| Description | Date | Identifier | |
| Return of a 20 HP Production Dynamo due to issues with the commutator solder. | 2nd Oct 1928 | Box 165 \ 6 img178 | |
| From EFC to RHC requesting the commutator of a 20 HP dynamo armature be skimmed up. | 4th Oct 1928 | Box 165 \ 6 img179 | |
| Return and testing of a 20 HP monthly dynamo T6K. | 13th Dec 1928 | Box 165 \ 6 img180 | |
| Extract from a report detailing numerous faults with a 20 HP car, particularly its electrical system. | 31th Dec 1928 | Box 165 \ 6 img181 | |
| Dynamo and green lamp performance and adjustments on experimental cars. | 14th Jan 1929 | Box 165 \ 6 img182 | |
| Instruction sheet detailing the removal and inspection of a dynamo from a car. | 14th Jan 1929 | Box 165 \ 6 img183 | |
| Instruction sheet with handwritten notes on the condition of a commutator and a driving-end bearing. | 30th Jan 1929 | Box 165 \ 6 img184 | |
| Specifications for the production inspection and testing of 20 HP and 40/50 HP dynamos. | 30th Jan 1929 | Box 165 \ 6 img185 | |
| Specification for the production inspection and test of a 20 HP Dynamo with a 28 slot armature. | 30th Jan 1929 | Box 165 \ 6 img186 | |
| Instructions for the bedding of dynamo brushes. | 30th Jan 1929 | Box 165 \ 6 img187 | |
| Continuation of dynamo testing procedures, covering output, voltage, noise, vibration, and insulation checks. | 28th Jan 1929 | Box 165 \ 6 img188 | |
| Dynamo characteristics and headlamp requirements for two chassis models. | 28th Jan 1929 | Box 165 \ 6 img189 | |
| Improving vehicle headlamps and the resulting electrical challenges for dynamos and batteries. | 8th Feb 1929 | Box 165 \ 6 img190 | |
| Dynamo output, weight reduction, and electrical system tests for the 'SS' chassis. | 8th Feb 1929 | Box 165 \ 6 img191 | |
| Confirming alternative Morganite brushes are satisfactory for the dynamo on 20 HP & 40/50 HP chassis. | 3rd Feb 1929 | Box 165 \ 6 img192 | |
| Dynamo output and recommendations for an intermediate armature. | 20th Feb 1929 | Box 165 \ 6 img193 | |
| Design of an intermediate output armature, focusing on reducing noise by changing the number of slots and sections. | 21th Feb 1929 | Box 165 \ 6 img194 | |
| Recommendation to experimentally test a 24-slot Phantom armature, detailing its design and performance benefits. | 4th Apr 1929 | Box 165 \ 6 img195 | |
| Issues with intermediate output dynamo armatures and proposing trials for higher output machines. | 4th Apr 1929 | Box 165 \ 6 img196 | |
| Trials of intermediate armatures to ensure they are interchangeable with standard armatures in standard carcases. | 4th Apr 1929 | Box 165 \ 6 img197 | |
| Particulars of winding and commutator settings for intermediate output armatures. | 17th Apr 1929 | Box 165 \ 6 img198 | |
| Order for two intermediate output machines and one armature for a 20 HP carcase. | 2nd May 1929 | Box 165 \ 6 img199 | |
| The testing arrangement for intermediate output armatures in 20 HP chassis dynamos. | 2nd May 1929 | Box 165 \ 6 img200 | |
| Specification sheet for an armature, detailing its construction and winding data. | 3rd May 1929 | Box 165 \ 6 img201 | |
| Parts and blueprint list for 20 HP Chassis Intermediate Output Dynamos. | 3rd May 1929 | Box 165 \ 6 img202 | |
| Request for the creation of three armature slot diagrams for dynamos and a starter motor. | 7th Jun 1929 | Box 165 \ 6 img203 | |
| Request to have armature slot diagrams drawn for various dynamos and a starter motor. | 7th Jun 1929 | Box 165 \ 6 img204 | |
| From the Experimental Shop regarding the receipt and fitting of Super-Bekelaque insulation parts. | 28th Jun 1929 | Box 165 \ 6 img205 | |
| The production and testing of higher output dynamos for various car models. | 6th Jul 1929 | Box 165 \ 6 img206 | |
| The testing and development of higher and intermediate output dynamos for 40/50 HP and 20 HP chassis. | 1st Jul 1929 | Box 165 \ 6 img207 | |
| The development and testing of new 24-slot armatures with a view towards standardization. | 20th Aug 1929 | Box 165 \ 6 img208 | |
| Cover letter for a requested Armature Slot Diagram blueprint. | 20th Aug 1929 | Box 165 \ 6 img209 | |
| Performance comparison table of dynamo balancing speeds under various conditions. | 20th Aug 1929 | Box 165 \ 6 img210 | |
| Data table detailing performance tests of dynamos for a 20 HP chassis with 57 coil armatures. | 12th Oct 1929 | Box 165 \ 6 img211 | |
