| Description | Date | Identifier | |
| Continuation sheet of a letter from Joseph Sankey & Sons, Limited. | 14th Nov 1933 | Box 60 \ 4 Scan194 | |
| Instruction to modify the dynamo lubrication on chassis 27-EX. | 21th Nov 1933 | Box 60 \ 4 Scan195 | |
| Request to arrange for the rebuilding of an experimental dynamo armature with Sankeys No.41 quality Stalloy iron stampings. | 29th Nov 1933 | Box 60 \ 4 Scan196 | |
| Letter to a supplier regarding test results for 'Stalloy' stampings and requesting a new batch of a different material. | 15th Dec 1933 | Box 60 \ 4 Scan197 | |
| Letter from Joseph Sankey & Sons regarding the quality of stampings and a new sample of 'Extra Special Stalloy'. | 16th Dec 1933 | Box 60 \ 4 Scan198 | |
| Contentious method of lubricating a dynamo bearing and acknowledging poor accessibility. | 23th Dec 1933 | Box 60 \ 4 Scan199 | |
| Letter from Joseph Sankey & Sons, Ltd. confirming the dispatch of a sample set of Armature stampings. | 3rd Jan 1940 | Box 60 \ 4 Scan200 | |
| Drawing for an eccentrically mounted dynamo pinion for the Phantom model. | 5th Jan 1934 | Box 60 \ 4 Scan201 | |
| Letter to Messrs. Joseph Sankey & Sons Ltd. acknowledging receipt of stampings which will be tested. | 8th Jan 1934 | Box 60 \ 4 Scan202 | |
| Request to rebuild an experimental 20/25 dynamo armature with special stampings. | 8th Jan 1934 | Box 60 \ 4 Scan203 | |
| Request for details to be made up for a dynamo and starter test rig. | 1st Feb 1934 | Box 60 \ 4 Scan204 | |
| Blueprint of a machined shaft with threaded ends and varying diameters. | 1st Feb 1934 | Box 60 \ 4 Scan205 | |
| Blueprint for a fixing plate with a concentric slot and markings in degrees. | 1st Feb 1934 | Box 60 \ 4 Scan206 | |
| Technical drawing for a Brush Holder. | 1st Feb 1934 | Box 60 \ 4 Scan207 | |
| Investigating a suggestion about car dynamos, concluding it is not practical. | 6th Feb 1934 | Box 60 \ 4 Scan208 | |
| Practicality and efficiency of a car dynamo scheme, considering an experimental trial. | 7th Feb 1934 | Box 60 \ 4 Scan209 | |
| Specification to change the thickness of dynamo armature stampings to reduce iron loss. | 9th Feb 1934 | Box 60 \ 4 Scan210 | |
| The decision to build additional sets of Scheme 481 dynamos for testing. | 9th Mar 1934 | Box 60 \ 4 Scan211 | |
| Letter to Joseph Sankey & Sons Ltd. inquiring about the quality of iron in dynamo stampings. | 15th Mar 1934 | Box 60 \ 4 Scan212 | |
| Letter from Joseph Sankey & Sons, Ltd. clarifying the meaning of stampings on supplied parts. | 16th Mar 1934 | Box 60 \ 4 Scan213 | |
| Report from the U.S.A. discussing La Salle dynamo air cooling and Chevrolet starter motors. | 16th Mar 1934 | Box 60 \ 4 Scan214 | |
| Letter from Delco-Remy Corporation concerning Chevrolet and La Salle generator specifications and direction indicators. | 3rd Feb 1934 | Box 60 \ 4 Scan215 | |
| Request to manufacture one set of pole pieces for an R.R.Sch.481 dynamo. | 5th Apr 1934 | Box 60 \ 4 Scan216 | |
| Request to remove the dynamo on 4.B.IV and replace it with an experimental Bentley dynamo for examination. | 12th Apr 1934 | Box 60 \ 4 Scan217 | |
| Letter from Delco-Remy Corporation responding to queries about armature balancing and generator temperature. | 25th Apr 1934 | Box 60 \ 4 Scan218 | |
