| Description | Date | Identifier | |
| Departmental memo from P. Northey to Barrington confirming a point already dealt with. | 25th Nov 1912 | Box 3 \ 1 01-page177 | |
| Departmental memo regarding the necessity of shock-absorbers with a new type of springing for the back axle. | 12th Feb 1913 | Box 3 \ 1 01-page178 | |
| Departmental memo regarding an experiment on a shock absorber and a new type of rear spring. | 13th Feb 1913 | Box 3 \ 1 01-page179 | |
| Improvements to road spring design, materials, and associated components. | 9th Jul 1913 | Box 3 \ 1 01-page180 | |
| Testing procedures for rear road springs, shock dampers, and axle strength. | 12th Feb 1913 | Box 3 \ 1 01-page181 | |
| With sketches detailing two designs for road springs, including quantities and annotations. | 12th Feb 1913 | Box 3 \ 1 01-page182 | |
| Brief typed note regarding spring removal with handwritten reference numbers. | 27th Feb 1913 | Box 3 \ 1 01-page183 | |
| Mr. Royce's suggestion to test cars with rusty springs and without shock absorbers. | 27th Feb 1913 | Box 3 \ 1 01-page184 | |
| Mr. Royce's suggestion to test grasshopper springs without shock absorbers or grease. | 28th Feb 1913 | Box 3 \ 1 01-page185 | |
| Final report on experiments with road springs, focusing on friction between the leaves and rear shock absorbers. | 1st Apr 1913 | Box 3 \ 1 01-page186 | |
| Testing experimental cars with disconnected rear shock absorbers and the resulting effects on weight and spring friction. | 10th Apr 1913 | Box 3 \ 1 01-page187 | |
| Recommending the cancellation of rear shock absorbers until their benefit can be proven. | 10th Apr 1913 | Box 3 \ 1 01-page188 | |
| Departmental memo discussing Mr. Royce's recommendation to cancel shock absorbers on rear brakes. | 11th Apr 1913 | Box 3 \ 1 01-page189 | |
| Departmental memo regarding Mr. Royce's recommendation to cancel rear shock absorbers. | 11th Apr 1913 | Box 3 \ 1 01-page190 | |
| Departmental memo discussing whether road springs should be oiled and the subsequent decision to abandon the experiment. | 8th Apr 1913 | Box 3 \ 1 01-page191 | |
| Clarifying that shock absorbers are cancelled for rear springs, not brakes, and that springs should be assembled dry. | 11th Apr 1913 | Box 3 \ 1 01-page192 | |
| Clarifying a previous typo regarding the oiling of road springs, seeking agreement to attach a note to each chassis. | 21th Apr 1913 | Box 3 \ 1 01-page193 | |
| Chassis 2301 regarding rear springs fitted without shock absorbers. | 22th Apr 1913 | Box 3 \ 1 01-page194 | |
| F.H.R.'s remarks regarding rear springs without shock absorbers. | 10th Jun 1913 | Box 3 \ 1 01-page195 | |
| Report from Hurst detailing observations on Chassis 2301's suspension performance over several weeks. | 10th Jun 1913 | Box 3 \ 1 01-page196 | |
| Log report from Bullamore detailing observations of spring rusting on Chassis 1926. | 10th Jun 1913 | Box 3 \ 1 01-page197 | |
| Points from a report by Mr Oldham, including concerns about the increase in chassis weight. | 9th Oct 1912 | Box 3 \ 2 02-page001 | |
| Notes on rising chassis weight, large road wheels, and side brake lever position. | 9th Oct 1912 | Box 3 \ 2 02-page002 | |
| Turning circles, jacking points, self-starters, and a new aluminium alloy. | 10th Oct 1912 | Box 3 \ 2 02-page003 | |
| Internal instruction memo discussing the reduction of chassis weight. | 10th Oct 1912 | Box 3 \ 2 02-page004 | |
| Instructions regarding chassis weighing, self-starters, and other notes on cars. | 10th Oct 1912 | Box 3 \ 2 02-page005 | |
| Instructions regarding a starting device and the experimental use of Navalium metal for pistons. | 10th Oct 1912 | Box 3 \ 2 02-page006 | |
| Request to weigh competitor chassis for a comparative analysis. | 19th Oct 1912 | Box 3 \ 2 02-page007 | |
| Departmental memo detailing and comparing chassis weights for the 2000 and 2100 series. | 24th Oct 1912 | Box 3 \ 2 02-page008 | |
| Departmental memo discussing component weight changes, chassis overweight issues, and updates to road wheels and turning circle. | 13th Aug 1906 | Box 3 \ 2 02-page009 | |
| Departmental memo discussing steering tube adjustments, tyre clearance for steering locks, and considerations for jacking up cars. | 13th Oct 1922 | Box 3 \ 2 02-page010 | |
| Instruction sheet detailing a comparison of chassis weights for various vehicle makes. | 6th Nov 1912 | Box 3 \ 2 02-page011 | |
