue with the magneto drive cover. | 6th Sep 1927 | Box 165 \ 6 img100 | |
| Requesting experimental tests on a 28 slot armature for a 20 HP dynamo without central banding. | 1st Sep 1927 | Box 165 \ 6 img101 | |
| Instructions and test results for a 30 hp Dynamo with a 28 Slot Armature. | 16th Sep 1927 | Box 165 \ 6 img102 | |
| Instructions detailing the testing of various dynamo armatures to evaluate performance and noise levels. | 29th Jun 1920 | Box 165 \ 6 img103 | |
| Experimental tests of a dynamo armature and main brush retard settings. | 11th Jul 1927 | Box 165 \ 6 img104 | |
| Report detailing temperature and performance test results for various machines. | 29th Aug 1920 | Box 165 \ 6 img105 | |
| Batch of 25 machines, comparing their commutation to a 29 slot 57 segment type. | 29th Jun 1920 | Box 165 \ 6 img106 | |
| Performance graph showing the output curves for a 20 HP dynamo. | 14th Apr 1927 | Box 165 \ 6 img107 | |
| Blueprint graph showing the output curve of a 20 HP Dynamo. | 16th Sep 1927 | Box 165 \ 6 img108 | |
| The standardization and testing of 28 slot armatures for 20 HP and 40/50 HP dynamos to resolve noise issues. | 1st Nov 1927 | Box 165 \ 6 img109 | |
| Continued report on experimental N.B. machines, discussing the curing of noise trouble and improvements in heating. | 31th Dec 1927 | Box 165 \ 6 img110 | |
| Instructions and test results for a 28 Slot Dynamo on General Specification. | 31th Dec 1927 | Box 165 \ 6 img111 | |
| Comparing the performance and weight of a 38-slot machine against an old standard 57-segment machine. | 29th Jun 1920 | Box 165 \ 6 img112 | |
| Standardisation of solid pole pieces for the 20 HP dynamo to reduce production costs. | 14th Dec 1926 | Box 165 \ 6 img113 | |
| Implementation of two standardisation sheets regarding dynamo pole pieces and battery box holding for the 20 HP chassis. | 14th Jan 1927 | Box 165 \ 6 img114 | |
| The investigation of noisy 20 HP dynamos and the proposal to renew their bearings to reduce noise. | 19th Jan 1927 | Box 165 \ 6 img115 | |
| Delay in borrowing dynamos from the Test Department for checking machines with pole modifications. | 28th Jan 1927 | Box 165 \ 6 img116 | |
| Delay of 20 HP dynamo noise tests pending the return of specific dynamos. | 2nd Feb 1927 | Box 165 \ 6 img117 | |
| Test report on a P.2.KM. dynamo with a single modification, detailing necessary adjustments to the control brush angle for production. | 2nd Feb 1927 | Box 165 \ 6 img118 | |
| Addendum regarding a modification to the control brush angle of a P.2.M. Dynamo. | 2nd Feb 1927 | Box 165 \ 6 img119 | |
| Circulating inspection sheets for a faulty 20 HP Dynamo. | 17th Feb 1927 | Box 165 \ 6 img120 | |
| Inspection instructions for a 20 HP dynamo, focusing on faulty output and commutation. | 14th Feb 1927 | Box 165 \ 6 img121 | |
| On modifying a 20HP dynamo's brush position to correct its output curve. | 2nd Jun 1926 | Box 165 \ 6 img122 | |
| The rejection of a modified 20 HP dynamo due to noise and output curve issues. | 8th Mar 1927 | Box 165 \ 6 img123 | |
| Re-testing results of a 20 HP dynamo with pole modification and issues with noisy machines. | 17th Mar 1927 | Box 165 \ 6 img124 | |
| Production testing and performance of a 20 HP Dynamo with pole modifications. | 21th Mar 1927 | Box 165 \ 6 img125 | |
| Finding a solution for noisy dynamos by experimenting with a new armature design. | 22th Mar 1927 | Box 165 \ 6 img126 | |
| Investigation into noisy 30 HP dynamos rejected by the Repair Department after overhaul. | 22th Mar 1927 | Box 165 \ 6 img127 | |
| Investigations into armature hum, comparing 57 coil, 29 coil, and 28 slot armatures. | 29th Jun 1920 | Box 165 \ 6 img128 | |
| Inspection notes on the performance of armatures after fitting new bearings. | 29th Jun 1920 | Box 165 \ 6 img129 | |
| Instruction sheet detailing an investigation into a humming noise in a machine by testing different armatures and bearings. | 29th Jun 1920 | Box 165 \ 6 img130 | |
| Investigating noise characteristics in machines, referencing static drag and armature design. | 29th Jun 1920 | Box 165 \ 6 img131 | |
| Investigating a humming noise in a machine, considering slack bearings and component accuracy as potential causes. | 29th Jun 1920 | Box 165 \ 6 img132 | |
| Instruction sheet detailing an investigation into machine noise and proposing modifications to armature slots and pole edges. | 29th Jun 1926 | Box 165 \ 6 img133 | |
| Modification to a 20 HP dynamo to reduce noise by altering its pole pieces. | 24th Mar 1927 | Box 165 \ 6 img134 | |
| Clarifying a misunderstanding about the noise levels of a modified 20-HP Dynamo P.6. KM. | 25th Mar 1927 | Box 165 \ 6 img135 | |
| Modifications and testing of noisy 20 HP and 40/50 HP dynamos. | 25th Mar 1927 | Box 165 \ 6 img136 | |
| Production of tools, armatures, and dynamos for 20 HP and 40/50 HP models. | 25th Mar 1927 | Box 165 \ 6 img137 | |