| Performance graph of generator EX.17431 showing Amperes vs RPM under various conditions. | 14th Nov 1933 | Box 60 \ 4 Scan219 | |
| Performance graph for a generator plotting Amperes against R.P.M. under hot/cold and lights on/off conditions. | 14th Nov 1933 | Box 60 \ 4 Scan220 | |
| Error in dynamo stamping thickness, cancelling one order and placing new ones with corrected specifications. | 2nd May 1934 | Box 60 \ 4 Scan221 | |
| Request to arrange for the field rewinding of an experimental dynamo for the 'Spectre' chassis. | 4th Jun 1934 | Box 60 \ 4 Scan222 | |
| Experiments to increase dynamo output using air cooling to reduce its size for the Bentley. | 22th Jun 1934 | Box 60 \ 4 Scan223 | |
| Modifications for improving dynamo cooling on the Spectre chassis. | 28th Jun 1934 | Box 60 \ 4 Scan224 | |
| Graph of speed-output curves for the R.R. Sch 481 and Lucas C5H dynamos. | 4th Jul 1934 | Box 60 \ 4 Scan225 | |
| Request to prepare an experimental set of field poles for a dynamo RC3 in the laboratory. | 4th Jul 1934 | Box 60 \ 4 Scan226 | |
| Letter to Joseph Lucas Research Laboratories requesting a report and comments on a 20/25 dynamo. | 7th Aug 1934 | Box 60 \ 4 Scan227 | |
| Letter from Joseph Lucas Limited regarding a report comparing dynamo machines. | 24th Aug 1934 | Box 60 \ 4 Scan228 | |
| Internal order for two shoes and one pulley for a Dynamo Test Rig. | 1st Sep 1934 | Box 60 \ 4 Scan229 | |
| Request to make one set of dynamo field poles for the Spectre Dynamo, as per drawing EL.29. | 24th Sep 1934 | Box 60 \ 4 Scan230 | |
| Request to manufacture an experimental Spectre dynamo according to specific drawings and materials. | 25th Sep 1934 | Box 60 \ 4 Scan231 | |
| Letter to Joseph Lucas Ltd. requesting blueprints for a Lucas Model E3D-3 motor cycle dynamo. | 26th Sep 1934 | Box 60 \ 4 Scan232 | |
| Letter from Joseph Lucas Limited regarding the enclosure of wiring diagrams for a Dynamo Type E3D. | 27th Sep 1934 | Box 60 \ 4 Scan233 | |
| Letter from Joseph Lucas Research Laboratories regarding a replacement E3D armature for a dynamo. | 8th Oct 1934 | Box 60 \ 4 Scan234 | |
| Experimental department report on chassis dynamo cooling air flow. | 8th Oct 1934 | Box 60 \ 4 Scan235 | |
| Tests measuring the cooling air flow through a fan-cooled chassis dynamo. | 18th Oct 1934 | Box 60 \ 4 Scan236 | |
| Schematic diagram detailing an air-flow test for a dynamo. | 12th Oct 1934 | Box 60 \ 4 Scan237 | |
| Requesting urgent production of special air-cooled dynamos required for cars fitted with radios. | 29th Oct 1934 | Box 60 \ 4 Scan238 | |
| Suggestion to dynamically balance dynamo armatures to reduce commutator sparking and increase output, particularly for the Bentley chassis. | 28th Nov 1934 | Box 60 \ 4 Scan239 | |
| Letter to The Morgan Crucible Co. Ltd. discussing comparative testing of dynamo brushes and requesting product recommendations. | 1st Dec 1934 | Box 60 \ 4 Scan240 | |
| Internal order request for two sets of spare brushes for a Delco-Remy air-cooled generator. | 7th Dec 1934 | Box 60 \ 4 Scan241 | |
| Request for one set of dynamo field poles to be made up to drawing EL29. | 7th Dec 1934 | Box 60 \ 4 Scan242 | |
| Requesting design action on the R.R. Dynamo Cutout due to excessive volt drop and temperature rise. | 17th Dec 1934 | Box 60 \ 4 Scan243 | |
