| Description | Date | Identifier | |
| Extract detailing an oil leak issue with the vacuum pump on the S.S. Chassis and proposing a fix. | 1st Aug 1929 | Box 64 \ 1 scan0046 | |
| Proposal for a design change to the J.2 Series Vacuum Pump to re-route its air exhaust. | 16th Aug 1929 | Box 64 \ 1 scan0047 | |
| Standard production test procedure for the Autovac fuel system to ensure efficient operation. | 6th Aug 1929 | Box 64 \ 1 scan0048 | |
| Recommendation to return faulty Autovacs to the makers for rectification due to potential petrol supply issues. | 22th Aug 1929 | Box 64 \ 1 scan0049 | |
| Modification to address over-oiling on the vacuum pump by discharging its exhaust into the crankcase. | 22th Aug 1929 | Box 64 \ 1 scan0050 | |
| Arranging to send a vacuum pump piston connecting rod and eccentric to Autovac Manfg. Co. Ltd. for testing. | 29th Aug 1929 | Box 64 \ 1 scan0051 | |
| Letter from Autovac Manfg. Co. Ltd. acknowledging a letter and awaiting the arrival of a vacuum pump for reporting. | 28th Aug 1929 | Box 64 \ 1 scan0052 | |
| Proposing to hold up the testing of autovacs pending further instructions. | 2nd Sep 1929 | Box 64 \ 1 scan0053 | |
| Recurring failure in the Autovac petrol system and the necessity for further testing. | 2nd Sep 1929 | Box 64 \ 1 scan0054 | |
| Comparative tests of a non-return valve in the Phantom II petrol supply system. | 28th Oct 1929 | Box 64 \ 1 scan0055 | |
| Graph comparing the petrol delivery of a Phantom II feed system with and without a non-return valve, measured against engine RPM. | 1st Mar 1930 | Box 64 \ 1 scan0056 | |
| Dangerous Phantom II Autovac petrol supply failure causing the crankchamber to fill with petrol. | 1st Mar 1930 | Box 64 \ 1 scan0057 | |
| Float mechanism failure, suggesting reproduction on experimental cars and retrospective action. | 8th Mar 1930 | Box 64 \ 1 scan0058 | |
| The failure and subsequent redesign of the Phantom II Autovac petrol supply float. | 12th Mar 1930 | Box 64 \ 1 scan0059 | |
| Petrol supply failure on Chassis No 21 EX, caused by a leaking Autovac float. | 27th Mar 1930 | Box 64 \ 1 scan0060 | |
| Dispatch of spare floats and the replacement of Autovacs for the Phantom II due to petrol supply failures. | 2nd Apr 1930 | Box 64 \ 1 scan0061 | |
| Recurring failures of the Autovac petrol supply float in the Phantom II model. | 2nd Apr 1930 | Box 64 \ 1 scan0062 | |
| Relocation of the petrol filter and the potential for air locks. | 24th May 1930 | Box 64 \ 1 scan0063 | |
| Return of autovac tanks with aluminium tops for modifications before testing. | 4th Jun 1930 | Box 64 \ 1 scan0064 | |
| Testing Autovacs with Aluminium heads versus Brass heads for 40/50-HP and 20/25-HP chassis. | 6th Jun 1930 | Box 64 \ 1 scan0065 | |
| Cooling system tests conducted at Brooklands between the 17th and 20th of June 1930. | 25th Jun 1930 | Box 64 \ 1 scan0066 | |
| Engine cooling improvements through various ventilation methods like bonnet shutters and undershields. | 28th Feb 1931 | Box 64 \ 1 scan0067 | |
| Analysis of engine cooling systems, radiator variations, and oil temperatures during vehicle testing. | 25th May 1930 | Box 64 \ 1 scan0068 | |
| Vehicle performance issues related to ignition advance, overheating, and petrol supply during lap speed testing. | 1st Jul 1925 | Box 64 \ 1 scan0069 | |
