Rolls-Royce Archives
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
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Request for a report on the test results for a noisy Lucas dynamo fitted to car 2-EX.11th Feb 1921Box 36 \ 4  scan 188
Responding to an enquiry about a test on a noisy Lucas Dynamo on car 2-EX.18th Feb 1921Box 36 \ 4  scan 189
Prices and availability for various Lucas, Smith, and Rotax dynamo models.14th Mar 1921Box 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 1921Box 36 \ 4  scan 191
Letter discussing a manufacturing collaboration, detailing advantages and progress on the 40.50 HP car.19th Mar 1921Box 36 \ 4  scan 192
Comparing the price and performance of Rotax, Lucas, and Smith dynamos.19th Mar 1921Box 36 \ 4  scan 193
Failures and complaints regarding Lucas electrical fittings on post-war chassis.8th Apr 1921Box 36 \ 4  scan 194
The failure of fuse wire connections and the need for an in-house improvement.19th Mar 1921Box 36 \ 4  scan 195
Bakelite mouldings and a terminal insulating plate produced by Lucas Electrical Co. Ltd.12th Apr 1921Box 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 1921Box 36 \ 4  scan 197
Improved Bakelite Terminal insulating plate and awaiting instructions for Lucas Electrical Co. on a dynamo renovation.12th Apr 1921Box 36 \ 4  scan 198
Modifications for a Lucas Dynamo Type E.575, specifically the flexible covering and brushes.14th Apr 1921Box 36 \ 4  scan 199
Copy of a letter from The Lucas Electrical Company Ltd. regarding a dynamo for the Goshawk II engine.18th Apr 1921Box 36 \ 4  scan 200
Summary of the position of electrical equipment, specifically dynamos, for the 40/50 and Goshawk chassis.21th Apr 1921Box 36 \ 4  scan 201
Comparative analysis of various dynamo models and their suitability for use in cars.21th Apr 1921Box 36 \ 4  scan 202
Review of dynamo options from Messrs. Lucas, discussing performance issues like 'singing' and proposed modifications.21th Apr 1921Box 36 \ 4  scan 203
The testing and specifications of the Smith 2D Dynamo.21th Apr 1921Box 36 \ 4  scan 204
Comparison of Smith, Lucas, C.A.V., and Rotax dynamos and their respective cutouts.21th Apr 1921Box 36 \ 4  scan 205
The performance, cost, and design considerations of an experimental dynamo made from starter motor parts.21th Apr 1921Box 36 \ 4  scan 206
Comparison of different dynamo models for small and large cars, detailing specifications and prices.21th Apr 1921Box 36 \ 4  scan 207
The design and production cost of a dynamo for the Goshawk engine.21th Apr 1921Box 36 \ 4  scan 208
Suitability of Large A.400 Lucas Dynamos compared to the standard E.575.6th May 1921Box 36 \ 4  scan 209
Recommendation to cease using Lucas electrical equipment due to persistent failures with dynamos, cutouts, and fuses.9th Jun 1921Box 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 1921Box 36 \ 4  scan 211
Copy of a telegram from Basil Johnson in London to Roycar in Derby concerning electrical equipment stock.13th Jun 1921Box 36 \ 4  scan 212
Extract from a conference discussing dynamo voltage control experiments and supply modifications with Lucas Elect. Co.13th Jun 1921Box 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 1921Box 36 \ 4  scan 214
Expressing dissatisfaction with Lucas dynamos and cutouts, and considering alternatives from Smiths and Bleriot.18th Jun 1921Box 36 \ 4  scan 215
Klaxon switches and Dynamo/Cutout systems for cars returned from America.17th Jun 1921Box 36 \ 4  scan 216
Blame for the failure of Lucas electrical equipment on cars.18th Jun 1921Box 36 \ 4  scan 217
Unsatisfactory equipment purchased from the Lucas Company.18th Jun 1921Box 36 \ 4  scan 218
Meeting with Mr. Royce concerning issues with Lucas accessories and a new cut-out design.20th Jun 1921Box 36 \ 4  scan 219
Modified Dynamo, a cut-out, and the performance of the supplier, Lucas.20th Jun 1921Box 36 \ 4  scan 220
