| Description | Date | Identifier | |
| Performance graph plotting Brake Horsepower (B.HP) and RPM against Torque. | 28th May 1910 | Box 165 \ 7 img024 | |
| The results of C.60 cold start tests and suggesting a modified starter. | 28th May 1910 | Box 165 \ 7 img025 | |
| Gear operated from a 24V supply. | 28th May 1910 | Box 165 \ 7 img026 | |
| Calculations for starting a B60 engine at 0°F. | 28th May 1910 | Box 165 \ 7 img027 | |
| Performance and efficiency calculations for a Lucas M45G motor. | 28th May 1910 | Box 165 \ 7 img028 | |
| Cold start tests for a C6 Oil Engine using SAE10 lubricating oil. | 28th May 1910 | Box 165 \ 7 img029 | |
| Engine cold start performance data at -28°F and -30°F, with and without fuel dilution, and proposed gearing changes. | 1st Apr 1947 | Box 165 \ 7 img030 | |
| Performance curve graph for a starter motor and drive with a 110 AH battery. | 1st Apr 1947 | Box 165 \ 7 img031 | |
| Performance characteristics graph for a 12 Volt CAV S-Motor. | 1st Apr 1947 | Box 165 \ 7 img032 | |
| Performance graph for a 12 Volt CAV Starter Motor, Serial No 46260. | 1st Apr 1947 | Box 165 \ 7 img033 | |
| Photograph showing the wear on a flywheel's gear teeth after 25,000 starts. | 20th Jan 1950 | Box 165 \ 7 img034 | |
| The Lucas Electrical Helix Type Starter motor for use on B.40 engines. | 20th Jan 1950 | Box 165 \ 7 img035 | |
| Description of the operation of a multiplate friction clutch and its various disengagement mechanisms. | 20th Jan 1950 | Box 165 \ 7 img036 | |
| History of development report on Lucas Helix type motors, detailing test results and failures. | 20th Jan 1950 | Box 165 \ 7 img037 | |
| Test report on an improved motor unit after 30,000 starts and subsequent component examination. | 20th Jan 1950 | Box 165 \ 7 img038 | |
| Inspection and failure analysis report on various starter motor components. | 1st Jan 1950 | Box 165 \ 7 img039 | |
| The failure analysis of two Lucas starter motors, serial numbers 58 and 76. | 20th Jan 1950 | Box 165 \ 7 img040 | |
| The testing of two modified motors, detailing failures, diagnoses, and subsequent repairs. | 20th Jan 1950 | Box 165 \ 7 img041 | |
| The testing, faults, and modifications of a starter motor from supplier Lucas. | 20th Jan 1950 | Box 165 \ 7 img042 | |
| Report page detailing conclusions on component improvements and a list of outstanding faults. | 20th Jan 1950 | Box 165 \ 7 img043 | |
| Test report comparing sample carbon brushes from British Carbons Ltd. against the standard Morganite brushes. | 2nd Sep 1932 | Box 166 \ 1 img001 | |
| Test report on brushes, comparing their performance, wear, and cost against the standard. | 2nd Sep 1932 | Box 166 \ 1 img002 | |
| Testing and potential standardisation of starter motor and dynamo brushes supplied by British Carbons Limited. | 1st Sep 1932 | Box 166 \ 1 img003 | |
| Electrical experimental record sheet for British Carbon Brushes Grade B 40/50. | 23th Aug 1932 | Box 166 \ 1 img004 | |
| Requesting an order for various quantities and grades of British Commutator Brushes. | 3rd Oct 1932 | Box 166 \ 1 img005 | |
| Letter from The Morgan Crucible Company Ltd. regarding a schedule of qualities for electrical brushes. | 28th Sep 1932 | Box 166 \ 1 img006 | |
| Letter to British Carbons Ltd. requesting specifications for various grades of brushes received for testing. | 18th Oct 1932 | Box 166 \ 1 img007 | |
| Follow-up letter to British Carbons Ltd requesting a reply to a previous correspondence. | 1st Nov 1932 | Box 166 \ 1 img008 | |
| Letter from British Carbons enclosing full specifications for their products following tests. | 2nd Nov 1922 | Box 166 \ 1 img009 | |
| Summary of the physical properties for different grades of carbon products from British Carbons. | 2nd Nov 1922 | Box 166 \ 1 img010 | |
| Specification sheet for different grades of carbon brushes from British Carbons Limited. | 9th Nov 1932 | Box 166 \ 1 img011 | |
| Letter to British Carbons Ltd. requesting further information on special brushes sent for testing. | 9th Nov 1932 | Box 166 \ 1 img012 | |
| Request to order experimental Morganite carbon brushes for testing. | 9th Nov 1932 | Box 166 \ 1 img013 | |
| Letter from British Carbons Ltd providing particulars for carbon brush grades G.20 and G.7. | 10th Nov 1932 | Box 166 \ 1 img014 | |
| Internal memorandum requesting an order for various experimental grades of Morganite dynamo brushes. | 7th Feb 1933 | Box 166 \ 1 img015 | |
