| Description | Date | Identifier | |
| Testing E.A.C. servo brake shoes lined with cast iron. | 24th Jan 1924 | Box 30 \ 6 Scan163 | |
| Brakes road test, detailing issues with servo liner wear and friction. | 25th Jan 1924 | Box 30 \ 6 Scan164 | |
| Brake performance and wear, comparing 4-wheel braking to 2-wheel systems under severe road conditions. | 25th Jan 1924 | Box 30 \ 6 Scan165 | |
| Using cast iron to achieve a consistent servo brake and equal braking. | 26th Jan 1924 | Box 30 \ 6 Scan166 | |
| Test rig results for servo performance with Ferodo and cast iron liners. | 26th Jan 1924 | Box 30 \ 6 Scan167 | |
| Comparing brake performance with modified and standard leverages. | 26th Jan 1924 | Box 30 \ 6 Scan168 | |
| Letter from France discussing the development of slow speed servo brakes, conversion parts for the 40/50 model, and observations on competing designs. | 27th Jan 1924 | Box 30 \ 6 Scan169 | |
| Investigating the cause and cure for brake 'jaggers'. | 28th Jan 1924 | Box 30 \ 6 Scan170 | |
| Calculation comparing the unit pressure on the RR. servo shoes to the Hispano servo. | 12th Jul 1923 | Box 30 \ 6 Scan171 | |
| The suggested cause for the chattering of front brakes, including a force diagram. | 12th Jul 1923 | Box 30 \ 6 Scan172 | |
| Page detailing the periodic action of spring and friction forces, likely within a braking system. | 12th Jul 1923 | Box 30 \ 6 Scan173 | |
| 40/50 HP car brake testing with cast iron liners and comparison with the Hispano servo. | 30th Jan 1924 | Box 30 \ 6 Scan174 | |
| Comparing the performance of Rolls-Royce and Hispano-Suiza cars. | 1st Feb 1924 | Box 30 \ 6 Scan175 | |
| Braking tests conducted in North Devon. | 12th Jul 1923 | Box 30 \ 6 Scan176 | |
| The hill-climbing performance of a 40/50 HP car in North Devon. | 1st Feb 1924 | Box 30 \ 6 Scan177 | |
| Hill climbing test results comparing a 40/50 HP chassis against a Hispano Suiza in North Devon. | 1st Feb 1924 | Box 30 \ 6 Scan178 | |
| Comparison of brake tests conducted in North Devon between the R.A.C. High Speed Servo and Hispano systems. | 1st Feb 1924 | Box 30 \ 6 Scan179 | |
| Slow-speed brake servo for a 40/50 car. | 1st Feb 1924 | Box 30 \ 6 Scan180 | |
| Modifications to the brakes, specifically the low speed servo and pedal pressure issues. | 11th Aug 1924 | Box 30 \ 6 Scan181 | |
| The performance and wear characteristics of jointed brake shoes. | 15th Feb 1924 | Box 30 \ 6 Scan182 | |
| Drawing illustrating wear on a wrapping shoe after testing. | 15th Feb 1924 | Box 30 \ 6 Scan183 | |
| The wear and efficiency of jointed brake shoes. | 15th Feb 1924 | Box 30 \ 6 Scan184 | |
| The co-efficient of static friction for Ferodo brake shoes. | 1st Feb 1924 | Box 30 \ 6 Scan185 | |
| Testing different brake servo friction materials and investigating pressure loss issues. | 2nd Feb 1924 | Box 30 \ 6 Scan186 | |
| Suggested improvements for the front brakes on the 40/50 HP car. | 23th Feb 1924 | Box 30 \ 6 Scan187 | |
| Issues with brake pivot nuts, carrier bolts, lubricator accessibility, and protection from mud and water. | 12th Jul 1923 | Box 30 \ 6 Scan188 | |
| Recommendation to increase the Brinell hardness of 40/50 HP rear brake drums due to issues with wear and scoring. | 2nd Jun 1924 | Box 30 \ 6 Scan189 | |
