| Description | Date | Identifier | |
| Letter from The British Piston Ring Co Ltd regarding the machining of short cylinder inserts from castings. | 23th Mar 1939 | Box 132 \ 5 scan0073 | |
| Letter from The British Piston Ring Co Ltd regarding an order for Short Cylinder Inserts, discussing price, delivery and inspection details. | 24th Mar 1939 | Box 132 \ 5 scan0074 | |
| Letter from The British Piston Ring Co. Ltd. seeking clarification on releasing machined parts. | 24th Mar 1939 | Box 132 \ 5 scan0075 | |
| Letter to The British Piston Ring Co. Ltd. regarding the delivery and inspection of machined inserts. | 28th Mar 1939 | Box 132 \ 5 scan0076 | |
| Request to The British Piston Ring Co. Ltd. for a drawing and subsequent production of engine inserts. | 29th Mar 1939 | Box 132 \ 5 scan0077 | |
| Letter from British Piston Ring Co Ltd regarding a drawing for a Short Cylinder Insert and an order for six inserts. | 30th Mar 1939 | Box 132 \ 5 scan0078 | |
| Article by Alex Taub discussing the causes and factors affecting cylinder bore wear in engines. | 1st Mar 1939 | Box 132 \ 5 scan0079 | |
| Article on hard-facing welding techniques and the use of body jointing compounds. | 1st Mar 1939 | Box 132 \ 5 scan0080 | |
| Article discussing cylinder bore wear and an analysis of new steel piston ring designs. | 1st Mar 1939 | Box 132 \ 5 scan0081 | |
| Page from 'The Automobile Engineer' journal discussing cylinder bore wear, thermostats, and piston ring specifications. | 1st Mar 1939 | Box 132 \ 5 scan0082 | |
| Letter to The British Piston Ring Co. Ltd. requesting an earlier delivery of inserts for testing purposes. | 3rd Apr 1939 | Box 132 \ 5 scan0083 | |
| Letter from The British Piston Ring Co Ltd regarding the delivery of Short Cylinder Inserts. | 4th Apr 1939 | Box 132 \ 5 scan0084 | |
| Letter from The British Piston Ring Co Ltd regarding prices and specifications for short cylinder inserts. | 13th Apr 1939 | Box 132 \ 5 scan0085 | |
| Requesting an order to be sent to The British Piston Ring Co. Ltd. for short inserts. | 17th Apr 1939 | Box 132 \ 5 scan0086 | |
| Cylinder bore wear and the allocation of liners and pistons for engines. | 18th Apr 1939 | Box 132 \ 5 scan0087 | |
| Letter from The British Piston Ring Co Ltd regarding short cylinder inserts for an engine. | 20th Apr 1939 | Box 132 \ 5 scan0088 | |
| Requesting cost information on chassis servicing and alternatives related to cylinder bore wear. | 28th Apr 1939 | Box 132 \ 5 scan0089 | |
| Monthly report for May on cylinder bore wear experiments, detailing allocations of special engine blocks and inserts. | 31th May 1939 | Box 132 \ 5 scan0090 | |
| Summary of engine component specifications and updates on material experiments. | 31th May 1939 | Box 132 \ 5 scan0091 | |
| Friction and bore wear tests, including customer car data and future programme details. | 3rd May 1939 | Box 132 \ 5 scan0092 | |
| Cost-benefit analysis of adapting full-length dry liners to the EW.1923 cylinder block. | 3rd May 1939 | Box 132 \ 5 scan0093 | |
| Request to examine cars with raised crown pistons for cylinder bore wear. | 2nd May 1939 | Box 132 \ 5 scan0094 | |
| Visit to Leyland Motors to research cylinder bore wear and the use of dry liners. | 3rd Mar 1939 | Box 132 \ 5 scan0095 | |
| Engine liner wear rates, referencing Leyland's experience and comparing oil vs petrol engines. | 3rd May 1939 | Box 132 \ 5 scan0096 | |
| Servicing costs and financial implications of cylinder bore wear and re-boring. | 3rd May 1939 | Box 132 \ 5 scan0097 | |
