| Description | Date | Identifier | |
| Table of lowest speeds in RPM for regular firing of various magnetos (Condor & Hawk size). | 14th Sep 1923 | Box 4 \ 5 05-page248 | |
| Progress report on the experimental testing of various magnetos. | 15th Jan 1924 | Box 4 \ 5 05-page249 | |
| Progress report table for experimental magneto testing, detailing models, quantities, weights, and test completion statuses. | 15th Jan 1924 | Box 4 \ 5 05-page250 | |
| Request for specification tests required on a list of magnetos for various engines and chassis. | 29th Nov 1923 | Box 4 \ 5 05-page251 | |
| Magneto test specifications and a request for magneto samples. | 18th Dec 1923 | Box 4 \ 5 05-page252 | |
| Design of fabric couplings for magneto and dynamo drives, referencing blueprint Lec.1821 and proposing size increases. | 31th Jan 1924 | Box 4 \ 5 05-page253 | |
| Letter to Messrs. North & Sons detailing a proposed practical test for magneto magnets, specifically for the R.O.1. Magnetos. | 14th Feb 1924 | Box 4 \ 5 05-page254 | |
| Continued discussion on testing methods for magnets, armatures, and treated magnet steel. | 1st Feb 1924 | Box 4 \ 5 05-page255 | |
| Oil retainer design, magneto ignition governing, and brake control issues for the 3rd E.A.C. Engine. | 1st Feb 1924 | Box 4 \ 5 05-page256 | |
| With suggestions for improving the design of Magneto Fabric Couplings. | 2nd Feb 1924 | Box 4 \ 5 05-page257 | |
| Secret memorandum discussing ignition issues and magneto options for the EAC engine. | 9th Feb 1924 | Box 4 \ 5 05-page258 | |
| New magneto and its design improvements to reduce noise in the Watford EC6. | 27th Feb 1924 | Box 4 \ 5 05-page259 | |
| Article from 'The Autocar' magazine detailing the stringent tests and construction of the new four-cylinder Peel-Conner Magneto. | 8th Feb 1924 | Box 4 \ 5 05-page260 | |
| Article from 'The Autocar' magazine discussing petrol prices in the U.S.A., opposition to increases, and the unlikelihood of an oil famine. | 8th Feb 1924 | Box 4 \ 5 05-page261 | |
| Regulations and an acceptance letter for the 1924 R.A.C. Small Car Trials. | 8th Feb 1924 | Box 4 \ 5 05-page262 | |
| Magazine page discussing ignition components, insulation testing, and motoring in the West Indies. | 8th Feb 1924 | Box 4 \ 5 05-page263 | |
| Design and reliability of a locked switchbox and ignition system, comparing various options. | 28th Mar 1924 | Box 4 \ 5 05-page264 | |
| Chemical leak utility tests for magneto and battery ignition systems. | 5th May 1924 | Box 4 \ 5 05-page265 | |
| Table of magneto distributor dimensions, make ratios, and ranges. | 8th May 1924 | Box 4 \ 5 05-page266 | |
| Recommendations for the assembly and timing procedure of Dynamo and Magneto Drives for model EAC.111. | 13th May 1924 | Box 4 \ 5 05-page267 | |
| Reduction in the maximum engine speed for the 40/50 HP model. | 27th May 1924 | Box 4 \ 5 05-page268 | |
| Meeting about magneto requirements and alternatives, specifically regarding the Scintilla magneto. | 27th May 1924 | Box 4 \ 5 05-page269 | |
| The specification of safety spark gaps in breakdown voltage versus millimetres for different magneto types. | 27th May 1924 | Box 4 \ 5 05-page270 | |
| Performance specification for a six-cylinder magneto with automatic advance for the R.H. 40/50 car. | 27th May 1924 | Box 4 \ 5 05-page271 | |
| Test procedures for a magneto, including endurance, short circuit, open circuit, and utility tests. | 27th May 1924 | Box 4 \ 5 05-page272 | |
| Performance and timing specifications for a magneto system. | 27th May 1924 | Box 4 \ 5 05-page273 | |
| Confirming the magneto armature speed specification for the 40/50 car. | 27th May 1924 | Box 4 \ 5 05-page274 | |
| Letter to suppliers discussing the specifications for a six-cylinder magneto with automatic advance for the 40/50 car. | 29th May 1924 | Box 4 \ 5 05-page275 | |
| Notes on six-cylinder magneto requirements for the 40/50 car, focusing on automatic advance mechanisms. | 29th May 1924 | Box 4 \ 5 05-page276 | |
| Magneto ignition systems, advance mechanisms, and sparking requirements for an engine. | 29th May 1924 | Box 4 \ 5 05-page277 | |
| Magneto and spark plug performance, analysing spark gap size and voltage requirements to prevent misfires. | 29th May 1924 | Box 4 \ 5 05-page278 | |
| Magneto design, comparing revolving armature with revolving magnet types like the Scintilla. | 29th May 1924 | Box 4 \ 5 05-page279 | |
| Continued page of a document detailing magneto specifications and performance requirements. | 29th May 1924 | Box 4 \ 5 05-page280 | |
| Preliminary remarks and notes on the specification for a six-cylinder magneto with automatic advance for the 40/50 car. | 30th May 1924 | Box 4 \ 5 05-page281 | |
