Rolls-Royce Archives
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
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DescriptionDateIdentifier
Remedies for a clearance issue with the cross steering tube.17th Apr 1929West Wittering \ T \ March1929-December1929  Scan081
Proposed adjustments for hydraulic dampers based on road test feedback.14th Apr 1929West Wittering \ T \ March1929-December1929  Scan082
Proposal for an easy-change gearbox device using a clutch-operated valve and suction-powered cylinder.14th Apr 1929West Wittering \ T \ March1929-December1929  Scan083
Proposed alterations for a 3.250' bore engine, focusing on the design and material of cylinder studs.18th Apr 1929West Wittering \ T \ March1929-December1929  Scan084
Design and effectiveness of hydraulic dampers.19th Apr 1929West Wittering \ T \ March1929-December1929  Scan085
Modifications to the 20HP model, including increasing engine size and chassis length to create a 25HP version.18th Apr 1929West Wittering \ T \ March1929-December1929  Scan086
Development and potential of a compression ignition unit, urging to proceed with testing.19th Apr 1929West Wittering \ T \ March1929-December1929  Scan087
Testing and proposed solutions for a slow speed steering wobble on a 20HP model.19th Apr 1929West Wittering \ T \ March1929-December1929  Scan088
Blueprint for 3.250' cylinders for a 20HP chassis.20th Apr 1929West Wittering \ T \ March1929-December1929  Scan089
Secret memo confirming a telegram and detailing modifications for increasing a 20HP chassis bore to 3.25 inches.21th Apr 1929West Wittering \ T \ March1929-December1929  Scan090
Secret internal memo requesting urgent creation of linen tracings from blueprints for a publication on the body subframe.22th Apr 1929West Wittering \ T \ March1929-December1929  Scan091
Lack of expected performance from a new 20HP turbulent head and requesting further investigation.22th Apr 1929West Wittering \ T \ March1929-December1929  Scan092
Secret memo discussing the blueprints and vibration testing for SS valve springs.23th Apr 1929West Wittering \ T \ March1929-December1929  Scan093
Secret memo discussing design modifications for the G.4 engine crankcase and its mounting.23th Apr 1929West Wittering \ T \ March1929-December1929  Scan094
Recommended oils for central lubrication systems, advocating for mineral oil over others.23th Apr 1929West Wittering \ T \ March1929-December1929  Scan095
Sample Lucas Lamp (Type R.160.S.D) and its potential trial fitting on a Phantom car.23th May 1929West Wittering \ T \ March1929-December1929  Scan096
Shape of a radiator's overflow pipe as the cause of water loss, with suggested solutions.23th Apr 1929West Wittering \ T \ March1929-December1929  Scan097
Scheme 2882, detailing controls lowered into the steering wheel and alternative klaxon switch positions.23th Apr 1929West Wittering \ T \ March1929-December1929  Scan098
Modifications to a freewheel in a gearbox sideshaft, comparing different manufacturing schemes.23th Apr 1929West Wittering \ T \ March1929-December1929  Scan099
Modification to the SS Rear Shock Damper.25th Apr 1929West Wittering \ T \ March1929-December1929  Scan100
Secret memo regarding a modified gland and spring for the SS Water Temperature Regulating Valve.3rd Apr 1929West Wittering \ T \ March1929-December1929  Scan101
Confirmation of a telegram to Royce in France regarding the 'Twenty' model's performance and sales concerns.25th Apr 1929West Wittering \ T \ March1929-December1929  Scan102
Performance report on the 20HP engine, comparing standard and turbulent heads, and detailing power increases.26th Apr 1929West Wittering \ T \ March1929-December1929  Scan103
Secret memo relaying a telegram from 'R' with instructions for a 20HP car, including fitting rollerless tappets.26th Apr 1929West Wittering \ T \ March1929-December1929  Scan104