| Report analyzing the costs associated with cylinder wear and maintenance intervals on Bentley cars. | 3rd May 1939 | Box 132 \ 5 scan0098 | |
| Requesting the production of six cylinder liner castings as the previous ones were lost. | 7th Jun 1939 | Box 132 \ 5 scan0099 | |
| Letter to The British Piston Ring Co. Ltd. regarding the machining of castings for cylinder liners. | 21th Jun 1939 | Box 132 \ 5 scan0100 | |
| Revising an order for castings and specifying new machining instructions for The British Piston Ring Co. | 21th Jun 1939 | Box 132 \ 5 scan0101 | |
| Request to obtain 20 castings for cylinder liners and despatch them to The British Piston Ring Co. Ltd. for machining. | 24th Jun 1939 | Box 132 \ 5 scan0102 | |
| Specification sheet for different types of cylinder materials and their chemical compositions. | 1st Jul 1939 | Box 132 \ 5 scan0103 | |
| List and analysis of various cast iron alloys for engine components. | 1st Jul 1939 | Box 132 \ 5 scan0104 | |
| Cost comparison for foundry production of Wraith cylinder blocks and short inserts using different materials. | 1st Jul 1939 | Box 132 \ 5 scan0105 | |
| Cost analysis comparing three different methods for treating excessive cylinder bore wear. | 1st Jul 1939 | Box 132 \ 5 scan0106 | |
| Cost analysis table for various cylinder treatment methods and components. | 12th Jul 1939 | Box 132 \ 5 scan0107 | |
| Letter to British Piston Ring Co. Ltd. regarding the despatch of 20 castings to be machined into finished liners. | 12th Jul 1939 | Box 132 \ 5 scan0108 | |
| Cylinder bore wear, contradicting a paper by 'Alex' and considering publishing alternative findings in the USA. | 8th Mar 1940 | Box 132 \ 5 scan0109 | |
| Request to The British Piston Ring Co. Ltd. for a drawing and 12 Hicrome inserts for a 75mm bore. | 12th Mar 1940 | Box 132 \ 5 scan0110 | |
| Internal request to place an order with The British Piston Ring Co. for 12 Hicrome Inserts. | 13th Mar 1940 | Box 132 \ 5 scan0111 | |
| Request for reports and data on oil consumption, piston performance, and cylinder bore wear under various test conditions. | 14th Mar 1940 | Box 132 \ 5 scan0112 | |
| List of requests for data related to engine oil consumption and cylinder bore wear. | 14th Mar 1940 | Box 132 \ 5 scan0113 | |
| Letter from The British Piston Ring Co Ltd regarding the supply of 12 cylinder inserts. | 14th Mar 1940 | Box 132 \ 5 scan0114 | |
| Engine bore wear, re-boring mileage, and the potential use of chrome plate inserts. | 16th Mar 1940 | Box 132 \ 5 scan0115 | |
| Follow-up letter regarding a pre-war test on thin oils to reduce cylinder bore wear in Bentleys. | 18th Mar 1940 | Box 132 \ 5 scan0116 | |
| Cylinder bore wear on various experimental cars requiring measurement. | 19th Mar 1940 | Box 132 \ 5 scan0117 | |
| List of engine types with specific components and a note requesting cars be brought in for decarbonising. | 19th Mar 1940 | Box 132 \ 5 scan0118 | |
| Letter regarding the compilation of a summary of information on cylinder bore durability for the Institute of Auto. Engineers. | 11th Apr 1940 | Box 132 \ 5 scan0119 | |
| Paper on Cylinder Bore Wear by Alex Taub, published by The Institution of Mechanical Engineers. | 3rd Feb 1939 | Box 132 \ 5 scan0120 | |
| Paper titled 'Cylinder Bore Wear' by Alex Taub, including communications on the subject. | 1st Jan 1937 | Box 132 \ 5 scan0121 | |
