| Description | Date | Identifier | |
| Weight specification sheet for car 49-GB, detailing front, rear, and total weights. | 15th Jun 1920 | Box 3 \ 2 02-page080 | |
| Table detailing the weight of a 4.EX car with and without passengers. | 7th Sep 1920 | Box 3 \ 2 02-page081 | |
| In-house designed components and the comparative weight of the 40/50 HP chassis. | 7th Sep 1920 | Box 3 \ 2 02-page082 | |
| Vehicle weight, component design choices, and comparisons with competitors like Packard. | 7th Sep 1920 | Box 3 \ 2 02-page083 | |
| Extract from a memorandum concerning the 3-speed gearbox and the increasing weight of complete cars. | 9th Sep 1920 | Box 3 \ 2 02-page084 | |
| Specifying the weight of Rapson tyres and tubes, both individually and when fitted to a Dunlop wire wheel. | 24th Sep 1920 | Box 3 \ 2 02-page085 | |
| Calculation of the weight for vehicle 4.EX with two passengers, detailing front, rear, and total weights. | 24th Sep 1920 | Box 3 \ 2 02-page086 | |
| Calculation of the total weight and distribution for a car with a Cabriolet body and a full load. | 30th Sep 1920 | Box 3 \ 2 02-page087 | |
| Weight specification sheet for a 'HAWK.IRET.CLIFFE' item, detailing front, rear, and total weights. | 19th Apr 1920 | Box 3 \ 2 02-page088 | |
| Dynamometer test results for a component with 4 exhaust carburetors. | 19th Apr 1920 | Box 3 \ 2 02-page089 | |
| Weight comparison between a Rapson tyre fitted to a Dunlop wheel and a Dunlop Magnum. | 16th Dec 1920 | Box 3 \ 2 02-page090 | |
| Providing the weights of American Budd Michelin and French Michelin wheels. | 21th Dec 1920 | Box 3 \ 2 02-page091 | |
| Test report on the Goshawk I vehicle's performance, covering brakes, cooling, suspension, and drivetrain. | 1st Jan 1921 | Box 3 \ 2 02-page092 | |
| Letter from Dunlop Rubber Co Ltd requesting figures for the sprung and unsprung weights of cars. | 30th May 1922 | Box 3 \ 2 02-page093 | |
| Letter to the Dunlop Rubber Co. Ltd. detailing the sprung and unsprung weights for a 40/50 HP car. | 30th Nov 1923 | Box 3 \ 2 02-page094 | |
| Letter from Dunlop Rubber Co Ltd acknowledging receipt of vehicle weight information for 40-50 HP cars. | 1st Jun 1922 | Box 3 \ 2 02-page095 | |
| Correcting previously issued weights for the Goshawk chassis and discussing performance implications. | 20th Nov 1922 | Box 3 \ 2 02-page096 | |
| Comparison of displacement per ton per mile between the Goshawk and 40/50 models. | 19th Dec 1922 | Box 3 \ 2 02-page097 | |
| The weight of a 40/50 engine from the Test Department. | 19th Dec 1922 | Box 3 \ 2 02-page098 | |
| Comparing the weights of post-war and pre-war 40/50 chassis. | 14th Jan 1923 | Box 3 \ 2 02-page099 | |
| Comparing the weights and braking performance of two 40/50 HP cars and a Hispano Suiza. | 13th Nov 1923 | Box 3 \ 2 02-page100 | |
| Comparing the weights of EAC and 40/50 engine parts. | 1st Feb 1924 | Box 3 \ 2 02-page101 | |
| Weight comparison table for different engine component sections. | 1st Feb 1924 | Box 3 \ 2 02-page102 | |
| Weight comparison table of components between the E.A.C. Engine and the 40/50 Engine. | 1st Feb 1924 | Box 3 \ 2 02-page103 | |
| Weight comparison table for components of the E.A.C. Engine and the 40/50 Engine. | 11th Feb 1924 | Box 3 \ 2 02-page104 | |
| EAC engine weights, comparing the use of cast iron versus aluminium for the induction pipe and hot spot. | 11th Feb 1924 | Box 3 \ 2 02-page105 | |
| Weight comparison analysis between the EAC and 40/50 engines. | 18th Feb 1924 | Box 3 \ 2 02-page106 | |
| Weight comparison between a standard and an experimental stiffer exhaust snout. | 2nd Jun 1924 | Box 3 \ 2 02-page107 | |
| Specification table detailing weights and capacities for various radiator matrix sizes for the 40/50 model. | 17th Sep 1924 | Box 3 \ 2 02-page108 | |
| Cover letter for particulars of the weights of complete 50 HP open cars. | 17th Apr 1925 | Box 3 \ 2 02-page109 | |
| List of car models with their respective coachbuilders, spare wheel provisions, and detailed weight specifications. | 17th Apr 1925 | Box 3 \ 2 02-page110 | |
| Comparative table of weights for front axle components from the Silver Ghost, New Phantom, and Hispano models. | 17th Apr 1925 | Box 3 \ 2 02-page111 | |
