| Description | Date | Identifier | |
| Proposal to use a Bijur trembler regulator for the dynamo on the 20 HP and new 50 HP chassis. | 3rd May 1919 | Box 31 \ 1 Scan038 | |
| Extract discussing the number of contacts required for the main charging switch and vibrator regulator on a Lucas Junction Box. | 24th May 1919 | Box 31 \ 1 Scan039 | |
| Inquiring about the status of arrangements for the experimental production of condensers and vibrator regulators. | 30th May 1919 | Box 31 \ 1 Scan040 | |
| Production of electrical ignition condensers and vibratory regulators with B.T.H. and Watford Magneto Co. | 11th Jun 1919 | Box 31 \ 1 Scan041 | |
| Requesting recommendations for a vibrator regulator for the 20 HP chassis. | 18th Sep 1919 | Box 31 \ 1 Scan042 | |
| Information from the Delco Company regarding generators and plans to test competitor models. | 25th Nov 1919 | Box 31 \ 1 Scan043 | |
| Letter from Dayton Engineering Laboratories discussing third-brush-regulated versus voltage-control type generators. | 12th Nov 1919 | Box 31 \ 1 Scan044 | |
| The salient features required for generators to be purchased for the American Cars. | 31th Dec 1919 | Box 31 \ 1 Scan045 | |
| The requirements for the vehicle's battery charging system and electrical load calculations. | 31th Dec 1919 | Box 31 \ 1 Scan046 | |
| Generator control units, including correspondence with the Delco Company and tentative specifications. | 31th Dec 1919 | Box 31 \ 1 Scan047 | |
| Generator specifications and plans to acquire sample units from various manufacturers. | 31th Dec 1919 | Box 31 \ 1 Scan048 | |
| Report outlining the features of different electrical regulation systems, including the Third Brush Regulator and Constant Voltage System. | 31th Dec 1919 | Box 31 \ 1 Scan049 | |
| Report page detailing the operation of various generator and voltage regulator systems. | 31th Dec 1919 | Box 31 \ 1 Scan050 | |
| Query on the effect of temperature on dynamo regulation, comparing the trembler system and third brush regulation. | 20th Jan 1920 | Box 31 \ 1 Scan051 | |
| Report on American-made dynamos and their vibrator regulator control. | 10th Feb 1920 | Box 31 \ 1 Scan052 | |
| Continued memo discussing cutting-in speed variations in dynamos, including for the Prince of Wales' car, and proposing further tests. | 10th Feb 1920 | Box 31 \ 1 Scan053 | |
| Car wiring connection sockets and the development of in-house dynamos. | 5th Mar 1920 | Box 31 \ 1 Scan054 | |
| Issues with accumulator cells, including terminal leakage and charging difficulties, with proposals for improved dynamo regulation. | 15th Mar 1920 | Box 31 \ 1 Scan055 | |
| Forwarding and performance testing of an aero type dynamo. | 19th May 1920 | Box 31 \ 1 Scan056 | |
| Electrical specifications and test results for a Liberty Regulator. | 9th Jun 1920 | Box 31 \ 1 Scan057 | |
| Cross-reference note for the B.R.C. Dynamo regulator control. | 22th Jun 1920 | Box 31 \ 1 Scan058 | |
| Experimental investigation and design of a vibrator regulator and cutout for a chassis dynamo. | 22th Jun 1920 | Box 31 \ 1 Scan059 | |
| Circuit diagram for a combined cut-out and vibrator regulator for a shunt wound chassis lighting dynamo. | 23th Jun 1920 | Box 31 \ 1 Scan060 | |
| Advantages and disadvantages of a combined cut-out and vibrator regulator. | 25th Jun 1920 | Box 31 \ 1 Scan061 | |
| Lamp voltages and the design of a vibrator regulator and cutout. | 25th Jun 1920 | Box 31 \ 1 Scan062 | |
