| Description | Date | Identifier | |
| Explaining the operation of the Goshawk II double throttle controls, referencing drawing No. Lec.1454. | 23th Mar 1921 | West Wittering \ G \ September1921 Scan28 | |
| Telegram inquiring about results for a cowling over the radiator on a 40/50 chassis. | 2nd Aug 1920 | West Wittering \ G \ September1921 Scan29 | |
| The revision of drawing No. LeC.M55 for the 'Goshawk II' carburettor. | 26th Sep 1921 | West Wittering \ G \ September1921 Scan30 | |
| Directive regarding the standardisation of iridio-platinum contact points and condenser capacity to reduce sparking. | 9th Sep 1921 | West Wittering \ G \ September1921 Scan31 | |
| The 'Goshawk II' switchbox drawing. | 29th Sep 1921 | West Wittering \ G \ September1921 Scan32 | |
| Results of comparative tests on Bakelite and 'ELO' mouldings. | 9th Sep 1921 | West Wittering \ G \ September1921 Scan33 | |
| Issues with the petrol tank, spring drive, and radiator on the Goshawk 11 model. | 9th Sep 1931 | West Wittering \ G \ September1921 Scan34 | |
| On the experimental testing and analysis of a U.S.A. Bosch battery ignition system's coil and condenser. | 15th Sep 1931 | West Wittering \ G \ September1921 Scan35 | |
| Technical memo comparing condenser capacities and various battery ignition systems, including Goshawk II and Bosch. | 5th Sep 1921 | West Wittering \ G \ September1921 Scan36 | |
| Experiences with Peto & Radford batteries and procuring a new battery for the Goshawk. | 1st Sep 1921 | West Wittering \ G \ September1921 Scan37 | |
| Pre-ignition issues caused by over-heated Champion ignition plugs, their failures, and potential design flaws. | 9th Sep 1921 | West Wittering \ G \ September1921 Scan38 | |
| Spark plug selection, balancing heat characteristics, and engine distribution improvements. | 1st Sep 1921 | West Wittering \ G \ September1921 Scan39 | |
| The leakage of charge test for the latest standard Chloride 6RXE5 12-volt battery after standing for six months. | 16th Sep 1921 | West Wittering \ G \ September1921 Scan40 | |
| Battery discharge capacity test to diagnose the cause of capacity loss. | 16th Sep 1921 | West Wittering \ G \ September1921 Scan41 | |
| Performance of a standard starter motor with a specific field coil arrangement. | 8th Sep 1921 | West Wittering \ G \ September1921 Scan42 | |
| Analysis of engine starting performance, comparing two series two parallel winding schemes and the impact of battery and cable resistance. | 1st Sep 1921 | West Wittering \ G \ September1921 Scan43 | |
| Comparison of battery performance under high-rate discharge, listing various tested models. | 8th Sep 1921 | West Wittering \ G \ September1921 Scan44 | |
| Broken valve spring washer and engine gear noise on a Goshawk 11 engine, suggesting modifications based on the 40/50 engine design. | 13th Sep 1921 | West Wittering \ G \ September1921 Scan45 | |
| Investigation into clutch jagger and top speed gear issues by testing a second Goshawk engine and gearbox unit. | 9th Sep 1921 | West Wittering \ G \ September1921 Scan46 | |
| Suitability and modification of dynamos and motors from various manufacturers for the Goshawk II electrical system. | 13th Sep 1921 | West Wittering \ G \ September1921 Scan47 | |
| The performance and testing of C.A.V. dynamos and motors, including issues with commutators. | 13th Sep 1921 | West Wittering \ G \ September1921 Scan48 | |
| Testing a high-current motor for the 40/50 chassis and necessary modifications. | 13th Sep 1921 | West Wittering \ G \ September1921 Scan49 | |
| Notes on batteries, starter cables, and starter motors. | 13th Sep 1921 | West Wittering \ G \ September1921 Scan50 | |
| Defining a limit for the virtual internal resistance of a battery for operating the starter motor. | 13th Sep 1921 | West Wittering \ G \ September1921 Scan51 | |
| Continued page detailing battery discharge testing procedures and specifications. | 13th Sep 1921 | West Wittering \ G \ September1921 Scan52 | |
