| Description | Date | Identifier | |
| Effects of suspension arm friction on front and rear brake operation. | 17th Oct 1927 | Box 66 \ 5 scan0123 | |
| Drawing showing the various positions of a servo system's suspension arm. | 17th Oct 1927 | Box 66 \ 5 scan0124 | |
| Schematic layout of a complete braking system, including front, rear, servo, and foot pedal components. | 15th Oct 1927 | Box 66 \ 5 scan0125 | |
| Modification to reduce front braking on 40/50 HP cars, citing issues caused by Australian roads. | 17th Oct 1927 | Box 66 \ 5 scan0126 | |
| Accidents in Australia caused by fierce front braking on unmetalled roads and the recommended corrective action. | 17th Oct 1927 | Box 66 \ 5 scan0127 | |
| Letter regarding depot reports on brake servo system adjustments and an attached memo for review. | 17th Oct 1927 | Box 66 \ 5 scan0128 | |
| Requested chassis modifications for the first two sports cars, specifically regarding the brake lever, rear spring, and framed instruments. | 31th Oct 1927 | Box 66 \ 5 scan0129 | |
| Mechanics of a braking system and refuting a claim about a swinging arm. | 31th Oct 1927 | Box 66 \ 5 scan0130 | |
| With diagrams explaining a difficulty with the 40/50 HP servo front equaliser shaft and brake leverage. | 1st Feb 1927 | Box 66 \ 5 scan0131 | |
| Continued analysis of front brake snatching and thumps, with a proposed solution involving a stop. | 1st Feb 1927 | Box 66 \ 5 scan0132 | |
| Diagram and explanation of the 40/50 Swinging Link mechanism. | 29th Nov 1927 | Box 66 \ 5 scan0133 | |
| Test report on the effect of adding a steel band damper to a front brake drum to stop brake squeak. | 29th Nov 1927 | Box 66 \ 5 scan0134 | |
| Letter from America acknowledging information on the action of the servo for a bulletin on brakes. | 28th Nov 1927 | Box 66 \ 5 scan0135 | |
| Confirming the decision to use cast aluminium for brake straps instead of duralumin. | 9th Dec 1927 | Box 66 \ 5 scan0136 | |
| Changes to the front equalising shaft levers for the sports car braking system, specifically for the 10-EX model. | 14th Dec 1927 | Box 66 \ 5 scan0137 | |
| Comparison of different brake distribution setups and calculations for sports car applications. | 14th Dec 1927 | Box 66 \ 5 scan0138 | |
| Calculation of the torque required on 40/50 servo gears to lock the rear wheels. | 5th Jan 1928 | Box 66 \ 5 scan0139 | |
| Fitting Raybestos brake linings to a Sports Phantom and Tenoid linings to a 12-EX model. | 5th Jan 1928 | Box 66 \ 5 scan0140 | |
| Weight comparison between standard brakes and side by side brakes, detailing component weights and total weight saved. | 1st May 1928 | Box 66 \ 5 scan0141 | |
| Production and testing process for a new set of brake drums for a Phantom car. | 18th Jul 1928 | Box 66 \ 5 scan0142 | |
| Letter to Rolls Royce of America regarding issues and design features of the front brakes on the 61-RF English Phantom. | 19th Jul 1928 | Box 66 \ 5 scan0143 | |
| Letter explaining a design decision about a Duralumin flange and advising on safe braking with four-wheel brakes while steering. | 16th Aug 1928 | Box 66 \ 5 scan0144 | |
| Letter from the American branch regarding front brake trouble on an English Phantom 61-RF. | 16th Aug 1928 | Box 66 \ 5 scan0145 | |
| Recommendation to modify the drain pipe on the Phantom's side-by-side rear brakes to prevent mud clogging. | 9th Oct 1928 | Box 66 \ 5 scan0146 | |
| Proposal for a main grease drain for side by side brakes, noting the required alterations. | 23th Oct 1928 | Box 66 \ 5 scan0147 | |
| Tests to overcome brake squeaks on the Phantom model by modifying the damper sectors. | 2nd Nov 1928 | Box 66 \ 5 scan0148 | |
| Letter to K.B. Speid Esq. explaining the issues with oil pump servo mechanisms in braking systems. | 2nd Nov 1928 | Box 66 \ 5 scan0149 | |
| Experimental use of nitrate steel for water pump shafts and brake drums. | 6th Nov 1928 | Box 66 \ 5 scan0150 | |
| Recommending the adoption of part number N.sch.2746 for the drain on side by side rear brakes. | 26th Nov 1928 | Box 66 \ 5 scan0151 | |
| Explaining the reasons for replacing experimental duralumin forged brake shoes with cast shoes. | 9th Jan 1929 | Box 66 \ 5 scan0152 | |
| Inquiring about the effectiveness of the rear brake mud shield on the Phantom model. | 19th Jan 1929 | Box 66 \ 5 scan0153 | |
| Technical response concerning the performance of Phantom Rear Brakes in muddy conditions. | 25th Jan 1929 | Box 66 \ 5 scan0154 | |
