| Description | Date | Identifier | |
| Proposal to use T.C.C. ignition condensers as a replacement, with a request for rigorous testing. | 2nd Jan 1936 | Box 165 \ 5 img150 | |
| Letter from Wego Condenser Co. Ltd. announcing their approved status on the Air Ministry List. | 18th May 1936 | Box 165 \ 5 img151 | |
| Data sheet for New Small Wego British Aroclor Condensers, Type A.I. Continuous Rated. | 19th May 1946 | Box 165 \ 5 img152 | |
| Cover page for a brochure on Wego British Aroclor Condensers. | 19th May 1946 | Box 165 \ 5 img153 | |
| Front cover of a WEGO capacitor product catalog or brochure. | 19th May 1946 | Box 165 \ 5 img154 | |
| Promotional leaflet for a condenser manufacturer detailing factory expansion and listing international agents. | 19th May 1946 | Box 165 \ 5 img155 | |
| Price list and specification sheet for Type T.W. and Type T.L. tubular condensers. | 19th May 1946 | Box 165 \ 5 img156 | |
| Specification and price list for Wego British Type BT (Bakelite) and Type ALU capacitors. | 19th May 1946 | Box 165 \ 5 img157 | |
| Specification sheet for WEGO British condensers, detailing types, dimensions, and prices. | 19th May 1946 | Box 165 \ 5 img158 | |
| Product specification sheet for WEGO British capacitors of types HS, HR, and HP. | 19th May 1946 | Box 165 \ 5 img159 | |
| Product specification and price list for Wego British transmitting condensers. | 19th May 1946 | Box 165 \ 5 img160 | |
| Product data sheet for interference eliminators and compensators for various electrical motors and apparatus. | 22th May 1936 | Box 165 \ 5 img161 | |
| Letter to Wego Condenser Co. Ltd. requesting a sample of a material known as Aroclor for inspection and testing. | 22th May 1936 | Box 165 \ 5 img162 | |
| Letter from Wego Condenser Co. Ltd. responding to a request for a sample of Aroclor, which they are unable to supply. | 25th May 1936 | Box 165 \ 5 img163 | |
| Letter to Wego Condenser Co. Ltd. requesting the source of supply for an Aroclor sample needed for an ignition coil experiment. | 27th May 1936 | Box 165 \ 5 img164 | |
| Letter from Delco-Remy & Hyatt Ltd. regarding the supply of British-made condensers and ignition components for testing. | 18th Sep 1936 | Box 165 \ 5 img165 | |
| Invoice from Delco-Remy & Hyatt Ltd. for condensers and contact point sets supplied for test purposes. | 18th Sep 1936 | Box 165 \ 5 img166 | |
| Invoice from Delco-Remy & Hyatt Ltd. for condensers and contact point sets supplied for test purposes. | 18th Sep 1936 | Box 165 \ 5 img167 | |
| Internal requisition to order an ignition testing condenser. | 25th Feb 1937 | Box 165 \ 5 img168 | |
| The accessibility of the Phantom III condenser and a suggestion for improvement. | 28th May 1937 | Box 165 \ 5 img169 | |
| Proposal to improve the accessibility of the Phantom III condenser for easier replacement by slotting the contact strip hole. | 28th May 1937 | Box 165 \ 5 img170 | |
| Requesting endurance tests to be carried out on at least half a dozen Lucas condensers for a new distributor. | 17th Feb 1939 | Box 165 \ 5 img171 | |
| Request for the capacity values, in microfarads, of condensers for various Bentley and Rolls-Royce chassis. | 15th May 1939 | Box 165 \ 5 img172 | |
| Specifications and usage of various condensers on different car models. | 25th May 1939 | Box 165 \ 5 img173 | |
| Cover note regarding the brush and commutator system for 20/25 dynamos. | 29th Sep 1924 | Box 165 \ 6 img001 | |
| Note providing cross-references for previous correspondence about a 20 HP dynamo. | 29th Sep 1924 | Box 165 \ 6 img002 | |
| Representative performance figures and routine procedure for the New Standard 20 HP Dynamo. | 29th Sep 1924 | Box 165 \ 6 img003 | |
| Blueprint graph of representative dynamo output curves against R.P.M. and chassis M.P.H. | 27th May 1925 | Box 165 \ 6 img004 | |
| Chart of dynamo output at different speeds under various electrical loads. | 30th Aug 1925 | Box 165 \ 6 img005 | |
| Requesting a failed dynamo be returned to the Experimental Department in Derby rather than being repaired in Paris. | 10th Sep 1925 | Box 165 \ 6 img006 | |
| Dynamo failure on 9-G-111 due to a suspected sticking control brush. | 14th Sep 1925 | Box 165 \ 6 img007 | |
| Electrical equipment failures during a 10,000-mile test of a 20 HP vehicle. | 22th Sep 1925 | Box 165 \ 6 img008 | |