| Preliminary report on investigations into the design and performance of shunt wound dynamos and vibrator regulators. | 22th Jul 1920 | Box 31 \ 1 Scan063 | |
| Defining standardized volt-ampere relations for testing dynamo performance against an ideal battery. | 22th Jul 1920 | Box 31 \ 1 Scan064 | |
| Comparison of shunt wound machines, including Bosch, Lucas, Smith, and Bijur, for dynamo performance and design considerations. | 22th Jul 1920 | Box 31 \ 1 Scan065 | |
| Testing a wind-driven aero dynamo and a 12 Volt Bijur dynamo with combined cutout and regulator. | 22th Jul 1920 | Box 31 \ 1 Scan066 | |
| The erratic operation of a vibrator regulator on a 12-volt battery and a comparison to its performance on an 8-volt battery. | 22th Jul 1920 | Box 31 \ 1 Scan067 | |
| Standard volt-ampere characteristic chart for battery and leads during dynamo tests. | 17th Jun 1920 | Box 31 \ 1 Scan068 | |
| Standard Volt-Ampere characteristics of a battery for Dynamo tests. | 17th Jun 1920 | Box 31 \ 1 Scan069 | |
| Work on dynamo output regulation and plans for future in-house development. | 24th Jul 1920 | Box 31 \ 1 Scan070 | |
| Sensitivity and performance of vibrator voltage and current regulators, specifically the Bijur regulator. | 26th Jul 1920 | Box 31 \ 1 Scan071 | |
| Suitability of a specific type of dynamo regulation for the American-built chassis. | 26th Jul 1920 | Box 31 \ 1 Scan072 | |
| Instruction sheet detailing the winding of coils on an aero dynamo regulator. | 13th Aug 1920 | Box 31 \ 1 Scan073 | |
| Technical specifications for an Aero Type Dynamo with Vibrator Regulator. | 17th Aug 1920 | Box 31 \ 1 Scan074 | |
| Continued description of the construction and operation of a regulator and brush system for an electrical machine. | 17th Aug 1920 | Box 31 \ 1 Scan075 | |
| Analysis of the characteristics of carbon contacts and their effect on field windings and voltage curves. | 17th Aug 1920 | Box 31 \ 1 Scan076 | |
| Continued analysis of a vibrator control system, comparing its operation in hot versus cold conditions. | 17th Aug 1920 | Box 31 \ 1 Scan077 | |
| The steadiness of operation when using carbon contacts versus metal contacts in a control system. | 17th Aug 1920 | Box 31 \ 1 Scan078 | |
| Hand-drawn wiring diagram for the connections of an Aero Dynamo and Vibrator Regulator. | 27th Sep 1920 | Box 31 \ 1 Scan079 | |
| Technical review and comparison of an American Bosch Dynamo and a Westinghouse Dynamo. | 27th Sep 1920 | Box 31 \ 1 Scan080 | |
| Continued report assessing various dynamo machines and their components, including armature and commutator quality. | 27th Sep 1920 | Box 31 \ 1 Scan081 | |
| Ampere-speed performance curves for an aero-type dynamo with a vibrator regulator. | 1st Oct 1920 | Box 31 \ 1 Scan082 | |
| Alterations to volt-ampere characteristics for hot and cold conditions. | 1st Oct 1920 | Box 31 \ 1 Scan083 | |
| Analysis of performance curves and irregularities caused by carbon contacts in a regulator. | 1st Oct 1920 | Box 31 \ 1 Scan084 | |
| Continued discussion on testing a machine and regulator, focusing on the performance of carbon contacts. | 1st Oct 1920 | Box 31 \ 1 Scan085 | |
| Table defining the new standard volt-ampere characteristic of battery and leads for dynamo tests. | 1st Oct 1920 | Box 31 \ 1 Scan086 | |
| Chart showing the special volt-ampere characteristic of a battery and leads for dynamo tests with a vibrator regulator. | 1st Oct 1920 | Box 31 \ 1 Scan087 | |
