| Description | Date | Identifier | |
| Improvements to the vehicle's electrical field circuit and dynamo output for battery charging. | 6th May 1930 | Box 163 \ 6 img040 | |
| Extract from a report discussing a reduced charge switching scheme for a dynamo. | 16th May 1930 | Box 163 \ 6 img041 | |
| Dynamo armature types, their outputs, modifications, and charging schemes for the 20/25 HP model. | 16th May 1930 | Box 163 \ 6 img042 | |
| Page of a report noting that for a given peak reduction, the curve did not improve and watts were higher than expected. | 22th May 1930 | Box 163 \ 6 img043 | |
| Specification for resistance wire for a half charge scheme. | 22th May 1930 | Box 163 \ 6 img044 | |
| Revision notice for the resistance value related to reduced charge switching. | 23th May 1930 | Box 163 \ 6 img045 | |
| Specification for half charge resistances to avoid misinterpretation on drawings. | 27th May 1930 | Box 163 \ 6 img046 | |
| Extract from G.W. Hancock's report on a 24-EX vehicle at 6,000 miles detailing dynamo output and condition. | 20th Jul 1930 | Box 163 \ 6 img047 | |
| Extract from G.W. Hancock's report detailing a dynamo failure during a 10,000-mile test on car 24-EX. | 15th Aug 1930 | Box 163 \ 6 img048 | |
| Request to obtain one dozen half charge resistance carriers, part number D.72623. | 8th Aug 1930 | Box 163 \ 6 img049 | |
| Standardisation of a switchbox, distribution box and field resistance unit for half/full dynamo output. | 18th Jun 1930 | Box 163 \ 6 img050 | |
| Requesting a road test for a 48-coil high output dynamo on car 24-EX. | 15th Sep 1930 | Box 163 \ 6 img051 | |
| Performance graph showing the output speed curves for a 40/50 HP S.S. Dynamo with pole piece modification for high output. | 11th Oct 1930 | Box 163 \ 6 img052 | |
| Requesting six sets of switching parts for a half-charge scheme to be installed on trials cars. | 11th Oct 1930 | Box 163 \ 6 img053 | |
| Instructions and parts list for fitting a special Dynamo and Charge-Control Scheme to a 20 HP chassis. | 15th Oct 1930 | Box 163 \ 6 img054 | |
| Testing reduced charge switching arrangements and changing the specification for the resistance units. | 7th Oct 1930 | Box 163 \ 6 img055 | |
| Confirming the dispatch of 6 sets of switching parts and 6 dynamos for testing on Trials Cars. | 17th Oct 1930 | Box 163 \ 6 img056 | |
| On the test results of six sets of reduced charge switching arrangements, noting issues with clearances and pigtail fittings. | 21th Oct 1930 | Box 163 \ 6 img057 | |
| Specification for production inspection and test of a 20/25 HP switchbox. | 24th Oct 1930 | Box 163 \ 6 img058 | |
| Set of instructions for testing electrical terminal connections and lighting circuits. | 27th Oct 1930 | Box 163 \ 6 img059 | |
| Confirming the satisfactory testing of six sets of reduced charge switching apparatus, now awaiting fitting instructions for trials cars. | 27th Oct 1930 | Box 163 \ 6 img060 | |
| The handover of six half-charge dynamos for fitting to demonstration cars. | 29th Oct 1930 | Box 163 \ 6 img061 | |
| Attaching updated pages for the Production Inspection and Test specification for the Distribution Box and Cutout. | 16th Oct 1931 | Box 163 \ 6 img062 | |
| Specification for the production inspection, adjustment, and testing of the distribution box and cutout. | 16th Oct 1931 | Box 163 \ 6 img063 | |
| Testing procedures for a dynamo and distribution box, detailing voltage, current, and resistance parameters. | 16th Oct 1931 | Box 163 \ 6 img064 | |
| Procedure for testing the cutout contacts and ammeter reading of a dynamo. | 16th Oct 1931 | Box 163 \ 6 img065 | |
| Wiring diagram for a 40/50 distribution box and cutout test. | 5th Nov 1930 | Box 163 \ 6 img066 | |
| Requesting the fitting of a new daylight running reduced charge electrical system to Sg's car for testing. | 5th Nov 1930 | Box 163 \ 6 img067 | |
| Cover note for the specification of inspection and test for a dynamo field resistance unit. | 6th Nov 1930 | Box 163 \ 6 img068 | |
| Production test and inspection procedure for a dynamo field resistance unit. | 6th Nov 1930 | Box 163 \ 6 img069 | |
| Cover letter for the Specification of Inspection and Test for a 40/50 HP Switchbox. | 6th Nov 1930 | Box 163 \ 6 img070 | |
| Production inspection and testing specification for a 40/50 HP switchbox arranged for half-charge switching. | 6th Nov 1930 | Box 163 \ 6 img071 | |
