| Description | Date | Identifier | |
| Letter to A. F. Sidgreaves discussing delays on an experimental chassis and body due to labour shortages and war conditions. | 7th Oct 1941 | Box 144 \ 2 scan0130 | |
| Letter to A.F. Sidgreaves Esq. discussing turnover, work charges, and issues with the Myth chassis frame. | 7th Oct 1941 | Box 144 \ 2 scan0131 | |
| Letter detailing manufacturing challenges and progress on the Myth Chassis Frame and Body, including repairs, material permits, and drawing issues. | 7th Oct 1941 | Box 144 \ 2 scan0132 | |
| To A. F. Sidgreaves Esq. discussing Bentley repairs, Senior Range drawings, Bentley V bodies, and B.V. jigs and tools. | 7th Oct 1941 | Box 144 \ 2 scan0133 | |
| Report to A.F. Sidgreaves Esq. concerning the status of jigs, tools, and project work for the B.V. Coupe and Myth. | 7th Oct 1941 | Box 144 \ 2 scan0134 | |
| Report to A. F. Sidgreaves Esq. concerning wood models, post-war projects, and a recent works visit by Mr. Hives. | 7th Oct 1941 | Box 144 \ 2 scan0135 | |
| Letter from C.W. Ward of Park Ward & Co Limited to A. F. Sidgreaves regarding the difficulties of motor car work during wartime. | 7th Oct 1941 | Box 144 \ 2 scan0136 | |
| New Austin models in relation to the 'Myth' and a 3-cylinder engine project. | 14th Oct 1941 | Box 144 \ 2 scan0137 | |
| 3-cylinder engine design in relation to an article in 'Autocar' and the 4-cylinder Myth engine. | 21th Oct 1941 | Box 144 \ 2 scan0138 | |
| Publicity request from 'MOTOR SPORT' magazine for the Bentley, enclosing reminiscences on Continental Testing. | 3rd Nov 1941 | Box 144 \ 2 scan0139 | |
| Invitation for lunch with the Chairman and Directors. | 27th Nov 1941 | Box 144 \ 2 scan0140 | |
| The screening of a film from the Crewe press view at the Gaumont Cinema in Derby. | 2nd Mar 1942 | Box 144 \ 2 scan0141 | |
| Changes to the company's transport fleet due to petrol and tyre restrictions. | 9th Apr 1942 | Box 144 \ 2 scan0142 | |
| Management of transport and experimental cars, including fuel economy and testing during wartime. | 4th May 1942 | Box 144 \ 2 scan0143 | |
| Invitation to a luncheon with the Directors at the Works Luncheon Room. | 29th Aug 1942 | Box 144 \ 2 scan0144 | |
| Short memo forwarding a letter from Rm/EAG and promising a doctor's report. | 6th Sep 1942 | Box 144 \ 2 scan0145 | |
| Typed personal letter providing a health update regarding a pierced lung and Deep Ray treatment. | 1st Sep 1942 | Box 144 \ 2 scan0146 | |
| The investigation and repair of a petrol leak and other works on Trials Car Chassis B.20.AW. | 16th Sep 1942 | Box 144 \ 2 scan0147 | |
| Dismantling a brake servo to fix a groaning noise and fitting new parts. | 16th Sep 1942 | Box 144 \ 2 scan0148 | |
| Progress report from the Chassis Division detailing mileage and failures on senior rationalised chassis and engine parts. | 24th Nov 1942 | Box 144 \ 2 scan0149 | |
| Log of vehicle faults and repairs at specific mileage intervals for two different chassis. | 24th Nov 1942 | Box 144 \ 2 scan0150 | |
| Technical report detailing vehicle faults at various mileages, focusing on steering, gearbox, suspension, and brakes. | 24th Nov 1942 | Box 144 \ 2 scan0151 | |
| Technical report on troubleshooting and improvements for various vehicle components including brakes, clutch, and transmission. | 24th Nov 1942 | Box 144 \ 2 scan0152 | |
