| Description | Date | Identifier | |
| The fitting of a Lucas Type 38.T. horn to a Goshawk chassis and its potential impact on engine accessibility. | 20th Mar 1922 | Box 45 \ 3 Scan250 | |
| Requesting recommendations on which horn to adopt as standard for the Goshawk chassis. | 14th Aug 1922 | Box 45 \ 3 Scan251 | |
| The fitting of a Lucas horn to a Goshawk chassis and requesting a report on its suitability. | 20th Mar 1922 | Box 45 \ 3 Scan252 | |
| Suitability of the Cobra horn versus a bulb horn for the Goshawk limousine. | 22th Aug 1922 | Box 45 \ 3 Scan253 | |
| Recommending a change in spring material gauge for the push-button Klaxon switch on the 20 HP chassis to reduce stiffness. | 29th Oct 1923 | Box 45 \ 3 Scan254 | |
| Desirability of fitting a cutout and a low note horn for use in France. | 1st Jul 1924 | Box 45 \ 3 Scan255 | |
| Faulty bulb horns on 20-HP & 40/50 HP models due to water ingress and a proposed solution. | 28th Jan 1924 | Box 45 \ 3 Scan256 | |
| Use of exhaust cutouts, suggesting they be offered as an optional extra on the 40/50 and Goshawk models. | 2nd Feb 1924 | Box 45 \ 3 Scan257 | |
| Arranging to send a horn for a Goshawk vehicle. | 2nd Feb 1924 | Box 45 \ 3 Scan258 | |
| Request to send a 'Boa' Horn for a 20 HP car to Mr. Royce at his address in France. | 7th Feb 1924 | Box 45 \ 3 Scan259 | |
| Requesting a replacement horn bulb for Mr. Royce's Goshawk car. | 13th Oct 1924 | Box 45 \ 3 Scan260 | |
| Cross-reference note regarding further information for 20/25 Horns (general). | 31th Dec 1930 | Box 45 \ 3 Scan261 | |
| Experimental document detailing the coil for battery ignition for the 'Goshawk' II engine. | 1st Aug 1921 | Box 45 \ 4 Scan001 | |
| Test results of standard and U.S.A. Bosch ignition coils. | 25th Oct 1921 | Box 45 \ 4 Scan002 | |
| Extract discussing ignition coil winding and contact pressure for the Goshawk II engine. | 30th Dec 1921 | Box 45 \ 4 Scan003 | |
| Requesting the creation of three more B-type coils for experimental work on the 'Goshawk' battery ignition. | 9th Jan 1922 | Box 45 \ 4 Scan004 | |
| Experimental specification for 'B' type coils for battery ignition on the 'Goshawk' 11 engine. | 1st Jan 1922 | Box 45 \ 4 Scan005 | |
| Change in wire gauge for the secondary winding of 'Goshawk' 11 coils. | 27th Jan 1922 | Box 45 \ 4 Scan006 | |
| The production of the 'Goshawk' 11 Coil for battery ignition, detailing wire specifications and winding instructions. | 2nd Feb 1922 | Box 45 \ 4 Scan007 | |
| Experimental specifications for the 'Goshawk' 11 'B' Type ignition coil, detailing changes to winding wire for improved insulation. | 2nd Feb 1922 | Box 45 \ 4 Scan008 | |
| Experimental modifications to the 'Goshawk' 11 Coil for Battery Ignition 'B' Type, regarding changes to the insulation paper. | 3rd Mar 1922 | Box 45 \ 4 Scan009 | |
| The specifications of a special B coil with condenser paper insulation. | 9th Mar 1921 | Box 45 \ 4 Scan010 | |
| Test report for Goshawk Ignition Coils, detailing various electrical measurements. | 14th Mar 1922 | Box 45 \ 4 Scan011 | |
| Experimental bench tests and manufacturing instructions for Goshawk battery ignition coils. | 15th Mar 1922 | Box 45 \ 4 Scan012 | |
| To Mr. Clark regarding the submission of 8 'B type' coils for testing. | 30th Mar 1922 | Box 45 \ 4 Scan013 | |
