| Description | Date | Identifier | |
| Methods for reducing engine weight, including the potential use of aluminum for specific parts. | 10th Jun 1912 | Box 3 \ 3 03-page063 | |
| Material choices and manufacturing processes for engine components like cylinder covers and connecting rods. | 10th Jun 1912 | Box 3 \ 3 03-page064 | |
| Analysis of engine materials and weight reduction strategies for the crankcase. | 10th Jun 1912 | Box 3 \ 3 03-page065 | |
| Memo discussing various methods for reducing engine weight. | 10th Jun 1912 | Box 3 \ 3 03-page066 | |
| Instruction regarding the reduction of weight for a competition engine. | 11th Jun 1912 | Box 3 \ 3 03-page067 | |
| Specification sheet comparing the weight and capacity of four different radiators. | 11th Oct 1910 | Box 3 \ 3 03-page068 | |
| Comparison of weights and capacities for four different types of radiators. | 11th Aug 1912 | Box 3 \ 3 03-page069 | |
| Instruction note on reducing car weight and the increased weight of series 2100 cars due to inverted springs. | 6th Dec 1911 | Box 3 \ 3 03-page070 | |
| Instruction memo advising against further weight reduction on rear axle and torque tubes due to strength concerns. | 18th Jun 1911 | Box 3 \ 3 03-page071 | |
| Departmental memo regarding reports on the reduction of chassis weight. | 18th Jun 1912 | Box 3 \ 3 03-page072 | |
| Letter returning reports on the reduction of chassis weight with Mr Royce's remarks thereon. | 26th Jun 1912 | Box 3 \ 3 03-page073 | |
| Blueprint cross-section of a mechanical housing or crankcase. | 1st Aug 1922 | Box 3 \ 3 03-page074 | |
| Reduction of engine weight by substituting parts with aluminium. | 1st Aug 1922 | Box 3 \ 3 03-page075 | |
| The design, materials, and manufacturing for engine components like cylinder covers and connecting rods. | 1st Jan 1922 | Box 3 \ 3 03-page076 | |
| Technical memo discussing engine weight reduction strategies, including piston materials and crankcase modifications. | 1st Jan 1922 | Box 3 \ 3 03-page077 | |
| By A.A. Elliott discussing weight reduction opportunities on engine components like the crankcase and silencer outlet. | 20th Jun 1908 | Box 3 \ 3 03-page078 | |
| Listing items for consideration to lighten the chassis for weight reduction. | 20th Jun 1908 | Box 3 \ 3 03-page079 | |
| From the F. Department detailing proposals for reducing vehicle weight by modifying stampings and frame tubes. | 24th Nov 1923 | Box 3 \ 3 03-page080 | |
| Potential weight reduction opportunities on various vehicle components. | 30th Mar 1912 | Box 3 \ 3 03-page081 | |
| Page two of a document signed by R.W.H. Bailey concerning the inability to make gains in weight reduction. | 5th Jul 1912 | Box 3 \ 3 03-page082 | |
| Reduction of chassis weight based on a report from Mr. Bailey. | 5th Jul 1912 | Box 3 \ 3 03-page083 | |
| Suggestions for the reduction of chassis weight. | 5th Jul 1912 | Box 3 \ 3 03-page084 | |
| Reduction of chassis weight, including re-making dies and changing the gauge of cross frame tubes. | 6th Jul 1912 | Box 3 \ 3 03-page085 | |
| Parts to be lightened for the reduction of chassis weight. | 5th Jul 1912 | Box 3 \ 3 03-page086 | |
| Departmental memo from Mr. Royce approving a list of parts to be lightened for chassis weight reduction. | 5th Jul 1912 | Box 3 \ 3 03-page087 | |
| Mr. Royce's remarks on proposals for chassis weight reduction using aluminium parts. | 5th Jul 1912 | Box 3 \ 3 03-page088 | |
| List of proposals and decisions on the materials and design for various engine components. | 5th Jul 1912 | Box 3 \ 3 03-page089 | |
| Mr Royce's feedback on proposed engine component modifications. | 5th Jul 1912 | Box 3 \ 3 03-page090 | |
| Confirming Mr. Royce's agreement to requisition a draughtsman for engine weight analysis. | 5th Jul 1912 | Box 3 \ 3 03-page091 | |
| Mr Royce's agreement to reduce the weight of various chassis components. | 5th Jul 1912 | Box 3 \ 3 03-page092 | |
| Report of a torsional test on a 1916 rear spring for an Amilcar hill climber. | 26th Oct 1917 | Box 3 \ 3 03-page093 | |
| Specifications for chassis 1718, detailing weights, camber, height, and clearances. | 3rd Jul 1913 | Box 3 \ 3 03-page094 | |
| Weight measurements and ground clearances for chassis 1958. | 3rd Jul 1913 | Box 3 \ 3 03-page095 | |
| The weight of a 16.9 HP 6-cylinder Napier vehicle. | 3rd Jul 1913 | Box 3 \ 3 03-page096 | |