| Request for a replacement 5HP D.C. motor for the Experimental Electrical Department's dynamo rigs. | 17th Dec 1934 | Box 60 \ 4 Scan244 | |
| Request to produce another ventilated dynamo for chassis testing. | 19th Dec 1934 | Box 60 \ 4 Scan245 | |
| Letter from The Morgan Crucible Company Ltd. regarding arranging a visit from Mr. Sparkes. | 19th Dec 1934 | Box 60 \ 4 Scan246 | |
| Letter from The Morgan Crucible Company Ltd. arranging a meeting for Mr. Sparkes. | 20th Dec 1934 | Box 60 \ 4 Scan247 | |
| Letter to The Morgan Crucible Co. Ltd. rescheduling a visit due to annual stock-taking. | 27th Dec 1934 | Box 60 \ 4 Scan248 | |
| Request to modify the fan on a ventilated dynamo to reduce noise. | 27th Dec 1934 | Box 60 \ 4 Scan249 | |
| Modification drawing for a dynamo fan, showing front and section views. | 28th Dec 1934 | Box 60 \ 4 Scan250 | |
| Letter from The Morgan Crucible Company Ltd. confirming travel arrangements for a Mr. Sparkes. | 29th Dec 1934 | Box 60 \ 4 Scan251 | |
| Request to examine a Dynamo Test Rig with a noisy bearing and untrue pulley. | 6th Oct 1936 | Box 60 \ 4 Scan252 | |
| Faulty dynamo on Test Bed 2c, requesting maintenance. | 27th Oct 1936 | Box 60 \ 4 Scan253 | |
| Request for the Experimental Department to be supplied with two standard Exide batteries. | 2nd Jul 1923 | Box 61 \ 1 scan0001 | |
| Request to supply the Experimental Department with two standard Exide batteries for general purposes. | 11th Jul 1923 | Box 61 \ 1 scan0002 | |
| Request to order 12 Exide type M.A.2 cells from the Chloride Company for the Experimental Department. | 24th Jan 1920 | Box 61 \ 1 scan0003 | |
| Letter to The Chloride Elec. Storage Co. Ltd. requesting particulars for 8 cells of 200 ampere-hour capacity. | 21th Dec 1923 | Box 61 \ 1 scan0004 | |
| Quotation from The Chloride Electrical Storage Company for Exide-Ironclad battery cells. | 28th Dec 1923 | Box 61 \ 1 scan0005 | |
| Estimate for eight Exide-Ironclad cells from The Chloride Electrical Storage Company. | 28th Dec 1923 | Box 61 \ 1 scan0006 | |
| Layout drawing for four LVN 6 battery cells in a tray. | 28th Dec 1923 | Box 61 \ 1 scan0007 | |
| Technical drawing for a case or battery box, showing dimensions and a mirrored parts list. | 26th Apr 1917 | Box 61 \ 1 scan0008 | |
| Parts list for an Epicyclic Gear, detailing piece numbers, descriptions, quantity per engine, and weight. | 2nd Jan 1924 | Box 61 \ 1 scan0009 | |
| Request for particulars on 'Exide-Ironclad' cells and terminal tappings. | 2nd Jan 1924 | Box 61 \ 1 scan0010 | |
| Letter from a battery supplier discussing options for 'Exide-Ironclad' cells and connectors. | 4th Jan 1924 | Box 61 \ 1 scan0011 | |
| Replacement of battery cells for the Electrical Experimental Laboratory. | 7th Jan 1924 | Box 61 \ 1 scan0012 | |
| Letter extract discussing the requirements for an eight-cell, 200 ampere-hour battery for starter motor testing. | 8th Jan 1924 | Box 61 \ 1 scan0013 | |
| Letter from an accumulator manufacturer providing details and pricing for large laboratory battery cells. | 15th Jan 1924 | Box 61 \ 1 scan0014 | |
| Quotation from Peto & Radford Co. for large battery cells for the experimental electrical laboratory. | 16th Jan 1924 | Box 61 \ 1 scan0015 | |
| Letter to Messrs. Peto & Radford requesting overall dimensions for eight large capacity cells. | 23th Jan 1924 | Box 61 \ 1 scan0016 | |