| Vehicle component testing including rear axles, petrol consumption, and cylinder bore wear. | 24th Nov 1942 | Box 144 \ 2 scan0153 | |
| Major troubles experienced with E.V. and B.60 car bodies. | 24th Nov 1942 | Box 144 \ 2 scan0154 | |
| Performance and mileage of Post War Rationalised Chassis test cars. | 24th Nov 1942 | Box 144 \ 2 scan0155 | |
| Mark VI tank project, transmission design, and collaboration with Nuffield Mechanisation. | 22th Nov 1940 | Box 144 \ 2 scan0156 | |
| Staff appointment notice for the Aero Service Department. | 1st Oct 1940 | Box 144 \ 2 scan0157 | |
| Announcing the appointment of Mr. C.M. Toon as chief of the Jig and Tool Drawing Office and Operation Planning Dept. | 15th Aug 1940 | Box 144 \ 2 scan0158 | |
| Notice to officials, superintendents, and foremen regarding a temporary works closure. | 6th Aug 1940 | Box 144 \ 2 scan0159 | |
| Internal memorandum announcing the appointments of a Chief and Deputy Chief Superintendent of Repairs. | 31th Jul 1940 | Box 144 \ 2 scan0160 | |
| Announcement regarding the appointment of a new Chief Superintendent and the reclassification of departments. | 29th Jul 1940 | Box 144 \ 2 scan0161 | |
| On the Clan Foundry's capabilities for aero engine programmes, highlighting equipment shortages for handling Vulture engines. | 7th Jun 1941 | Box 144 \ 2 scan0162 | |
| Note on an oil consumption test for vehicle 1200, conducted by Mr. Royce, comparing different oil brands. | 5th Apr 1910 | Box 144 \ 3 scan0001 | |
| Oil consumption and engine performance for chassis 1419. | 3rd Oct 1910 | Box 144 \ 3 scan0002 | |
| Engine test notes on oil and petrol consumption at different oil pressures. | 3rd Oct 1910 | Box 144 \ 3 scan0003 | |
| Oil consumption during road tests for car models 741 and 736. | 2nd Jan 1911 | Box 144 \ 3 scan0004 | |
| Note detailing the results of oil consumption tests on chassis 1481 and 1491. | 2nd Jan 1911 | Box 144 \ 3 scan0005 | |
| Record of oil consumption for 1907 'box' 60544 on a 50-mile run. | 20th Sep 1910 | Box 144 \ 3 scan0006 | |
| Departmental memo regarding an investigation into engine oil consumption and its relationship to oil quality. | 20th Sep 1910 | Box 144 \ 3 scan0007 | |
| Request for the quantity of lubricating oil and grease required for 5,000 miles of running. | 3rd Feb 1914 | Box 144 \ 3 scan0008 | |
| Best oils to recommend for cars in New York. | 22th Jun 1914 | Box 144 \ 3 scan0009 | |
| Chassis weight and oil consumption for the 20 HP model. | 16th Mar 1923 | Box 144 \ 3 scan0010 | |
| Request for data on the oil consumption of a standard car engine at full load. | 24th Nov 1914 | Box 144 \ 3 scan0011 | |
| The lubricating oil consumption for a standard engine, with a note on a forthcoming test on a Mercedes engine. | 26th Nov 1914 | Box 144 \ 3 scan0012 | |
| Testing procedures for lubricating oil consumption in a standard engine. | 1st Dec 1914 | Box 144 \ 3 scan0013 | |
| Reduction in engine oil consumption after fitting Zephyr pistons. | 10th Dec 1914 | Box 144 \ 3 scan0014 | |
| Ongoing oil consumption testing of Zephyr pistons. | 12th Dec 1914 | Box 144 \ 3 scan0015 | |
| Cold weather testing for carburation, induction heating and the effects of oil viscosity. | 8th Nov 1925 | Box 144 \ 3 scan0016 | |
| Query regarding the possibility of removing felt glands from car engine valves to adopt double valve springs. | 1st Apr 1927 | Box 144 \ 3 scan0017 | |