| The failures of a High Tension Rotor and a Coil for the Goshawk II engine. | 25th Apr 1922 | Box 45 \ 4 Scan014 | |
| The dispatch of one coil for a Goshawk-II engine to Mr. Swift. | 10th Jul 1922 | Box 45 \ 4 Scan015 | |
| Letter to Mr. Swift confirming the dispatch of one coil for a Goshawk engine by post. | 10th Jul 1922 | Box 45 \ 4 Scan016 | |
| Urgent telegram reporting a part failure and requesting an immediate replacement. | 10th Jul 1922 | Box 45 \ 4 Scan017 | |
| EFC to EP requesting the return of a B ignition coil for experimental analysis. | 8th Mar 1922 | Box 45 \ 4 Scan018 | |
| Availability of an ignition coil for inspection and testing. | 11th Sep 1922 | Box 45 \ 4 Scan019 | |
| Instruction sheet detailing the testing of a faulty production coil. | 11th Sep 1922 | Box 45 \ 4 Scan020 | |
| Test results for coils with standard and production ballasts. | 11th Sep 1922 | Box 45 \ 4 Scan021 | |
| Test report on the inductance and resonance of X4079 B coils. | 12th Sep 1922 | Box 45 \ 4 Scan022 | |
| Instructions detailing the electrical properties of an Ignition Coil B2. | 13th Sep 1922 | Box 45 \ 4 Scan023 | |
| Comparison of two B coils, testing for spark length, high-speed sparking, and insulation. | 14th Sep 1922 | Box 45 \ 4 Scan024 | |
| Test results for the electrical properties of coils GB6 and GB11. | 15th Sep 1922 | Box 45 \ 4 Scan025 | |
| Test results of standard and U.S.A. Bosch ignition coils. | 15th Sep 1922 | Box 45 \ 4 Scan026 | |
| Requesting the return of a loaned B Ignition Coil needed as a standard of comparison. | 12th Sep 1922 | Box 45 \ 4 Scan027 | |
| Particulars of an Experimental B type coil. | 19th Sep 1922 | Box 45 \ 4 Scan028 | |
| Instruction sheet detailing the test results of a production coil, number 17. | 26th Sep 1922 | Box 45 \ 4 Scan029 | |
| Weak Goshawk production coil being improved by paraffin wax impregnation. | 29th Sep 1922 | Box 45 \ 4 Scan030 | |
| The trial of an ignition coil impregnated with paraffin wax on experimental Goshawk cars. | 2nd Oct 1922 | Box 45 \ 4 Scan031 | |
| Test results for a paraffin wax-impregnated Goshawk winding coil, comparing performance before and after treatment. | 3rd Oct 1922 | Box 45 \ 4 Scan032 | |
| Goshawk II battery ignition failure due to a faulty coil. | 5th Oct 1922 | Box 45 \ 4 Scan033 | |
| Modifications to the Goshawk 11 ignition coil to eliminate recent trouble. | 5th Oct 1922 | Box 45 \ 4 Scan034 | |
| Fitting of a paraffin wax impregnated coil to chassis 6 EX. | 11th Oct 1922 | Box 45 \ 4 Scan035 | |
| Testing of a new Goshawk ignition coil design and the performance of faulty production coils. | 13th Oct 1922 | Box 45 \ 4 Scan036 | |
| Instruction sheet detailing the testing of coils with increased insulation. | 12th Oct 1922 | Box 45 \ 4 Scan037 | |
| Instruction sheet detailing test results and analysis of various ignition coils, comparing SG and Goshawk types. | 12th Oct 1922 | Box 45 \ 4 Scan038 | |
| Instructions comparing the sparking performance and order of merit for different Goshawk coils. | 12th Oct 1922 | Box 45 \ 4 Scan039 | |
| Instructions and report on the testing of faulty production coils, Nos. 16 and 18. | 13th Oct 1922 | Box 45 \ 4 Scan040 | |
| Instructions regarding the testing of production coils and the return of specific units. | 12th Oct 1922 | Box 45 \ 4 Scan041 | |