| Urgent memo seeking clarification on whether to standardize carbon brushes from British Carbons Ltd., pending information on their material composition. | 7th Mar 1933 | Box 166 \ 1 img016 | |
| Letter from British Carbons Ltd. regarding tests and the material composition of their brushes. | 6th Mar 1933 | Box 166 \ 1 img017 | |
| Letter regarding the testing of an experimental dynamo with a new grade of brushes on a Bensport vehicle. | 7th Mar 1933 | Box 166 \ 1 img018 | |
| Tests conducted to reduce excessive dynamo brush wear. | 8th Mar 1933 | Box 166 \ 1 img019 | |
| Order for Morganite Dynamo Brushes from the Morgan Crucible Co. | 8th Mar 1933 | Box 166 \ 1 img020 | |
| Internal memorandum regarding the standardization and sourcing of British Carbon Brushes. | 8th Mar 1933 | Box 166 \ 1 img021 | |
| Explaining the policy decision to switch dynamo brush suppliers from French to British. | 3rd Mar 1933 | Box 166 \ 1 img022 | |
| Suggesting the standardisation of the Morganite EGO grade brush for the 40/50 chassis. | 4th May 1933 | Box 166 \ 1 img023 | |
| The standardisation of Morganite EGO dynamo brushes for 20/25 and 40/50 models. | 24th May 1933 | Box 166 \ 1 img024 | |
| Standardisation of dynamo brushes of grade Morganite EG0 for the 20/25 dynamo. | 24th May 1933 | Box 166 \ 1 img025 | |
| Standardisation of chassis parts form for dynamo brushes to improve commutation and reduce wear. | 24th Feb 1933 | Box 166 \ 1 img026 | |
| Request to order one dozen dynamo brushes from the Morgan Crucible Co. | 10th Oct 1933 | Box 166 \ 1 img027 | |
| Urgent order for one dozen Morganite carbon brushes. | 7th Nov 1933 | Box 166 \ 1 img028 | |
| Order for Morganite dynamo brushes. | 7th Dec 1933 | Box 166 \ 1 img029 | |
| Meeting notes regarding a visit from Mr. Thompson of British Carbons Co. to discuss various brush grades. | 18th Dec 1933 | Box 166 \ 1 img030 | |
| Letter from British Carbons Ltd. regarding samples of carbon brushes to match a provided sample and a request for a specimen of a smaller brush. | 21th Dec 1923 | Box 166 \ 1 img031 | |
| Letter to The Morgan Crucible Company Ltd requesting a meeting to discuss a suitable grade of brush for a new car engine dynamo. | 27th Dec 1933 | Box 166 \ 1 img032 | |
| Letter to British Carbons Ltd. accompanying a requested sample brush. | 29th Dec 1933 | Box 166 \ 1 img033 | |
| Cover letter from The Morgan Crucible Company Ltd. enclosing a reprint of a communication. | 16th Jan 1934 | Box 166 \ 1 img034 | |
| Follow-up letter to The Morgan Crucible Company regarding the promised delivery of experimental morganite brushes for testing. | 13th Mar 1934 | Box 166 \ 1 img035 | |
| Letter from The Morgan Crucible Company Limited regarding experimental brushes. | 15th Mar 1934 | Box 166 \ 1 img036 | |
| From Morgan Crucible Company listing different types of Morganite brushes and their dimensions for trial. | 24th Mar 1934 | Box 166 \ 1 img037 | |
| Request to order four Morganite Brushes, grade CM3, to drawing DB496. | 24th Mar 1934 | Box 166 \ 1 img038 | |
| The purchase of carbon rods. | 6th Jun 1934 | Box 166 \ 1 img039 | |
| Sample 'SYN' carbon brushes for testing on a 20/25 shunt dynamo and a Bentley dynamo. | 28th Jun 1934 | Box 166 \ 1 img040 | |
| Dispatch of various carbon brushes to the WST. Exp. Dept. | 29th Aug 1934 | Box 166 \ 1 img041 | |
| Letter from The Morgan Crucible Company discussing the analysis and comparison of different brush samples. | 8th Dec 1934 | Box 166 \ 1 img042 | |
| Letter from The Morgan Crucible Company discussing the properties of Link CM5H and Link CM6, including their co-efficient of friction. | 8th Dec 1934 | Box 166 \ 1 img043 | |
| Letter to The Morgan Crucible Co. Ltd. regarding the ordering and testing of specific grades of brushes. | 10th Dec 1934 | Box 166 \ 1 img044 | |
| Internal memorandum requesting an order for various grades of Morganite brushes. | 10th Dec 1934 | Box 166 \ 1 img045 | |
| Letter to The Morgan Crucible Co. Ltd. to arrange a meeting about dynamo brushes and advising of a works closure. | 18th Dec 1934 | Box 166 \ 1 img046 | |
| Dynamo brush chattering caused by incorrectly oriented brush springs. | 21th Feb 1935 | Box 166 \ 1 img047 | |
| Request to order six standard 20/25 dynamo brushes of grade EG3 from Messrs. Morganite. | 25th Feb 1935 | Box 166 \ 1 img048 | |