| Front braking alteration for Malcolm Campbell's Phantom car by reverting to an earlier front equaliser shaft. | 20th Jun 1929 | Box 66 \ 5 scan0155 | |
| Cost breakdown for re-lining Phantom Brakes of the Side-by-Side Type. | 1st Nov 1929 | Box 66 \ 5 scan0156 | |
| Secret memo concerning a copy of Mr. Royce's memo on small modifications to the EAC.4 carburetter. | 10th Feb 1924 | Box 66a \ 1 scan0001 | |
| Secret memo suggesting five modifications to a carburetter design for the EAC X.9080. | 2nd Feb 1924 | Box 66a \ 1 scan0002 | |
| Secret memorandum outlining questions and suggestions for engine and chassis improvements. | 10th Mar 1924 | Box 66a \ 1 scan0003 | |
| Page 2 of a memo detailing improvements for vehicle clutch, brake, and exhaust systems. | 7th Jul 1924 | Box 66a \ 1 scan0004 | |
| Drawings for lightweight air valves and a proposal to test a smaller low-speed throat for a carburetter. | 7th Jul 1924 | Box 66a \ 1 scan0005 | |
| Modifications to the Goshawk III carburetter accompanying drawing No.LeC.1900. | 7th Jul 1924 | Box 66a \ 1 scan0006 | |
| Secret memorandum on carburetter design considerations for the air valve, piston, and throat. | 18th Jul 1924 | Box 66a \ 1 scan0007 | |
| Two schemes for the carburetter mixture control, referencing associated drawings. | 3rd Oct 1924 | Box 66a \ 1 scan0008 | |
| Secret memorandum discussing improvements to the slow running performance of the EAC.11 engine. | 10th Jun 1924 | Box 66a \ 1 scan0009 | |
| Secret internal memo detailing a visit and inspection of a carburetter on an EAC.2 chassis. | 23th Oct 1924 | Box 66a \ 1 scan0010 | |
| Request for a recommendation on making the accelerator pedal throttle opening more gradual for the 93-NK car. | 29th Oct 1924 | Box 66a \ 1 scan0011 | |
| Scheme for improving carburation by increasing water temperature to the carburetter and throttle valve. | 17th Dec 1925 | Box 66a \ 1 scan0012 | |
| Investigations into the EAC carburetter, including test bench and road tests. | 15th Jan 1925 | Box 66a \ 1 scan0013 | |
| Page 2 of a memorandum discussing modifications to carburetter designs for the 40/50 HP and new EAC models. | 15th Jan 1925 | Box 66a \ 1 scan0014 | |
| The carburetter for the EAC engine. | 15th Jan 1925 | Box 66a \ 1 scan0015 | |
| Carburetter mixture control adjustments and performance. | 25th Sep 1924 | Box 66a \ 1 scan0016 | |
| The performance and characteristics of an EAC carburetter under various load conditions. | 25th Sep 1924 | Box 66a \ 1 scan0017 | |
| Issues and operational principles of the EAC carburetter for the 40/50 HP engine. | 1st Jan 1925 | Box 66a \ 1 scan0018 | |
| Carburettor design for increased power output, detailing throat size and depression characteristics. | 15th Jan 1925 | Box 66a \ 1 scan0019 | |
| Modifications to an EAC carburetter to match the performance of the standard 40/50 HP carburetter. | 15th Jan 1925 | Box 66a \ 1 scan0020 | |
| Comparing the performance of a standard 40/50 HP carburetter with a converted EAC carburetter on an EAC engine. | 15th Jan 1925 | Box 66a \ 1 scan0021 | |
| Graph comparing the power output of an E.A.C. engine with different carburettors, plotting Brake Horsepower (BHP) against Revolutions Per Minute (RPM). | 15th Jan 1925 | Box 66a \ 1 scan0022 | |
| Graph comparing carburetter metering performance under light loads and throttled conditions for various setups. | 15th Jan 1925 | Box 66a \ 1 scan0023 | |
| Graph comparing carburettor mixture settings against engine RPM for various E.A.C. carburettor configurations under light load. | 15th Jan 1925 | Box 66a \ 1 scan0024 | |
| Graph comparing E.A.C. & 40/50 carburetters on an E.A.C. engine under full load. | 15th Jan 1925 | Box 66a \ 1 scan0025 | |
| Graph plotting depression in the carburettor mixing chamber against R.P.M. for standard and converted carburettors. | 15th Jan 1925 | Box 66a \ 1 scan0026 | |
| Design drawing for an experimental carburettor's suction chamber and high speed throat. | 21th Jan 1925 | Box 66a \ 1 scan0027 | |
| Secret internal memo regarding the testing of carburetter modifications. | 21th Jan 1925 | Box 66a \ 1 scan0028 | |
| The spring loading for a carburetter throttle, including spring specifications and test results. | 24th Jan 1925 | Box 66a \ 1 scan0029 | |
| Secret memo providing instructions for oil relay ignition control and the carburetter. | 30th Jan 1925 | Box 66a \ 1 scan0030 | |
| Setting up and fitting a carburetter. | 1st Jan 1925 | Box 66a \ 1 scan0031 | |
| Page detailing specifications for float, filter, and jet valve components. | 25th Sep 1924 | Box 66a \ 1 scan0032 | |
