| Description | Date | Identifier | |
| Meeting minutes discussing the fitting of magnetos, service issues affecting sales, starting and lighting equipment, and design changes. | 10th Dec 1920 | West Wittering \ F \ February1921 Scan18 | |
| Meeting notes discussing design suitability, American market adaptations, and customer demands for new fittings. | 10th Dec 1920 | West Wittering \ F \ February1921 Scan19 | |
| The suitability of U.S.A. Bosch magnetos, comparing radial and flat distributors, and long versus short cams. | 10th Feb 1921 | West Wittering \ F \ February1921 Scan21 | |
| 'Goshawk II' N. Scheme for a spring attachment to an axle. | 10th Feb 1921 | West Wittering \ F \ February1921 Scan22 | |
| From Mr. Royce detailing requested alterations to the 'Goshawk II' front spring shackle design. | 10th Feb 1921 | West Wittering \ F \ February1921 Scan23 | |
| Design notes from Mr. Royce regarding alterations to the Goshawk PT rear axle tube, brake, and hub scheme. | 9th Feb 1921 | West Wittering \ F \ February1921 Scan24 | |
| From 'E' to 'DA' discussing the road spring attachment, axle tube strength, and brake mechanism. | 9th Feb 1921 | West Wittering \ F \ February1921 Scan25 | |
| Alterations requested by Mr. Royce for the 'Goshawk II' components. | 10th Feb 1921 | West Wittering \ F \ February1921 Scan26 | |
| Requested alterations for the 'Goshawk' footbrake adjustment. | 10th Feb 1921 | West Wittering \ F \ February1921 Scan27 | |
| Failures of Cambridge Thermometers and comparing them to a superior Foxboro instrument from the U.S.A. | 10th Feb 1921 | West Wittering \ F \ February1921 Scan28 | |
| Timing of fitting a thermometer and the requirement for a more reliable instrument. | 2nd Feb 1921 | West Wittering \ F \ February1921 Scan29 | |
| Comparison of the Cambridge and USA Foxborough thermometers with notes on fitting. | 14th Feb 1921 | West Wittering \ F \ February1921 Scan30 | |
| Materials and construction of battery cell separators, comparing various makes. | 14th Feb 1921 | West Wittering \ F \ February1921 Scan31 | |
| Modifications to the 'Goshawk II' crankcase front arms and wheelcase. | 14th Feb 1921 | West Wittering \ F \ February1921 Scan32 | |
| The 'Goshawk II' water pump fittings and connections, detailing the draining procedure for the cooling system. | 2nd Feb 1921 | West Wittering \ F \ February1921 Scan33 | |
| Arrangement of a dynamo for the 'Goshawk II' crankcase and a request for supplier catalogues. | 16th Feb 1931 | West Wittering \ F \ February1921 Scan34 | |
| Issues and design evolution of thermostats and radiator shutters for engines, considering practices in the U.S.A. | 16th Feb 1921 | West Wittering \ F \ February1921 Scan35 | |
| Optimal design and placement of radiator louvres and thermostats. | 1st Feb 1921 | West Wittering \ F \ February1921 Scan36 | |
| The performance issues of 40/50 HP cars in America, proposing modifications to the induction and cooling systems. | 16th Feb 1921 | West Wittering \ F \ February1921 Scan37 | |
| Vehicle defects and the standardization of parts for US-produced cars. | 1st Feb 1921 | West Wittering \ F \ February1921 Scan38 | |
| Standardisation of parts between U.S.A. and European models and issues with fuel quality. | 1st Feb 1921 | West Wittering \ F \ February1921 Scan39 | |
| From R. to C.J. regarding car performance and fuel mixtures, specifically a proposed mix of petrol and lamp oil. | 2nd Feb 1921 | West Wittering \ F \ February1921 Scan40 | |
| Review and comparison of an American battery ignition system's components. | 17th Feb 1921 | West Wittering \ F \ February1921 Scan41 | |
| Continued memo discussing a defective distributor and comparing the cost of a Bosch ignition system with their own coil. | 1st Feb 1921 | West Wittering \ F \ February1921 Scan42 | |
| Feasibility of in-house bakerlite moulding and comparing the reliability of Bosch versus Delco ignition systems. | 7th Nov 1921 | West Wittering \ F \ February1921 Scan43 | |