Confirming a meeting with Lucas Electrical Co. Ltd. to discuss electrical equipment.21th Jun 1921Box 36 \ 4  scan 221
Minutes of a conference with Lucas Electrical Co. Ltd. discussing issues with their electrical equipment.22th Jun 1921Box 36 \ 4  scan 222
Summary of agreements with Lucas regarding the modification and supply of various automotive electrical components.30th Jun 1921Box 36 \ 4  scan 223
Notification of the receipt of six sets of E.G.O. Lucas dynamo brushes.30th Jun 1921Box 36 \ 4  scan 224
Trial of new E.G.O Morganite brushes for the Lucas E.575 dynamo.1st Jul 1921Box 36 \ 4  scan 225
Contractual issues and dissatisfaction with electrical equipment from the Lucas Company.1st Jul 1921Box 36 \ 4  scan 226
Review of potential issues with a 1-inch longer dynamo, brush holders, a cutout, and fuses.1st Jul 1921Box 36 \ 4  scan 227
Continued discussion on dynamo reliability, proposing solutions and noting issues with batteries and belt tension.1st Jul 1921Box 36 \ 4  scan 228
Unreliability of Lucas electrical equipment and proposing the purchase of American dynamos as a more cost-effective solution.2nd Jul 1921Box 36 \ 4  scan 229
Typed report on the poor performance of Lucas electrical graphite and the reliability of fuses.2nd Jul 1921Box 36 \ 4  scan 230
The supply, alteration, and costs of Lucas dynamos for the 40/50 HP chassis.7th Jul 1921Box 36 \ 4  scan 231
Dynamo supply negotiations with Lucas, covering pricing, specifications, and quality assurances.1st Oct 1933Box 36 \ 4  scan 232
Unsatisfactory output of the Lucas Dynamo and proposing a 1' longer version for the 40/50 chassis.7th Jul 1921Box 36 \ 4  scan 233
Impact of changing axle parts on dynamo cutting-in speed.1st Jul 1921Box 36 \ 4  scan 234
The efficiency testing of a rewound Lucas Dynamo armature.21th Jul 1921Box 36 \ 4  scan 235
Rewinding and testing of a Lucas lighting dynamo armature.22th Jul 1921Box 36 \ 4  scan 236
Instruction sheet comparing the electrical resistance of R.R. and Lucas windings on a Lucas armature core.8th Aug 1921Box 36 \ 4  scan 237
The performance comparison of a re-wound Lucas E.575 dynamo armature against the standard winding.11th Aug 1921Box 36 \ 4  scan 238
Technical discussion on modifying the winding specifications of an armature for a Lucas dynamo.11th Aug 1921Box 36 \ 4  scan 239
Typed memo discussing the return of a dynamo and providing instructions to a Mr. Gamble.11th Aug 1921Box 36 \ 4  scan 240
Test results for R.R. Wound Lucas Dynamos, recording performance metrics over time.18th Aug 1921Box 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 1921Box 36 \ 4  scan 242
Re-test of a lengthened Lucas dynamo and advising against its use due to potential issues.9th Nov 1921Box 36 \ 4  scan 243
Instruction sheet detailing the power required to drive a Lucas E575 Dynamo.10th Nov 1921Box 36 \ 4  scan 244
Test results for the power required to operate a Lucas E.575 dynamo.11th Nov 1921Box 36 \ 4  scan 245
Unsuccessful test to improve a Standard Lucas E.575 Dynamo by altering its winding.15th Nov 1921Box 36 \ 4  scan 246
Letter to Chloride Elec. Storage Co. Ltd. enclosing volt-ampere characteristic curves for a Lucas E.575 dynamo.8th Mar 1922Box 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 1922Box 36 \ 4  scan 248
Dynamo output characteristics and solutions for the 40/50 chassis electrical equipment.22th Jun 1922Box 36 \ 4  scan 249
New Lucas Electrical Co. Ltd. repair depot in Manchester.12th Sep 1922Box 36 \ 4  scan 250
The choice of dynamo for the 40/50 Chassis 'R' Series.29th Sep 1922Box 36 \ 4  scan 251
Performance graph comparing different dynamo windings based on ampere output versus RPM under hot conditions.21th Mar 1923Box 36 \ 4  scan 252