| Table of comparative weights for front axle components on the Silver Ghost, New Phantom, and Hispano models. | 7th Sep 1925 | Box 3 \ 2 02-page112 | |
| Comparing the weights of front axle and brake components for T.series Silver Ghost, New Phantom, and Hispano models. | 7th Sep 1925 | Box 3 \ 2 02-page113 | |
| Comparing the weights of wheel and hub components across different models. | 17th Sep 1925 | Box 3 \ 2 02-page114 | |
| Instruction sheet detailing the weights of Dunlop Wire and Wellbase wheels and their components. | 20th Nov 1925 | Box 3 \ 2 02-page115 | |
| Telegram requesting a copy of a report on the weights of individual Phantom engine sections. | 20th Nov 1925 | Box 3 \ 2 02-page116 | |
| The weight of the S.167 MK (American chassis). | 12th Dec 1925 | Box 3 \ 2 02-page117 | |
| Plans to lighten the Phantom engine without a complete redesign. | 12th Dec 1925 | Box 3 \ 2 02-page118 | |
| Test notes on No 6 car, detailing suspension adjustments and wheel/tyre weights. | 4th Jun 1906 | Box 3 \ 3 03-page001 | |
| Weight specification for a 1908 type gearbox, chassis 712. | 22th Jan 1908 | Box 3 \ 3 03-page002 | |
| Weight test results for a long chassis open tourer with five passengers. | 24th Feb 1909 | Box 3 \ 3 03-page003 | |
| List detailing the weights of various chassis components from a test taken by Lowe. | 11th Jul 1907 | Box 3 \ 3 03-page004 | |
| Weigh ticket from the Derby Corporation Town Hall weighing machine for a motor front axle. | 31th Aug 1937 | Box 3 \ 3 03-page005 | |
| Weight breakdown of a 1910 type long chassis (No.1120). | 31th Aug 1909 | Box 3 \ 3 03-page006 | |
| Record of the weight measurements for Chassis 1200 fitted with Mr. Royce's body. | 1st Dec 1909 | Box 3 \ 3 03-page007 | |
| Comparison of weights between the present and old type cylinders. | 26th Feb 1910 | Box 3 \ 3 03-page008 | |
| And typed note detailing the weights of different wheel and rim sets. | 27th Apr 1910 | Box 3 \ 3 03-page009 | |
| Technical note comparing the weights and valve specifications of 1200 and 1400 type cylinders. | 7th May 1910 | Box 3 \ 3 03-page010 | |
| The weight of chassis 1353. | 12th Jul 1910 | Box 3 \ 3 03-page011 | |
| Specification sheet detailing the weights of the 1300 Type chassis components. | 14th Sep 1910 | Box 3 \ 3 03-page012 | |
| Weight specification sheet for the 1600 Type chassis. | 14th Sep 1910 | Box 3 \ 3 03-page013 | |
| List detailing the weights of three different silencer patterns and their drawing numbers. | 30th Nov 1910 | Box 3 \ 3 03-page014 | |
| Weight calculation note for a chassis, including fluids. | 21th Oct 1920 | Box 3 \ 3 03-page015 | |
| Weight analysis of the 1400 Type chassis, detailing component and total weights for different configurations. | 7th Oct 1910 | Box 3 \ 3 03-page016 | |
| Standard unit conversions for weight and volume. | 10th Mar 1911 | Box 3 \ 3 03-page017 | |
| The weights of Vinet and De-oin wheels. | 17th May 1911 | Box 3 \ 3 03-page018 | |
| Recording the weights of four top-half crankcases. | 5th Jul 1911 | Box 3 \ 3 03-page019 | |
| Specification note for a standard piston, detailing its features, part number and weight. | 21th Jul 1911 | Box 3 \ 3 03-page020 | |
| Record of piston weights for various engine types. | 13th Nov 1911 | Box 3 \ 3 03-page021 | |
| Test report for 'Engine C' with associated data and a note on cam settings. | 27th Jul 1911 | Box 3 \ 3 03-page022 | |
| Weight comparison list for parts of a 4x6 engine against standard parts. | 18th Oct 1911 | Box 3 \ 3 03-page023 | |
| Internal query about chassis weight comparisons from 1907 to 1911. | 6th Oct 1911 | Box 3 \ 3 03-page024 | |
| List of weights for various chassis, including reasons for the gradual increase in weight over time. | 9th Nov 1911 | Box 3 \ 3 03-page025 | |
| List of vehicle components with handwritten additions, including a larger crankshaft and heavier pistons. | 9th Nov 1911 | Box 3 \ 3 03-page026 | |
| Record sheet tracking the status and material for a C.A.V. Dynamo. | 31th Oct 1911 | Box 3 \ 3 03-page027 | |
| Calculation of the weight difference between a standard configuration and one with specific wheels and tyres. | 31th Oct 1911 | Box 3 \ 3 03-page028 | |
