| Description | Date | Identifier | |
| Request for a report on the test results for a noisy Lucas dynamo fitted to car 2-EX. | 11th Feb 1921 | Box 36 \ 4 scan 188 | |
| Responding to an enquiry about a test on a noisy Lucas Dynamo on car 2-EX. | 18th Feb 1921 | Box 36 \ 4 scan 189 | |
| Prices and availability for various Lucas, Smith, and Rotax dynamo models. | 14th Mar 1921 | Box 36 \ 4 scan 190 | |
| Copy of a letter from The Lucas Electrical Company Ltd. regarding the performance of and improvements to electrical equipment for 20 HP and 40.50 HP cars. | 7th Apr 1921 | Box 36 \ 4 scan 191 | |
| Letter discussing a manufacturing collaboration, detailing advantages and progress on the 40.50 HP car. | 19th Mar 1921 | Box 36 \ 4 scan 192 | |
| Comparing the price and performance of Rotax, Lucas, and Smith dynamos. | 19th Mar 1921 | Box 36 \ 4 scan 193 | |
| Failures and complaints regarding Lucas electrical fittings on post-war chassis. | 8th Apr 1921 | Box 36 \ 4 scan 194 | |
| The failure of fuse wire connections and the need for an in-house improvement. | 19th Mar 1921 | Box 36 \ 4 scan 195 | |
| Bakelite mouldings and a terminal insulating plate produced by Lucas Electrical Co. Ltd. | 12th Apr 1921 | Box 36 \ 4 scan 196 | |
| Correspondence regarding the overhaul and testing of a Dynamo Type E.575, including a report from Lucas Electrical Co. Ltd. | 12th Apr 1921 | Box 36 \ 4 scan 197 | |
| Improved Bakelite Terminal insulating plate and awaiting instructions for Lucas Electrical Co. on a dynamo renovation. | 12th Apr 1921 | Box 36 \ 4 scan 198 | |
| Modifications for a Lucas Dynamo Type E.575, specifically the flexible covering and brushes. | 14th Apr 1921 | Box 36 \ 4 scan 199 | |
| Copy of a letter from The Lucas Electrical Company Ltd. regarding a dynamo for the Goshawk II engine. | 18th Apr 1921 | Box 36 \ 4 scan 200 | |
| Summary of the position of electrical equipment, specifically dynamos, for the 40/50 and Goshawk chassis. | 21th Apr 1921 | Box 36 \ 4 scan 201 | |
| Comparative analysis of various dynamo models and their suitability for use in cars. | 21th Apr 1921 | Box 36 \ 4 scan 202 | |
| Review of dynamo options from Messrs. Lucas, discussing performance issues like 'singing' and proposed modifications. | 21th Apr 1921 | Box 36 \ 4 scan 203 | |
| The testing and specifications of the Smith 2D Dynamo. | 21th Apr 1921 | Box 36 \ 4 scan 204 | |
| Comparison of Smith, Lucas, C.A.V., and Rotax dynamos and their respective cutouts. | 21th Apr 1921 | Box 36 \ 4 scan 205 | |
| The performance, cost, and design considerations of an experimental dynamo made from starter motor parts. | 21th Apr 1921 | Box 36 \ 4 scan 206 | |
| Comparison of different dynamo models for small and large cars, detailing specifications and prices. | 21th Apr 1921 | Box 36 \ 4 scan 207 | |
| The design and production cost of a dynamo for the Goshawk engine. | 21th Apr 1921 | Box 36 \ 4 scan 208 | |
| Suitability of Large A.400 Lucas Dynamos compared to the standard E.575. | 6th May 1921 | Box 36 \ 4 scan 209 | |
| Recommendation to cease using Lucas electrical equipment due to persistent failures with dynamos, cutouts, and fuses. | 9th Jun 1921 | Box 36 \ 4 scan 210 | |
| Urgent need to source satisfactory electrical equipment, rejecting Lucas parts and suggesting alternatives from Smith, Bleriot, or the U.S.A. | 13th Jun 1921 | Box 36 \ 4 scan 211 | |