| Reduced ride comfort caused by fitting stiffer front springs. | 12th Jul 1923 | Box 30 \ 6 Scan190 | |
| Statement about the unacceptable impact on ride comfort caused by the addition of front brakes. | 7th Apr 1924 | Box 30 \ 6 Scan191 | |
| Secret memo discussing lag and sticking issues in an E.A.C. servo mechanism, comparing it to a Renault scheme. | 7th Apr 1924 | Box 30 \ 6 Scan192 | |
| Comparative analysis of the braking systems of Sunbeam and Bentley vehicles. | 17th Jun 1924 | Box 30 \ 6 Scan193 | |
| Technical memorandum discussing cam leverage in four-wheel brake systems. | 10th Oct 1924 | Box 30 \ 6 Scan194 | |
| Requesting to forward an enclosed letter about four-wheel brakes to Monsieur Henri Perrot. | 27th Nov 1924 | Box 30 \ 6 Scan195 | |
| Brake deceleration and efficiency tests on a 'Vermorel' car. | 23th Mar 1925 | Box 30 \ 6 Scan196 | |
| Test of a Ferodo strip, as used on Morris Cowley cars, to reduce brake squeaks. | 1st Apr 1925 | Box 30 \ 6 Scan197 | |
| Four-wheel braking and car control, discussing front axle rigidity and steering effects. | 7th Sep 1925 | Box 30 \ 6 Scan198 | |
| Calculations and experimental results for steering moments and the effect of single-wheel braking. | 12th Jun 1925 | Box 30 \ 6 Scan199 | |
| Analysis of steering behavior and axle torsion when a single front brake is applied. | 12th Jun 1925 | Box 30 \ 6 Scan200 | |
| Responding to General Motors' request for information regarding a front wheel brake design, referencing an Oldsmobile blueprint. | 8th Nov 1937 | Box 30 \ 6 Scan201 | |
| Front axle with brake, returning a drawing and part while noting design differences. | 9th Nov 1927 | Box 30 \ 6 Scan202 | |
| Cause of 'brake thumps' and proposing the experimental use of an oil dashpot. | 20th Aug 1932 | Box 30 \ 6 Scan203 | |
| Description of a semi-hydraulic brake system proposed for patent purposes. | 10th May 1932 | Box 30 \ 6 Scan204 | |
| Outlining a different scheme for hydraulically operated brakes. | 27th Oct 1932 | Box 30 \ 6 Scan205 | |
| Diagrams and patentable features for a hydraulic brake operation system. | 16th Nov 1932 | Box 30 \ 6 Scan206 | |
| Investigating a vacuum servo diagram for brake operation with a view to patenting. | 16th Nov 1932 | Box 30 \ 6 Scan207 | |
| Alternative method for an actuating cylinder with automatic adjustment for hydraulic brakes. | 16th Nov 1932 | Box 30 \ 6 Scan208 | |
| On the hydraulic operation of brakes, concerning a separate valve for replenishment and temperature-related expansion. | 17th Nov 1932 | Box 30 \ 6 Scan209 | |
| Brake layouts, front-to-rear braking ratios, and experiments on chassis J.III. | 12th Apr 1933 | Box 30 \ 6 Scan210 | |
| Series of diagrams and graphs analyzing brake system layouts and performance for various models. | 19th Jun 1933 | Box 30 \ 6 Scan211 | |
| Modification scheme to the axle control (Hs.1043) to fix 'brake jaggers' on the 1.J.3. chassis. | 19th Jun 1933 | Box 30 \ 6 Scan212 | |
| Blueprint for a modified axle control component, detailing spring specifications. | 10th Jun 1933 | Box 30 \ 6 Scan213 | |
| On tests investigating brake thumps on a 2.E.TV. chassis, concluding the oil dashpot was ineffective. | 4th Jul 1933 | Box 30 \ 6 Scan214 | |