| Comparison of Bosch and Remy distributors, and a commentary on manufacturing capabilities versus American standards. | 1st Feb 1921 | West Wittering \ F \ February1921 Scan44 | |
| Comparison and discussion of various spark plug types including Mercury, Champion, and Lodge. | 17th Feb 1921 | West Wittering \ F \ February1921 Scan45 | |
| Comparing U.S. electrical ignition equipment, specifically Remy and Bosch, with the company's own trembler apparatus. | 17th Feb 1921 | West Wittering \ F \ February1921 Scan46 | |
| Front axle design, wheel choices, and vertical pivots for the Goshawk II schemes. | 17th Feb 1921 | West Wittering \ F \ February1921 Scan47 | |
| Potential alterations to the 40/50 HP induction system, specifically the carburettor and induction pipe. | 17th Feb 1921 | West Wittering \ F \ February1921 Scan48 | |
| Experimental arrangement with alternating plugs in two exhaust manifolds to keep a specific spot hot. | 1st Feb 1921 | West Wittering \ F \ February1921 Scan49 | |
| Operational requirements for the Goshawk II brake hand lever design. | 8th Oct 1935 | West Wittering \ F \ February1921 Scan50 | |
| Drawing Lec.1349 showing additions to the 'Goshawk II' gearbox hand brake mechanism. | 17th Feb 1921 | West Wittering \ F \ February1921 Scan51 | |
| Scheme to add a hot spot to the 40/50 HP induction pipe. | 18th Feb 1921 | West Wittering \ F \ February1921 Scan52 | |
| Request to send a blueprint of the 40/50 HP Hot Spot Induction Pipe to Rolls-Royce of America, as per Mr. Royce's instructions. | 21th Feb 1921 | West Wittering \ F \ February1921 Scan53 | |
| Construction and potential modification of the 'Goshawk II' cylinder head joint washer. | 2nd Feb 1921 | West Wittering \ F \ February1921 Scan54 | |
| The design of the 'Goshawk II' pedal gear and the associated drawing, Lec. /353. | 24th Feb 1921 | West Wittering \ F \ February1921 Scan55 | |
| Proposal for modifications to the 40/50 HP chassis to improve performance with lower grade petrol. | 24th Feb 1921 | West Wittering \ F \ February1921 Scan56 | |
| Cross-current heating scheme for the induction pipe to vaporize liquid fuel. | 1st Feb 1921 | West Wittering \ F \ February1921 Scan57 | |
| The use of thermostats versus hand-operated shutters on chassis radiators. | 23th Apr 1921 | West Wittering \ F \ February1921 Scan58 | |
| Scheme for an apparatus to indicate pressure in high-speed engines. | 24th Feb 1921 | West Wittering \ F \ February1921 Scan59 | |
| Proposal for a battery ignition unit for the 'Goshawk II' engine, seeking feedback on distributor designs. | 23th Feb 1921 | West Wittering \ F \ February1921 Scan60 | |
| Selection, testing, and cost-effectiveness of various spark plug brands. | 24th Feb 1921 | West Wittering \ F \ February1921 Scan61 | |
| Standardisation of carcase dimensions for dynamos and starter motors. | 25th Feb 1921 | West Wittering \ F \ February1921 Scan63 | |
| Material error for the Goshawk II clutch pressure plate. | 25th Feb 1921 | West Wittering \ F \ February1921 Scan64 | |
| Design modification to the 'Goshawk II' engine's induction and exhaust pipes. | 2nd Feb 1921 | West Wittering \ F \ February1921 Scan65 | |
| The repositioning of the brake lever for the 'Goshawk II'. | 25th Feb 1921 | West Wittering \ F \ February1921 Scan66 | |
| Experimental bench investigation of a Westinghouse vibrator regulator and combined cut-out. | 2nd Feb 1921 | West Wittering \ F \ February1921 Scan68 | |
| Analysis of the performance and design flaws of an electrical regulator and cut-out apparatus. | 2nd Feb 1921 | West Wittering \ F \ February1921 Scan69 | |
| Analysis of the compound windings on the regulator side of the cut-out and their effect on dynamo speed and current delivery. | 2nd Feb 1921 | West Wittering \ F \ February1921 Scan70 | |
| Analysis of voltage regulation and performance curves for a 12-volt dynamo and battery system. | 2nd Feb 1921 | West Wittering \ F \ February1921 Scan71 | |