| Copy of a telegram from Basil Johnson in London to Roycar in Derby concerning electrical equipment stock. | 13th Jun 1921 | Box 36 \ 4 scan 212 | |
| Extract from a conference discussing dynamo voltage control experiments and supply modifications with Lucas Elect. Co. | 13th Jun 1921 | Box 36 \ 4 scan 213 | |
| Extract from a conference minute regarding issues with a dynamo's cutting-in speed and interactions with Lucas Electrical Co. | 13th Jun 1921 | Box 36 \ 4 scan 214 | |
| Expressing dissatisfaction with Lucas dynamos and cutouts, and considering alternatives from Smiths and Bleriot. | 18th Jun 1921 | Box 36 \ 4 scan 215 | |
| Klaxon switches and Dynamo/Cutout systems for cars returned from America. | 17th Jun 1921 | Box 36 \ 4 scan 216 | |
| Blame for the failure of Lucas electrical equipment on cars. | 18th Jun 1921 | Box 36 \ 4 scan 217 | |
| Unsatisfactory equipment purchased from the Lucas Company. | 18th Jun 1921 | Box 36 \ 4 scan 218 | |
| Meeting with Mr. Royce concerning issues with Lucas accessories and a new cut-out design. | 20th Jun 1921 | Box 36 \ 4 scan 219 | |
| Modified Dynamo, a cut-out, and the performance of the supplier, Lucas. | 20th Jun 1921 | Box 36 \ 4 scan 220 | |
| Confirming a meeting with Lucas Electrical Co. Ltd. to discuss electrical equipment. | 21th Jun 1921 | Box 36 \ 4 scan 221 | |
| Minutes of a conference with Lucas Electrical Co. Ltd. discussing issues with their electrical equipment. | 22th Jun 1921 | Box 36 \ 4 scan 222 | |
| Summary of agreements with Lucas regarding the modification and supply of various automotive electrical components. | 30th Jun 1921 | Box 36 \ 4 scan 223 | |
| Notification of the receipt of six sets of E.G.O. Lucas dynamo brushes. | 30th Jun 1921 | Box 36 \ 4 scan 224 | |
| Trial of new E.G.O Morganite brushes for the Lucas E.575 dynamo. | 1st Jul 1921 | Box 36 \ 4 scan 225 | |
| Contractual issues and dissatisfaction with electrical equipment from the Lucas Company. | 1st Jul 1921 | Box 36 \ 4 scan 226 | |
| Review of potential issues with a 1-inch longer dynamo, brush holders, a cutout, and fuses. | 1st Jul 1921 | Box 36 \ 4 scan 227 | |
| Continued discussion on dynamo reliability, proposing solutions and noting issues with batteries and belt tension. | 1st Jul 1921 | Box 36 \ 4 scan 228 | |
| Unreliability of Lucas electrical equipment and proposing the purchase of American dynamos as a more cost-effective solution. | 2nd Jul 1921 | Box 36 \ 4 scan 229 | |
| Typed report on the poor performance of Lucas electrical graphite and the reliability of fuses. | 2nd Jul 1921 | Box 36 \ 4 scan 230 | |
| The supply, alteration, and costs of Lucas dynamos for the 40/50 HP chassis. | 7th Jul 1921 | Box 36 \ 4 scan 231 | |
| Dynamo supply negotiations with Lucas, covering pricing, specifications, and quality assurances. | 1st Oct 1933 | Box 36 \ 4 scan 232 | |
| Unsatisfactory output of the Lucas Dynamo and proposing a 1' longer version for the 40/50 chassis. | 7th Jul 1921 | Box 36 \ 4 scan 233 | |
| Impact of changing axle parts on dynamo cutting-in speed. | 1st Jul 1921 | Box 36 \ 4 scan 234 | |
| The efficiency testing of a rewound Lucas Dynamo armature. | 21th Jul 1921 | Box 36 \ 4 scan 235 | |
| Rewinding and testing of a Lucas lighting dynamo armature. | 22th Jul 1921 | Box 36 \ 4 scan 236 | |
| Instruction sheet comparing the electrical resistance of R.R. and Lucas windings on a Lucas armature core. | 8th Aug 1921 | Box 36 \ 4 scan 237 | |