| Feature for accessing the dynamo on the 20 HP model and adding a note to the instruction book. | 28th Sep 1925 | Box 165 \ 6 img009 | |
| The required dynamo brush clearances for 40/50 HP and 20 HP models. | 3rd Nov 1925 | Box 165 \ 6 img010 | |
| Clarifying the minimum dynamo brush clearances for 20 HP models. | 10th Nov 1925 | Box 165 \ 6 img011 | |
| Correct dynamo brush clearances for the 20 HP model. | 16th Nov 1925 | Box 165 \ 6 img012 | |
| Improvements to the dynamo and ignition platinum points. | 20th Nov 1925 | Box 165 \ 6 img013 | |
| Performance graph comparing the specified and actual output of a 20 HP dynamo. | 1st Feb 1926 | Box 165 \ 6 img014 | |
| Chassis 10-GIII after 7526 miles, detailing the condition of the Magneto and Dynamo. | 23th Apr 1926 | Box 165 \ 6 img015 | |
| Test results for a fixed conductance dynamo on a 20 HP model. | 7th Apr 1925 | Box 165 \ 6 img016 | |
| The condition of the magneto, drive, and dynamo of chassis 10-GIII after a 10,027-mile test. | 4th May 1926 | Box 165 \ 6 img017 | |
| The findings from an inspection of production dynamo No. 1801. | 30th Jun 1926 | Box 165 \ 6 img018 | |
| Procedure for dynamo tests. | 12th Jan 1926 | Box 165 \ 6 img019 | |
| Instructions for an experimental 20 HP chassis dynamo to reduce noise. | 7th Jun 1926 | Box 165 \ 6 img020 | |
| Test results for a fixed conductance dynamo on a 20 HP car. | 28th Jun 1926 | Box 165 \ 6 img021 | |
| Graph showing the ampere output of a 20 HP dynamo at various RPMs and resistances. | 26th May 1926 | Box 165 \ 6 img022 | |
| EFC to RHC regarding the stripping and re-winding of two 20 HP dynamo armatures. | 11th Aug 1926 | Box 165 \ 6 img023 | |
| Requesting modifications to a 20 HP dynamo to reduce noise. | 21th Aug 1926 | Box 165 \ 6 img024 | |
| Observations on the operation of 20 HP and 40/50 HP standard dynamos without a battery connected. | 28th Jun 1926 | Box 165 \ 6 img025 | |
| Test results concerning the voltage and amperage of the dynamo and distribution box for 20 HP and 40/50 HP models under various conditions. | 28th Jun 1926 | Box 165 \ 6 img026 | |
| Page discussing operational risks and the reduction of voltage/ampere output at high speeds. | 28th Jun 1926 | Box 165 \ 6 img028 | |
| Inspection and test report for a 20 HP Production Dynamo No. 1863, detailing minor electrical and constructional faults. | 1st Sep 1926 | Box 165 \ 6 img029 | |
| Cover note for a report on temperature observations of dynamos during chassis dynamometer tests. | 5th Oct 1926 | Box 165 \ 6 img030 | |
| Temperatures reached by dynamos during dynamometer testing on various chassis. | 2nd Oct 1926 | Box 165 \ 6 img031 | |
| Testing and potential standardization of a 20 HP dynamo with solid pole pieces. | 13th Oct 1926 | Box 165 \ 6 img032 | |
| Performance graph of a dynamo for the 20 HP model, showing output against RPM at various temperatures. | 28th Apr 1937 | Box 165 \ 6 img033 | |
| The negative effects of a 20 HP dynamo modification intended for silencing. | 13th Oct 1926 | Box 165 \ 6 img034 | |
| Performance graph of the N.C.288 Dynamo for the 20 HP model, showing ampere output and voltage against RPM and chassis speed. | 18th Oct 1926 | Box 165 \ 6 img035 | |
| Specification for the production inspection and testing of a 20 HP Dynamo with a 57 coil armature. | 18th Oct 1926 | Box 165 \ 6 img036 | |
| Procedure for the bedding and testing of dynamo brushes. | 18th Oct 1926 | Box 165 \ 6 img037 | |
| Continued list of test procedures for a dynamo, including checks for voltage, noise, sparking, and insulation. | 28th Oct 1926 | Box 165 \ 6 img038 | |
| Test report for a 20 HP Production Dynamo No. 84H, detailing minor faults found during inspection. | 28th Oct 1926 | Box 165 \ 6 img039 | |
| Querying the production advantages of using solid pole pieces over laminated ones for a 20 HP dynamo. | 23th Nov 1926 | Box 165 \ 6 img040 | |
| Potentially noisy 20 HP monthly production dynamo, model no. P.9.K. | 2nd Dec 1926 | Box 165 \ 6 img041 | |
| Temperature observations relating to the melting points of commutator solder and sentinels on 40/50 HP and 20 HP machines. | 2nd Dec 1926 | Box 165 \ 6 img042 | |
| Standardization of dynamo and motor poles, considering a switch from laminated to solid poles for cost savings. | 8th Dec 1926 | Box 165 \ 6 img043 | |
