| Description | Date | Identifier | |
| Letter discussing the inter-connection of magneto and battery ignition for airship engines. | 16th Oct 1917 | Box 37 \ 1 scan 012 | |
| Implications of replacing the hand magneto with a battery ignition system for aero engines. | 7th Oct 1917 | Box 37 \ 1 scan 013 | |
| Magneto and battery ignition systems for engine starting and performance. | 26th Apr 1917 | Box 37 \ 1 scan 014 | |
| The interconnection of magneto and battery controls for airship engines. | 18th Oct 1917 | Box 37 \ 1 scan 015 | |
| Cover sheet regarding battery ignition, referencing other documents. | 18th Oct 1917 | Box 37 \ 1 scan 016 | |
| Adjustments to the Remy battery ignition's automatic advance range to prevent misfiring on an airship engine. | 27th Oct 1917 | Box 37 \ 1 scan 017 | |
| The effects of syringing water onto an engine's distributor and coil during operation. | 30th Oct 1917 | Box 37 \ 1 scan 018 | |
| From EH detailing Mr. Royce's thoughts on the manufacture of epicyclic gears and battery ignition development. | 30th Oct 1917 | Box 37 \ 1 scan 019 | |
| Confirming an instruction to build an experimental ignition coil and outlining further investigation into battery ignition for aero engines. | 26th Apr 1917 | Box 37 \ 1 scan 020 | |
| Request for the return of a contact breaker from a Delco ignition system for comparison purposes. | 8th Nov 1917 | Box 37 \ 1 scan 021 | |
| Cover memo for a tabular comparison of Remy and Delco ignition systems, with notes on future experiments for a proprietary design. | 9th Nov 1917 | Box 37 \ 1 scan 022 | |
| Impracticality of using battery ignition for engines 2100-2600 and recommending sticking with magnetos. | 29th Nov 1917 | Box 37 \ 1 scan 023 | |
| 100 Hour Test for the 'Eagle' engine, specifically regarding the fitting of battery ignition and a new articulated connecting rod pin. | 15th Jan 1918 | Box 37 \ 1 scan 024 | |
| Surprisingly high efficiency of a Lucas starter motor and arranging a meeting to discuss efficient battery ignition. | 15th Apr 1918 | Box 37 \ 1 scan 025 | |
| Extract describing the battery ignition system for Liberty engines. | 15th Apr 1918 | Box 37 \ 1 scan 026 | |
| Development of a single coil battery ignition system for the 'Condor' engine. | 24th Apr 1918 | Box 37 \ 1 scan 027 | |
| Ignition system design and firing timing, comparing the 'Liberty' engine to the 'Condor' engine. | 24th Apr 1918 | Box 37 \ 1 scan 028 | |
| 'Liberty' battery ignition system and potential improvements for a coil design. | 4th May 1918 | Box 37 \ 1 scan 029 | |
| Discussion comparing battery and magneto ignition systems and their performance in engines like the 'Falcon' and 'Condor'. | 4th May 1918 | Box 37 \ 1 scan 030 | |
| Ignition contact breaker proportions and safety settings to prevent engine reversal. | 4th May 1918 | Box 37 \ 1 scan 031 | |
| Ignition plug failures due to sooty deposits and the potential advantages of a jump spark distributor. | 14th May 1918 | Box 37 \ 1 scan 032 | |
| The design and performance of a battery ignition distributor, comparing it to Delco schemes. | 30th May 1918 | Box 37 \ 1 scan 033 | |
| Ignition systems, back-firing issues, and proposed improvements in collaboration with the Air Board. | 30th May 1918 | Box 37 \ 1 scan 034 | |
| Issues with battery ignition, including running backwards and wear on platinum points. | 12th Jun 1918 | Box 37 \ 1 scan 035 | |
| From R. to EFC discussing how a Falcon engine could run backwards with specific ignition arrangements. | 15th Feb 1918 | Box 37 \ 1 scan 036 | |