| Calculation of the weights of Palmer tyres, wire wheels, and other fittings. | 3rd Jul 1913 | Box 3 \ 3 03-page097 | |
| Document detailing the weight calculation of a chassis with specific components. | 3rd Jul 1913 | Box 3 \ 3 03-page098 | |
| Comparing the weights of detachable wheels from different manufacturers. | 3rd Jul 1913 | Box 3 \ 3 03-page099 | |
| The weights of a Rudge-Whitworth disc wheel and a wooden wheel. | 1st Jan 1907 | Box 3 \ 3 03-page100 | |
| Specifications and costs for a body, mudguards and footboards for a 1907 chassis. | 1st Jan 1907 | Box 3 \ 3 03-page101 | |
| Record of chassis and axle weights for taxation purposes. | 4th Aug 1916 | Box 3 \ 3 03-page102 | |
| Record of chassis and body weights, including with/without passengers and axle loads. | 4th Aug 1916 | Box 3 \ 3 03-page103 | |
| The comparative weights and running performance of different wheel and tyre combinations. | 15th Jun 1906 | Box 3 \ 3 03-page104 | |
| Calculation of the total weight of a chassis, its components, and bodywork. | 15th Jun 1906 | Box 3 \ 3 03-page105 | |
| Car weight calculations for total weight, body, and consumables, with a note on chassis weight using wire wheels. | 15th Jun 1906 | Box 3 \ 3 03-page106 | |
| The weights of Shell petrol tins. | 15th Jun 1906 | Box 3 \ 3 03-page107 | |
| The weights of various chassis and body combinations. | 10th Feb 1907 | Box 3 \ 3 03-page108 | |
| Log entry detailing chassis status, parts, and associated costs for several job numbers. | 10th Feb 1907 | Box 3 \ 3 03-page109 | |
| List of models with associated numbers, weights, and dates. | 21th Dec 1906 | Box 3 \ 3 03-page110 | |
| Body and chassis weight distribution tests. | 21th Dec 1906 | Box 3 \ 3 03-page111 | |
| The weights of a 1907 car with a Graham White body and other components. | 20th Dec 1918 | Box 3 \ 3 03-page112 | |
| Weigh ticket from the Derby Corporation Town Hall Weighing Machine for a delivery of coal. | 20th Dec 1918 | Box 3 \ 3 03-page113 | |
| Weigh ticket from Derby Corporation for the delivery of coal. | 28th Oct 1908 | Box 3 \ 3 03-page114 | |
| Instruction sheet detailing a lighter-than-standard corrugated radiator for a long chassis car. | 21th Oct 1907 | Box 3 \ 3 03-page115 | |
| The weights of long and short chassis. | 21th Oct 1907 | Box 3 \ 3 03-page116 | |
| The weight of a lightened flywheel and clutch assembly. | 21th Oct 1907 | Box 3 \ 3 03-page117 | |
| Detailed weight breakdown for a 1910 long chassis vehicle, including body, accessories, and tools. | 1st Jan 1913 | Box 3 \ 3 03-page118 | |
| Weight calculation breakdown for various accessories and passengers. | 1st Jan 1913 | Box 3 \ 3 03-page119 | |
| Instruction sheet form with fields for order and customer numbers, with a handwritten customer number. | 12th Dec 1912 | Box 3 \ 3 03-page120 | |
| Proposal for a new, smaller G.I. engine, comparing it to an Alfa Romeo and discussing component re-use from the Peregrine engine. | 1st Dec 1931 | Box 3 \ 4 04-page001 | |
| Drawing N.Sch.3838, which outlines the frame, springs, and transmission centre-line. | 21th Dec 1931 | Box 3 \ 4 04-page002 | |
| Drawing M.Sch.3393, which details the frame, springs, and transmission layout, comparing it to the 'Peregrine' model. | 21th Dec 1931 | Box 3 \ 4 04-page003 | |
| Comparative table of component specifications for various Bentley and Peregrine models. | 21th Dec 1931 | Box 3 \ 4 04-page004 | |
| Specification sheet comparing standard parts with those special to a Bentley model. | 21th Dec 1931 | Box 3 \ 4 04-page005 | |
| Specification sheet comparing common and special parts for different vehicle sections. | 28th Jan 1931 | Box 3 \ 4 04-page006 | |
| Specifications for a new 'B.2. Car', including body, luggage, and supercharger options. | 28th Jan 1931 | Box 3 \ 4 04-page007 | |
| Commercial viability and engineering direction for the B.2. car model. | 30th Dec 1931 | Box 3 \ 4 04-page008 | |
| Requesting attendance at a conference to discuss the B 2 Car and General Chassis Policy. | 30th Dec 1931 | Box 3 \ 4 04-page009 | |
| Notes of a conference at Derby discussing proposed new car models and market strategy. | 31th Dec 1931 | Box 3 \ 4 04-page010 | |
| Production status of the 20/25 HP model, its replacement, and modifications for a specific variant. | 16th Mar 1931 | Box 3 \ 4 04-page011 | |