| Oil consumption tests conducted on felt glands for Phantom engine valves. | 23th Apr 1927 | Box 144 \ 3 scan0018 | |
| Oil consumption experiment on a Phantom engine comparing upward sloping drain holes to standard ones. | 9th May 1927 | Box 144 \ 3 scan0019 | |
| Effectiveness of felt glands on valves and proposing alternatives to reduce oil consumption. | 30th Apr 1927 | Box 144 \ 3 scan0020 | |
| High oil consumption due to a crankshaft leak, proposing to revert to a previous, more reliable oil retaining design. | 5th Jan 1929 | Box 144 \ 3 scan0021 | |
| Issues with brakes and engine modifications for the 25 HP Japan model. | 21th Sep 1930 | Box 144 \ 3 scan0022 | |
| Responding to a query about a temporary brake failure and extra oil in the crankcase of a 25 HP car for Japan. | 8th Sep 1930 | Box 144 \ 3 scan0023 | |
| 'Heat to Oil' tests carried out on a Phantom II, No. 7 engine. | 21th Apr 1933 | Box 144 \ 3 scan0024 | |
| Data table showing oil temperature, pump delivery, and heat transfer test results at various RPMs. | 13th Feb 1934 | Box 144 \ 3 scan0025 | |
| Bentley heat balance experiments, detailing the test unit's specifications and the methodology for determining heat distribution. | 13th Feb 1934 | Box 144 \ 3 scan0026 | |
| Heat distribution analysis in an engine, including heat to oil, cooling water, and frictional losses. | 13th Feb 1934 | Box 144 \ 3 scan0027 | |
| Analysis of piston friction, heat loss, and mechanical efficiency at various engine speeds, comparing standard and Aerolite pistons. | 13th Feb 1934 | Box 144 \ 3 scan0028 | |
| Analysis of engine heat flow, piston friction, and performance improvements from component changes. | 13th Feb 1934 | Box 144 \ 3 scan0029 | |
| Engine power output variations caused by piston skirt dimensions, with plans for further piston friction reduction tests. | 13th Feb 1934 | Box 144 \ 3 scan0030 | |
| Performance comparison graph between Aerolite and E.B. 1299 pistons. | 2nd Mar 1934 | Box 144 \ 3 scan0031 | |
| Graph comparing the mechanical efficiency of Aerolite & E.B. 1299 pistons against R.P.M. | 26th Feb 1934 | Box 144 \ 3 scan0032 | |
| Comparative test of oil consumption using Wakefield's CW and Motorine C oils on chassis 3-B-IV. | 22th Feb 1935 | Box 144 \ 3 scan0033 | |
| Inquiry into complaints of excessive oil consumption on Bentley vehicles, questioning if it is linked to the fitting of Aerolite pistons. | 22th Feb 1936 | Box 144 \ 3 scan0034 | |
| Report analysing quarterly oil consumption returns from 1934 to 1936, investigating causes for increased usage. | 24th Feb 1936 | Box 144 \ 3 scan0035 | |
| Car oil consumption issues and performance comparisons between different quarters and models. | 24th Feb 1936 | Box 144 \ 3 scan0036 | |
| Investigations into complaints of excessive oil consumption on several Bentley chassis. | 24th Feb 1936 | Box 144 \ 3 scan0037 | |
| Engine issues, mileage, and repairs for four different car chassis. | 24th Feb 1936 | Box 144 \ 3 scan0038 | |
| Responding to a customer complaint about heavy oil consumption for chassis B.II8.BL. | 21th Feb 1936 | Box 144 \ 3 scan0039 | |
| Potential causes and solutions for excessive engine oil consumption. | 21th Feb 1936 | Box 144 \ 3 scan0040 | |
| Causes and investigation of high oil consumption on Bentley vehicles. | 11th Mar 1936 | Box 144 \ 3 scan0041 | |