| Detailed analysis of cylinder bore wear, comparing British and American engine design practices and theories. | 1st Jan 1937 | Box 132 \ 5 scan0122 | |
| Collection of communications and analysis regarding the factors that influence cylinder bore wear, including materials, lubrication, and carburation. | 1st Jan 1937 | Box 132 \ 5 scan0123 | |
| The causes of cylinder bore wear, including wall temperature, piston temperature, and spark timing, with related communications. | 1st Jan 1937 | Box 132 \ 5 scan0124 | |
| The causes and prevention of cylinder bore wear, including piston rings, materials, and fuel effects. | 1st Jan 1937 | Box 132 \ 5 scan0125 | |
| Cylinder bore wear, focusing on the effects of mixture ratios, carburettor development, and operating temperatures. | 1st Jan 1939 | Box 132 \ 5 scan0126 | |
| Cylinder bore wear, its causes, and related experiments. | 1st Jan 1939 | Box 132 \ 5 scan0127 | |
| Technical page discussing cylinder bore wear, focusing on blow-by measurement, thermostats, and crankcase ventilation. | 1st Jan 1939 | Box 132 \ 5 scan0128 | |
| Detailed analysis of cylinder bore wear, piston ring design, and the prevention of blow-by, including a discussion section. | 3rd Feb 1939 | Box 132 \ 5 scan0129 | |
| Cylinder bore wear, including analysis of piston ring performance and oil consumption. | 3rd Feb 1939 | Box 132 \ 5 scan0130 | |
| Cylinder bore wear, piston materials, and comparative data on piston ring designs. | 3rd Feb 1939 | Box 132 \ 5 scan0131 | |
| Study on cylinder bore wear, piston ring practice, blow-by, and the use of thermostats in engines. | 3rd Feb 1939 | Box 132 \ 5 scan0132 | |
| Analysis of cylinder bore wear, oil consumption, and piston ring performance during engine running-in, with comparative data on blow-by over time. | 25th Apr 1940 | Box 132 \ 5 scan0133 | |
| Notes from a visit to Cadillac regarding their use of shutters, radiator caps and cores, and Morse chains. | 25th Apr 1940 | Box 132 \ 5 scan0134 | |
| Comparing engine component materials and balancing methods used by Cadillac, Pontiac, and Buick. | 25th Apr 1940 | Box 132 \ 5 scan0135 | |
| Technical memorandum discussing engine bore wear, comparing standard, porous, and nickel chrome iron bores. | 25th Apr 1940 | Box 132 \ 5 scan0136 | |
| Engine component design, materials, and wear issues, referencing Cadillac and Ford. | 25th Apr 1940 | Box 132 \ 5 scan0137 | |
| Proposed Cadillac and Buick bearings and Cadillac ignition systems. | 25th Apr 1940 | Box 132 \ 5 scan0138 | |
| Improvements in A.C. spark plug materials and performance, with notes on competitors like Cadillac and Chevrolet. | 25th Apr 1940 | Box 132 \ 5 scan0139 | |
| Follow-up memorandum regarding a check on cylinder bore wear for cars in London service. | 16th May 1940 | Box 132 \ 5 scan0140 | |
| Cylinder bore wear readings for chassis B.86-LS and questioning the need for future records. | 6th Jun 1940 | Box 132 \ 5 scan0141 | |
| Wear measurements in engine bores and pistons for a specific vehicle. | 4th Jun 1940 | Box 132 \ 5 scan0142 | |
| Supply, manufacturing methods, and revised steel specifications for Merlin cylinder liners. | 25th Jun 1940 | Box 132 \ 5 scan0143 | |
| Material specifications including ultimate tensile strength, elongation, and bend test requirements for a treated liner. | 23th Aug 1940 | Box 132 \ 5 scan0144 | |
| Letter from The British Thermostat Co., Ltd. regarding a car's mileage and a proposed experiment on a cylinder block. | 23th Aug 1940 | Box 132 \ 5 scan0145 | |