| Letter from Peto & Radford regarding the dimensions of 9-plate and 11-plate 'FA' type cells. | 24th Jan 1924 | Box 61 \ 1 scan0017 | |
| Requesting an order for eight large FA.11 cells for the Electrical Experimental Laboratory. | 28th Jan 1924 | Box 61 \ 1 scan0018 | |
| Letter from Peto & Radford regarding the supply and discussion of batteries for testing. | 20th Mar 1924 | Box 61 \ 1 scan0019 | |
| Letter to Messrs. Peto & Radford discussing the charging and discharging parameters of electrical cells. | 21th Mar 1924 | Box 61 \ 1 scan0020 | |
| Letter discussing the charging and discharging of battery cells, including a postscript about adding oil to the electrolyte. | 27th Mar 1924 | Box 61 \ 1 scan0021 | |
| Letter from accumulator manufacturers Peto & Radford regarding battery charging rates and efficiency. | 27th Mar 1924 | Box 61 \ 1 scan0022 | |
| Letter discussing the use of hydrocarbon oil on electrolyte to prevent acid spray. | 10th Apr 1924 | Box 61 \ 1 scan0023 | |
| Letter from Peto & Radford advising on the covering of F.A.11. cells. | 10th Apr 1924 | Box 61 \ 1 scan0024 | |
| Graph recording the results of the first discharge test for P & R FA11 battery cells. | 18th Mar 1924 | Box 61 \ 1 scan0025 | |
| Letter to Peto & Radford regarding faulty FA.11 P & G battery cells with buckled plates. | 18th Mar 1926 | Box 61 \ 1 scan0026 | |
| Letter from a battery supplier acknowledging a report of buckled positive plates and arranging an inspection. | 19th Mar 1926 | Box 61 \ 1 scan0027 | |
| Forwarding a copy of a letter from Pritchett & Gold regarding P & R. FA.11 laboratory reservoir cells. | 22th Mar 1926 | Box 61 \ 1 scan0028 | |
| The inspection of an 8-cell battery, detailing issues from excessive charging and advising on future use. | 31th Mar 1926 | Box 61 \ 1 scan0029 | |
| The acquisition of six Exide MA.3 cells for the Experimental Department. | 8th Apr 1926 | Box 61 \ 1 scan0030 | |
| Advice note from Pritchett & Gold & E.P.S. Company Limited for the despatch of 'FA' tubes. | 17th Jul 1926 | Box 61 \ 1 scan0031 | |
| Letter requesting new positive elements for FA.11 battery cells and discussing platinum point issues on Phantom models. | 14th Sep 1926 | Box 61 \ 1 scan0032 | |
| Letter to supplier Peto & Radford regarding an incorrect delivery of positive sections for big cells. | 29th Sep 1926 | Box 61 \ 1 scan0033 | |
| The return of incorrectly supplied 'Peto & Radford Positive Elements' to the supplier. | 29th Sep 1926 | Box 61 \ 1 scan0034 | |
| Letter from Pritchett & Gold and E.P.S. Company, Limited regarding an error in sending battery sections. | 30th Sep 1926 | Box 61 \ 1 scan0035 | |
| Advice note for the dispatch of storage battery sections, a case, and boards. | 1st Oct 1926 | Box 61 \ 1 scan0036 | |
| Confirmation of receipt for a crate of FA.11 cells. | 6th Oct 1926 | Box 61 \ 1 scan0037 | |
| Return of a packing case belonging to Messrs. Peto & Radford. | 13th Oct 1926 | Box 61 \ 1 scan0038 | |
| Order of oil for P & R. FA.11 cells from Messrs. Peto & Radford. | 11th Nov 1926 | Box 61 \ 1 scan0039 | |
| Letter to Messrs. Peto & Radford regarding an error in a shipment of insulators and cell containers. | 7th Nov 1927 | Box 61 \ 1 scan0040 | |
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