| Magneto requirements for the EAC.2 engine and a tentative specification for a new six-cylinder magneto. | 30th May 1924 | Box 4 \ 5 05-page282 | |
| Continued memorandum regarding Scintilla magnetos, including booklets, blueprints, and a draft specification. | 30th May 1924 | Box 4 \ 5 05-page283 | |
| Table of sparking voltages for various gap sizes using a 3-point gap, and for specific magnetos. | 11th Jun 1924 | Box 4 \ 5 05-page284 | |
| Curve graph showing sparking voltage against gap for a 3-point gap with Mascot electrodes. | 14th Dec 1920 | Box 4 \ 5 05-page285 | |
| Progress report table for experimental magneto testing, listing various models and their test statuses. | 30th Jun 1924 | Box 4 \ 5 05-page286 | |
| Hoping the next 40/50 or R.A.C. car will have a governed magneto. | 30th Jun 1924 | Box 4 \ 5 05-page287 | |
| Ignition systems, detonations, and the testing of magnetos with automatic advance for the 40/50 model. | 10th Jul 1924 | Box 4 \ 5 05-page288 | |
| Comparing the characteristics of magneto and battery ignition systems with a corresponding graph. | 14th Jul 1924 | Box 4 \ 5 05-page289 | |
| Technical document detailing the advantages and electrical properties of an annular spark gap. | 16th Jul 1934 | Box 4 \ 5 05-page290 | |
| Calculation of excess potential and electric force between a central wire and an outer cylinder. | 16th Jul 1924 | Box 4 \ 5 05-page291 | |
| Mathematical analysis of electric force and potential difference in relation to wire diameter. | 16th Jul 1924 | Box 4 \ 5 05-page292 | |
| Technical analysis of annular spark gap design, discussing wire to hole diameter ratios and discharge characteristics. | 16th Jul 1924 | Box 4 \ 5 05-page293 | |
| Comparison of electric force in a concentric sphere gap versus a cylindrical gap, with relevant formulas. | 24th Jul 1924 | Box 4 \ 5 05-page294 | |
| Secret memorandum outlining the reasons for not using the Scintilla magneto on the RAC.2 model. | 24th Jul 1924 | Box 4 \ 5 05-page295 | |
| Test report comparing the sparking performance of Mea and Eisemann magnetos. | 20th Aug 1924 | Box 4 \ 5 05-page296 | |
| Graph plotting automatic magneto advance characteristics against revolutions per minute for present and proposed arrangements. | 16th May 1921 | Box 4 \ 5 05-page297 | |
| List of procedures for the comparison of experimental magnetos. | 2nd Sep 1924 | Box 4 \ 5 05-page298 | |
| Page detailing a series of electrical tests for a magneto, including short circuit, open circuit, and utility tests. | 2nd Sep 1924 | Box 4 \ 5 05-page299 | |
| Page of a magneto test procedure outlining various electrical load and spark gap conditions. | 2nd Sep 1924 | Box 4 \ 5 05-page300 | |
| Testing procedures for magneto sparking regularity and firing speeds at different advance positions. | 2nd Sep 1924 | Box 4 \ 5 05-page301 | |
| Test procedures for a primary point gap, magneto break, and observing machine operation. | 21th Aug 1924 | Box 4 \ 5 05-page302 | |
| Table of results of magneto performance tests. | 21th Aug 1924 | Box 4 \ 5 05-page303 | |
| Comparison table of various magneto specifications and performance data. | 21th Aug 1924 | Box 4 \ 5 05-page304 | |
| Specification table for various magneto models detailing their electrical resistance and performance data. | 22th Sep 1924 | Box 4 \ 5 05-page305 | |
| Comparing the performance of English magnetos versus German Bosch magnetos in post-war and pre-war vehicles. | 22th Sep 1924 | Box 4 \ 5 05-page306 | |
| Revised specification for the performance of a 6-cylinder magneto, including experimental work on annular spark gaps. | 20th Oct 1924 | Box 4 \ 5 05-page307 | |
| Experiments to standardize a 'leak' component for testing magneto performance under simulated sparking plug conditions. | 20th Oct 1924 | Box 4 \ 5 05-page308 | |
| Investigation into electrostatic principles of annular gaps and spark-over voltage using different electrode sets. | 20th Oct 1924 | Box 4 \ 5 05-page309 | |
| Technical table detailing measurements and observations for different annular gaps. | 8th Oct 1924 | Box 4 \ 5 05-page310 | |
| Magneto performance, including electrostatic principles, standardized test gaps, and comparative bench tests. | 20th Oct 1924 | Box 4 \ 5 05-page311 | |
| Instructions for a standardised gap and chemical leak test on various magnetos to complete performance specifications. | 24th Oct 1924 | Box 4 \ 5 05-page312 | |
| Instruction sheet detailing test results for various magnetos, including speed ranges and operating conditions. | 24th Oct 1924 | Box 4 \ 5 05-page313 | |