| Test report comparing vehicle performance, noting issues with an American car's speed and durability, and investigating the effects of bonnet ventilation and fan belt tension. | 1st Jul 1925 | Box 64 \ 1 scan0070 | |
| Water circulation experiments, pump performance, and comparisons with the American Phantom II. | 28th Aug 1930 | Box 64 \ 1 scan0071 | |
| Improving engine cooling through modifications to the undershield, fan, radiator, and bonnet for high-speed performance. | 25th Jun 1931 | Box 64 \ 1 scan0072 | |
| Graph plotting top water, bottom water, and oil temperatures against miles run under specific test conditions. | 25th Jun 1931 | Box 64 \ 1 scan0073 | |
| Graph of overheating test results for a Phantom II Cabriolet with various bonnet and undershield configurations. | 25th Jun 1931 | Box 64 \ 1 scan0074 | |
| Graph plotting top and bottom water temperatures against various bonnet and shutter configurations. | 25th Jun 1931 | Box 64 \ 1 scan0075 | |
| Graph plotting oil and water temperature against miles run during a vehicle test. | 25th Jun 1931 | Box 64 \ 1 scan0076 | |
| Graph comparing the critical ATS temperature for a spring-tensioned fan versus a positively tensioned fan belt at 62 MPH with no bonnet ventilation. | 25th Jun 1931 | Box 64 \ 1 scan0077 | |
| Graph comparing top water temperature against miles run for two experimental vehicle configurations (18 E.X. and 19 E.X.). | 26th Jun 1934 | Box 64 \ 1 scan0078 | |
| Blueprint showing a modification to the front undershield to improve the cooling system. | 26th Jun 1934 | Box 64 \ 1 scan0079 | |
| Testing a modified self-draining float for the Autovac petrol feed system to prevent failure from temperature effects. | 4th Jul 1930 | Box 64 \ 1 scan0080 | |
| Self-draining float for the Autovac system and a recommendation for its adoption. | 4th Jul 1930 | Box 64 \ 1 scan0081 | |
| The production start date for a larger Autovac valve for the Phantom II to overcome petrol trouble. | 4th Jul 1930 | Box 64 \ 1 scan0082 | |
| Standardisation report for a larger Autovac float chamber tank and valve to overcome petrol starvation at high speeds. | 4th Jun 1930 | Box 64 \ 1 scan0083 | |
| Second report on Brooklands radiator tests, detailing issues with the autovac fuel supply system. | 9th Jul 1930 | Box 64 \ 1 scan0084 | |
| Analysis of how high air intake temperatures affect vacuum pump efficiency and cause fuel supply issues. | 9th Jul 1930 | Box 64 \ 1 scan0085 | |
| Cooling system fan belt alternatives and mixture strength issues at high speed. | 9th Jul 1930 | Box 64 \ 1 scan0086 | |
| Tests related to pre-ignition, over-heating, radiator matrices and radiator bottom outlets. | 9th Jul 1930 | Box 64 \ 1 scan0087 | |
| Engine cooling circulation tests, analyzing water temperature changes with restricted flow and varying vehicle speeds. | 9th Jul 1930 | Box 64 \ 1 scan0088 | |
| Analysis of vehicle cooling system performance, considering factors like fan efficiency, wind, and temperatures. | 9th Jul 1930 | Box 64 \ 1 scan0089 | |
| Recommendations for improvements to the fan belt, autovac, and cooling system, with proposed further tests. | 19th Jul 1930 | Box 64 \ 1 scan0090 | |
| Blueprint with graphs showing the effects of fan, speed, and ventilation on a vehicle's cooling system. | 2nd Jul 1930 | Box 64 \ 1 scan0091 | |
| Series of graphs showing the effect of water circulation on overheating in a PII water system. | 2nd Jul 1930 | Box 64 \ 1 scan0092 | |