| The adjustment procedures for carburetter components like jet tubes, operating rods, and levers. | 26th Jan 1925 | Box 66a \ 1 scan0033 | |
| Testing procedures for carburettor components including the jet operating lever and petrol float chamber. | 26th Jan 1925 | Box 66a \ 1 scan0034 | |
| Procedures for checking petrol levels and flow in a carburetter float chamber. | 25th Sep 1924 | Box 66a \ 1 scan0035 | |
| The specifications for air valve and suction chamber units. | 28th Jan 1925 | Box 66a \ 1 scan0036 | |
| The fitting and testing procedures for an air valve spring and air piston. | 28th Jan 1935 | Box 66a \ 1 scan0037 | |
| The method for adjusting the E.A.C. Carburetter. | 29th Jan 1925 | Box 66a \ 1 scan0038 | |
| Page 2 of an experimental report detailing engine tuning and testing procedures. | 28th Jan 1925 | Box 66a \ 1 scan0039 | |
| Engine carburetter settings and performance characteristics. | 29th Jan 1925 | Box 66a \ 1 scan0040 | |
| Graph comparing the power output of an E.A.C. engine with different carburettors against R.P.M. | 17th Feb 1925 | Box 66a \ 1 scan0041 | |
| Graph comparing carburetter metering performance under light, throttled loads for various configurations. | 17th Feb 1925 | Box 66a \ 1 scan0042 | |
| Graph comparing mixture control settings against RPM for different carburettors on an E.A.C. engine under full load. | 17th Feb 1925 | Box 66a \ 1 scan0043 | |
| Graph comparing depression in the mixing chamber versus RPM for standard and converted carburetter configurations. | 17th Feb 1925 | Box 66a \ 1 scan0044 | |
| Blueprint detailing the testing procedures and settings for an E.A.C. Carburetter. | 28th Jan 1925 | Box 66a \ 1 scan0045 | |
| Required washers and high-speed valve specifications for the EAC carburetter. | 16th Mar 1925 | Box 66a \ 1 scan0046 | |
| Secret memo discussing design improvements for an adjustable throttle lever. | 17th Mar 1925 | Box 66a \ 1 scan0047 | |
| And suggesting modifications to the accelerator movements for the EAC and 40/50 HP models. | 22th Apr 1925 | Box 66a \ 1 scan0048 | |
| Blueprint detailing the accelerator pedal movement and linkage for the 40/50 model. | 21th Apr 1925 | Box 66a \ 1 scan0049 | |
| Diagram and calculations for the E.A.C. accelerator pedal and throttle linkage movement. | 21th Apr 1925 | Box 66a \ 1 scan0050 | |
| Carburetter heating, comparing the advantages and disadvantages of reverting to a water-heated throttle system. | 1st May 1925 | Box 66a \ 1 scan0051 | |
| Tests on the exhaust heated throttle, choke valve, and their effects on engine power. | 1st May 1925 | Box 66a \ 1 scan0052 | |
| Power reduction due to a choke valve and a seasonal overheating issue in Australia. | 1st May 1925 | Box 66a \ 1 scan0053 | |
| Carburettor and ignition plug issues for the New Phantom model, requesting replacement parts. | 30th Jun 1925 | Box 66a \ 1 scan0054 | |
| New shutter control system from West Wittering for the 'X' Series and 7-EX models. | 7th Aug 1925 | Box 66a \ 1 scan0055 | |
| Design and specifications for petrol filters and future fuel tanks. | 20th Aug 1925 | Box 66a \ 1 scan0056 | |
| Fuel filter gauze standards, materials, and maintenance issues. | 1st Aug 1925 | Box 66a \ 1 scan0057 | |
| Carburetter needle taper and non-standard filter mesh on the New Phantom and Goshawk models, with a request for a replacement filter. | 1st Aug 1925 | Box 66a \ 1 scan0058 | |
| The failure of an E.A.C. carburetter filter and outlining proposed design improvements. | 24th Aug 1925 | Box 66a \ 1 scan0059 | |
| Comparing the E.A.C. carburetter's low-speed jet on the New Phantom and Silver Ghost models. | 1st Aug 1925 | Box 66a \ 1 scan0060 | |
| Changing filters to fine mesh for 20 HP and 40 HP models to prevent choked jets. | 25th Aug 1925 | Box 66a \ 1 scan0061 | |
| Carburetter filter problems, clarifying a previous instruction, and proposing solutions for choked jets. | 26th Aug 1925 | Box 66a \ 1 scan0062 | |
| Change from exhaust heating to water heating for the EAC carburetter on the New Phantom model. | 9th Sep 1925 | Box 66a \ 1 scan0063 | |
| Use of monel metal gauze in petrol filters for carburetters. | 1st Sep 1925 | Box 66a \ 1 scan0064 | |
| Proposed modification to the exhaust heating system on the New Phantom model. | 1st Sep 1925 | Box 66a \ 1 scan0065 | |
| Carburetter petrol flow and float weight. | 29th Sep 1925 | Box 66a \ 1 scan0066 | |
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