| Description | Date | Identifier | |
| Description of the function of a damper within the brake mechanism. | 15th Oct 1929 | Box 16 \ 3 Scan078 | |
| Cover note for an attached print concerning the clanking of a brake mechanism. | 15th Oct 1929 | Box 16 \ 3 Scan079 | |
| Depot sheet detailing the standardisation of moulded asbestos brake linings for the Phantom II to reduce squeaking. | 2nd Jan 1930 | Box 16 \ 3 Scan080 | |
| Issues with Ferobestos brake linings on the Phantom II, recommending a switch to Ferodo Bonded Asbestos for the rear brakes. | 6th Feb 1930 | Box 16 \ 3 Scan081 | |
| Seventh report of the Design Committee, discussing the hot well pump and modifications to the steering column. | 14th Feb 1930 | Box 16 \ 3 Scan082 | |
| On a Phantom II brake servo failure due to disintegrating friction material. | 19th Mar 1930 | Box 16 \ 3 Scan083 | |
| Material choices and fixing methods for clutches, referencing issues on the Phantom I and a 20-HP experimental car. | 19th Mar 1930 | Box 16 \ 3 Scan084 | |
| Phantom II brake servo failure, suggesting an increase in the dimension under the rivet head for the lining. | 20th Mar 1930 | Box 16 \ 3 Scan085 | |
| Service bulletin addressing the issue of servo squeaks, its cause, and the prescribed remedy. | 21th Mar 1930 | Box 16 \ 3 Scan086 | |
| Internal order request for Phantom II and 20 HP servo linings. | 5th Apr 1930 | Box 16 \ 3 Scan087 | |
| Use of staples versus rivets for fixing Cotton-Duck servo linings on a 20 HP chassis. | 22th May 1930 | Box 16 \ 3 Scan088 | |
| Standardisation report on securing servo fabric with staples and adding a damper to stop servo clank. | 12th Jun 1930 | Box 16 \ 3 Scan089 | |
| Inconsistent friction load on a suspension bracket servo, caused by oil and paraffin contamination of the lining, with a proposed solution. | 10th Sep 1930 | Box 16 \ 3 Scan090 | |
| Request to mill a groove in the outer pressure plate of the servo for the 24-EX model. | 17th Dec 1930 | Box 16 \ 3 Scan091 | |
| The swapping of servo friction plates between two experimental chassis, 19-EX and 22-EX. | 10th Mar 1931 | Box 16 \ 3 Scan092 | |
| Standardization of ball bearing cams for the Servo on 40/50 HP and 25 HP models. | 20th Oct 1931 | Box 16 \ 3 Scan093 | |
| Purchase and payment for two flying suits and two pairs of gloves. | 16th Nov 1931 | Box 16 \ 3 Scan094 | |
| Query regarding the standardisation of cam face angles for Phantom II foot brakes. | 17th Nov 1931 | Box 16 \ 3 Scan095 | |
| Standardisation of servo operating levers and ball bearing cams for the chassis. | 26th Sep 1931 | Box 16 \ 3 Scan096 | |
| Introduction of a new part to a chassis series, including cost implications. | 1st Feb 1916 | Box 16 \ 3 Scan097 | |
| Brake servo failures on the Phantom II due to bearing wear and proposing a new ball bearing design. | 25th May 1932 | Box 16 \ 3 Scan098 | |
| Page 2 of a memorandum discussing lubrication supply issues with a needle roller bearing and requesting feedback on a modification. | 25th May 1932 | Box 16 \ 3 Scan099 | |
| Trial and comparison of different materials for servo linings. | 9th Sep 1932 | Box 16 \ 3 Scan100 | |
| Design, materials, and challenges of servo-assisted braking systems. | 14th Sep 1932 | Box 16 \ 3 Scan101 | |
| Investigation into the failure of servo fabrics at the Cricklewood depot. | 20th Sep 1932 | Box 16 \ 3 Scan102 | |
| New servo lining sample, Ferodo RAD.13, and recommendations for its implementation. | 10th Oct 1932 | Box 16 \ 3 Scan103 | |
| Servo efficiency issues found during the dismantling of a servo on Chassis N.141. | 13th Oct 1932 | Box 16 \ 3 Scan104 | |
| Previously designed servo system and related patent considerations. | 7th Nov 1932 | Box 16 \ 3 Scan105 | |
| Standardisation of a new type of servo lining for 20/25 & 40/50 chassis parts. | 10th Oct 1932 | Box 16 \ 3 Scan106 | |
| Standardisation form for chassis parts detailing new part fitment and associated costs. | 16th Nov 1932 | Box 16 \ 3 Scan107 | |
| Three design suggestions for a forward-only servo mechanism. | 16th Nov 1932 | Box 16 \ 3 Scan108 | |
| Modifications to servo fabrics and linings for Ferodo. | 22th Nov 1932 | Box 16 \ 3 Scan109 | |