| The performance comparison of a re-wound Lucas E.575 dynamo armature against the standard winding. | 11th Aug 1921 | Box 36 \ 4 scan 238 | |
| Technical discussion on modifying the winding specifications of an armature for a Lucas dynamo. | 11th Aug 1921 | Box 36 \ 4 scan 239 | |
| Typed memo discussing the return of a dynamo and providing instructions to a Mr. Gamble. | 11th Aug 1921 | Box 36 \ 4 scan 240 | |
| Test results for R.R. Wound Lucas Dynamos, recording performance metrics over time. | 18th Aug 1921 | Box 36 \ 4 scan 241 | |
| Request to inspect and report on the condition of E.G.C. Morganite brushes fitted to E.575 dynamos. | 7th Sep 1921 | Box 36 \ 4 scan 242 | |
| Re-test of a lengthened Lucas dynamo and advising against its use due to potential issues. | 9th Nov 1921 | Box 36 \ 4 scan 243 | |
| Instruction sheet detailing the power required to drive a Lucas E575 Dynamo. | 10th Nov 1921 | Box 36 \ 4 scan 244 | |
| Test results for the power required to operate a Lucas E.575 dynamo. | 11th Nov 1921 | Box 36 \ 4 scan 245 | |
| Unsuccessful test to improve a Standard Lucas E.575 Dynamo by altering its winding. | 15th Nov 1921 | Box 36 \ 4 scan 246 | |
| Letter to Chloride Elec. Storage Co. Ltd. enclosing volt-ampere characteristic curves for a Lucas E.575 dynamo. | 8th Mar 1922 | Box 36 \ 4 scan 247 | |
| Letter from Chloride Electrical Storage Co. Ltd. acknowledging receipt of volt-ampere characteristic curves for a 40/50 chassis. | 9th Mar 1922 | Box 36 \ 4 scan 248 | |
| Dynamo output characteristics and solutions for the 40/50 chassis electrical equipment. | 22th Jun 1922 | Box 36 \ 4 scan 249 | |
| New Lucas Electrical Co. Ltd. repair depot in Manchester. | 12th Sep 1922 | Box 36 \ 4 scan 250 | |
| The choice of dynamo for the 40/50 Chassis 'R' Series. | 29th Sep 1922 | Box 36 \ 4 scan 251 | |
| Performance graph comparing different dynamo windings based on ampere output versus RPM under hot conditions. | 21th Mar 1923 | Box 36 \ 4 scan 252 | |
| Reverse of a document showing a Print Room stamp from the Derby factory. | 21th Mar 1923 | Box 36 \ 4 scan 253 | |
| Letter from Lucas Electrical Co. Ltd. concerning the examination and repair of a dynamo returned due to bearing noise. | 28th Nov 1923 | Box 36 \ 4 scan 254 | |
| Performance comparison of E.A.C. and Lucas E.575 dynamos with varying temperatures, belt drive ratios and pole piece materials. | 5th Dec 1923 | Box 36 \ 4 scan 255 | |
| Confirming the Lucas Carcase Dynamo No. 85Z has passed production tests and is ready for production. | 2nd Feb 1924 | Box 36 \ 4 scan 256 | |
| Production test report for a Lucas Dynamo marked 85Z. | 12th Feb 1924 | Box 36 \ 4 scan 257 | |
| Secret memorandum discussing gearbox casings and potential dynamo changes to address output and overheating issues. | 23th Feb 1924 | Box 36 \ 4 scan 258 | |
| Secret memo regarding the decision to continue using Lucas dynamos and a suggestion to re-wind armatures in-house. | 4th Mar 1924 | Box 36 \ 4 scan 259 | |
| Graph of current versus speed for a Lucas Dynamo Lighting Set with a 12-volt battery. | 4th Mar 1924 | Box 36 \ 4 scan 260 | |
| Cover page for a document on the output curves of a Lucas Dynamo Lighting Set. | 5th May 1924 | Box 36 \ 4 scan 261 | |
| Reported 40-50% loss of output on Lucas Dynamos and arranging further investigation. | 5th May 1924 | Box 36 \ 4 scan 262 | |