| Continued analysis of regulator coil performance, current variation, and temperature compensation. | 2nd Feb 1921 | West Wittering \ F \ February1921 Scan72 | |
| Outlining the principles for designing an external voltage regulator for a dynamo, considering speed and temperature. | 2nd Feb 1921 | West Wittering \ F \ February1921 Scan73 | |
| Comparing the efficiency of American Alemite grease guns to the standard Rotherham lubricators. | 1st Feb 1921 | West Wittering \ F \ February1921 Scan75 | |
| Results of experimental bench tests on various Bosch magnetos. | 3rd Feb 1921 | West Wittering \ F \ February1921 Scan76 | |
| Page detailing measurements and contact breaker timing for different types of magnetos. | 10th Dec 1920 | West Wittering \ F \ February1921 Scan77 | |
| Comparison of specifications for various magneto machines, including Bosch and Watford models. | 3rd Feb 1921 | West Wittering \ F \ February1921 Scan78 | |
| Test report on magneto timing, endurance, and performance comparison of various models. | 21th Dec 1931 | West Wittering \ F \ February1921 Scan79 | |
| Magneto testing, detailing distributor condition and electrical test results. | 3rd Feb 1921 | West Wittering \ F \ February1921 Scan80 | |
| Test report page detailing breakdowns and utility tests on various magneto machines. | 10th Dec 1920 | West Wittering \ F \ February1921 Scan81 | |
| Comparison of maximum gap tests and sparking characteristics for various magnetos. | 1st Feb 1921 | West Wittering \ F \ February1921 Scan82 | |
| Comparison of low-speed sparking performance for various magnetos. | 10th Dec 1920 | West Wittering \ F \ February1921 Scan83 | |
| The high-speed sparking characteristics of R.Bosch and U.S.A. Bosch Z.R.6 magnetos. | 3rd Feb 1921 | West Wittering \ F \ February1921 Scan84 | |
| Comparison of electrical characteristics, including resistance and current, between Bosch and Watford magnetos. | 3rd Feb 1921 | West Wittering \ F \ February1921 Scan85 | |
| Revised schedule of tests for the new E.O.6 Watfords which are replacing older models. | 22th Jul 1920 | West Wittering \ F \ February1921 Scan86 | |
| Failure of 'Exide' battery cells due to poor quality separators and the need for a more reliable alternative. | 7th Feb 1921 | West Wittering \ F \ February1921 Scan88 | |
| Short-circuiting issues in Exide batteries and ongoing tests with alternative battery suppliers. | 7th Feb 1921 | West Wittering \ F \ February1921 Scan89 | |
| Standardisation and internal components of various types of batteries. | 7th Feb 1921 | West Wittering \ F \ February1921 Scan90 | |
| Directive to abandon experimental work on vibrator regulators and focus on a simpler dynamo design. | 9th Feb 1921 | West Wittering \ F \ February1921 Scan91 | |
| Instruction to abandon experimental work on a vibratory regulator and focus on a simpler third-brush dynamo design. | 28th Jun 1933 | West Wittering \ F \ February1921 Scan92 | |
| Preliminary report on the B.T.H. type F.M.6 magneto, with comparisons to other magnetos. | 10th Feb 1921 | West Wittering \ F \ February1921 Scan93 | |
| Comparison of the construction and materials of R. Bosch, U.S.A. Bosch, and Watford magnetos. | 10th Feb 1921 | West Wittering \ F \ February1921 Scan94 | |
| Preliminary report on the B.T.H. Magneto F.M.6. | 10th Dec 1920 | West Wittering \ F \ February1921 Scan95 | |
| Continued description of a jump spark distributor's components, including its cover, distribution gear, and lubrication system. | 10th Dec 1920 | West Wittering \ F \ February1921 Scan96 | |
| Failure of Champion and Mercury ignition plugs during testing and proposing design modifications. | 1st Apr 1921 | West Wittering \ F \ February1921 Scan97 | |
| The combined operation of pre-war and post-war Bosch dynamo and regulator systems. | 14th Feb 1921 | West Wittering \ F \ February1921 Scan98 | |