| Continued report discussing battery and starter motor characteristics, referencing previous notes and S.A.E. standards. | 13th Sep 1921 | West Wittering \ G \ September1921 Scan53 | |
| Starter motor performance, comparing its battery system to American 12-volt systems and evaluating alternative batteries. | 13th Sep 1921 | West Wittering \ G \ September1921 Scan54 | |
| Results of starter motor brake tests and the merits of plotting data on a torque base versus an ampere base. | 13th Sep 1921 | West Wittering \ G \ September1921 Scan55 | |
| Tests and pricing of iridio-platinum contact points with a reduced platinum content. | 14th Sep 1921 | West Wittering \ G \ September1921 Scan56 | |
| The testing of irido-platinum contact points, detailing wear, misfiring, and rusting issues. | 9th Sep 1921 | West Wittering \ G \ September1921 Scan57 | |
| Sparking, rusting, and testing of iridio-platinum distributor points. | 11th Aug 1920 | West Wittering \ G \ September1921 Scan58 | |
| Cover note for an attached report on the comparative tests of Bakelite and 'Elo' mouldings. | 15th Sep 1921 | West Wittering \ G \ September1921 Scan59 | |
| Comparative tests of Bakelite and Elo mouldings, detailing fracture, absorption, and heat resistance. | 7th Jul 1921 | West Wittering \ G \ September1921 Scan60 | |
| Continued report on materials testing, comparing the properties of Bakelite and Elo in sulphuric acid. | 11th Aug 1920 | West Wittering \ G \ September1921 Scan61 | |
| Recommending the reconsideration of the Goshawk 11 petrol level indicator due to unreliability from rusting. | 15th Sep 1921 | West Wittering \ G \ September1921 Scan62 | |
| Request for the return of a Marmon switch, a Bosch switch, and a Speedometer Drive due to high costs and immediate need. | 15th Sep 1921 | West Wittering \ G \ September1921 Scan63 | |
| Testing and adoption of Bakelite-Micarta bushes for magnetos in place of fibre bushes. | 16th Sep 1921 | West Wittering \ G \ September1921 Scan64 | |
| Recommendation to immediately obtain and fit Bakelite-micarta bushes to magnetos on all cars in hand. | 6th Sep 1921 | West Wittering \ G \ September1921 Scan65 | |
| Modification scheme for existing axles to overcome failing single thrust bearings. | 17th Sep 1921 | West Wittering \ G \ September1921 Scan66 | |
| The modification and testing of journal and thrust bearings for axles. | 17th Sep 1921 | West Wittering \ G \ September1921 Scan67 | |
| The importance of maintaining an efficient oil film and the problems of using thick oil in winter. | 17th Sep 1921 | West Wittering \ G \ September1921 Scan68 | |
| Diagrams and functionality of the 'Goshawk II' electrical system, focusing on the switchbox and fuse arrangement. | 19th Sep 1921 | West Wittering \ G \ September1921 Scan69 | |
| Continued discussion on dynamo fuses, voltage rise, and protection of the electrical system. | 19th Sep 1921 | West Wittering \ G \ September1921 Scan70 | |
| The merits of using a series-operated buzzer and main fuse for electrical protection. | 19th Sep 1921 | West Wittering \ G \ September1921 Scan71 | |
| Cover memo for an assistant's report on comparative tests of insulating varnishes. | 20th Sep 1921 | West Wittering \ G \ September1921 Scan72 | |
| Comparative tests of standard insulating varnishes with Asiatic varnish. | 16th Sep 1921 | West Wittering \ G \ September1921 Scan73 | |
| The properties of asiatic varnish, including its inflammability, characteristics, and corrosive effects. | 28th Feb 1921 | West Wittering \ G \ September1921 Scan74 | |
| Reporting on the superior performance of American-supplied front springs in testing. | 20th Sep 1921 | West Wittering \ G \ September1921 Scan75 | |
| The performance issues of an experimental exhaust-heated throttle, particularly regarding poor fuel distribution in cold conditions. | 1st Sep 1921 | West Wittering \ G \ September1921 Scan76 | |
