| Description | Date | Identifier | |
| The Goshawk II governor drive, detailing angular movements, ranges and spring settings. | 28th Mar 1922 | Box 51 \ 5 Scan227 | |
| Automatic advance ignition for the Goshawk 11 engine, discussing production and specifications. | 1st Apr 1922 | Box 51 \ 5 Scan228 | |
| Extract from a note discussing automatic advance for battery ignition and a related disagreement. | 13th Apr 1922 | Box 51 \ 5 Scan229 | |
| Engine advance curves and modifications to the Goshawk governor. | 13th Apr 1922 | Box 51 \ 5 Scan230 | |
| Technical memorandum discussing ignition advance curves and production alterations for the Goshawk II engine governor. | 20th Apr 1922 | Box 51 \ 5 Scan231 | |
| Ignition modification, governor start speed, and a request for figures from Mr. Hives. | 20th Apr 1922 | Box 51 \ 5 Scan232 | |
| List of reported failures and required standards for various components of the Goshawk II. | 25th Apr 1922 | Box 51 \ 5 Scan233 | |
| Extract concerning the Goshawk II engine's starter switch, ignition, and high tension rotor. | 28th Apr 1922 | Box 51 \ 5 Scan234 | |
| Blueprint with calculations and diagrams for the Goshawk II engine governor mechanism. | 28th Apr 1922 | Box 51 \ 5 Scan235 | |
| Instruction to supply Hoffmann Ball Bearings for the 'Goshawk I' Governor Drive experiment. | 20th Sep 1922 | Box 51 \ 5 Scan236 | |
| Graph showing characteristic curves for the Goshawk automatic ignition advance governor. | 12th Mar 1923 | Box 51 \ 5 Scan237 | |
| Production inspection, adjustment, and test procedure for the Goshawk ignition distributor and contact breaker. | 12th Mar 1923 | Box 51 \ 5 Scan238 | |
| Page detailing testing procedures for contact spring tension and distributor high tension rotor insulation. | 12th Mar 1923 | Box 51 \ 5 Scan239 | |
| Procedure for the mechanical testing of a governor, including advance-speed characteristics. | 12th Mar 1923 | Box 51 \ 5 Scan240 | |
| Instructions on altering the spring set for the weights if speed limits are not met. | 28th Mar 1923 | Box 51 \ 5 Scan241 | |
| The ignition timing range for a Goshawk engine on a 49-GB car. | 28th Mar 1923 | Box 51 \ 5 Scan242 | |
| Updated specification for the production test of the ignition governor. | 22th Jun 1923 | Box 51 \ 5 Scan243 | |
| Suggestion to increase the automatic ignition advance on the 20HP model to reduce the risk of detonation. | 14th Jul 1927 | Box 51 \ 5 Scan244 | |
| Graph of required ignition advance curves (maximum and minimum) versus engine speed for the 20 HP engine. | 27th Sep 1924 | Box 51 \ 5 Scan245 | |
| The ignition advance curves required for a 20 HP engine. | 3rd Feb 1922 | Box 51 \ 5 Scan246 | |
| Ignition control settings and timing comparison for a high compression 25 HP car engine. | 6th Feb 1930 | Box 51 \ 5 Scan247 | |
| Magneto ignition timing, range of advance, and detonation issues at different speeds. | 6th Feb 1930 | Box 51 \ 5 Scan248 | |
| Ignition timing alterations for the high compression 20-25 HP car. | 16th Apr 1930 | Box 51 \ 5 Scan249 | |
| Alteration to the ignition timing leverage on high compression 20/25 HP cars. | 3rd May 1930 | Box 51 \ 5 Scan250 | |
| Issues with the recommended ignition timing settings for the 20/25 HP high compression car. | 3rd May 1930 | Box 51 \ 5 Scan251 | |
| Ignition timing adjustments for high compression 20/25 HP cars. | 5th May 1930 | Box 51 \ 5 Scan252 | |