| Set of electrical testing procedures for a component using a 12-volt battery and lamp. | 25th Nov 1920 | Box 163 \ 6 img072 | |
| Criticizing the performance of a new type dynamo due to its inadequate charging rate at low speeds. | 25th Nov 1920 | Box 163 \ 6 img073 | |
| The transfer of a standard dynamo taken from vehicle 58-GN. | 25th Nov 1930 | Box 163 \ 6 img074 | |
| Half-charge dynamo scheme using a changeable resistance unit to regulate output. | 26th Nov 1930 | Box 163 \ 6 img075 | |
| Dynamo design, 'cutting in' points, resistance values, and various charging schemes. | 26th Nov 1930 | Box 163 \ 6 img076 | |
| Recommendation to proceed with experimental work on a system with advantages for varying running circumstances. | 26th Nov 1930 | Box 163 \ 6 img077 | |
| Proposal for two modified Resistance Units with identification tags to solve a vehicle's battery charging issue. | 26th Nov 1930 | Box 163 \ 6 img078 | |
| Fitting of a half charge scheme to car 18-EX. | 28th Nov 1930 | Box 163 \ 6 img079 | |
| Visit to Conduit Street regarding a 'half charge' scheme and auto charge control switch on car 58-GN. | 1st Dec 1930 | Box 163 \ 6 img080 | |
| The development of a dynamo and half-charge resistance scheme for the vehicle's electrical system. | 1st Dec 1930 | Box 163 \ 6 img081 | |
| The testing and implementation of high-output dynamos and auto-charge control switches on experimental cars. | 1st Dec 1930 | Box 163 \ 6 img082 | |
| Half charge scheme and the provision of a set of resistances for car 18-EX for R. | 1st Dec 1930 | Box 163 \ 6 img083 | |
| Internal request to order tabs for the Dynamo Resistance Unit on the 40-50 HP chassis. | 2nd Dec 1930 | Box 163 \ 6 img084 | |
| Performance of a dynamo-battery system and a two-rate charge switching scheme. | 9th Dec 1930 | Box 163 \ 6 img085 | |
| Dynamo output, field resistance, battery charging, and potential overheating issues. | 9th Dec 1930 | Box 163 \ 6 img086 | |
| Defining the standard conditions for comparing dynamo output curves, setting specific voltage and temperature parameters. | 9th Dec 1930 | Box 163 \ 6 img087 | |
| Continued discussion on dynamo output, battery charging schemes, and the prevention of overcharging. | 9th Dec 1930 | Box 163 \ 6 img088 | |
| Lengthened dynamo unit and discussing its performance curves. | 9th Dec 1930 | Box 163 \ 6 img089 | |
| Graph showing the output speed performance of a 48 coil 40/50 dynamo under three different conditions. | 26th Nov 1930 | Box 163 \ 6 img090 | |
| Graph showing the output speed performance curves for a 48 coil 40/50 dynamo at 80°C. | 26th Nov 1930 | Box 163 \ 6 img091 | |
| Graph of Dynamo RPM vs. Ampere Output under various test conditions. | 4th Dec 1930 | Box 163 \ 6 img092 | |
| Graph of output speed performance curves for a 20/25 Dynamo under various conditions. | 4th Dec 1930 | Box 163 \ 6 img093 | |
| Wiring diagram for a chassis electrical system incorporating two-rate charge switching. | 11th Dec 1930 | Box 163 \ 6 img094 | |
| Wiring diagram for the vehicle's electrical system, showing ignition and lighting circuits. | 11th Dec 1930 | Box 163 \ 6 img095 | |
| Proposal for a scheme to control dynamo output with optional full or half charge settings. | 11th Dec 1930 | Box 163 \ 6 img096 | |
| On a two-rate charge switching scheme and special switchbox for one-way interconnection. | 2nd Dec 1930 | Box 163 \ 6 img097 | |
| Continued report on the electrical system's dynamo charging and lighting switch interconnection. | 2nd Dec 1930 | Box 163 \ 6 img098 | |
| Performance characteristics of car dynamos and suggesting improvements. | 13th Dec 1930 | Box 163 \ 6 img099 | |
| Proceeding with the manufacture of dynamos using a half-charge scheme with a 6' resistance. | 16th Dec 1930 | Box 163 \ 6 img100 | |
| High output dynamos and the two-rate charge scheme. | 18th Dec 1930 | Box 163 \ 6 img101 | |
| Report discussing limitations and improvements for a dynamo and battery charging system. | 18th Dec 1930 | Box 163 \ 6 img102 | |
| Different half-charge schemes for the vehicle's dynamo and battery system. | 18th Dec 1930 | Box 163 \ 6 img103 | |
| Load and output requirements for a dynamo battery system, arguing against a proposed two-rate charge switching scheme. | 19th Dec 1930 | Box 163 \ 6 img104 | |
| Dynamo charging curves and concluding the current dynamo output is insufficient for present requirements. | 9th Dec 1930 | Box 163 \ 6 img105 | |
| Query and reply regarding a generator's cut-in speed in relation to a proposed switching modification. | 23th Dec 1930 | Box 163 \ 6 img106 | |