| Specification table for various car models, detailing engine bore, stroke, capacity, and chassis dimensions. | 16th Mar 1931 | Box 3 \ 4 04-page012 | |
| Internal discussion on market competition and product strategy for developing new, cheaper 18 HP and Bentley models. | 16th Mar 1931 | Box 3 \ 4 04-page013 | |
| Review of the J-III model's position, questioning its manufacturing viability compared to the 20/25 HP car. | 1st Jan 1932 | Box 3 \ 4 04-page014 | |
| Strategic memo outlining the plan for the Bentley brand, focusing on market position and model selection. | 1st Jan 1932 | Box 3 \ 4 04-page015 | |
| Sales policy, competition from Bentley, and the feasibility of producing a J.I engine sports Bentley car. | 4th Jan 1938 | Box 3 \ 4 04-page016 | |
| Design and development updates for the B.2 car, covering the gearbox, bodywork, accommodation, and radiator. | 6th Jan 1932 | Box 3 \ 4 04-page017 | |
| Progress on the B.2 engine section, including the cylinder head and valve gear, and the need for temporary help. | 1st Jan 1932 | Box 3 \ 4 04-page018 | |
| Engine power improvements, specifically regarding valve lift, supercharging, and valve timing. | 9th Jan 1932 | Box 3 \ 4 04-page019 | |
| Development and strategy for sports car models, including the J.1 and a proposed 'Bensport' model. | 28th Jan 1932 | Box 3 \ 4 04-page020 | |
| Design revisions for the Bensport chassis layout, inspired by the Riley Monaco Saloon. | 1st Mar 1932 | Box 3 \ 4 04-page021 | |
| Comparing a 6-cylinder with an 8-cylinder 'Peregrine size' engine, with technical design notes. | 28th Mar 1932 | Box 3 \ 4 04-page022 | |
| Engine design options for the 'Bensport' model, comparing it to a Bugatti and considering supercharger placement. | 31th Mar 1932 | Box 3 \ 4 04-page023 | |
| Feasibility of an 8-cylinder engine for the 'Bensport' model, considering interchangeability with 'Peregrine' parts, tax, and market implications. | 24th Apr 1932 | Box 3 \ 4 04-page024 | |
| Feasibility of an 8-cylinder engine versus continuing with a 6-cylinder engine. | 27th Apr 1932 | Box 3 \ 4 04-page025 | |
| Design, market position, and pricing for a new sports car model in response to competitors. | 27th Apr 1932 | Box 3 \ 4 04-page026 | |
| Design, cost, and market positioning of the 'Bensport' car model. | 8th Apr 1932 | Box 3 \ 4 04-page027 | |
| Pros and cons of a push rod engine for the Bensport car compared to an overhead camshaft engine. | 8th Apr 1932 | Box 3 \ 4 04-page028 | |
| Desired visual differentiation of the Bensport Engine from standard engines. | 8th Apr 1932 | Box 3 \ 4 04-page029 | |
| Blowers and learnings from Alfa Romeo engines for the Bensport model. | 11th May 1932 | Box 3 \ 4 04-page030 | |
| Engine valve sizes and a comparison of Roots and Powerplus type blowers for the Bensport engine. | 14th May 1932 | Box 3 \ 4 04-page031 | |
| The efficiency and coupling of a Roots type blower compared to a Powerplus system. | 11th May 1932 | Box 3 \ 4 04-page032 | |
| Chassis layouts and design instructions for the BENSPORT project, referencing specific schematics and competitor details. | 10th Sep 1932 | Box 3 \ 4 04-page033 | |
| Road test report and specification sheet for an Alvis 'Speed' Twenty car. | 24th May 1932 | Box 3 \ 4 04-page034 | |
| Road test report commenting on the performance of the engine, steering, gearbox, and brakes. | 24th May 1932 | Box 3 \ 4 04-page035 | |
| The performance and characteristics of an Alvis car, comparing it to a proposed Bentley. | 19th May 1932 | Box 3 \ 4 04-page036 | |
| The 'Bensport' frame and transmission layout, with comparisons to the 'Peregrine' model. | 19th May 1932 | Box 3 \ 4 04-page037 | |
| Listing bought-out materials for the 'Bensport' and 'Peregrine' specifications. | 19th May 1932 | Box 3 \ 4 04-page038 | |
| Design considerations for the 'Bensport' car, focusing on the Peregrine engine and clutch type. | 28th May 1932 | Box 3 \ 4 04-page039 | |
| Design considerations for the clutch, gearbox, back axle, and brakes of a new model. | 28th May 1932 | Box 3 \ 4 04-page040 | |
| Technical memo discussing the 4-brake system, Peregrine engine, and cooling considerations for a new model. | 26th May 1932 | Box 3 \ 4 04-page041 | |
| Use of a common front axle for the Bensport and Peregrine cars to avoid making new dies. | 26th May 1932 | Box 3 \ 4 04-page042 | |
| | | | |