| Continued memorandum discussing the difficulty of having no automatic control on magneto ignition. | 5th May 1930 | Box 51 \ 5 Scan253 | |
| Ignition timing settings for the high compression 20/25 HP car. | 12th May 1930 | Box 51 \ 5 Scan254 | |
| Timing diagram for a 20/25 HP engine with a 5.25:1 compression ratio, showing battery and magneto ignition advance. | 12th May 1931 | Box 51 \ 5 Scan255 | |
| 10,000-mile test car to determine the optimal ignition timing on Ticknall Hill. | 26th Oct 1931 | Box 51 \ 5 Scan256 | |
| Graph of ignition governor advance curves for the GOS. C.5 engine. | 26th Oct 1931 | Box 51 \ 5 Scan257 | |
| Internal request to order 200 Indicator diagram cards from The Crosby Valve & Engineering Co. Ltd. | 1st Jul 1927 | Box 52 \ 1 Scan001 | |
| Letter from Crosby Valve & Engineering Co. regarding Crosby Indicators and enclosing pamphlet L.1205. | 4th Apr 1928 | Box 52 \ 1 Scan002 | |
| Page two of a letter from Crosby Valve & Engineering regarding stock availability. | 4th Apr 1928 | Box 52 \ 1 Scan003 | |
| Two-page pamphlet describing Amsler's Planimeters and Crosby Indicators, including models, features, purpose, and pricing. | 1st Sep 1926 | Box 52 \ 1 Scan004 | |
| Blueprint detailing a modification to a Crosby Indicator for use with hydraulics. | 7th Jan 1933 | Box 52 \ 1 Scan005 | |
| Blueprint showing modifications to a Crosby hydraulic indicator. | 8th May 1928 | Box 52 \ 1 Scan006 | |
| Urgent internal memo requesting a catalogue for a Crosby Indicator. | 4th Apr 1928 | Box 52 \ 1 Scan007 | |
| Letter from the London Midland and Scottish Railway Company regarding the loan of a locomotive indicator. | 13th Apr 1928 | Box 52 \ 1 Scan008 | |
| Urgent internal memo requesting the purchase of specially prepared indicator cards. | 19th May 1928 | Box 52 \ 1 Scan009 | |
| Modification of a Crosby steam engine indicator to measure hydraulic shock absorber pressures. | 18th Jun 1928 | Box 52 \ 1 Scan010 | |
| Summary of test results comparing pressure velocity dampers with standard dampers. | 18th Jun 1928 | Box 52 \ 1 Scan011 | |
| Vehicle suspension testing, concerning low-speed valves, shock absorbers, and axle movements. | 18th Jun 1928 | Box 52 \ 1 Scan012 | |
| Comparison table of rear hydraulic shock damper characteristics for viscosity loading and standard dampers. | 1st Jun 1928 | Box 52 \ 1 Scan013 | |
| Tests to determine the effect of temperature rise on the behaviour of hydraulic dampers. | 1st Jun 1928 | Box 52 \ 1 Scan014 | |
| The second series of tests on a hydraulic damper, detailing the behaviour of staggered orifices under temperature variation. | 1st Jun 1928 | Box 52 \ 1 Scan015 | |
| Damper performance tests, summarising results and proposing design improvements. | 1st Jun 1928 | Box 52 \ 1 Scan016 | |
| Blueprint showing two graphs of standard damper performance variation with temperature at high and low pressures. | 1st Jun 1928 | Box 52 \ 1 Scan017 | |
| Blueprint showing graphs and diagrams analyzing the variation in performance of a staggered orifice system caused by temperature changes. | 1st Jun 1928 | Box 52 \ 1 Scan018 | |
| Graphs showing the variation of reduced diameter restrictions with oil temperature. | 28th Aug 1928 | Box 52 \ 1 Scan019 | |
| Arranging to test two steam indicators from vehicle 66-YC. | 28th Aug 1928 | Box 52 \ 1 Scan020 | |