Reverse of a document showing a Print Room stamp from the Derby factory.21th Mar 1923Box 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 1923Box 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 1923Box 36 \ 4  scan 255
Confirming the Lucas Carcase Dynamo No. 85Z has passed production tests and is ready for production.2nd Feb 1924Box 36 \ 4  scan 256
Production test report for a Lucas Dynamo marked 85Z.12th Feb 1924Box 36 \ 4  scan 257
Secret memorandum discussing gearbox casings and potential dynamo changes to address output and overheating issues.23th Feb 1924Box 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 1924Box 36 \ 4  scan 259
Graph of current versus speed for a Lucas Dynamo Lighting Set with a 12-volt battery.4th Mar 1924Box 36 \ 4  scan 260
Cover page for a document on the output curves of a Lucas Dynamo Lighting Set.5th May 1924Box 36 \ 4  scan 261
Reported 40-50% loss of output on Lucas Dynamos and arranging further investigation.5th May 1924Box 36 \ 4  scan 262
Clarifying a request for information from Messrs. Lucas regarding dynamo insulation resistance when hot and cold.8th May 1924Box 36 \ 4  scan 263
Request to examine a faulty Lucas dynamo from chassis 9-PK that has returned from France.11th Jun 1924Box 36 \ 4  scan 264
Request for assistance with removing a difficult coupling on a Lucas Dynamo from car 9-PK.19th Jun 1924Box 36 \ 4  scan 265
Two faults found in a Lucas E.575 Dynamo armature that was run on an experimental car.26th Jun 1924Box 36 \ 4  scan 266
Letter regarding the return of an unsatisfactory Lucas E.575 type Dynamo armature.27th Jun 1924Box 36 \ 4  scan 267
The armature for a Lucas dynamo on an experimental chassis.30th Jun 1924Box 36 \ 4  scan 268
Correspondence with Lucas Electrical Co. about the repair and replacement of a dynamo armature for an experimental chassis.4th Jul 1924Box 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 1924Box 36 \ 4  scan 270
Performance specifications for the Lucas E.575T dynamo under various conditions.26th Nov 1924Box 36 \ 4  scan 271
Conversion of specific chassis to use a Lucas dynamo and switchbox.1st Dec 1924Box 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 1930Box 36 \ 4  scan 273
Blank folded document with a handwritten reference number and a date stamp.9th May 1930Box 36 \ 4  scan 274
Performance graph for a C5R Dynamo, plotting Volts and Amps against RPM under hot and cold conditions.25th Jun 1930Box 36 \ 4  scan 275
Request to arrange payment to keep a Lucas Dynamo Type C5-O N-O previously acquired on loan.1st Jun 1931Box 36 \ 4  scan 276
Request for special parts to fit an engine with a Bosch magneto, with notes on ignition system requirements.13th Nov 1913Box 37 \ 1  scan 001
Standard fitment and positioning of batteries in the car frame.29th Jan 1914Box 37 \ 1  scan 002
Battery box materials and battery specifications for self-starters.29th Jan 1914Box 37 \ 1  scan 003
Tests on substituting hand magnetos with coil ignition for starting.10th Jul 1917Box 37 \ 1  scan 004
Modifying a battery ignition system for cars equipped with a 12-volt self-starter.10th Jul 1917Box 37 \ 1  scan 005
Engine condenser positioning and size to protect platinum points, and the decision to use electric starters post-war.10th Jul 1917Box 37 \ 1  scan 006
Page discussing the synchronization of trembler ignition systems.1st Jul 1917Box 37 \ 1  scan 007
Letter to the Air Board discussing improvements to magneto ignition systems for engines.21th Aug 1917Box 37 \ 1  scan 008
Magneto fitment and the development of a battery ignition system for the 'Eagle' aero engine.26th Apr 1917Box 37 \ 1  scan 009
Extract from a letter to Commander Bristow regarding the development of a battery ignition system for aero engines.26th Apr 1917Box 37 \ 1  scan 010
Modifications to the controls for a Magneto Remy-Ignition system.13th Oct 1917Box 37 \ 1  scan 011


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