| Battery replacement and dynamo adjustment for car No.58-GN. | 22th Dec 1930 | Box 163 \ 6 img107 | |
| Design and implementation of a dynamo two-rate charging system for a car. | 23th Dec 1930 | Box 163 \ 6 img108 | |
| Internal memorandum discussing the design of a dynamo battery system and two-rate charge switching. | 24th Dec 1930 | Box 163 \ 6 img109 | |
| Dynamo output, battery charging limitations, and potential improvements. | 24th Dec 1930 | Box 163 \ 6 img110 | |
| Experimental work on dynamos, automatic charge cut-off, and improving output. | 24th Dec 1930 | Box 163 \ 6 img111 | |
| Performance issues and testing results for a two-rate dynamo charge scheme. | 31th Dec 1930 | Box 163 \ 6 img112 | |
| Instructions for altering a switchbox on chassis 58-GN, including a parts list and material considerations. | 1st Jan 1931 | Box 163 \ 6 img113 | |
| Technical memorandum discussing the dynamo output and two-rate charge scheme for various vehicles. | 3rd Jan 1931 | Box 163 \ 6 img114 | |
| Tests and proposed modifications for a dynamo's charging system and output. | 3rd Jan 1931 | Box 163 \ 6 img115 | |
| Continued memorandum discussing dynamo output, limitations, and potential improvements for vehicle electrical systems. | 3rd Jan 1931 | Box 163 \ 6 img116 | |
| Modifications and experiments for the Phantom II dynamo and two-rate charge scheme. | 1st Jan 1931 | Box 163 \ 6 img117 | |
| Alterations to the Phantom II dynamo and two-rate charge scheme, including battery performance and headlamp bulb wattage. | 1st Jan 1931 | Box 163 \ 6 img118 | |
| Issues with dynamo output, including falling current at high speeds and due to heat, and potential solutions. | 6th Jan 1931 | Box 163 \ 6 img119 | |
| Concluding that the 3rd brush scheme is inadequate and proposing a vibrator voltage controller for improved dynamo output. | 1st Jan 1931 | Box 163 \ 6 img120 | |
| Modifications to a car's electrical charging system and lighting, referred to as the 'Two Charge Scheme'. | 10th Jan 1931 | Box 163 \ 6 img121 | |
| Dynamo safety, headlamp bulbs and production charging schemes. | 1st Jan 1931 | Box 163 \ 6 img122 | |
| Request to supply two-rate charge resistances and change over all experimental cars to the 6' resistance. | 3rd Jan 1931 | Box 163 \ 6 img123 | |
| Modifications to a two-rate charge scheme for various car chassis. | 4th Jan 1931 | Box 163 \ 6 img124 | |
| Querying the specifications of a medium output dynamo and its production availability for a two-rate charge scheme on car 58-GN. | 16th Jan 1931 | Box 163 \ 6 img125 | |
| Modification order for four chassis under the 'Two Rate Charge Scheme'. | 19th Jan 1931 | Box 163 \ 6 img126 | |
| Dynamo output, a 'half charge scheme', and comparing it with a Lucas dynamo. | 20th Jan 1931 | Box 163 \ 6 img127 | |
| The dynamo output, a two-charge scheme, and the standardization of 48-watt headlamp bulbs. | 21th Jan 1931 | Box 163 \ 6 img128 | |
| Two-charge dynamo output scheme and clarifying previous correspondence. | 23th Jan 1931 | Box 163 \ 6 img129 | |
| Remark on a standardisation sheet for a Switchbox with a two-rate charge scheme. | 30th Jan 1931 | Box 163 \ 6 img130 | |
| Two-rate charge scheme and comparing output curves for different dynamo modifications. | 30th Jan 1931 | Box 163 \ 6 img131 | |
| Technical points on dynamos, armature reluctance, and headlamp bulb wattage. | 21th Jan 1931 | Box 163 \ 6 img132 | |
| The disadvantage of fitting more powerful light bulbs, specifically the increased rate of discharge. | 30th Jan 1931 | Box 163 \ 6 img133 | |
| Graph of output speed performance curves for a 48 coil medium output machine, plotting ampere output against dynamo RPM. | 31th Jan 1931 | Box 163 \ 6 img134 | |
| Implementation of a two-rate charge scheme and allocation of dynamos for experimental chassis. | 31th Jan 1931 | Box 163 \ 6 img135 | |
| Standardization of dynamos and two-rate charge schemes for the 20/25 chassis. | 4th Feb 1931 | Box 163 \ 6 img136 | |
| Proposal to modify dynamo poles on 25 HP T series cars instead of adopting a half-charge scheme. | 4th Feb 1931 | Box 163 \ 6 img137 | |
| Dynamo and die-cast Commutator End Bracket for the 20/25 HP Chassis. | 5th Feb 1931 | Box 163 \ 6 img138 | |
| Table of resistances and corresponding lengths for a two-rate charge scheme. | 7th Feb 1931 | Box 163 \ 6 img139 | |
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