| Line graph from a Brooklands test plotting top and bottom water temperature against various engine cooling configurations. | 2nd Jul 1930 | Box 64 \ 1 scan0093 | |
| Graph showing the effect of temperature on complete car circulation and pump suction. | 23th Jul 1930 | Box 64 \ 1 scan0094 | |
| Unsatisfactory fixing arrangements and poor appearance of an Autovac tank. | 23th Jul 1930 | Box 64 \ 1 scan0095 | |
| Complaint and suggesting design improvements for the Autovac tank stud and nut assembly. | 24th Jul 1930 | Box 64 \ 1 scan0096 | |
| Recommendation to adopt the Autovac Company's modified self-draining float. | 28th Jul 1930 | Box 64 \ 1 scan0097 | |
| Standardisation and production of a new self-draining float for the Autovac battery feed system. | 14th Aug 1930 | Box 64 \ 1 scan0098 | |
| The reduction of reserve petrol in the Autovac to prevent engine starvation. | 1st Aug 1930 | Box 64 \ 1 scan0099 | |
| Reduced fuel reserve in the Autovac tank for Phantom II chassis by replacing the main feed pipe. | 20th Aug 1930 | Box 64 \ 1 scan0100 | |
| Standardisation of a self-draining autovac float with larger stem and vent holes. | 14th Jul 1930 | Box 64 \ 1 scan0101 | |
| Standardisation of an Autovac top in aluminium for chassis parts. | 28th Jun 1930 | Box 64 \ 1 scan0102 | |
| Requesting a check of dimensions and completion of calculations for the 'SEAGULL' starting motor. | 19th Oct 1922 | Box 64 \ 1 scan0103 | |
| Request for the reduction ratio and piston displacement for 'Seagull' starter motor calculations. | 30th Nov 1922 | Box 64 \ 1 scan0104 | |
| Specifications for a starter motor, including pinion, flywheel, and epicyclic reduction gear ratios. | 15th Feb 1923 | Box 64 \ 1 scan0105 | |
| Alterations for a 40/50 dynamo and an E.A.C. starter motor, including specifications and sketches. | 28th Feb 1923 | Box 64 \ 1 scan0106 | |
| Electrical specifications and gear ratios for a starter motor system. | 20th Mar 1923 | Box 64 \ 1 scan0107 | |
| Starter motor to engine gear ratio, questioning the proposed 32 to 1 reduction. | 20th Mar 1923 | Box 64 \ 1 scan0108 | |
| The design requirements for motor windings to handle engine starting and compression. | 20th Mar 1923 | Box 64 \ 1 scan0109 | |
| Requesting a decision on the E.A.C. starter motor reduction ratio and arranging a follow-up meeting with Mr. Royce. | 9th Apr 1923 | Box 64 \ 1 scan0110 | |
| Starter motor gearing ratio and starting speed. | 12th Apr 1923 | Box 64 \ 1 scan0111 | |
| Table comparing the dimensions and ratios for various dynamo and motor sizes. | 18th Apr 1923 | Box 64 \ 1 scan0112 | |
| Technical memorandum comparing the suitability of a Goshawk starter motor for an E.A.C. engine, including E.M.F. calculations. | 5th May 1923 | Box 64 \ 1 scan0113 | |
| Calculations of polar flux density and related quantities for Goshawk and E.A.C. motors. | 5th May 1923 | Box 64 \ 1 scan0114 | |
| Technical analysis of motor performance, discussing flux density, torque, and calculations related to the Goshawk motor. | 5th May 1923 | Box 64 \ 1 scan0115 | |
| Calculations for E.A.C. and Goshawk starter motors, focusing on the number of conductors. | 30th Apr 1923 | Box 64 \ 1 scan0116 | |
| Calculations for an E.A.C. starter motor. | 30th Apr 1923 | Box 64 \ 1 scan0117 | |
| Page of calculations for an electric motor, detailing flux, conductors, and back E.M.F. | 30th Apr 1923 | Box 64 \ 1 scan0118 | |
| Page of calculations for armature resistance, length, and cross-sectional area. | 30th Apr 1923 | Box 64 \ 1 scan0119 | |