| Recommendation to adopt a .010' diametral clearance on all servo driving pins following a 10,000-mile test. | 25th Jan 1933 | Box 16 \ 3 Scan110 | |
| Standardisation of the Servo Motor Centre Ball Bearing on the Servo Bridge. | 5th Oct 1932 | Box 16 \ 3 Scan111 | |
| Standardisation form for a new chassis part. | 30th Sep 1936 | Box 16 \ 3 Scan112 | |
| Requesting the issue of details for a 40/50 servo. | 16th Oct 1933 | Box 16 \ 3 Scan113 | |
| Suggesting a change to the 40/50HP servo shaft lubrication scheme to a hand lubricator. | 14th Feb 1934 | Box 16 \ 3 Scan114 | |
| Standardisation of parts report for a fully floating servo. | 28th May 1934 | Box 16 \ 3 Scan115 | |
| Estimated cost for extra jigs, tools, and equipment for the 'T' series chassis. | 18th May 1934 | Box 16 \ 3 Scan116 | |
| Experimental department report on a ball bearing for a brake system servo motor. | 19th Dec 1934 | Box 16 \ 3 Scan117 | |
| Experiments comparing a special bearing with an ordinary ball bearing in servo motors. | 19th Dec 1934 | Box 16 \ 3 Scan118 | |
| Graph comparing the hysteresis of special and ordinary ball bearings supporting the inner pressure plate of a Bentley & 25 HP servo. | 19th Dec 1934 | Box 16 \ 3 Scan119 | |
| Stamped page from the Print Room in Derby. | 19th Dec 1934 | Box 16 \ 3 Scan120 | |
| Conclusions on fitting hydraulic shock dampers to a Phantom rear axle. | 4th Apr 1926 | Box 16 \ 4 Scan001 | |
| Fixing 20 HP shock dampers and an objection regarding petrol pipe routing. | 10th Apr 1926 | Box 16 \ 4 Scan002 | |
| Investigation and design for fitting hydraulic shock dampers to chassis 7-EX and EAC.V111. | 21th Apr 1926 | Box 16 \ 4 Scan003 | |
| Modified arrangement for rear hydraulic shock dampers involving a longer connecting rod. | 26th Apr 1926 | Box 16 \ 4 Scan004 | |
| Explaining an issue with hydraulic dampers caused by a drilling jig made from the wrong drawing. | 5th May 1926 | Box 16 \ 4 Scan005 | |
| Sending hydraulic shock dampers to France for testing with different oils and adjusted settings. | 28th Jun 1926 | Box 16 \ 4 Scan006 | |
| Modifications to the front axle forging and brake gear as per N.Scheme 2230. | 10th Jul 1926 | Box 16 \ 4 Scan007 | |
| Modifications for fitting hydraulic shock dampers on the rear of the EAC-7 chassis. | 23th Jul 1926 | Box 16 \ 4 Scan008 | |
| Modifications to the front shock damper, including shortening the operating lever and reducing the rubber buffer volume. | 1st Sep 1926 | Box 16 \ 4 Scan009 | |
| New settings for front shock dampers and suggesting modifications to the air vent and breather. | 15th Sep 1926 | Box 16 \ 4 Scan010 | |
| Standardisation of front hydraulic shock dampers to prevent high speed wobbles. | 23th Sep 1926 | Box 16 \ 4 Scan011 | |
| Cost difference for the standardisation of front hydraulic shock dampers. | 4th Oct 1926 | Box 16 \ 4 Scan012 | |
| Standardisation of rear hydraulic shock dampers. | 1st Oct 1926 | Box 16 \ 4 Scan013 | |
| The trial of hydraulic shock dampers, detailing their performance disadvantages and manufacturing difficulties. | 1st Dec 1926 | Box 16 \ 4 Scan014 | |
| Modifications to rear shock dampers due to insufficient ground clearance on car EAC.7. | 22th Dec 1926 | Box 16 \ 4 Scan015 | |
| Trial of aluminium washers in place of fibre on shock absorbers. | 8th Jan 1927 | Box 16 \ 4 Scan016 | |
| New production program for rear hydraulic shock dampers and a proposal to test a modification for lever bearing wear. | 9th Mar 1927 | Box 16 \ 4 Scan017 | |
| The testing and modification of shock absorbers to a gravity feed scheme. | 16th Mar 1927 | Box 16 \ 4 Scan018 | |
| The mounting of hydraulic shock dampers on the rear axle of a 20 HP vehicle. | 14th Apr 1927 | Box 16 \ 4 Scan019 | |
| Instruction to alter the setting of the front hydraulic dampers on car 12-EX. | 13th May 1927 | Box 16 \ 4 Scan020 | |
| Request to fit altered rear shock absorbers to cars 12-EX and 14-EX. | 25th Oct 1927 | Box 16 \ 4 Scan021 | |
| Correct fitting of the rear shock damper stone shield to protect the lubricating pipe. | 15th Apr 1928 | Box 16 \ 4 Scan022 | |
| Letter from Rolls-Royce of America acknowledging receipt of information regarding shock absorbers on sports cars. | 24th May 1928 | Box 16 \ 4 Scan023 | |