| Output-Speed curves for an Aero Type Uā wind-driven dynamo, comparing vibrator regulator controlled and uncontrolled performance. | 1st Oct 1925 | Box 31 \ 1 Scan088 | |
| Blank document with a purple ink stamp from the Print Room. | 5th Oct 1920 | Box 31 \ 1 Scan089 | |
| Tests on the Smith dynamo, its failure by 'roasting', and comparing it with Lucas and third-brush dynamo systems. | 5th Oct 1920 | Box 31 \ 1 Scan090 | |
| Continued page from a document discussing dynamo armature plate design and efficiency. | 1st Oct 1920 | Box 31 \ 1 Scan091 | |
| Dynamo and vibrator regulator experiments, seeking input on field winding design. | 5th Oct 1920 | Box 31 \ 1 Scan092 | |
| Letter from Dayton Engineering Laboratories Co. describing the operation of their circuit breakers. | 5th Oct 1920 | Box 31 \ 1 Scan093 | |
| Wiring diagram showing the connections of a Disco Vibrator Regulator and Cut-out. | 12th Oct 1920 | Box 31 \ 1 Scan094 | |
| Technical memorandum discussing the inspection and features of a vibrator type regulator from an Argo car. | 25th Oct 1920 | Box 31 \ 1 Scan095 | |
| Principles of a crude apparatus for voltage control in a battery charging circuit. | 25th Oct 1920 | Box 31 \ 1 Scan096 | |
| Hand-drawn wiring diagram for the connections of a Disco Vibrator Regulator and Cut-out. | 28th Nov 1933 | Box 31 \ 1 Scan097 | |
| Letter from Rolls Royce of America regarding a Delco circuit breaker and Bakelized canvas insulation for a chassis electrical system. | 26th Oct 1920 | Box 31 \ 1 Scan098 | |
| Heating tests and control methods for shunt wound dynamos, specifically for the Goshawk project. | 13th Dec 1920 | Box 31 \ 1 Scan099 | |
| Directions for the adjustment of the 'SCOTT' charging regulator. | 21th Dec 1920 | Box 31 \ 1 Scan100 | |
| Cover sheet regarding the performances of shunt-wound dynamos suitable for external regulator control. | 1st Feb 1921 | Box 31 \ 1 Scan101 | |
| Experimental bench investigation of a Westinghouse vibrator regulator with a combined cut-out. | 2nd Feb 1921 | Box 31 \ 1 Scan102 | |
| Analysis of the dynamo's cut-out regulator windings and their effect on voltage and current at different speeds. | 2nd Feb 1921 | Box 31 \ 1 Scan103 | |
| Analysis of a voltage regulator's performance concerning the effects of speed and temperature on battery charging. | 2nd Feb 1921 | Box 31 \ 1 Scan104 | |
| Cessation of experimental work on vibrator regulators for the 40/50 Chassis and Goshawk dynamos. | 16th Feb 1921 | Box 31 \ 1 Scan105 | |
| Description of the Bleriot-Phi starting and lighting equipment. | 25th Feb 1921 | Box 31 \ 1 Scan106 | |
| Page describing the construction and output control of a dynamo, including its magnetic circuit and voltage regulation. | 10th Dec 1920 | Box 31 \ 1 Scan107 | |
| Description of a voltage regulator's operation, including charging an accumulator and managing high-demand electrical devices. | 10th Dec 1920 | Box 31 \ 1 Scan108 | |
| Page describing the operation of a voltage regulator, dynamo, and charging circuit. | 10th Dec 1926 | Box 31 \ 1 Scan109 | |
| Page describing voltage regulation, dynamo specifications, and the starter mechanism. | 10th Dec 1926 | Box 31 \ 1 Scan110 | |
| Technical description of starter motor specifications and the operation of the switchboard. | 16th Oct 1920 | Box 31 \ 1 Scan111 | |
| Description of the operation and features of the relay switch and the associated earthed return wiring system. | 10th Dec 1920 | Box 31 \ 1 Scan112 | |