| Calculations for slot area, depth, and width using copper space efficiency. | 30th Apr 1923 | Box 64 \ 1 scan0120 | |
| Calculation table for ampere-turns needed to produce the required magnetic flux. | 30th Apr 1923 | Box 64 \ 1 scan0121 | |
| Calculations for determining field winding resistance and equivalent wire gauge. | 30th Apr 1923 | Box 64 \ 1 scan0122 | |
| Calculations for the adaptation of a Goshawk-sized starter motor for an E.A.C. engine. | 30th Apr 1923 | Box 64 \ 1 scan0123 | |
| Page of engineering calculations for flux and conductors. | 16th May 1923 | Box 64 \ 1 scan0124 | |
| Secret memo discussing design improvements and performance specifications for a starter motor, including a revised drawing. | 16th May 1923 | Box 64 \ 1 scan0125 | |
| Two alternative proposals for starter motor windings. | 30th May 1923 | Box 64 \ 1 scan0126 | |
| Continued discussion on motor calculations and performance, specifically addressing abnormal results due to a high reduction ratio. | 30th May 1923 | Box 64 \ 1 scan0127 | |
| Continued discussion on motor efficiency calculations, current, torque, and conductor design. | 30th May 1923 | Box 64 \ 1 scan0128 | |
| Revised calculations for an E.A.C. starter motor under unfavourable starting conditions. | 30th May 1923 | Box 64 \ 1 scan0129 | |
| Calculations for static torque, polar flux density, and armature design. | 30th May 1923 | Box 64 \ 1 scan0130 | |
| Calculations for motor E.M.F. and resistance, including armature and field resistance. | 30th May 1923 | Box 64 \ 1 scan0131 | |
| Page of calculations for armature design, including resistance, slot dimensions, and tooth width. | 30th May 1923 | Box 64 \ 1 scan0132 | |
| Calculation table for Ampere Turns required to produce a specific magnetic flux in various components. | 30th May 1923 | Box 64 \ 1 scan0133 | |
| Page of calculations for electrical field windings, including ampere turns, resistance, and wire gauge. | 30th May 1923 | Box 64 \ 1 scan0134 | |
| Motor winding specifications, including turns, resistance, and flux density. | 23th May 1923 | Box 64 \ 1 scan0135 | |
| Secret blueprint showing revised dimensions for a starter motor. | 23th May 1923 | Box 64 \ 1 scan0136 | |
| Calculations for the 40/50 starter motor and proposing new overload test conditions and design modifications. | 4th Jun 1923 | Box 64 \ 1 scan0137 | |
| Technical memo discussing the design and characteristics of a motor, specifically its teezer circuit and windings. | 1st Jun 1923 | Box 64 \ 1 scan0138 | |
| The motor's main series winding, resistance, and progress on the dynamo and starter motor for the 40/50 model. | 4th Jun 1923 | Box 64 \ 1 scan0139 | |
| Winding specifications for a starter motor in relation to a drawing. | 15th Jun 1923 | Box 64 \ 1 scan0140 | |
| Secret memo regarding calculations for an E.A.C. Starter Motor winding. | 17th Jun 1923 | Box 64 \ 1 scan0141 | |
| Calculations for an E.A.C. starter motor teazer winding. | 19th Jun 1923 | Box 64 \ 1 scan0142 | |
| Revised calculations for the E.A.C. Starter Motor. | 19th Jun 1923 | Box 64 \ 1 scan0143 | |
| Proposed experimental arrangements for main and teazer windings for a motor. | 19th Jun 1923 | Box 64 \ 1 scan0144 | |
| Calculations for the performance and electrical characteristics of an E.A.C. starter motor. | 19th Jun 1923 | Box 64 \ 1 scan0145 | |
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