| Examination of the conditions under which an aero engine can run backwards on battery ignition. | 1st Jul 1918 | Box 37 \ 1 scan 037 | |
| Analysis of ignition timing, the contact breaker, and the potential for an engine to run backwards. | 22th Jul 1918 | Box 37 \ 1 scan 038 | |
| Page discussing engine ignition behaviour, specifically kick-back, backward running, and spark timing. | 22th Jul 1918 | Box 37 \ 1 scan 039 | |
| Continued discussion on engine timing, spark advance, and preventing backward running in an engine. | 22th Jul 1918 | Box 37 \ 1 scan 040 | |
| Preventing backward engine running by modifying the distributor and contact breaker. | 22th Jul 1918 | Box 37 \ 1 scan 041 | |
| Meeting with the Delco Company regarding battery ignition distributors and a manufacturing proposal. | 6th Dec 1918 | Box 37 \ 1 scan 042 | |
| Discussion with a supplier about manufacturing ignition apparatus, including the reliability of tungsten versus platinum terminals. | 26th Apr 1917 | Box 37 \ 1 scan 043 | |
| Technical discussion on tungsten oxides in relation to current density and criticisms of ignition break mechanisms. | 26th Apr 1917 | Box 37 \ 1 scan 044 | |
| The design flaws of a carbon brush mechanism and a disagreement over the need for reinforcement material. | 17th Apr 1918 | Box 37 \ 1 scan 045 | |
| Visit to the Delco factory regarding experimental battery ignition for the Eagle engine. | 17th Apr 1918 | Box 37 \ 1 scan 046 | |
| Comparison between Delco and Remy ignition distributors, with a discussion on carbon contacts versus jump spark systems. | 17th Apr 1918 | Box 37 \ 1 scan 047 | |
| Analysis of the Liberty distributor, detailing the materials, dimensions, and firing intervals of its contacts. | 17th Apr 1918 | Box 37 \ 1 scan 048 | |
| Technical discussion comparing Bakelite and hard rubber distributor materials and issues with charring. | 17th Apr 1918 | Box 37 \ 1 scan 049 | |
| Notes on the design and performance of the Remy ignition contact breaker, including materials and high-speed limitations. | 17th Apr 1918 | Box 37 \ 1 scan 050 | |
| The design of a contact breaker's dual rocker system, its wear characteristics, and the function of an auxiliary rocker to prevent back-firing. | 17th Apr 1918 | Box 37 \ 1 scan 051 | |
| Features of Delco contact breakers, generators, brushes, and voltage regulators, comparing them with other systems for aero and automobile engines. | 17th Apr 1918 | Box 37 \ 1 scan 052 | |
| Delco's dynamos and starting motors, including design choices and issues with early free-wheel models. | 17th Apr 1918 | Box 37 \ 1 scan 053 | |
| Continued description of a hardened gear and pressing a ground band into a soft wheel for a free wheel mechanism. | 17th Apr 1918 | Box 37 \ 1 scan 054 | |
| Requesting the production of four small ignition condensers for experiments, with a table of specifications. | 12th Dec 1918 | Box 37 \ 1 scan 055 | |
| Letter from the Remy Electric Company arranging a meeting and discussing contacts. | 1st Jan 1919 | Box 37 \ 1 scan 056 | |
| Modifying instructions for condensers used in battery ignition, detailing new specifications and capacities. | 3rd Jan 1919 | Box 37 \ 1 scan 057 | |
| Meeting with representatives from Delco and Remy regarding 'Liberty' ignition distributors. | 14th Jan 1919 | Box 37 \ 1 scan 058 | |
| Proposal from the Delco Company to manufacture ignition apparatus, listing various American cars and aero engines as examples. | 14th Jan 1919 | Box 37 \ 1 scan 059 | |