| The testing of a regulator and switchbox, focusing on the effects of vibration and open circuit voltage. | 14th Feb 1921 | West Wittering \ F \ February1921 Scan99 | |
| Testing and adjusting the current regulator for a battery charging system under various conditions. | 14th Feb 1921 | West Wittering \ F \ February1921 Scan100 | |
| Test report on dynamo and regulator performance, detailing current output and operational issues. | 14th Feb 1921 | West Wittering \ F \ February1921 Scan101 | |
| The combined operation of a dynamo and cut-out, with test results under cold and hot conditions. | 14th Feb 1921 | West Wittering \ F \ February1921 Scan102 | |
| Graph showing the open circuit volt-speed characteristic of a Bosch Dynamo and Carbon Granule Regulator. | 15th Dec 1926 | West Wittering \ F \ February1921 Scan103 | |
| Ignition timing requirements for a small engine, including lead and retard angles. | 1st Feb 1921 | West Wittering \ F \ February1921 Scan104 | |
| Rejection of the Hampden Pump in favour of an in-house designed mechanical air pump. | 25th Feb 1921 | West Wittering \ F \ February1921 Scan105 | |
| The discharge capacity and voltage tests of a sample Nickel-Iron (NI-FE) battery cell. | 1st Jan 1921 | West Wittering \ F \ January1921 Scan0 | |
| Test results detailing the discharge rate, voltage drop, and capacity of a 10-cell battery. | 1st Jan 1921 | West Wittering \ F \ January1921 Scan1 | |
| Considering alternative American-made magnetos for the 40/50 chassis due to issues with the standard part. | 1st Jan 1921 | West Wittering \ F \ January1921 Scan2 | |
| The standardisation and testing of magnetos for U.S.A. and Derby-built cars, comparing them to the R. Bosch Z.R.6 model. | 21th Jan 1921 | West Wittering \ F \ January1921 Scan3 | |
| The investigation and testing of magnetos from various companies. | 1st Jan 1921 | West Wittering \ F \ January1921 Scan4 | |
| The 'Radamax' Plug Tester instrument, detailing its construction and operating principles. | 7th Jan 1921 | West Wittering \ F \ January1921 Scan6 | |
| Experiments with a 'Radamax' spark plug tester, analyzing spark characteristics under various conditions. | 7th Jan 1921 | West Wittering \ F \ January1921 Scan7 | |
| Evaluation of the 'Radamax' plug tester, discussing its functionality, performance, and price. | 7th Jan 1921 | West Wittering \ F \ January1921 Scan8 | |
| Procedure for a 'utility' test of a spark coil or magneto. | 7th Jan 1921 | West Wittering \ F \ January1921 Scan9 | |
| Page from a report on comparative utility tests between a magneto and a battery ignition system, discussing spark performance and leakage paths. | 21th Dec 1920 | West Wittering \ F \ January1921 Scan10 | |
| Comparative sparking test results for a Watford E.6 magneto and a standard battery ignition system on a utility test. | 21th Dec 1920 | West Wittering \ F \ January1921 Scan11 | |
| Effect of an auxiliary external gap on improving sparking in battery ignition systems under adverse conditions. | 7th Jan 1921 | West Wittering \ F \ January1921 Scan12 | |
| Continued memo discussing heating and speed related to the position of brushes in a shunt wound condition. | 8th Jan 1921 | West Wittering \ F \ January1921 Scan13 | |
| Table showing the results of comparative heating tests on armature reaction controlled dynamos at constant output. | 30th Dec 1920 | West Wittering \ F \ January1921 Scan14 | |
| Test report on the effect of an auxiliary gap in improving ignition coil sparking. | 31th Dec 1920 | West Wittering \ F \ January1921 Scan16 | |
| Preference for separate starter motors and dynamos over combined units for simplicity and ease of repair. | 12th Jan 1921 | West Wittering \ F \ January1921 Scan17 | |
| The performances of shunt wound dynamos suitable for external regulator control. | 1st Jan 1921 | West Wittering \ F \ January1921 Scan18 | |
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