| Blueprints and testing samples for 40/50 HP and Bentley dynamo and commutator brushes. | 7th Mar 1935 | Box 166 \ 1 img049 | |
| Requesting the modification of two 40/50 dynamo brush holders to test larger brushes on the Spectre dynamo. | 12th Mar 1935 | Box 166 \ 1 img050 | |
| Order request for six Morganite Dynamo Brushes from the Morganite Crucible Co. | 12th Mar 1935 | Box 166 \ 1 img051 | |
| Requesting the testing of sample Carbon Brushes from Le Carbone Ltd. | 29th Mar 1935 | Box 166 \ 1 img052 | |
| Standardisation of parts for Morganite Ego brushes on the dynamo. | 22th Feb 1935 | Box 166 \ 1 img053 | |
| Statement on the nil cost for extra jigs and tools to bring the 'F' series chassis into production. | 12th Mar 1935 | Box 166 \ 1 img054 | |
| Standardisation of Morganite Ego brushes on the dynamo. | 22th Mar 1935 | Box 166 \ 1 img055 | |
| Standardization of parts document detailing the cost of extra jigs and tools for production on the U2 series chassis. | 28th Mar 1935 | Box 166 \ 1 img056 | |
| Private memo discussing an increase in dynamo troubles on the 3.5-litre Bentley, due to carbon deposits from the brush gear. | 19th Aug 1935 | Box 166 \ 1 img057 | |
| Letter from Le Carbone Ltd. regarding the supply of trial brushes for lighting set dynamos. | 5th Sep 1935 | Box 166 \ 1 img058 | |
| Letter from Synthetic Carbon & Engineering Co. Ltd. regarding trial brushes and enclosing previous correspondence. | 17th Sep 1935 | Box 166 \ 1 img059 | |
| Advertisement for 'SYN' Carbon Brushes, listing their applications and the manufacturer's contact details. | 17th Sep 1935 | Box 166 \ 1 img060 | |
| Data sheet for 'SYN' carbon brush grades and their applications, from the Synthetic Carbon & Engineering Company, Ltd. | 17th Sep 1935 | Box 166 \ 1 img061 | |
| Advertisement for 'Syn' brush holders and carbon brushes from the Synthetic Carbon & Engineering Company, Ltd. | 17th Sep 1935 | Box 166 \ 1 img062 | |
| Advertisement for 'SYN' brand copper contact parts from the Synthetic Carbon & Engineering Company, Ltd. | 24th Jun 1935 | Box 166 \ 1 img063 | |
| Delivery note from Synthetic Carbon & Engineering Co. for various carbon brushes. | 24th Jun 1935 | Box 166 \ 1 img064 | |
| Letter commenting on trials of carbon brushes for small car generators and recommending further tests with new grades. | 7th Jun 1935 | Box 166 \ 1 img065 | |
| Letter from Synthetic Carbon & Engineering Company Ltd. concerning brush holder samples, specifications, and pricing. | 7th Jun 1935 | Box 166 \ 1 img066 | |
| Letter from Synthetic Carbon & Engineering Company regarding the performance, materials, and pricing of carbon brushes and seals. | 18th May 1938 | Box 166 \ 1 img067 | |
| Issues with the unsatisfactory assembly of dynamo brush springs causing commutator sparking. | 6th Nov 1935 | Box 166 \ 1 img068 | |
| Technical memorandum discussing the re-design of dynamo brush gear to address issues with brush sparking. | 20th Nov 1935 | Box 166 \ 1 img069 | |
| List of recommendations for improving dynamo armatures and brush holders, referencing a design by the Morganite Co. | 20th Nov 1935 | Box 166 \ 1 img070 | |
| Requesting the overhaul of a dynamo in preparation for a 10,000 miles brush test. | 21th Dec 1935 | Box 166 \ 1 img071 | |
| Proposed new design for the Phantom III Dynamo brush holder, detailing changes and required parts. | 19th Feb 1936 | Box 166 \ 1 img072 | |
| Continued list of parts for a Brush Holder, including a spring washer and lock nut. | 19th Feb 1936 | Box 166 \ 1 img073 | |
| Letter from Le Carbone Ltd. regarding trial brushes for lighting set dynamos and providing technical data. | 29th Apr 1936 | Box 166 \ 1 img074 | |
| Request for stronger springs to be made and fitted to an experimental brush-holder. | 16th May 1936 | Box 166 \ 1 img075 | |
| Request to manufacture four experimental brush-holder springs from two different wire gauges. | 11th Jun 1936 | Box 166 \ 1 img076 | |
| The completion of a dynamo brush endurance test and preparations for the next one. | 18th Jun 1936 | Box 166 \ 1 img077 | |
| Requesting the manufacture of stronger springs for experimental brushholders. | 18th Jun 1936 | Box 166 \ 1 img078 | |
| Summary of examination and tests for a new brushholder design. | 9th Jul 1936 | Box 166 \ 1 img079 | |
| List of technical observations regarding a pressure arm and brush assembly. | 5th Aug 1936 | Box 166 \ 1 img080 | |
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