| Report listing various engine types and discussing the sourcing and analysis of ignition points. | 14th Jan 1919 | Box 37 \ 1 scan 060 | |
| Possibility of custom-making dynamos and a request for an interview with Mr. Royce. | 14th Jan 1919 | Box 37 \ 1 scan 061 | |
| Comparison of performance between trembler and non-trembler ignition systems on an experimental car. | 26th Sep 1919 | Box 37 \ 1 scan 062 | |
| Typed memorandum regarding the deterioration of an ignition system. | 26th Sep 1919 | Box 37 \ 1 scan 063 | |
| Sourcing, analysis, and workability of metallic tungsten for high and low tension contacts. | 20th Oct 1919 | Box 37 \ 1 scan 064 | |
| Alternative materials like Nickel and Tantalum for chassis rotors and a plan for further testing. | 20th Oct 1919 | Box 37 \ 1 scan 065 | |
| Chassis battery ignition experiments, specifically investigating spark length variations. | 20th Jan 1920 | Box 37 \ 1 scan 066 | |
| Calculated current figures for a coil at 500 R.P.M. | 20th Jan 1920 | Box 37 \ 1 scan 067 | |
| The loss of spark length in a chassis battery ignition system due to a second variable gap. | 5th Jan 1920 | Box 37 \ 1 scan 068 | |
| Article from 'The Motor' magazine describing a new ignition system using a condenser charged by dry cells. | 14th Jan 1920 | Box 37 \ 1 scan 069 | |
| Article about a new ignition system and spherical valve, and a guide to UK car licensing fees and procedures. | 14th Jan 1920 | Box 37 \ 1 scan 070 | |
| The Terry Ignition System, a battery and condenser system producing efficient sparking with low current consumption. | 14th Jan 1920 | Box 37 \ 1 scan 071 | |
| Explanation of the 'K' formula for measuring engine capacity and performance, using a bicycle as an initial example. | 4th Mar 1920 | Box 37 \ 1 scan 072 | |
| Request for two blueprints of tracings of curves in connection with battery ignition. | 4th Mar 1920 | Box 37 \ 1 scan 073 | |
| Tree diagram of battery ignition systems and their corresponding coil numbers. | 29th Jun 1920 | Box 37 \ 1 scan 074 | |
| Analysis of the automatic and hand control ignition advance on a Packard 12-cylinder engine, with test results. | 25th Jun 1920 | Box 37 \ 1 scan 075 | |
| Ignition timing settings at various RPMs and analysis from bench tests on a Packard car. | 25th Jun 1920 | Box 37 \ 1 scan 076 | |
| Page discussing the need to retard ignition by hand control to prevent engine detonation due to carbon build-up. | 1st Jun 1920 | Box 37 \ 1 scan 077 | |
| Fitting self-starters to earlier cars, discussing the risks of backfires and pre-ignition with different ignition systems. | 1st Aug 1920 | Box 37 \ 1 scan 078 | |
| Priming cars to avoid the risk of backfire and the recommendation to fit a self-starter. | 20th Aug 1920 | Box 37 \ 1 scan 079 | |
| Reprint from 'The Autocar' magazine describing the Conner Battery Ignition System. | 25th Sep 1920 | Box 37 \ 1 scan 080 | |
| Detailed description of the features, construction, and operation of a special ignition coil. | 25th Sep 1920 | Box 37 \ 1 scan 081 | |
| Reprint from 'The Autocar' magazine describing the Conner Battery Ignition System. | 25th Sep 1920 | Box 37 \ 1 scan 082 | |
| Detailed description of an ignition coil, its special features, construction, and operation. | 27th Nov 1920 | Box 37 \ 1 scan 083 | |
| Utility test of a spark-coil or magneto. | 27th Nov 1920 | Box 37 \ 1 scan 084 | |
| 'Utility Test' experiment involving electrical resistance. | 24th Jan 1919 | Box 37 \ 1 scan 085 | |
| Test results for various electrical coil configurations. | 24th Jan 1919 | Box 37 \ 1 scan 086 | |