| Calculation of extra weight on chassis 1750 caused by using 'fleumatic' in tyres. | 31th Oct 1911 | Box 3 \ 3 03-page029 | |
| Expressing alarm over a significant weight increase in the 1700 series and requesting an investigation to lighten parts. | 10th Nov 1911 | Box 3 \ 3 03-page030 | |
| The weight of chassis 1701 with a speed body, and its camber and clearance measurements. | 17th Jul 1911 | Box 3 \ 3 03-page031 | |
| Particulars of springs and clearances used on a speed car for a speed trial. | 5th Nov 1912 | Box 3 \ 3 03-page032 | |
| The sprung and unsprung weight calculations for chassis 1800. | 25th Oct 1911 | Box 3 \ 3 03-page033 | |
| Weight calculation for an L. to E. type chassis. | 10th Jun 1912 | Box 3 \ 3 03-page034 | |
| The weights of two different types of clutches. | 22th Nov 1911 | Box 3 \ 3 03-page035 | |
| Meeting minutes discussing the increasing weight of the chassis and the potential for redesign. | 30th Nov 1911 | Box 3 \ 3 03-page036 | |
| Minutes of a meeting discussing methods and suggestions for reducing the weight of the chassis. | 8th Dec 1911 | Box 3 \ 3 03-page037 | |
| Meeting minutes concerning instructions given to the chief draughtsmen about the weight of the chassis. | 29th Dec 1911 | Box 3 \ 3 03-page038 | |
| Meeting minute concerning the increased weight of the chassis and potential opportunities for weight reduction. | 8th Dec 1911 | Box 3 \ 3 03-page039 | |
| Minutes from the 96th Technical Committee meeting regarding the reduction of chassis weight. | 11th Jan 1912 | Box 3 \ 3 03-page040 | |
| Meeting minute discussing the reduction of weight of the chassis. | 12th Jan 1912 | Box 3 \ 3 03-page041 | |
| Proposal by Mr. Royce to inspect all parts for weight and add weight limits to drawings. | 3rd Feb 1912 | Box 3 \ 3 03-page042 | |
| To the Technical Committee regarding the inspection of parts for weight and the inclusion of weight limits on all drawings. | 3rd Feb 1912 | Box 3 \ 3 03-page043 | |
| Outlining a new scheme to add rough and finished weight limits to drawings for castings and stampings. | 21th Feb 1912 | Box 3 \ 3 03-page044 | |
| The procedure for weighing parts and adding their weights to drawings. | 22th Mar 1914 | Box 3 \ 3 03-page045 | |
| Confirming a conversation and requesting a retrospective scheme for castings and stampings. | 26th Feb 1912 | Box 3 \ 3 03-page046 | |
| Instructions sheet detailing the urgent need to create drawings and report weight reductions for various lightened components. | 26th Feb 1912 | Box 3 \ 3 03-page047 | |
| The weights of three different axle configurations. | 28th Aug 1912 | Box 3 \ 3 03-page048 | |
| Cost breakdown sheet for a 'Standard Engine'. | 4th Oct 1912 | Box 3 \ 3 03-page049 | |
| Cost comparison table for Marine Engine components. | 3rd Apr 1912 | Box 3 \ 3 03-page050 | |
| Letter from F.H. Royce to the Technical Committee regarding the removal of unnecessary weight from the chassis. | 9th Apr 1912 | Box 3 \ 3 03-page051 | |
| List of items and instructions for lightening a chassis. | 1st Apr 1912 | Box 3 \ 3 03-page052 | |
| Departmental memo listing components under consideration for lightening a chassis. | 20th Apr 1912 | Box 3 \ 3 03-page053 | |
| Cover note forwarding a list detailing the analysis of piston weights. | 28th Apr 1913 | Box 3 \ 3 03-page054 | |
| Weight comparison of components for a Marine Engine and a Standard Engine. | 4th May 1912 | Box 3 \ 3 03-page055 | |
| Departmental memo regarding the failure to specify weight limits on drawings for part inspection, requesting that draughtsmen be instructed to do so. | 29th Apr 1912 | Box 3 \ 3 03-page056 | |
| Note comparing the weights of standard and special 9 inch frame sides. | 30th Apr 1912 | Box 3 \ 3 03-page058 | |
| Instruction sheet for work to be completed, with customer number X200. | 30th Apr 1912 | Box 3 \ 3 03-page059 | |
| With a table of figures for chassis 185'B'n, a Weymann body. | 7th Jun 1912 | Box 3 \ 3 03-page060 | |
| Departmental memo regarding chassis and tyre weights, including weight distribution and centre of gravity. | 7th Jun 1912 | Box 3 \ 3 03-page061 | |
| The weight distribution and fluid levels for car 1701. | 10th Jun 1912 | Box 3 \ 3 03-page062 | |
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