Alterations required for a 20HP G.3 engine to accommodate a 3.250' bore.27th Apr 1929West Wittering \ T \ March1929-December1929  Scan105
Secret memorandum proposing engine and component upgrades for the 20HP model to increase performance.27th Apr 1929West Wittering \ T \ March1929-December1929  Scan106
Delayed completion of an instrument board for a Barker Allweather vehicle.29th Apr 1929West Wittering \ T \ March1929-December1929  Scan107
Clarifying confusion over the supply of lamps and accessories for experimental cars.29th Apr 1929West Wittering \ T \ March1929-December1929  Scan108
Secret internal memorandum outlining the 20HP car programme, detailing specifications for G.4, G.5, and G.6 series models.30th Apr 1929West Wittering \ T \ March1929-December1929  Scan109
Modifications to a car's rear, including lowering the floor and using hypoid gears.13th Apr 1929West Wittering \ T \ March1929-December1929  Scan110
Spring wire section for the SS. Cross Steering Tube ball joint.1st May 1929West Wittering \ T \ March1929-December1929  Scan111
From Mr. Royce detailing an experiment on an SS. Exhaust Silencer.1st May 1929West Wittering \ T \ March1929-December1929  Scan112
Secret memo proposing to thicken the SS Rear Axle shock damper bracket to double its strength, following reports of it bending.1st May 1929West Wittering \ T \ March1929-December1929  Scan113
Critique and modification request for a press button starter switch due to excessive operating pressure.2nd May 1929West Wittering \ T \ March1929-December1929  Scan114
Increase in throttle valve diameter for the 20HP carburetter.2nd May 1929West Wittering \ T \ March1929-December1929  Scan115
Conclusions and recommendations on the design and performance of hydraulic dampers.3rd May 1929West Wittering \ T \ March1929-December1929  Scan116
Design and specifications for a 3.25' diameter piston for the 'China' Chassis, focusing on the circlip design.4th May 1929West Wittering \ T \ March1929-December1929  Scan117
Alterations to piston design, including ring configuration, materials, and the 'Invar' skirt.8th May 1929West Wittering \ T \ March1929-December1929  Scan118
Proposing a revision to the air vessel scheme for the centralised chassis lubrication system by converting a junction piece.8th May 1929West Wittering \ T \ March1929-December1929  Scan119
Secret memo regarding drawings for a temporary four-point suspension system for 17-G-4.8th May 1929West Wittering \ T \ March1929-December1929  Scan120
Surplus lamps, instrument panels, and radiator shutter controls for specific vehicle models.8th May 1929West Wittering \ T \ March1929-December1929  Scan121
Proposing a design for automatically controlled shock dampers using an air spring.9th May 1929West Wittering \ T \ March1929-December1929  Scan122
Providing feedback on a car, suggesting steering improvements via spring changes and mandating the use of cream instrument faces instead of black.9th May 1929West Wittering \ T \ March1929-December1929  Scan123
Chassis frame and engine mounting modifications for 20HP models codenamed 'India', 'China', and 'Japan'.9th May 1929West Wittering \ T \ March1929-December1929  Scan124
Exhaust system alterations, radiator movement, and frame stiffness issues.14th May 1929West Wittering \ T \ March1929-December1929  Scan125
Secret memo regarding modifications to the casings of front and rear hydraulic dampers to eliminate dynamic restrictions.14th May 1929West Wittering \ T \ March1929-December1929  Scan126
Alterations to the steering lock to achieve a 38 degree lock.23th May 1929West Wittering \ T \ March1929-December1929  Scan127
Unbearable faults, including radiator shiver and engine vibrations, on a 20HP 12-G-4 Close Coupled Saloon.23th May 1929West Wittering \ T \ March1929-December1929  Scan128
Proposed modifications for a car, including radiator depth, piston types, and crankshaft stiffness.25th May 1929West Wittering \ T \ March1929-December1929  Scan129