| Brief report on the status and specifications of an experimental 20 HP dynamo. | 12th Oct 1929 | Box 165 \ 6 img212 | |
| Checklist of particulars for a dynamo, covering inspection, records, and despatch sections. | 23th Oct 1929 | Box 165 \ 6 img213 | |
| Comparison table of specifications for 20 HP and Phantom 56 coil dynamos. | 29th Oct 1929 | Box 165 \ 6 img214 | |
| The insufficient current output from a 20 HP dynamo. | 16th Nov 1929 | Box 165 \ 6 img215 | |
| Expressing the opinion that the 20 HP dynamo provides insufficient current for the lights and ignition. | 16th Nov 1929 | Box 165 \ 6 img216 | |
| Dynamo output, battery charging, and the development of higher output dynamos for the 20 HP and Phantom II models. | 26th Nov 1929 | Box 165 \ 6 img217 | |
| The development and specifications of Intermediate Output dynamos, comparing their performance to standard and higher output machines. | 28th Nov 1929 | Box 165 \ 6 img218 | |
| Dynamo output for the 20 HP car, comparing it to the Phantom model. | 28th Nov 1929 | Box 165 \ 6 img219 | |
| Record sheet for a 20 HP experimental dynamo, model E.H, detailing testing and disposal. | 1st Jul 1930 | Box 165 \ 6 img220 | |
| Record sheet for a 20 HP experimental dynamo. | 1st Jul 1930 | Box 165 \ 6 img221 | |
| Experimental dynamo record sheet logging tests, modifications, and mileage. | 1st Jul 1930 | Box 165 \ 6 img222 | |
| Experimental dynamo record sheet detailing tests and modifications for unit X 604. | 1st Jul 1936 | Box 165 \ 6 img223 | |
| Test results for determining the optimal brush position on a 20 hp dynamo with a 48 coil armature. | 9th Dec 1924 | Box 165 \ 6 img224 | |
| Machine performance, detailing outputs in amperes at various speeds (rpm). | 8th Dec 1924 | Box 165 \ 6 img225 | |
| Instructions for an experiment on a 24 slot armature concerning air-gap and field winding adjustments. | 8th Dec 1924 | Box 165 \ 6 img226 | |
| Instruction sheet detailing tests on a 30d H.F. coil dynamo using higher pressure control-brush springs. | 17th Dec 1929 | Box 165 \ 6 img227 | |
| Specification sheet for Dynamo Field and Armature conductor sizes for 20 HP and Phantom models. | 17th Dec 1929 | Box 165 \ 6 img228 | |
| Dynamo output for the 20 HP and Phantom II models, addressing insufficiency of charge and development of higher output versions. | 28th Nov 1929 | Box 165 \ 6 img229 | |
| Intermediate output dynamos featuring 'major' and 'minor' output settings. | 28th Nov 1929 | Box 165 \ 6 img230 | |
| Dynamo output tests for the 20 HP car, comparing it to the Phantom model. | 28th Nov 1929 | Box 165 \ 6 img231 | |
| Instructing for experiments on dynamo field coil windings of reduced gauge for 20 HP and Phantom models. | 13th Dec 1929 | Box 165 \ 6 img232 | |
| Calculations and trial results for determining the angles and maximum amperes of a 20 HP Dynamo. | 18th Dec 1929 | Box 165 \ 6 img233 | |
| Performance of the dynamo battery system in relation to demand for the Phantom II and 20 Hp models. | 14th Dec 1929 | Box 165 \ 6 img234 | |
| Dynamo output limitations, safety from over-heating, and design compromises. | 4th Dec 1929 | Box 165 \ 6 img235 | |
| Quoting a previous document on higher output dynamos for the Australian market and suggesting a new design. | 4th Dec 1929 | Box 165 \ 6 img236 | |
| The instability of the dynamo-battery load system and potential overcharging or undercharging issues. | 14th Dec 1929 | Box 165 \ 6 img237 | |
| Technical discussion on vehicle battery charging, starter consumption, and the proposal for automatic dynamo control. | 14th Dec 1923 | Box 165 \ 6 img238 | |
| Description of the various output curves for a 20 HP dynamo. | 14th Dec 1923 | Box 165 \ 6 img239 | |
| Report analysing the performance characteristics of an intermediate output dynamo curve. | 14th Dec 1929 | Box 165 \ 6 img240 | |
| And comparing various output curves for Phantom I and Phantom II armature machines. | 14th Dec 1929 | Box 165 \ 6 img241 | |
| The modification of dynamos for 20 HP and Phantom II models to improve high-speed performance. | 14th Dec 1929 | Box 165 \ 6 img242 | |
| Performance graph of a dynamo for a 20 HP chassis, plotting ampere output and operating voltage against dynamo RPM and chassis MPH. | 1st Dec 1929 | Box 165 \ 6 img243 | |
| Graph showing dynamo output curves for a 20 HP dynamo. | 1st Dec 1929 | Box 165 \ 6 img244 | |