| Instruction note comparing chassis weights and included components for various motor cars. | 11th Jan 1913 | Box 3 \ 2 02-page012 | |
| Instructions regarding the weight of springs and Dunlop tyres on a chassis. | 10th Dec 1918 | Box 3 \ 2 02-page013 | |
| Instruction sheet detailing chassis weights for a Delaunay Belleville vehicle. | 30th Nov 1912 | Box 3 \ 2 02-page014 | |
| Extract from a report on chassis 2100E regarding a suggestion to weigh axle parts to determine weight savings. | 18th Dec 1912 | Box 3 \ 2 02-page015 | |
| Mr. Royce's suggestion and a new scheme for including rough and finished weight limits on all drawings. | 3rd Feb 1912 | Box 3 \ 2 02-page016 | |
| To the Technical Committee regarding the inspection of parts for weight, noting Mr Royce's request for weight limits on all drawings. | 3rd Feb 1912 | Box 3 \ 2 02-page017 | |
| From F.H. Royce regarding the removal of unnecessary weight from the chassis. | 9th Apr 1912 | Box 3 \ 2 02-page018 | |
| Departmental memo regarding an instruction from Mr Royce for the weighing of motor car parts. | 10th Feb 1913 | Box 3 \ 2 02-page019 | |
| Instructing staff on the monthly reporting process for weighing motor car parts. | 10th Feb 1913 | Box 3 \ 2 02-page020 | |
| Outlining the procedure for weighing and recording changes to motor car part weights for chassis balance sheets. | 10th Feb 1913 | Box 3 \ 2 02-page021 | |
| Outlining the process for weighing car parts and reporting on weight changes. | 10th Feb 1913 | Box 3 \ 2 02-page022 | |
| Comparison of spring characteristics and vehicle weights between Rolls-Royce, Lanchester, and Delauney Belville cars. | 6th Apr 1913 | Box 3 \ 2 02-page023 | |
| Experimental Department 'B' weekly report detailing reports sent and weight calculations for fitting double rear brakes. | 22th Apr 1913 | Box 3 \ 2 02-page024 | |
| Technical report discussing unsprung weight calculations, axle modifications, and tests on clutch couplings and helical gears. | 20th May 1913 | Box 3 \ 2 02-page025 | |
| Departmental memo requesting clarification on the components to be included in a 6-cylinder engine weight calculation. | 20th May 1913 | Box 3 \ 2 02-page026 | |
| Weight of a 6-cylinder engine. | 31th May 1913 | Box 3 \ 2 02-page027 | |
| Internal request and response regarding the total weight of a chassis with specific fitments. | 4th Sep 1913 | Box 3 \ 2 02-page028 | |
| Reporting the total chassis weight as 2980 lbs and correcting the addressee for future memoranda to the Experimental shop. | 12th Sep 1913 | Box 3 \ 2 02-page029 | |
| The increasing weight of the chassis and instructions for weight reduction. | 8th Nov 1913 | Box 3 \ 2 02-page030 | |
| Urgently requesting a reply concerning the weights of cars, specifically model X.200. | 17th Nov 1913 | Box 3 \ 2 02-page031 | |
| Changes and standard weights for various chassis series. | 17th Nov 1913 | Box 3 \ 2 02-page032 | |
| Weight and feature comparison between the 2700 type standard and colonial vehicles. | 28th Sep 1912 | Box 3 \ 2 02-page033 | |
| Weights of various chassis series and the reasons for weight increases. | 18th Nov 1913 | Box 3 \ 2 02-page034 | |
| Calculating the weight difference between two tyre types for a back axle unit. | 18th Jan 1923 | Box 3 \ 2 02-page035 | |
| Listing vehicle modifications and associated weight calculations. | 18th Nov 1913 | Box 3 \ 2 02-page036 | |
| Log of vehicle series numbers against their corresponding weights in hundredweights (cwts). | 21th Nov 1913 | Box 3 \ 2 02-page037 | |
| Confirming the standardisation of balance weights, noting an extra weight of 26½ lbs. | 21th Nov 1913 | Box 3 \ 2 02-page038 | |
| The weight of a 2600 type front axle and its tie rods. | 11th Dec 1913 | Box 3 \ 2 02-page039 | |
| Listing the weights of a front axle and a set of tie rods. | 30th Apr 1908 | Box 3 \ 2 02-page040 | |
| Weight comparison between a standard goods spring and a solid eye spring. | 18th Dec 1913 | Box 3 \ 2 02-page041 | |
| Listing the weights of various chassis parts in response to a memo. | 19th Dec 1913 | Box 3 \ 2 02-page042 | |
| Bumping test of front springs with rolled eyes. | 22th Dec 1913 | Box 3 \ 2 02-page043 | |
| Urgent request for a report on axle weights for Mr Royce. | 6th Jan 1914 | Box 3 \ 2 02-page044 | |
| Internal instruction regarding a request for the unsprung weights of an axle. | 25th Sep 1916 | Box 3 \ 2 02-page045 | |