| Continued memorandum detailing throttle testing issues and a delay in sending model pieces to Springfield. | 20th Sep 1921 | West Wittering \ G \ September1921 Scan77 | |
| The excessively strong springs and a noisy gearbox bearing on the Goshawk 11. | 20th Sep 1921 | West Wittering \ G \ September1921 Scan78 | |
| The bench testing of a Rotax AT.4 dynamo sample for the Goshawk II engine, detailing its mechanical and electrical performance. | 19th Feb 1931 | West Wittering \ G \ September1921 Scan79 | |
| Performance test results and physical specifications of a machine compared to its design specification. | 21th Sep 1921 | West Wittering \ G \ September1921 Scan80 | |
| Performance test results for a dynamo, concluding its heating performance is reasonable and it is available for the Goshawk II chassis. | 21th Sep 1921 | West Wittering \ G \ September1921 Scan81 | |
| Graph of ampere output versus speed curves for a Rotax A.T.4 Dynamo for the Goshawk engine. | 21th Sep 1921 | West Wittering \ G \ September1921 Scan82 | |
| The back of a document with a company stamp and handwritten reference. | 21th Sep 1921 | West Wittering \ G \ September1921 Scan83 | |
| Sourcing and various types of Bakelite products and similar materials. | 21th Sep 1921 | West Wittering \ G \ September1921 Scan84 | |
| Comparison of insulating materials such as Bakelite, Beldalite, and Hightensite from various suppliers. | 21th Sep 1921 | West Wittering \ G \ September1921 Scan85 | |
| Deflection test results for a Goshawk 11 crankshaft. | 22th Sep 1921 | West Wittering \ G \ September1921 Scan86 | |
| Comparing the capacity and construction of various condensers for battery ignition systems. | 27th Sep 1921 | West Wittering \ G \ September1921 Scan87 | |
| Report comparing the capacity, volume, and performance of various ignition condensers. | 27th Sep 1921 | West Wittering \ G \ September1921 Scan88 | |
| Condenser capacity experiments for Goshawk and 40/50 chassis ignition systems. | 27th Sep 1921 | West Wittering \ G \ September1921 Scan89 | |
| Test report on the squeaking of thick leaf springs, concluding that forming a radius on the leaf edges is an improvement but not a permanent cure. | 28th Sep 1921 | West Wittering \ G \ September1921 Scan90 | |
| Issues with screwed exhaust joints and recommending a design similar to the 40/50 HP chassis. | 29th Sep 1921 | West Wittering \ G \ September1921 Scan91 | |
| The receipt and testing of a sample Lucas E.5RR dynamo for the Goshawk. | 20th Sep 1921 | West Wittering \ G \ September1921 Scan92 | |
| Technical discussion on dynamo switchbox equipment for the Goshawk, comparing two vs. three conductor switching. | 30th Sep 1921 | West Wittering \ G \ September1921 Scan93 | |
| The bench testing and performance analysis of a dynamo, including its physical specifications. | 30th Sep 1921 | West Wittering \ G \ September1921 Scan94 | |
| The results of a heating test for a machine, detailing temperature and performance findings. | 30th Sep 1921 | West Wittering \ G \ September1921 Scan95 | |
| Graph of ampere output vs. RPM speed curves for a Lucas E.G.R.R. Dynamo for Goshawk under cold and hot conditions. | 29th Sep 1921 | West Wittering \ G \ September1921 Scan96 | |
| On the requirements for the Goshawk 11 practical wiring diagram, its purpose, and recent alterations. | 3rd Apr 1922 | West Wittering \ H \ April1922 Scan0 | |
| Sending a preliminary arrangement drawing (LeC 1541) for the Peregrine engine, showing leading dimensions. | 1st Apr 1922 | West Wittering \ H \ April1922 Scan1 | |
| Instructions for the Peregrine engine's piston and connecting rod. | 4th Jan 1922 | West Wittering \ H \ April1922 Scan2 | |
| Request for competitor information on dynamo and starter motors for comparison with a new design for the Peregrine engine. | 4th Apr 1922 | West Wittering \ H \ April1922 Scan3 | |