| Undesirable weight increase due to switching from aluminium to steel brake shoes on a Bentley. | 25th Aug 1933 | Box 30 \ 6 Scan215 | |
| Design choice between forged steel and welded sheet metal for brake shoes. | 28th Aug 1933 | Box 30 \ 6 Scan216 | |
| Proposing a test to determine if aluminium brake shoes permanently increase in size when heated. | 27th Sep 1933 | Box 30 \ 6 Scan217 | |
| Blueprint showing the arrangement of a spring balance for servo tests. | 13th Oct 1933 | Box 30 \ 6 Scan218 | |
| Recommended cures for inefficient brakes, focusing on oil contamination of the servo and experiments with new linings. | 12th Oct 1935 | Box 30 \ 6 Scan219 | |
| Technical memo detailing a method for testing inefficient brakes by measuring servo output with spring balances. | 12th Oct 1933 | Box 30 \ 6 Scan220 | |
| Table of input and output figures for efficient servos on various chassis models. | 12th Oct 1933 | Box 30 \ 6 Scan221 | |
| Front brake clearances and adjustments, comparing the current system to the Bentley layout for the 20/25 model. | 19th Oct 1933 | Box 30 \ 6 Scan222 | |
| The distortion of aluminium brake shoes after two stages of heat treatment. | 19th Oct 1933 | Box 30 \ 6 Scan223 | |
| Tests on brake straps to reduce seizures by heat-treating the shoe castings. | 27th Oct 1933 | Box 30 \ 6 Scan224 | |
| Experiments conducted to resolve 'brake thumps' by modifying the braking system. | 7th Nov 1933 | Box 30 \ 6 Scan225 | |
| Sample of heat-resisting enamel for exhaust manifolds. | 6th Nov 1931 | Box 31 \ 1 Scan001 | |
| Testing heat-resisting enamel for exhaust manifolds. | 11th Nov 1931 | Box 31 \ 1 Scan002 | |
| The despatch of a Phantom II Manifold for heat-resisting enamel treatment after a sample proved successful. | 11th Nov 1931 | Box 31 \ 1 Scan003 | |
| Despatch note for an exhaust manifold suitable for a 40/50 HP chassis to be sent to The Enamelled Iron & Steel Products Ltd. | 12th Nov 1931 | Box 31 \ 1 Scan004 | |
| Inability of the Pyrene Co. to parkerise exhaust pipes due to equipment size limitations. | 17th Dec 1931 | Box 31 \ 1 Scan005 | |
| Use of the Cosletizing process for treating replacement silencers to gather data on corrosion prevention. | 1st Jan 1932 | Box 31 \ 1 Scan006 | |
| Comparing the effectiveness of Parkerizing versus Coslettizing treatments for exhaust pipes. | 6th Jan 1932 | Box 31 \ 1 Scan007 | |
| Cost comparison and potential standardisation of lagging clips for exhaust pipes. | 18th Nov 1933 | Box 31 \ 1 Scan008 | |
| Switch to 'Jubilee' type lagging clips for exhaust pipes on 20/25 and 40/50 HP chassis. | 20th Nov 1933 | Box 31 \ 1 Scan009 | |
| Replacement of Staybrite clips with Jubilee clips on the exhaust pipes for the 20/25 and 40/50 HP chassis. | 23th Nov 1933 | Box 31 \ 1 Scan010 | |
| Comparison of stiffness, weight, and features for a new S.S. crankshaft with large pins against standard shafts. | 29th Aug 1929 | Box 31 \ 1 Scan011 | |
| Meeting about fitting a Scott Self Starter, including weights and performance data. | 6th Dec 1913 | Box 31 \ 1 Scan012 | |
| Starter motor and dynamo applications, including details on a 20 HP Crossley gear and voltage regulation. | 6th Dec 1913 | Box 31 \ 1 Scan013 | |