| Weight comparison sheet for Silencer, Bonnet, and Crankcase components for models 2700 and 2800. | 11th Dec 1926 | Box 3 \ 2 02-page046 | |
| Weight schedule for Starting Handle components and other engine series parts. | 11th Dec 1926 | Box 3 \ 2 02-page047 | |
| The weights of various rear axles, including different configurations with wheels and tyres. | 12th Jan 1914 | Box 3 \ 2 02-page048 | |
| List comparing the weights of different axle, brake, wheel, and spring configurations. | 15th Jan 1914 | Box 3 \ 2 02-page049 | |
| Clarifying the weight of a new type Throttle & Induction Pipe. | 15th Jan 1914 | Box 3 \ 2 02-page050 | |
| Weight of a set of Trious shock absorbers. | 19th Jan 1914 | Box 3 \ 2 02-page051 | |
| Internal request for the weights of rear axles for comparison with other high-class standard cars. | 2nd Jul 1914 | Box 3 \ 2 02-page052 | |
| The hand adjustment for double rear brakes, detailing component weights and forging methods. | 8th Apr 1914 | Box 3 \ 2 02-page053 | |
| Quarterly note asking if new chassis parts are being weighed every three months, with handwritten responses. | 30th Apr 1914 | Box 3 \ 2 02-page054 | |
| Request for a list of the weights of various reciprocating parts, specifically pistons and connecting rods. | 26th May 1914 | Box 3 \ 2 02-page055 | |
| Extract from a report on a 10,000-mile engine bench test, detailing weight changes of engine components. | 2nd Apr 1926 | Box 3 \ 2 02-page056 | |
| Requesting the weights of Pistons and Connecting Rods. | 29th Jun 1914 | Box 3 \ 2 02-page057 | |
| Instruction sheet listing the weights of various pistons and connecting rods. | 1st Apr 1914 | Box 3 \ 2 02-page058 | |
| The weights of various pistons and connecting rods. | 2nd Jul 1914 | Box 3 \ 2 02-page059 | |
| Deferring an investigation into chassis weights until a new chassis is released. | 28th Jul 1914 | Box 3 \ 2 02-page060 | |
| Telegram to Mr. Royce detailing engine component weights and potential savings. | 13th Aug 1914 | Box 3 \ 2 02-page061 | |
| Instruction requesting the weights of 3-speed and 4-speed gearboxes and associated components for comparison purposes. | 12th Nov 1916 | Box 3 \ 2 02-page062 | |
| The weight of 3 and 4 speed gearboxes and their associated levers. | 17th Nov 1914 | Box 3 \ 2 02-page063 | |
| The weights of 4-speed and 3-speed gearboxes and associated levers. | 17th Nov 1914 | Box 3 \ 2 02-page064 | |
| Comparing the weights of Northcliffe, Williamson, and standard cylinders following a request from Mr. Royce. | 25th Jan 1915 | Box 3 \ 2 02-page065 | |
| Table detailing the maximum, minimum, and mean weights in pounds for various chassis series. | 9th Feb 1913 | Box 3 \ 2 02-page066 | |
| Urgent request for the weight of a 20' Orme Evans Radiator for standardisation purposes. | 11th May 1915 | Box 3 \ 2 02-page067 | |
| Procedure for weighing new and replacement parts to monitor changes in overall chassis weight. | 19th May 1919 | Box 3 \ 2 02-page068 | |
| Weight difference between steel and aluminium brake straps. | 10th Jun 1919 | Box 3 \ 2 02-page069 | |
| Assembly details for the 'F' section of Chassis 1. E.X. | 30th Jun 1919 | Box 3 \ 2 02-page070 | |
| Assembly details for chassis 1 EX, listing part numbers and specifications. | 1st Jun 1919 | Box 3 \ 2 02-page071 | |
| Weight of a starter gear and the advantages of a split bottom leaf rear spring. | 3rd Nov 1919 | Box 3 \ 2 02-page072 | |
| The testing and comparison of Dunlop wheels fitted with Goodyear demountable rims. | 13th Nov 1919 | Box 3 \ 2 02-page073 | |
| Specification document detailing the weight of a radiator when empty and full of water. | 16th Dec 1919 | Box 3 \ 2 02-page074 | |
| The specifications and testing of two newly produced radiators for the 40/50 chassis, comparing them to the Marston radiator. | 24th Dec 1919 | Box 3 \ 2 02-page075 | |
| Issues with radiator manufacturers and the testing of a radiator on a 10,000-mile test car. | 24th Dec 1919 | Box 3 \ 2 02-page076 | |
| Weight comparison between a pair of Gleason Bevels and a pair of Standard Straight Bevels. | 6th Jan 1920 | Box 3 \ 2 02-page077 | |
| Comparative analysis of weights and specifications for Packard and Rolls-Royce rear axles and bevels. | 24th Mar 1920 | Box 3 \ 2 02-page078 | |
| Comparison of Firestone, Stanwell, and Goodyear demountable rims based on weight, ease of use, and safety. | 19th May 1920 | Box 3 \ 2 02-page079 | |
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