| Page detailing the starter circuit, lamp connections, and the use of independent terminals. | 10th Dec 1920 | Box 31 \ 1 Scan113 | |
| Hand-drawn circuit diagram for the Bleriot-Phi System. | 25th Feb 1921 | Box 31 \ 1 Scan114 | |
| Modifications for dynamos on the 40/50 and Goshawk chassis, stopping work on external regulators and adding a third brush. | 7th Mar 1921 | Box 31 \ 1 Scan115 | |
| Mr. Royce's decision on using controlled machines, particularly dynamos, and outlining next steps for testing, costing, and design. | 7th Mar 1921 | Box 31 \ 1 Scan116 | |
| Letter from Bleriot Limited justifying the use of a vibrator regulator in their dynamo equipment. | 8th Mar 1921 | Box 31 \ 1 Scan117 | |
| Page 2 of a typed letter from Bleriot Limited. | 16th Dec 1920 | Box 31 \ 1 Scan118 | |
| Reliability and control systems of dynamos, and the move away from vibrator regulators. | 9th Apr 1921 | Box 31 \ 1 Scan119 | |
| Dissatisfaction with dynamo suppliers and recommending Delco for car electrical equipment. | 4th May 1921 | Box 31 \ 1 Scan120 | |
| Performance of the Bijur starter motor and generator, including battery comparisons. | 18th May 1921 | Box 31 \ 1 Scan121 | |
| Technical discussion on starter motors, generators, and electrical system performance, comparing R-R, Bijur, and Bosch components. | 29th Apr 1929 | Box 31 \ 1 Scan122 | |
| Generators, battery charging, and voltage regulator systems, comparing Westinghouse and Bijur components. | 7th Jun 1921 | Box 31 \ 1 Scan123 | |
| Correspondence regarding electrical systems for the Goshawk II, discussing proposals and component orders. | 7th Jun 1921 | Box 31 \ 1 Scan124 | |
| Supplier selection for a dynamo and motor for the Goshawk II project. | 7th Jun 1921 | Box 31 \ 1 Scan125 | |
| Response to U.S.A. complaints regarding batteries running down and the suitability of different dynamo types. | 8th Jun 1921 | Box 31 \ 1 Scan126 | |
| Vibrator regulators, car export specifications, and issues with leaky Exide battery cells. | 13th Jun 1921 | Box 31 \ 1 Scan127 | |
| Extract from the minutes of a conference regarding dynamo voltage control and supply arrangements. | 13th Jun 1921 | Box 31 \ 1 Scan128 | |
| The 4-EX model returned from America, focusing on the Bijur dynamo's reliability and noise issues. | 17th Jun 1921 | Box 31 \ 1 Scan129 | |
| The automatic and hand-operated charging switches for the 4-EX vehicle. | 17th Jun 1921 | Box 31 \ 1 Scan130 | |
| Vibrator regulator control of output for limiting the charging current to a battery. | 28th Nov 1921 | Box 31 \ 1 Scan131 | |
| List of various dynamo output regulators. | 4th Jan 1922 | Box 31 \ 1 Scan132 | |
| External voltage and current regulators for chassis dynamos, and the definition of 'inherently controlled dynamos'. | 11th Jan 1922 | Box 31 \ 1 Scan133 | |
| Dynamo fusing systems and the volt-ampere characteristics of 'inherently controlled' dynamos. | 11th Nov 1922 | Box 31 \ 1 Scan134 | |
| Continued discussion on vehicle electrical system requirements, focusing on battery charging and dynamo performance. | 3rd Nov 1922 | Box 31 \ 1 Scan135 | |
| Description of the operating principles of an automatic dynamo regulator. | 3rd Nov 1922 | Box 31 \ 1 Scan136 | |
| Controlling dynamo output for a chassis electrical system using volt-ampere characteristics and external regulators. | 3rd Nov 1922 | Box 31 \ 1 Scan137 | |
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