| Starter trial from 'the Scott people', chain dimensions, and component approvals. | 19th Feb 1920 | Box 31 \ 1 Scan014 | |
| Inquiry regarding the 'Bijur' electric lighting set sold by Duncan Watson & Co of London. | 28th Jan 1914 | Box 31 \ 1 Scan015 | |
| Mr. Royce regarding noise and contact materials of various dynamo regulators, with a reply from the works. | 3rd Apr 1914 | Box 31 \ 1 Scan016 | |
| The performance and noise levels of various dynamo regulators. | 6th Apr 1914 | Box 31 \ 1 Scan017 | |
| Instructions for experiments on Bijur and Bosch dynamos. | 24th Oct 1914 | Box 31 \ 1 Scan018 | |
| The dissatisfaction with a sample Lucas dynamo and the proposal to use a 'Bijur' set as a replacement for testing. | 29th Jan 1918 | Box 31 \ 1 Scan019 | |
| Potential use and modification of a Bijur dynamo and regulator for a 12-volt system. | 30th Jan 1918 | Box 31 \ 1 Scan020 | |
| Modifying electrical circuit resistance for a 12-volt battery system. | 30th Jan 1918 | Box 31 \ 1 Scan021 | |
| Dynamo proposition from Messrs. Newton Bros. for the first 1000 chassis. | 10th Dec 1918 | Box 31 \ 1 Scan022 | |
| Extract discussing an instrument board clock and switch, a sample being sent, and a comparison of voltage schemes. | 15th Jan 1919 | Box 31 \ 1 Scan023 | |
| Adopting a 12-volt constant voltage lighting system for the 40/50 chassis. | 17th Jan 1919 | Box 31 \ 1 Scan024 | |
| Extract detailing a preference for the Bijur scheme of control for dynamos on the chassis. | 17th Jan 1919 | Box 31 \ 1 Scan025 | |
| Letter detailing specifications for a Dynamo/Generator supplied by Remy to the Stearns Company. | 17th Feb 1919 | Box 31 \ 1 Scan026 | |
| Continuation page of a letter from a consulting engineer regarding an automatic temperature-dependent control for a generator. | 26th Feb 1919 | Box 31 \ 1 Scan027 | |
| Modification of a Bijur dynamo's regulator and considering a new shunt wound dynamo design. | 26th Feb 1919 | Box 31 \ 1 Scan028 | |
| Page discussing a trial regulator design and the planned testing of new C.A.V. N;G.R.R. type dynamos. | 26th Feb 1919 | Box 31 \ 1 Scan029 | |
| Letter responding to a proposal for dynamo control, discussing thermostatic vs voltage regulation methods. | 5th Mar 1919 | Box 31 \ 1 Scan030 | |
| The concluding page of a letter apologising for a delay in reply. | 5th Mar 1919 | Box 31 \ 1 Scan031 | |
| Letter from a consulting engineer regarding a generator and thermostat control for a chassis, also mentioning an influenza epidemic. | 6th Mar 1919 | Box 31 \ 1 Scan032 | |
| Letter from The British Thomson-Houston Co. Ltd. requesting specifications for a car lighting generator design. | 13th Mar 1919 | Box 31 \ 1 Scan033 | |
| Letter outlining the requirements and specifications for a car lighting dynamo. | 14th Mar 1919 | Box 31 \ 1 Scan034 | |
| The concluding page of a letter addressing a customer's requirements. | 14th Mar 1919 | Box 31 \ 1 Scan035 | |
| Letter from The British Thomson-Houston Co. Ltd. regarding a dynamo for car lighting. | 15th Mar 1919 | Box 31 \ 1 Scan036 | |
| Replacing a Packard dynamo with a Bijur dynamo and issues with the engine's 'hit and miss' governor. | 15th Apr 1919 | Box 31 \ 1 Scan037 | |
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