| From the Test Department regarding the receipt of three modified dynamos. | 29th Mar 1927 | Box 165 \ 6 img138 | |
| Performance variations, modifications, and testing for 20 HP and 40/50 HP dynamos. | 29th Mar 1927 | Box 165 \ 6 img139 | |
| Continuation sheet regarding the confirmation of the silence quality of armatures. | 30th Mar 1927 | Box 165 \ 6 img140 | |
| The examination and testing of a 20 HP Production Dynamo A3Z, noting a minor deviation in commutator settings. | 30th Mar 1927 | Box 165 \ 6 img141 | |
| Performance issues and test results of a modified 20 HP dynamo. | 5th Apr 1927 | Box 165 \ 6 img142 | |
| Chasing the return of a modified L.70 dynamo for pole piece staggering. | 12th Apr 1927 | Box 165 \ 6 img143 | |
| Diagrammatic wiring views for 20 HP and 40/50 HP dynamos from the commutator end. | 23th May 1927 | Box 165 \ 6 img144 | |
| Requesting to fit a standard 20 HP dynamo with special Le Carbone brushes to chassis 11-G3. | 23th Apr 1927 | Box 165 \ 6 img145 | |
| Change to the monthly dynamo production programme. | 24th May 1927 | Box 165 \ 6 img146 | |
| Chassis dynamo test where temperature sentinels melted, indicating a high operating temperature during a 10,000-mile trial. | 26th May 1927 | Box 165 \ 6 img147 | |
| Standardisation table for motors and dynamos, specifying the use of solid poles versus punched plates. | 27th May 1927 | Box 165 \ 6 img148 | |
| Graph showing the output curve and requirements for a 20 HP Dynamo. | 1st Oct 1929 | Box 165 \ 6 img149 | |
| Testing a 20HP dynamo, suggesting a slight advance of the control brush to reduce high output. | 30th May 1927 | Box 165 \ 6 img150 | |
| Modifications to address noise issues in 20 HP and 40/50 HP dynamos. | 30th May 1927 | Box 165 \ 6 img151 | |
| Number of production dynamos received and modified during a specific week. | 30th May 1927 | Box 165 \ 6 img152 | |
| Proposal to modify a 20 HP dynamo armature with steel wedges to reduce noise. | 9th Jun 1927 | Box 165 \ 6 img153 | |
| To Mr. Brock from EFC regarding the status of a monthly production Dynamo FV.95. | 27th Jun 1927 | Box 165 \ 6 img154 | |
| Performance comparison of dynamos on single modification 20 HP machines. | 1st Apr 1927 | Box 165 \ 6 img155 | |
| Performance comparison table of dynamos for single modification 20 HP machines. | 1st Apr 1927 | Box 165 \ 6 img156 | |
| Performance comparison log for dynamos on 20 HP machines. | 1st Apr 1927 | Box 165 \ 6 img157 | |
| Dynamo output and voltage performance graph for a 20 HP model. | 11th Feb 1925 | Box 165 \ 6 img158 | |
| Instructions regarding the testing and performance of 87° and 97° sentinels on a 20 hp dynamo. | 31th Oct 1927 | Box 165 \ 6 img159 | |
| The performance and failure of dynamo sentinel components over various distances. | 29th Jun 1920 | Box 165 \ 6 img160 | |
| Instructions on the temperature performance and safety of a 97°C sentinel on a 30hp machine. | 20th Jun 1920 | Box 165 \ 6 img161 | |
| Use and performance of fusible sentinels on 20 HP and 40/50 HP dynamos. | 10th Nov 1927 | Box 165 \ 6 img162 | |
| Experimental record sheet for 20hp Dynamo temperature sentinels. | 22th Oct 1927 | Box 165 \ 6 img163 | |
| Test data and remarks for a 20 HP Dynamo, model 931, with EJB poles. | 18th Apr 1928 | Box 165 \ 6 img164 | |
| Letter discussing modifications to dynamo and switch schemes, and a 10,000-mile test. | 17th Mar 1928 | Box 165 \ 6 img165 | |
| Implementation of a 'green lamp scheme' versus an 'auto switch' system. | 2nd Mar 1928 | Box 165 \ 6 img166 | |
| Diagrammatic wiring views of dynamos for 20 HP and 40/50 HP engines from the commutator end. | 2nd Mar 1928 | Box 165 \ 6 img167 | |
| Instruction sheet for the return of a GII Dynamo for a monthly test. | 22th Mar 1928 | Box 165 \ 6 img168 | |
| Production inspection report for a 20 HP Dynamo C.4.Z, detailing an issue with brush clearance. | 30th Mar 1928 | Box 165 \ 6 img169 | |
| Reporting on the examination of a 20 HP Monthly Production Dynamo X9F, noting a tight bearing causing stiffness. | 26th May 1928 | Box 165 \ 6 img170 | |
| Test report on the performance of dynamo brushes after 10,000 miles of road use. | 6th Jun 1928 | Box 165 \ 6 img171 | |
| Faulty 20 HP dynamo carcase with incorrectly sized pole pieces. | 11th Jun 1928 | Box 165 \ 6 img172 | |
| Defective 20 HP dynamo bearing causing a rattle and a request for its replacement. | 16th Jun 1928 | Box 165 \ 6 img173 | |
| To Mr. Brock regarding the expectation of receiving a 20 HP production dynamo for a monthly test. | 18th Sep 1928 | Box 165 \ 6 img174 | |
| 10,000-mile test of dynamo brushes for a 20 HP vehicle. | 14th Sep 1928 | Box 165 \ 6 img175 | |
| Test report on the performance and wear of brushes compared to standard grades. | 8th Dec 1924 | Box 165 \ 6 img176 | |
| List of various grades of brushes for testing, including standard narrow and 20 HP twin types. | 19th Sep 1928 | Box 165 \ 6 img177 | |
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