| Drawings for the Peregrine Gearbox, noting a design detail is undecided pending completion of the dynamo drive. | 1st Apr 1922 | West Wittering \ H \ April1922 Scan4 | |
| Suggesting a reduction in the diameter of lubrication holes for the Peregrine crankshaft. | 8th Apr 1922 | West Wittering \ H \ April1922 Scan5 | |
| Sending of drawings LeC 1554 and 1555 for the Peregrine change speed and brake levers. | 20th Apr 1922 | West Wittering \ H \ April1922 Scan6 | |
| Design of the Peregrine rear springs, shackles, and frame fittings. | 25th Apr 1922 | West Wittering \ H \ April1922 Scan7 | |
| Design and model creation for the Peregrine chassis and phaeton body. | 26th Apr 1922 | West Wittering \ H \ April1922 Scan8 | |
| Lubrication solution for the Goshawk 11 low tension make and break component. | 4th Apr 1922 | West Wittering \ H \ April1922 Scan9 | |
| Changing the Peregrine crankcase depth dimension and related forthcoming drawings. | 5th Apr 1922 | West Wittering \ H \ April1922 Scan10 | |
| Modification to the de-clutching shaft and ball race housing for the Peregrine clutch, referencing drawing LeC 1544. | 1st Apr 1922 | West Wittering \ H \ April1922 Scan11 | |
| Design and specifications of Goshawk 11 steering levers. | 6th Apr 1922 | West Wittering \ H \ April1922 Scan12 | |
| Design modifications and stress analysis of a steering lever. | 6th Apr 1922 | West Wittering \ H \ April1922 Scan13 | |
| Improvements to the Goshawk 11 side steering tube to eliminate side kicks by substituting balanced springs. | 6th Apr 1922 | West Wittering \ H \ April1922 Scan14 | |
| Page 2 of a letter requesting results before proceeding with alterations to the side steering tube end design. | 8th Mar 1922 | West Wittering \ H \ April1922 Scan15 | |
| Quoting Mr. Royce's opinion on the modification of the cross steering tube changeover procedure. | 7th Apr 1922 | West Wittering \ H \ April1922 Scan16 | |
| Scheme for a carrier to support the wheel on the running boards of the Goshawk 11 model. | 8th Apr 1922 | West Wittering \ H \ April1922 Scan17 | |
| Proposed modifications to the Goshawk 11 front shock absorber. | 10th Apr 1922 | West Wittering \ H \ April1922 Scan18 | |
| Standardisation of batteries and starter motors, questioning the need for a larger battery. | 12th Apr 1922 | West Wittering \ H \ April1922 Scan19 | |
| Proposed modifications to the Goshawk 11 rear shock absorber to prevent toggling. | 12th Apr 1922 | West Wittering \ H \ April1922 Scan20 | |
| Typed document, page 2, suggesting modifications to a shock absorber to reduce toggling. | 13th Apr 1922 | West Wittering \ H \ April1922 Scan21 | |
| Goshawk II engine's ignition advance curve and governor modifications. | 13th Apr 1922 | West Wittering \ H \ April1922 Scan22 | |
| Design of a starting shaft cover with a pip for correct positioning. | 13th Apr 1922 | West Wittering \ H \ April1922 Scan23 | |
| Improvements to the shock damper and steering joints for the No.4 Goshawk vehicle. | 19th Apr 1922 | West Wittering \ H \ April1922 Scan24 | |
| Findings and suggestions for improving spring shackles and front horns. | 19th Apr 1922 | West Wittering \ H \ April1922 Scan25 | |
| Carburation issues on the No.4 Goshawk engine and a note on the fan. | 20th Apr 1922 | West Wittering \ H \ April1922 Scan26 | |
| Proposal to modify the pendulum lever slot on the Goshawk 11 undershield, referencing drawing Lec 1553. | 20th Apr 1922 | West Wittering \ H \ April1922 Scan27 | |
| Calculations for modifying the Goshawk 11 carburetter. | 20th Apr 1922 | West Wittering \ H \ April1922 Scan28 | |
| New inverted arrangement for the Goshawk 11 rear shock absorber. | 20th Apr 1922 | West Wittering \ H \ April1922 Scan29 | |
| Position of the wheel on the running board for Goshawk 11 cars. | 24th Apr 1922 | West Wittering \ H \ April1922 Scan30 | |
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