| Pair of steam indicators and a list of discussion points for an upcoming meeting. | 4th Sep 1928 | Box 52 \ 1 Scan021 | |
| Confirming the receipt of two steam engine indicators for a shock absorber rig. | 1st Sep 1928 | Box 52 \ 1 Scan022 | |
| Letter from the London Midland and Scottish Railway Company requesting the return of a loaned steam engine indicator. | 7th Mar 1929 | Box 52 \ 1 Scan023 | |
| Arranging the return of a loaned Crosby Steam Indicator to the London Midland & Scottish Railway Company. | 13th Mar 1929 | Box 52 \ 1 Scan024 | |
| Visit from William C. Werry, an inventor of a new type of petrol engine. | 21th Mar 1928 | Box 52 \ 1 Scan025 | |
| Newspaper extract from the 'Westminster Gazette' about a new engine claiming to be the mightiest in the world. | 1st Sep 1927 | Box 52 \ 1 Scan026 | |
| Letter to W.C. Werry regarding his petrol engine invention, requesting drawings or a model for assessment. | 22th Mar 1928 | Box 52 \ 1 Scan027 | |
| Confirming direct communication with Mr. William C. Werry. | 22th Mar 1928 | Box 52 \ 1 Scan028 | |
| Letter from engineer William C. Werry arranging a demonstration of his high-speed motor engine installed in a motorcycle. | 23th Mar 1928 | Box 52 \ 1 Scan029 | |
| Letter declining a demonstration of a motor-cycle engine but requesting performance data and mechanical construction details. | 26th Mar 1928 | Box 52 \ 1 Scan030 | |
| High cost of Bosch sparking plugs and recommending a sample be ordered before committing to a larger quantity. | 2nd Nov 1928 | Box 52 \ 1 Scan031 | |
| The arrangement to obtain Bosch sparking plugs for experimental testing. | 6th Nov 1928 | Box 52 \ 1 Scan032 | |
| Progress and necessary improvements for the battery ignition system design. | 8th Dec 1919 | Box 52 \ 1 Scan033 | |
| Westinghouse's electrical work, sales figures, and the various uses of Bakelite-Micarta in automotive and naval applications. | 21th Dec 1920 | Box 52 \ 1 Scan034 | |
| Comparing high-tension wiring cables from two different suppliers for the Goshawk engine. | 9th Dec 1922 | Box 52 \ 1 Scan035 | |
| Extract detailing a proposal for separating H.T. wiring for magneto and battery ignition systems to improve reliability. | 19th Jan 1923 | Box 52 \ 1 Scan036 | |
| Routing of the H.T. wire for the Goshawk II standby magneto ignition system and the design of a changeover switch. | 21th Jul 1923 | Box 52 \ 1 Scan037 | |
| The dispatch of design schemes for ignition wiring, torque reaction dampers, and a modified wheel case for the 40/50 chassis. | 13th Oct 1923 | Box 52 \ 1 Scan038 | |
| Secret memo discussing the manufacturing process for a bakelite moulding for ignition wiring. | 27th Nov 1924 | Box 52 \ 1 Scan039 | |
| Proposed straight moulded ignition wire tube, referencing drawing No. LeC.1986 and seeking approval from Mr. Royce. | 22th Jan 1925 | Box 52 \ 1 Scan040 | |
| Instructions for tests on static induction effects with high-tension wiring in an insulating tube. | 12th Feb 1925 | Box 52 \ 1 Scan041 | |
| The observed effect of earthing one set of ignition wires. | 27th Aug 1929 | Box 52 \ 1 Scan042 | |
| Instruction sheet and report on testing magneto and battery ignition spark gaps. | 29th Jun 1920 | Box 52 \ 1 Scan043 | |
| Instruction sheet detailing a test on spark gap distances and the effects of induced sparks. | 28th Sep 1920 | Box 52 \ 1 Scan044 | |
| Instructions for tests on static induction effects with a metal tube on ignition wires. | 19th Feb 1925 | Box 52 \ 1 Scan045 | |