Design and sourcing of Enots nipples with non-return valves and filters for axle lubrication.25th May 1929West Wittering \ T \ March1929-December1929  Scan130
Secret document detailing modifications and required corrections for the SS. press button starter switch.25th May 1929West Wittering \ T \ March1929-December1929  Scan131
Advantages and disadvantages of fitting thermostatically controlled radiator shutters as an alternative to hand control.27th May 1929West Wittering \ T \ March1929-December1929  Scan132
Drawing for an I-section connecting rod for the 20HP 'China' Chassis.27th May 1929West Wittering \ T \ March1929-December1929  Scan133
Issues with offering two compression ratios and feedback on improvements to the SS chassis.29th May 1929West Wittering \ T \ March1929-December1929  Scan134
Design specifications for a 20HP hypoid rear axle.29th May 1929West Wittering \ T \ March1929-December1929  Scan135
Confirmation of a wire message detailing instructions to fit a turbulent head and lighten pistons on an engine.29th May 1929West Wittering \ T \ March1929-December1929  Scan136
Critique of a 20HP Cabriolet de Ville with a blue Hooper body, discussing its performance and build quality.29th May 1929West Wittering \ T \ March1929-December1929  Scan137
Experiments on engine suspension, replacing solid mounts with rubber shoes and proposing a front pivot mounting.30th May 1929West Wittering \ T \ March1929-December1929  Scan138
Urgent experiment to incorporate a Salerni coupling into a 14-EX model vehicle.30th May 1929West Wittering \ T \ March1929-December1929  Scan139
Comparing two different connecting rod designs for the China Chassis.3rd Jun 1929West Wittering \ T \ March1929-December1929  Scan140
The design and materials for a car engine crankshaft damper, suggesting alternatives for the 'Japan' and 'China' chassis.6th Mar 1929West Wittering \ T \ March1929-December1929  Scan141
The investigation of cracks in the R engine cylinder block and proposed remedies.28th May 1929West Wittering \ T \ March1929-December1929  Scan142
Technical discussion on gearbox problems, focusing on achieving a silent 3rd speed and easier gear changes.3rd Jun 1929West Wittering \ T \ March1929-December1929  Scan143
Proposed solutions for gearbox and clutch engagement issues.3rd Jun 1929West Wittering \ T \ March1929-December1929  Scan144
The testing of and a royalty-free agreement for the Salerni coupling.5th Jun 1929West Wittering \ T \ March1929-December1929  Scan145
Feedback and proposed improvements for the 20HP 'China' specimen, ahead of a 10,000-mile trial in France.5th Jun 1929West Wittering \ T \ March1929-December1929  Scan146
Proposal for centralised chassis lubrication on 40/50 and 20HP models.5th Jun 1929West Wittering \ T \ March1929-December1929  Scan147
The fitting of a rear direction indicator and stop lamp for car 'S.S.'.6th Jun 1929West Wittering \ T \ March1929-December1929  Scan148
Modifications to the brake linkage and servo for the Salerni coupling on EAC. 7.6th Jun 1929West Wittering \ T \ March1929-December1929  Scan149
Possibility of fitting the original 40/50 radiator from car EAC. 8 to another vehicle.7th Jun 1929West Wittering \ T \ March1929-December1929  Scan150
Fitment of a third centre lamp to a Phantom model, highlighting issues and suggesting alternative solutions.7th Jun 1929West Wittering \ T \ March1929-December1929  Scan151
Correction to scheme 2899, concerning the method for retaining a large ball bearing in an experimental Salerni coupling gearbox.8th Jun 1929West Wittering \ T \ March1929-December1929  Scan152
Routing of the High-Tension (H.T.) magneto wire on a 20HP chassis.10th Jun 1929West Wittering \ T \ March1929-December1929  Scan153
From 'E' confirming Mr. Royce's requested alteration to the 20HP inlet cam form to raise the valve gear's bouncing speed.11th Jun 1929West Wittering \ T \ March1929-December1929  Scan154