| The concluding page of a letter discussing parts availability and stock. | 23th Aug 1940 | Box 132 \ 5 scan0146 | |
| Cylinder bore wear on chassis B.181-EJ and the company's response. | 23th Aug 1940 | Box 132 \ 5 scan0147 | |
| Conclusion to a discussion about ceasing car modifications for the duration. | 9th Sep 1940 | Box 132 \ 5 scan0148 | |
| Rationalised engine specifications, cylinder wear, test bed progress, and cylinder heads. | 9th Sep 1940 | Box 132 \ 5 scan0149 | |
| Referencing an examination and micro photographs of cylinders. | 11th Oct 1940 | Box 132 \ 5 scan0150 | |
| Difficulties in photographing and preparing worn cylinder block specimens for analysis. | 17th Oct 1940 | Box 132 \ 5 scan0151 | |
| Photomicrograph showing various particles, fibres, and debris. | 11th Jan 1941 | Box 132 \ 5 scan0152 | |
| Request for cylinder bore wear figures on specific cars with special nickel chrome molybdenum blocks. | 11th Jan 1941 | Box 132 \ 5 scan0153 | |
| Confirmation memo for files borrowed from the Strong Room at Derby, related to cylinder wear. | 11th Mar 1941 | Box 132 \ 5 scan0154 | |
| Keeping charts for cylinder bore wear figures, and oil and petrol consumptions. | 24th Mar 1941 | Box 132 \ 5 scan0155 | |
| Cover memo for returning files, concerning cylinder line wear, to the Strong Room. | 27th Mar 1941 | Box 132 \ 5 scan0156 | |
| Data and information on cylinder bore wear from various vehicles. | 30th Apr 1941 | Box 132 \ 5 scan0157 | |
| Monitoring cylinder bore wear and oil consumption on experimental cars. | 30th May 1941 | Box 132 \ 5 scan0158 | |
| Experimental department running data logging cylinder wear measurements. | 30th May 1941 | Box 132 \ 5 scan0159 | |
| Particulars of a cylinder block fitted to a Wraith III, including specifications, wear records, and mileage. | 2nd Jun 1941 | Box 132 \ 5 scan0160 | |
| Mileage and performance record for a Wraith III with a chromium-plated cylinder block. | 27th May 1941 | Box 132 \ 5 scan0161 | |
| Outlining proposed tests on a Bentley lorry and other vehicles, focusing on bore wear, carburettors, and ignition. | 8th Jul 1941 | Box 132 \ 5 scan0162 | |
| Cylinder bore wear and the effectiveness of flash plating. | 16th Dec 1943 | Box 132 \ 5 scan0163 | |
| Rate of cylinder wear on small bore engines and comparing various models. | 3rd Feb 1944 | Box 132 \ 5 scan0164 | |
| Analysis of engine big end failure, cylinder lubrication, and the effect of bearing clearances. | 3rd Feb 1944 | Box 132 \ 5 scan0165 | |
| Cylinder wear issues related to Aerolite pistons and lubrication, with a conclusion and suggestions for improvement. | 8th Feb 1944 | Box 132 \ 5 scan0166 | |
| Typed memo discussing the rate of cylinder bore wear and test plans for 3' bore engines. | 8th Feb 1944 | Box 132 \ 5 scan0167 | |
| Letter from Norton Motors following up on a conversation regarding silencer tests for the Rolls-Bentley. | 9th Jan 1936 | Box 133 \ 1 scan0001 | |
| Letter to Norton Motors Ltd. delaying co-operation on silencing problems due to internal reorganisation. | 17th Jan 1936 | Box 133 \ 1 scan0002 | |
| Letter from Norton Motors Ltd. acknowledging receipt of a communication. | 20th Jan 1936 | Box 133 \ 1 scan0003 | |
| Modification for a common oil feed connection on a single-cylinder O.H.C. unit. | 27th Feb 1936 | Box 133 \ 1 scan0004 | |
| Letter to Rudge-Whitworth Ltd. inquiring about the availability of specific cylinder heads for purchase. | 12th Mar 1936 | Box 133 \ 1 scan0005 | |
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