| Measurement of lip wear at the top of the bore for Bentley 7 cylinders after 57,000 miles running. | 9th Feb 1938 | Box 144 \ 3 scan0042 | |
| Cylinder bore dimension measurements for a Bentley '7' Unit after 57,000 miles of running. | 4th Dec 1935 | Box 144 \ 3 scan0043 | |
| Oil consumption issues and resolutions on a Bentley vehicle. | 23th Mar 1936 | Box 144 \ 3 scan0044 | |
| Explanatory note on interpreting measurements listed in a 'Remarks' column. | 13th Mar 1936 | Box 144 \ 3 scan0045 | |
| The wear measurements for engine bores and pistons for chassis B 60 FB. | 13th Mar 1936 | Box 144 \ 3 scan0046 | |
| Log sheet detailing cylinder wear measurements for various chassis in February 1936. | 1st Feb 1936 | Box 144 \ 3 scan0047 | |
| Oil consumption on Bentley cars, related to the bedding-in period of new piston rings. | 27th Mar 1936 | Box 144 \ 3 scan0048 | |
| Log of daily oil consumption figures, in miles per gallon, for a Bentley (B-56-BN) and a 25 HP (22-G-V) vehicle. | 24th Mar 1936 | Box 144 \ 3 scan0049 | |
| Internal memorandum discussing high oil consumption complaints on Bentley models. | 5th Jun 1936 | Box 144 \ 3 scan0050 | |
| Log sheet detailing oil consumption, mileage, and total mileage recorded on specific dates. | 5th Jun 1936 | Box 144 \ 3 scan0051 | |
| High oil consumption issues, piston ring performance, and the need for re-boring cylinders. | 5th Jun 1936 | Box 144 \ 3 scan0052 | |
| Page discussing the investigation of a bad case and a report on rings for depots. | 5th Jun 1936 | Box 144 \ 3 scan0053 | |
| Excessive oil consumption in various car models, with a suggestion to order new scraper rings. | 5th Jun 1936 | Box 144 \ 3 scan0054 | |
| Investigation into high oil consumption on a 20/25 HP model. | 8th Jun 1936 | Box 144 \ 3 scan0055 | |
| Heavy oil consumption on the 20/25 HP model during testing. | 22th Jun 1936 | Box 144 \ 3 scan0056 | |
| Oil and petrol consumption test results for a GAE-20 engine unit over a 195-mile run. | 22th Jun 1936 | Box 144 \ 3 scan0057 | |
| Comparison of piston ring details and oil consumption between Chevrolet and Bentley engines. | 23th Jun 1936 | Box 144 \ 3 scan0058 | |
| Specification sheet comparing different types of piston rings. | 23th Jun 1936 | Box 144 \ 3 scan0059 | |
| Comparison of specifications for Stepped and Plain type compression rings. | 23th Jun 1936 | Box 144 \ 3 scan0060 | |
| Comparison of piston ring properties, manufacturing methods, and performance. | 23th Jun 1936 | Box 144 \ 3 scan0061 | |
| Comparison of different engine oils' consumption and viscosity, with notes on upcoming piston ring tests. | 23th Jun 1936 | Box 144 \ 3 scan0062 | |
| Specifications, tests, and material analysis for Chevrolet rings. | 25th Jun 1936 | Box 144 \ 3 scan0063 | |
| Brief report on oil and petrol consumption figures from a 2,500-mile test. | 25th Jun 1936 | Box 144 \ 3 scan0064 | |
| The oil and petrol consumption for a C.16 Unit Standard Engine test run. | 29th Jun 1936 | Box 144 \ 3 scan0065 | |
| Repeat oil consumption test run for a 21-G-IV C-16 Unit Standard Engine. | 30th Jun 1936 | Box 144 \ 3 scan0066 | |
| Test report on oil and petrol consumption for unit C-16 during a road test to Oxford and back. | 3rd Jul 1936 | Box 144 \ 3 scan0067 | |
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