| Utility test report for a Watford E6 magneto, reference X3199. | 10th Dec 1920 | Box 37 \ 1 scan 087 | |
| Utility test results for magnetos, detailing maximum gap measurements under various coil and primary circuit conditions. | 24th Jan 1919 | Box 37 \ 1 scan 088 | |
| Instructions for a utility test of a spark-coil, noting distributor modifications and test conditions. | 15th Dec 1920 | Box 37 \ 1 scan 089 | |
| Winding test of a spark-coil, comparing its performance against a Watford E6 magneto. | 30th Dec 1920 | Box 37 \ 1 scan 090 | |
| The effect of an auxiliary external gap in enhancing sparking at the main gap under adverse conditions. | 1st Jan 1921 | Box 37 \ 1 scan 091 | |
| Describing the 'Utility' test procedure for spark coils and magnetos. | 7th Jan 1921 | Box 37 \ 1 scan 092 | |
| Comparison of magneto and battery ignition systems, discussing trial results and leakage path effects. | 7th Jan 1921 | Box 37 \ 1 scan 093 | |
| Comparative sparking test between a Watford E.6 Magneto and a standard battery ignition system on a utility test. | 21th Dec 1920 | Box 37 \ 1 scan 094 | |
| Inquiry into why tungsten points are not durable in a 12-volt ignition system compared to a 6-volt Delco system. | 26th Jan 1921 | Box 37 \ 1 scan 095 | |
| Issues with U.S.A. electrical ignition equipment and comparing it to Bosch and in-house designs. | 16th Feb 1921 | Box 37 \ 1 scan 096 | |
| List of questions for Mr. Royce concerning battery ignition systems. | 3rd Mar 1921 | Box 37 \ 1 scan 097 | |
| Forwarding notes, corrected and added to by Mr. Royce, concerning Mr. Clark's visit to West Wittering. | 1st Apr 1921 | Box 37 \ 1 scan 098 | |
| List of points for attention regarding vehicle electrical systems following a visit by Mr. Clark. | 28th Feb 1921 | Box 37 \ 1 scan 099 | |
| List of specifications and actions for the development of dynamos and motors for large and small cars. | 1st Mar 1921 | Box 37 \ 1 scan 100 | |
| Improvements to a Watford machine and comparing various magneto suppliers. | 3rd Mar 1921 | Box 37 \ 1 scan 101 | |
| Pre-ignition issues caused by mutual induction in double battery ignition systems. | 12th Apr 1921 | Box 37 \ 1 scan 102 | |
| Pre-ignition problems caused by mutual induction effects from using double ignition systems. | 14th Apr 1921 | Box 37 \ 1 scan 103 | |
| Specifications and effects of braided high tension cable for aero engines used with wireless systems. | 11th May 1921 | Box 37 \ 1 scan 104 | |
| The second and final page of a memo returning correspondence on a matter concerning cylinders. | 11th May 1921 | Box 37 \ 1 scan 105 | |
| Letter discussing cost-saving design changes for a distributor and contact breaker. | 25th May 1921 | Box 37 \ 1 scan 106 | |
| Technical description of the Rotor, Cam, Condenser, and Advance Mechanism of an ignition system. | 25th May 1921 | Box 37 \ 1 scan 107 | |
| Report comparing design aspects of distributor mechanisms, including drive, bearings, and ventilation. | 25th May 1921 | Box 37 \ 1 scan 108 | |
| The design, materials, and insulation of a rocker component. | 25th May 1921 | Box 37 \ 1 scan 109 | |
| Hand-drawn sketch detailing the cross-section of a typical American battery ignition distributor and contact breaker. | 1st Jun 1921 | Box 37 \ 1 scan 110 | |
| From Mr. Olley discussing reports on ignition systems, comparing Delco, Bosch, and other American equipment. | 1st Jun 1921 | Box 37 \ 1 scan 111 | |
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