| Performance graph showing Ampere Output and Operating Voltages versus vehicle speed for the 40/50 HP Phantom II chassis. | 14th Dec 1929 | Box 165 \ 6 img245 | |
| Blueprint graph showing horsepower dynamo output curves. | 14th Dec 1929 | Box 165 \ 6 img246 | |
| Performance of the dynamo battery system in relation to driver usage patterns and future development. | 19th Dec 1929 | Box 165 \ 6 img247 | |
| Dynamo capacity and alternative battery charging schemes. | 19th Dec 1929 | Box 165 \ 6 img248 | |
| Performance of the dynamo battery system under various demand conditions. | 27th Dec 1929 | Box 165 \ 6 img249 | |
| Half-charge switching idea for managing dynamo output and battery overcharging. | 27th Dec 1929 | Box 165 \ 6 img250 | |
| Auto charge control system in comparison to other vibrator control systems and its performance. | 27th Dec 1929 | Box 165 \ 6 img251 | |
| Technical comparison of vibrator control systems, including carbon plate regulators and metallic 'dithering' contacts. | 27th Dec 1929 | Box 165 \ 6 img252 | |
| Noisiness of a dynamo and proposing a bimetal thermostat control as a potential solution. | 27th Dec 1929 | Box 165 \ 6 img253 | |
| Move to an intermediate output dynamo and the benefits of a simple battery charge indicator. | 28th Dec 1929 | Box 165 \ 6 img254 | |
| Performance specifications for a 20 HP 48 coil intermediate output dynamo. | 30th Dec 1929 | Box 165 \ 6 img255 | |
| Blueprint diagram illustrating the source of rattles from the front tray of the radiator assembly. | 3rd Feb 1937 | Box 165 \ 7 img001 | |
| Complaints of rattles from Bentley front aprons and a request for a permanent fix. | 3rd Feb 1937 | Box 165 \ 7 img002 | |
| Complaints of rattles from Bentley chassis front aprons and the fitting of additional clips. | 8th Feb 1937 | Box 165 \ 7 img003 | |
| Instrument protection, storage procedures at Hoopers & Co, and issues with faulty clocks. | 10th May 1937 | Box 165 \ 7 img004 | |
| Investigation into noisy speedometers, faulty clocks, and rev drive issues on Bentley cars. | 10th May 1937 | Box 165 \ 7 img005 | |
| Extract about troubleshooting a contact breaker from a roadside repair guide. | 4th May 1937 | Box 165 \ 7 img006 | |
| Faulty Bentley indicator switch and an enclosed translation for Delco Remy Distributors. | 4th May 1937 | Box 165 \ 7 img007 | |
| Responding to a complaint about a noisy Bentley speedometer and rev counter drives. | 28th Aug 1937 | Box 165 \ 7 img008 | |
| Response to a service complaint about instrument dial lighting, proposing the introduction of concave dials as a future remedy. | 3rd Jun 1937 | Box 165 \ 7 img009 | |
| Specifications of the petrol gauge wire for different Bentley models. | 5th Jul 1937 | Box 165 \ 7 img010 | |
| Investigation into failing insulation on the Bentley petrol indicator wire caused by oil saturation. | 21th Jun 1937 | Box 165 \ 7 img011 | |
| The standardization of a Bentley petrol gauge wire. | 24th Jun 1937 | Box 165 \ 7 img012 | |
| Issue with the Bentley 3½ Litre petrol gauge wire softening and a recommended solution. | 16th Jul 1937 | Box 165 \ 7 img014 | |
| Close-up photograph of the starter ring gear teeth after endurance testing. | 19th Jun 1951 | Box 165 \ 7 img015 | |
| The examination and testing of a Simms Starter Motor after removal from a test engine. | 19th Jun 1951 | Box 165 \ 7 img016 | |
| Scheme for the installation of a 5 inch diameter C.A.V. starter motor on a B.40 Mk.2 series engine. | 20th Feb 1951 | Box 165 \ 7 img017 | |
| Instructions regarding the experimental issue of a special alternative motor and its non-interchangeability. | 28th Dec 1943 | Box 165 \ 7 img018 | |
| Blueprint diagram of a starter motor clutch drive assembly for a B40 engine. | 28th Dec 1943 | Box 165 \ 7 img019 | |
| Modifications by Lucas to improve the B40 starter relay hinge between the armature and yoke. | 28th Dec 1943 | Box 165 \ 7 img020 | |
| Blueprint showing the initial and latest electrical circuit arrangements for a Lucas Electrical Helix Starter Motor. | 28th Dec 1943 | Box 165 \ 7 img021 | |
| Sketch of a Lucas Electrical Helix Type Starter Motor, showing the pinion shift arrangement. | 1st Apr 1911 | Box 165 \ 7 img022 | |
| Starter curves graph showing Volts and Amps for a C.A.V. Machine Type SC.126. | 1st Apr 1911 | Box 165 \ 7 img023 | |
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