| Telegram concerning Goshawk engine ignition coil experiments. | 27th Oct 1922 | Box 45 \ 4 Scan042 | |
| Requesting the acceptance of four 40/50 type spark coils fitted in a Goshawk case for use in Mr. Archer's Department. | 28th Oct 1922 | Box 45 \ 4 Scan043 | |
| Production test procedure for Goshawk ignition coils without the use of a jig. | 28th Oct 1922 | Box 45 \ 4 Scan044 | |
| Page of test procedures for an electrical component, specifying current, voltage, and spark gap settings. | 28th Oct 1928 | Box 45 \ 4 Scan045 | |
| Investigating elusive battery ignition misfires on production Goshawk chassis under warm engine conditions. | 28th Oct 1928 | Box 45 \ 4 Scan046 | |
| Performance issues and modifications made to Goshawk ignition coils, including paraffin waxing and adding insulation. | 28th Oct 1922 | Box 45 \ 4 Scan047 | |
| Ignition coil performance, discussing issues with spark retard and ballast resistance. | 28th Oct 1922 | Box 45 \ 4 Scan048 | |
| Continued report on ignition coil performance, dynamo output, and ballast resistance. | 28th Oct 1922 | Box 45 \ 4 Scan049 | |
| Ignition coil experiments, investigating ballast amounts and secondary turn configurations for the Goshawk engine. | 28th Oct 1922 | Box 45 \ 4 Scan050 | |
| Trial and comparison of various ignition coils, including Goshawk and 40/50 types, with different turns and ballast resistances. | 28th Oct 1922 | Box 45 \ 4 Scan051 | |
| Experiments with Goshawk engine ignition coils, discussing their performance, efficiency, and potential for misfiring. | 28th Oct 1928 | Box 45 \ 4 Scan052 | |
| Ignition coil improvements and testing for the Goshawk chassis, comparing different coil constructions. | 28th Oct 1928 | Box 45 \ 4 Scan053 | |
| Transfer of four F.7153 40/50 type spark coils in a Goshawk case for Mr. Archer's department. | 30th Oct 1922 | Box 45 \ 4 Scan054 | |
| Extract from Mr Archer's report regarding tests on coil and ballast configurations. | 30th Oct 1922 | Box 45 \ 4 Scan055 | |
| Ignition failure in a Goshawk 11 engine, attributing the cause to coil overheating. | 6th Nov 1922 | Box 45 \ 4 Scan056 | |
| Engine performance and a proposed remedy for an overheating coil by redesigning its dimensions. | 6th Nov 1922 | Box 45 \ 4 Scan057 | |
| Telegram confirmation regarding Goshawk ignition problems and suggested material solutions. | 9th Nov 1922 | Box 45 \ 4 Scan058 | |
| The unsatisfactory Bakelite case for the Goshawk 11 ignition coil, recommending a change of material. | 9th Nov 1922 | Box 45 \ 4 Scan059 | |
| Battery ignition faults on the Goshawk chassis traced to the electrical properties of the bakelite coil case material at high temperatures. | 19th Nov 1922 | Box 45 \ 4 Scan060 | |
| Analysis of experiments on coil cases, identifying dielectric hysteresis loss as the cause of weakening effects. | 9th Nov 1922 | Box 45 \ 4 Scan061 | |
| Ignition coil testing, focusing on the weakness of bakelite (Elo) cases and electrical shock phenomena. | 19th Nov 1922 | Box 45 \ 4 Scan062 | |
| Experiments on reducing dielectric loss in coils by improving insulation materials and design. | 9th Nov 1922 | Box 45 \ 4 Scan063 | |
| Analysis of an electrical effect observed when touching ignition coil cases made of different materials like bakelite and mouldensite. | 9th Nov 1922 | Box 45 \ 4 Scan064 | |