Confirmation of a wire from Royce to Hives cancelling the need for a 'Twenty' car for a London trip.11th Jun 1929West Wittering \ T \ March1929-December1929  Scan155
Excessive flexibility of a 20HP side spare wheel carrier and requesting an investigation.12th Jun 1929West Wittering \ T \ March1929-December1929  Scan156
Scheme 2907 for a silent 3rd speed gearbox using a single and double helical arrangement.2nd Jun 1929West Wittering \ T \ March1929-December1929  Scan157
Scheme 2908 for a rear spare wheel carrier suitable for medium-length bodies.15th Jun 1929West Wittering \ T \ March1929-December1929  Scan158
Concluding the cause of a broken 20HP exhaust manifold and recommending a fix.17th Jun 1929West Wittering \ T \ March1929-December1929  Scan159
Proposed modifications for the 20HP and SS starter carburettors.22th Jun 1929West Wittering \ T \ March1929-December1929  Scan160
Suggestions for increasing the stiffness of the 20HP side spare wheel carrier.22th Jun 1929West Wittering \ T \ March1929-December1929  Scan161
Experimental use of a new 20HP auto friction damper flywheel for the 'China' chassis.22th Jun 1929West Wittering \ T \ March1929-December1929  Scan162
Secret memo discussing the adoption of a longer frame with two steering options, 'D' and 'E', and the development of the 'Japan' chassis.24th Jun 1929West Wittering \ T \ March1929-December1929  Scan163
First impressions report on the performance and characteristics of a 20HP Allweather car, chassis 16-G-4.26th Jun 1929West Wittering \ T \ March1929-December1929  Scan164
Suggestions for stiffening the 20HP side spare wheel carrier.26th Jun 1929West Wittering \ T \ March1929-December1929  Scan165
Secret memo regarding a fix for an engine 'fuss or roar' by modifying the carburetter.26th Jun 1929West Wittering \ T \ March1929-December1929  Scan166
Extra oil on engine startup, modifications to 20HP and SS starter carburetters, and carburetter positioning.27th Jun 1929West Wittering \ T \ March1929-December1929  Scan167
Design objectives for SS. Invar strut pistons.27th Jun 1929West Wittering \ T \ March1929-December1929  Scan168
Vehicle performance issues including steering, engine roughness, and carburetter adjustments.28th Jun 1929West Wittering \ T \ March1929-December1929  Scan169
Reducing the offset for the 'JAPAN' hypoid rear axle and correcting a naming error on related schematics.28th Jun 1929West Wittering \ T \ March1929-December1929  Scan170
Proposed changes to the 20HP steering column and pedal positions.29th Jun 1929West Wittering \ T \ March1929-December1929  Scan171
20HP Steering Columns, sending a document copy and two drawings.29th Jun 1929West Wittering \ T \ March1929-December1929  Scan172
Cause of high-speed vibrations in cars due to recent performance increases.1st Jul 1929West Wittering \ T \ March1929-December1929  Scan173
Issues and potential solutions for an SS exhaust system, including noise, cracking, and cooling methods.1st Jul 1929West Wittering \ T \ March1929-December1929  Scan174
The requirements for purchasing a La Salle car for testing its synchro-mesh gear, clutch, and engine.1st Jul 1929West Wittering \ T \ March1929-December1929  Scan175
Rectifying an unpleasant cracking noise from the SS exhaust system.2nd Jul 1929West Wittering \ T \ March1929-December1929  Scan176
Delay of a standardisation sheet for Side Wheel Carriers pending test results.8th Jul 1929West Wittering \ T \ March1929-December1929  Scan177
Battery accessibility on the 20HP model for a specific body type.8th Jul 1929West Wittering \ T \ March1929-December1929  Scan178
Design improvement for the Bijur Pump cover to prevent it from flying off under pressure.10th Jul 1929West Wittering \ T \ March1929-December1929  Scan179
Secret memo discussing faults with a Bentley car, specifically a jellied radiator and defective steering.10th Jul 1929West Wittering \ T \ March1929-December1929  Scan180
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