| Test report comparing induced spark lengths from magneto wires versus battery wire terminals. | 20th Jun 1920 | Box 52 \ 1 Scan046 | |
| Instructions and test results for induced spark lengths with battery and magneto wires. | 29th Jun 1920 | Box 52 \ 1 Scan047 | |
| Instructions detailing an investigation into ignition spark characteristics with a condenser and an earthed tube. | 29th Sep 1920 | Box 52 \ 1 Scan048 | |
| Instructions detailing tests on H.T. spark intensity and recommending the use of earthed metal tubes. | 26th Feb 1925 | Box 52 \ 1 Scan049 | |
| Investigation into the static induction effect on high-tension wires due to the synchronism of battery and magneto ignition sparks. | 26th Feb 1925 | Box 52 \ 1 Scan050 | |
| Instruction sheet detailing observations on induced sparking across ignition system gaps under different conditions. | 29th Jun 1920 | Box 52 \ 1 Scan051 | |
| Instructions and observations from a test on battery ignition polarity and spark gaps. | 28th Jun 1920 | Box 52 \ 1 Scan052 | |
| Instructions regarding an undesirable induced effect in an engine's dual ignition system. | 20th May 1920 | Box 52 \ 1 Scan053 | |
| High voltage tests comparing Maconite H.T. and Glover's ignition cables. | 7th Jun 1926 | Box 52 \ 1 Scan054 | |
| Instruction to test new wire samples and report back on the findings, noting that the black enamelled version seems better. | 7th Jan 1927 | Box 52 \ 1 Scan055 | |
| From EFC forwarding an assistant's report on wires and confirming their suitability for a Mr. Brock. | 26th Jan 1927 | Box 52 \ 1 Scan056 | |
| Instruction regarding the examination of wire samples from British Insulated Wires for potential use in ignition coils. | 26th Jan 1927 | Box 52 \ 1 Scan057 | |
| Ignition misfiring issue caused by the proximity of high and low tension wires. | 8th Aug 1927 | Box 52 \ 1 Scan058 | |
| Request to renew H.T. and L.T. wires on vehicle 8-EX due to perished rubber and a mysterious misfire. | 14th Nov 1927 | Box 52 \ 1 Scan059 | |
| Request to compare a sample of High Tension Ignition Cable from a new supplier against an existing one. | 28th Nov 1927 | Box 52 \ 1 Scan060 | |
| Comparative tests and costs of H.T. ignition cables from suppliers Glover, Maconite, and Helsby. | 8th Dec 1927 | Box 52 \ 1 Scan061 | |
| Laboratory report on comparative tests between Maconite and Glover H.T. ignition wires. | 8th Dec 1927 | Box 52 \ 1 Scan062 | |
| Durability of standard H.T. ignition cables and considering a superior experimental alternative. | 8th Dec 1927 | Box 52 \ 1 Scan063 | |
| Letter from an electrical wire supplier regarding cracking issues with H.T. Ignition Wire. | 9th Dec 1927 | Box 52 \ 1 Scan064 | |
| Follow-up memo requesting remarks on the subject of H.T. Ignition Cable. | 5th Jan 1928 | Box 52 \ 1 Scan065 | |
| Failure of H.T. Ignition Cables due to heat and the need for a more durable replacement. | 7th Jan 1928 | Box 52 \ 1 Scan066 | |
| Comparing prices for 'Maconite' and 'Glover's' H.T. ignition cables. | 24th Jan 1928 | Box 52 \ 1 Scan067 | |
| Follow-up memo requesting a report on the testing of H.T. Ignition Cables. | 2nd Feb 1928 | Box 52 \ 1 Scan068 | |
| Letter of complaint to a supplier regarding the poor quality of a recently delivered High Tension Cable. | 1st May 1928 | Box 52 \ 1 Scan069 | |
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