| Analysis of DC leakage and insulation performance in a coil, particularly the effects of temperature on bakelite. | 9th Nov 1922 | Box 45 \ 4 Scan065 | |
| Coil failure analysis, discussing insulating materials to prevent issues from electrostatic potential. | 9th Nov 1932 | Box 45 \ 4 Scan066 | |
| Ignition coil experiments, comparing different turn counts and insulation materials like bakelite and asbestos. | 19th Nov 1922 | Box 45 \ 4 Scan067 | |
| Notes on further experiments testing various ignition coil materials and constructions. | 9th Nov 1922 | Box 45 \ 4 Scan068 | |
| The failure of a coil and planned tests for alternative arrangements in stabalite and bakelite cases. | 9th Nov 1922 | Box 45 \ 4 Scan069 | |
| Telegram about issues with a Goshawk battery ignition system, specifically the bakelite coil box. | 9th Nov 1922 | Box 45 \ 4 Scan070 | |
| Experiments with different filler materials for coil cases, including wood, asbestos, and bakelite. | 9th Nov 1922 | Box 45 \ 4 Scan071 | |
| The insulating properties of bakelite in a Goshawk coil and proposals for testing. | 10th Nov 1922 | Box 45 \ 4 Scan072 | |
| Electrostatic and dielectric losses in the Goshawk ignition coil and the choice of casing materials. | 11th Nov 1922 | Box 45 \ 4 Scan073 | |
| Suitable insulation materials for an electrical coil, comparing options like stabalite and bakelite. | 11th Nov 1922 | Box 45 \ 4 Scan074 | |
| Analysis of potential ignition failures, suggesting changes to sparking plugs and coil insulation. | 13th Nov 1922 | Box 45 \ 4 Scan075 | |
| Goshawk and other battery ignitions, detailing suggestions to avoid circuit losses. | 13th Nov 1922 | Box 45 \ 4 Scan076 | |
| Testing materials for condensers, ignition failures, and potential modifications to reduce energy loss. | 13th Nov 1922 | Box 45 \ 4 Scan077 | |
| Continued letter discussing experimental coils, requesting Stabalite coils for the Goshawk engine, and defining test parameters. | 13th Nov 1922 | Box 45 \ 4 Scan078 | |
| Bench tests on Goshawk ignition coil cases and outlining further experiments for insulation. | 14th Nov 1922 | Box 45 \ 4 Scan079 | |
| Tests conducted on Goshawk ignition coil cases to investigate electrostatic and leakage effects. | 13th Nov 1922 | Box 45 \ 4 Scan080 | |
| Continuation of a report on electrical tests of leakage resistance and spark length in condensers and coils with various casings. | 15th Nov 1922 | Box 45 \ 4 Scan081 | |
| Improvements to the Goshawk 11 battery ignition coil to reduce energy leakage. | 15th Nov 1922 | Box 45 \ 4 Scan082 | |
| Improvements to engine wiring, coils, and resistance to reduce self-induction. | 16th Nov 1922 | Box 45 \ 4 Scan083 | |
| Issues with the Goshawk coil, its sparking requirements and the weakening effect of L.T. wires. | 16th Nov 1922 | Box 45 \ 4 Scan084 | |
| Telegram requesting a test on the Goshawk coil regarding core hedgehogging and dimensional advantages. | 16th Nov 1922 | Box 45 \ 4 Scan085 | |
| Telegram from Royce regarding a design modification for paraffin wax filling. | 9th Jul 1918 | Box 45 \ 4 Scan086 | |
| Dispatch of a 40/50 coil and a high tension terminal for Goshawk battery ignition. | 16th Nov 1922 | Box 45 \ 4 Scan087 | |
| Request to obtain untreated silk ribbon for experimental work on Goshawk ignition coils. | 17th Nov 1922 | Box 45 \ 4 Scan088 | |
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