| Instruction setting the specification speed limits from 700 rpm to 2800 rpm for magneto speeds. | 27th Oct 1924 | Box 4 \ 5 05-page314 | |
| Letter to Lucas Elec Co. detailing alterations to the specification for a six-cylinder magneto. | 27th Oct 1924 | Box 4 \ 5 05-page315 | |
| The concluding page of a specification document, noting that the speed range may be subject to alteration. | 3rd Nov 1924 | Box 4 \ 5 05-page316 | |
| Experimental comparison report on three magnetos: Watford ZC6, R. Bosch ZR.6, and B.T.H. CE.6. | 3rd Nov 1924 | Box 4 \ 5 05-page317 | |
| Tests of primary point gaps, contact breaker timing, endurance, and utility for three magneto models. | 13th Nov 1924 | Box 4 \ 5 05-page318 | |
| Results of performance tests on various magneto ignition systems under different configurations. | 3rd Nov 1924 | Box 4 \ 5 05-page319 | |
| Comparison of performance characteristics for various magneto models. | 3rd Nov 1924 | Box 4 \ 5 05-page320 | |
| The high and low-speed sparking characteristics of various magneto models. | 3rd Nov 1924 | Box 4 \ 5 05-page321 | |
| Investigation into the low speed sparking characteristics and performance of standard E06 machines. | 6th Oct 1924 | Box 4 \ 5 05-page322 | |
| Table of low-speed sparking results for the Standard E06 Watford Magneto. | 6th Oct 1924 | Box 4 \ 5 05-page323 | |
| Performance comparison report of Watford, R. Bosch, and B.T.H. magnetos, focusing on electrical output and noise levels. | 19th Dec 1924 | Box 4 \ 5 05-page324 | |
| Forwarding a leaflet from Magdynamo Engineering Co. Ltd. concerning their ZU-4 magneto. | 19th Dec 1924 | Box 4 \ 5 05-page325 | |
| List of positive rotation magnetos in the laboratory with condition remarks. | 9th Jan 1925 | Box 4 \ 5 05-page326 | |
| And comparing various ignition control schemes for the 'V' Series engine. | 31th Jan 1925 | Box 4 \ 5 05-page327 | |
| Note discussing potential detonation issues with separate governors and wide-apart spark plugs. | 31th Jan 1925 | Box 4 \ 5 05-page328 | |
| Specification of performance for a 6-cylinder magneto without automatic advance for the 40/50 car. | 25th Feb 1925 | Box 4 \ 5 05-page329 | |
| Magneto utility and spark testing procedures under various conditions. | 25th Feb 1925 | Box 4 \ 5 05-page330 | |
| Specifications for magneto operation, including minimum sparking speed, timing, silence, and direction of rotation. | 25th Apr 1928 | Box 4 \ 5 05-page331 | |
| Literature from Marelli Magnetos about their use by Italian and French car manufacturers. | 25th Apr 1928 | Box 4 \ 5 05-page332 | |
| Assessment of Marelli magnetos, noting their robust construction, unique contact breaker, and use in other vehicles. | 28th Apr 1925 | Box 4 \ 5 05-page333 | |
| Table detailing magneto performance tests according to a new general specification, incorporating automatic advance. | 21th Aug 1924 | Box 4 \ 5 05-page334 | |
| The method for testing magneto volt-ampere capacity and calculating the figure of merit. | 21th Apr 1925 | Box 4 \ 5 05-page335 | |
| Table detailing the results of magneto tests, including volt-ampere capacity and figure of merit. | 21th Apr 1925 | Box 4 \ 5 05-page336 | |
| Comparison table of magneto tests, detailing volt-ampere capacity and figure of merit. | 21th Apr 1925 | Box 4 \ 5 05-page337 | |
| Comparison table of magneto tests showing volt-ampere capacity and figure of merit. | 14th Apr 1928 | Box 4 \ 5 05-page338 | |
| Test results table for chassis magnetos, comparing volt-ampere capacity and figure of merit. | 14th Apr 1928 | Box 4 \ 5 05-page339 | |
| Test report comparing the volt-ampere capacity and figure of merit for various aero magnetos. | 14th Apr 1928 | Box 4 \ 5 05-page340 | |
| Test procedure outlining the steps for demagnetising tests on a magneto. | 27th Apr 1925 | Box 4 \ 5 05-page341 | |
| The test procedure for determining the volt-ampere capacity and figure of merit of magnetos. | 21th Apr 1925 | Box 4 \ 5 05-page342 | |
| Table of test results for various magnetos, showing their volt-ampere capacity and figure of merit. | 21th Apr 1925 | Box 4 \ 5 05-page343 | |
| Comparison table of magneto tests showing volt-ampere capacity and figure of merit for various manufacturers. | 23th Nov 1925 | Box 4 \ 5 05-page344 | |
| Test results report for various magnetos against general specifications, without automatic advance. | 23th Nov 1925 | Box 4 \ 5 05-page345 | |
| Table of results of magneto performances. | 4th Jan 1926 | Box 4 \ 5 05-page346 | |
| Tabular report on performance and noise level tests for various speed ranges. | 2nd Sep 1924 | Box 4 \ 5 05-page347 | |
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