| Clarifying a request for information from Messrs. Lucas regarding dynamo insulation resistance when hot and cold. | 8th May 1924 | Box 36 \ 4 scan 263 | |
| Request to examine a faulty Lucas dynamo from chassis 9-PK that has returned from France. | 11th Jun 1924 | Box 36 \ 4 scan 264 | |
| Request for assistance with removing a difficult coupling on a Lucas Dynamo from car 9-PK. | 19th Jun 1924 | Box 36 \ 4 scan 265 | |
| Two faults found in a Lucas E.575 Dynamo armature that was run on an experimental car. | 26th Jun 1924 | Box 36 \ 4 scan 266 | |
| Letter regarding the return of an unsatisfactory Lucas E.575 type Dynamo armature. | 27th Jun 1924 | Box 36 \ 4 scan 267 | |
| The armature for a Lucas dynamo on an experimental chassis. | 30th Jun 1924 | Box 36 \ 4 scan 268 | |
| Correspondence with Lucas Electrical Co. about the repair and replacement of a dynamo armature for an experimental chassis. | 4th Jul 1924 | Box 36 \ 4 scan 269 | |
| The commutator to be skimmed and armature connections re-soldered on a Lucas Dynamo R.205 from car 98-NK. | 20th Aug 1924 | Box 36 \ 4 scan 270 | |
| Performance specifications for the Lucas E.575T dynamo under various conditions. | 26th Nov 1924 | Box 36 \ 4 scan 271 | |
| Conversion of specific chassis to use a Lucas dynamo and switchbox. | 1st Dec 1924 | Box 36 \ 4 scan 272 | |
| Performance graph for a Lucas C.5 12V dynamo, plotting ampere output and voltage against RPM and vehicle speed. | 30th May 1930 | Box 36 \ 4 scan 273 | |
| Blank folded document with a handwritten reference number and a date stamp. | 9th May 1930 | Box 36 \ 4 scan 274 | |
| Performance graph for a C5R Dynamo, plotting Volts and Amps against RPM under hot and cold conditions. | 25th Jun 1930 | Box 36 \ 4 scan 275 | |
| Request to arrange payment to keep a Lucas Dynamo Type C5-O N-O previously acquired on loan. | 1st Jun 1931 | Box 36 \ 4 scan 276 | |
| Request for special parts to fit an engine with a Bosch magneto, with notes on ignition system requirements. | 13th Nov 1913 | Box 37 \ 1 scan 001 | |
| Standard fitment and positioning of batteries in the car frame. | 29th Jan 1914 | Box 37 \ 1 scan 002 | |
| Battery box materials and battery specifications for self-starters. | 29th Jan 1914 | Box 37 \ 1 scan 003 | |
| Tests on substituting hand magnetos with coil ignition for starting. | 10th Jul 1917 | Box 37 \ 1 scan 004 | |
| Modifying a battery ignition system for cars equipped with a 12-volt self-starter. | 10th Jul 1917 | Box 37 \ 1 scan 005 | |
| Engine condenser positioning and size to protect platinum points, and the decision to use electric starters post-war. | 10th Jul 1917 | Box 37 \ 1 scan 006 | |
| Page discussing the synchronization of trembler ignition systems. | 1st Jul 1917 | Box 37 \ 1 scan 007 | |
| Letter to the Air Board discussing improvements to magneto ignition systems for engines. | 21th Aug 1917 | Box 37 \ 1 scan 008 | |
| Magneto fitment and the development of a battery ignition system for the 'Eagle' aero engine. | 26th Apr 1917 | Box 37 \ 1 scan 009 | |
| Extract from a letter to Commander Bristow regarding the development of a battery ignition system for aero engines. | 26th Apr 1917 | Box 37 \ 1 scan 010 | |
| Modifications to the controls for a Magneto Remy-Ignition system. | 13th Oct 1917 | Box 37 \ 1 scan 011 | |
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