| Comparison table of features for various horsepower dynamos and motors. | 16th Dec 1926 | Box 165 \ 6 img044 | |
| Alterations to the 20 HP dynamo specification. | 15th Dec 1926 | Box 165 \ 6 img045 | |
| Noise from a Dynamo S.5.H. machine and suggesting alterations and tests to reduce it. | 16th Dec 1926 | Box 165 \ 6 img046 | |
| Test results on 20 HP dynamos with varying eccentricities and their effect on quietness. | 17th Dec 1926 | Box 165 \ 6 img047 | |
| Table of dimensions for main and control dynamo brushes for various HP models. | 24th Dec 1926 | Box 165 \ 6 img048 | |
| Practically noiseless 28-slot armature for a 20 HP dynamo and requesting further production for testing. | 31th Dec 1926 | Box 165 \ 6 img049 | |
| Testing of Dynamo No. 161 with an experimental armature on a 20-HP chassis. | 29th Dec 1926 | Box 165 \ 6 img050 | |
| Instruction to experimentally build a 28 slot, 56 commutator segment straight slot armature for a 20 HP Dynamo. | 4th Jan 1927 | Box 165 \ 6 img051 | |
| Modifications for noisy 20 HP chassis dynamos. | 7th Jan 1927 | Box 165 \ 6 img052 | |
| Graph showing dynamo output curves for a 20 HP engine under different operating conditions. | 10th Jan 1927 | Box 165 \ 6 img053 | |
| The urgent provision of a quieter 20 HP, 28-slot dynamo armature due to issues with silence on the chassis. | 10th Jan 1927 | Box 165 \ 6 img054 | |
| Request to put in hand one custom armature for a 20 HP chassis dynamo. | 14th Jan 1927 | Box 165 \ 6 img055 | |
| Statement regarding the adoption of a new armature design with 28 slots and 56 coils to make the dynamo quieter. | 18th Jan 1927 | Box 165 \ 6 img056 | |
| Continuation page detailing calculations for coil pitch and commutator connections. | 31th Jan 1927 | Box 165 \ 6 img057 | |
| Experiment with a 20 HP dynamo, No. 625, involving solid poles and a 28 slot armature to reduce noise. | 31th Jan 1927 | Box 165 \ 6 img058 | |
| Extract discussing the supply and wear patterns of 20 HP dynamo brushes. | 14th Feb 1927 | Box 165 \ 6 img059 | |
| Confirming a 20 HP, 28 slot armature with solid poles is ready for chassis 10-GIII. | 16th Feb 1927 | Box 165 \ 6 img060 | |
| Exclusion of dynamo brushes and other parts from the spares kit. | 2nd Feb 1927 | Box 165 \ 6 img061 | |
| Page 2 of a revised letter from Le Carbone, detailing sample dynamo brushes for 20 HP and 40/50 HP lighting sets. | 3rd Mar 1927 | Box 165 \ 6 img062 | |
| Bench-test report for E.G.A. Le Carbone Brushes. | 3rd Mar 1927 | Box 165 \ 6 img063 | |
| The wear rates of different brush types, comparing a new type to the standard and noting an ongoing test. | 29th Jun 1920 | Box 165 \ 6 img064 | |
| Bench test report for EG347 LeCarbone 20lb Dynamo Brushes. | 1st Apr 1927 | Box 165 \ 6 img065 | |
| Instructions regarding the testing and comparison of different brushes to solve a chattering issue. | 29th Jun 1929 | Box 165 \ 6 img066 | |
| Bench test report on the performance of LFC3DBS Le Carbone 20/25 dynamo brushes. | 4th Apr 1927 | Box 165 \ 6 img067 | |
| Test report on the wear of different brushes and their effect on a commutator. | 20th Jun 1920 | Box 165 \ 6 img068 | |
| Agreement form discussing an addition to an instruction sheet regarding machine rectification for faulty output and commutation. | 14th Mar 1927 | Box 165 \ 6 img069 | |
| On the testing and potential production of modified 20 HP dynamos for improved silence in Phantom vehicles. | 31th Mar 1927 | Box 165 \ 6 img070 | |
| Trialling a 20 HP dynamo with a new 28-slot armature to fix a noise issue. | 4th Apr 1927 | Box 165 \ 6 img071 | |
| Confirming the production of 25 experimental 20 HP dynamo armatures after satisfactory silence testing. | 6th Apr 1927 | Box 165 \ 6 img072 | |
| Requesting a written report on the success of a 28-slot armature in improving the silence of a 20 HP Dynamo. | 23th Apr 1927 | Box 165 \ 6 img073 | |
| The testing of three different 20-HP dynamos with 28 slot armatures. | 25th Apr 1927 | Box 165 \ 6 img074 | |
| Experimental 20 HP Dynamo armature with 28 slots for noise reduction. | 26th Apr 1927 | Box 165 \ 6 img075 | |
| The temperature of a chassis dynamo following a 10,000 mile test. | 26th May 1927 | Box 165 \ 6 img076 | |
| Design specifications for a car dynamo, focusing on coil and slot configurations. | 29th Apr 1927 | Box 165 \ 6 img077 | |
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