| Modifications to the 'SS' front axle control and shock damper to resolve issues with the engine feet. | 19th Jun 1928 | Box 16 \ 4 Scan024 | |
| Graph plotting shock absorber valve leakage rates for various valve configurations. | 22th Jun 1928 | Box 16 \ 4 Scan025 | |
| Alternative arrangements for the 'SS' model rear shock damper. | 14th Jul 1928 | Box 16 \ 4 Scan026 | |
| Design of 'SS' shock damper connecting rods. | 8th Jul 1928 | Box 16 \ 4 Scan027 | |
| The central lubrication for the 'SS' rear damper connecting rod and the potential intermingling of oils. | 9th Jul 1928 | Box 16 \ 4 Scan028 | |
| Making the filling plugs on 20 HP & 40/50 HP shock absorbers more accessible. | 23th Oct 1928 | Box 16 \ 4 Scan029 | |
| Instruction to replace worn parts and adjust the load on the rear shock absorbers for vehicle 14-EX. | 28th Nov 1928 | Box 16 \ 4 Scan030 | |
| Failures of the front axle control damper levers and main lever key-way during bumper testing. | 11th Nov 1928 | Box 16 \ 4 Scan031 | |
| Hand-drawn blueprint sketch of a mechanical component with annotations. | 19th Nov 1928 | Box 16 \ 4 Scan032 | |
| Date stamp from the Derby archives on the reverse of a document. | 19th Nov 1928 | Box 16 \ 4 Scan033 | |
| Blueprint diagram illustrating a fracture on a lever for an axle control damper. | 19th Nov 1928 | Box 16 \ 4 Scan034 | |
| The reverse side of a document with a 'Print Room' stamp. | 19th Nov 1928 | Box 16 \ 4 Scan035 | |
| Fitting shock absorbers and a damper pendulum lever to the 14-EX car. | 16th Nov 1928 | Box 16 \ 4 Scan036 | |
| Requesting the deletion of an air vent from the low pressure cap of an 'SS' Axle Control Damper. | 17th Nov 1928 | Box 16 \ 4 Scan037 | |
| The method for adjusting 'SS' shock damper springs, proposing the use of washers for load adjustments. | 17th Nov 1928 | Box 16 \ 4 Scan038 | |
| Use of different thickness washers to adjust valve spring loads to eliminate high-speed wobbles. | 17th Nov 1928 | Box 16 \ 4 Scan039 | |
| Continuation page discussing the behaviour of pressure valves and mentioning forthcoming tests on dynamic restrictions. | 17th Nov 1928 | Box 16 \ 4 Scan040 | |
| Graph plotting load versus deflection for spring FS4807 under high and low pressure conditions. | 17th Nov 1928 | Box 16 \ 4 Scan041 | |
| Stamp from the Print Room in Derby. | 17th Nov 1928 | Box 16 \ 4 Scan042 | |
| Schematic drawing showing two cross-sectional views of a mechanical component. | 17th Nov 1928 | Box 16 \ 4 Scan043 | |
| Blank document page marked with a 'Print Room' stamp from Derby. | 17th Nov 1928 | Box 16 \ 4 Scan044 | |
| Test results for the 'SS' Axle Control Damper, specifically regarding the air vent design. | 17th Nov 1928 | Box 16 \ 4 Scan045 | |
| Design of the 'SS' Axle Control Damper, focusing on air vents and pressure valves to prevent air pocketing. | 21th Nov 1928 | Box 16 \ 4 Scan046 | |
| Modification to the 'SS' Axle Control Damper to prevent trapped air. | 24th Nov 1928 | Box 16 \ 4 Scan047 | |
| Instructions for fitting the 'SS' axle control arm and connecting it to the front shock absorber. | 1st Dec 1928 | Box 16 \ 4 Scan048 | |
| Strengthened lever for the 'SS' front shock damper following a fracture. | 7th Dec 1928 | Box 16 \ 4 Scan049 | |
| The need for a hole in the 'SS' undershield for maintenance access. | 10th Dec 1928 | Box 16 \ 4 Scan050 | |
| Requesting the delivery of fractured shock damper components for examination. | 8th Jan 1929 | Box 16 \ 4 Scan051 | |
| Fracture of an 'SS' shock damper shaft, proposing a strengthened design, and questioning component loading. | 1st Jan 1929 | Box 16 \ 4 Scan052 | |
| Modifications to strengthen the 'SS' shock damper outer casing following fractures. | 1st Jan 1929 | Box 16 \ 4 Scan053 | |
| Proposed modification to the 'SS' rear shock damper piston. | 16th Jan 1929 | Box 16 \ 4 Scan054 | |
| Schemes for friction heads and front shock dampers, including an analysis of failure causes. | 17th Jan 1929 | Box 16 \ 4 Scan055 | |
| Modifications to 'SS' Front Shock Dampers. | 19th Jan 1929 | Box 16 \ 4 Scan056 | |
| Modifications and schematics for the 'SS' rear shock damper to overcome defects. | 19th Jan 1929 | Box 16 \ 4 Scan057 | |
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