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
Proposal for a sliding pad for existing Phantom rear springs to avoid increasing spring stock.13th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan099
Drawings and design changes for the 'SS' Exhaust System.14th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan100
Use of subframes and the production of experimental car bodies for models 18-EX and 19-EX.14th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan101
Distribution board fitted with a green lamp and related wiring.15th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan102
20HP car returned to the works, discussing paint issues, window vibration, and the effect of rubber engine mountings on frame deflection.17th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan103
Providing feedback on the Barkerlite body, balloon tyres, and overall quality of the 20HP model.17th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan104
From 'R.' discussing the replacement and modification policy for front road springs on the 20HP model.18th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan105
From DA to HS querying the weight saving figure for the 'SS' engine unit gearbox.18th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan106
The arrangement of electrical circuits, fuses, and a proposed switchbox and ignition test.18th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan107
Performance of a cross web piston with 4 pinned rings for a 20HP engine.19th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan108
Stating a tested engine unit is ready for an urgently needed chassis, advising against delays for modifications.19th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan109
Decision for a new, more robust arrangement of electrical wiring circuits.19th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan110
Technical memorandum detailing settings for a dual magneto and battery ignition system, including advance angles and synchronisation.9th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan111
Design and fitment of a heat shield for the 'SS' exhaust system.20th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan112
Outlining safety concerns with non-standard front wheel brakes and criticizing the Repair Department for unauthorized fittings.21th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan113
Modifications to the 'SS' rear axle to accommodate a rebuilt wire wheel.21th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan114
Experimental fault testing on car electrical equipment and a specific spotlight earthing issue.21th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan115
Gearbox and back axle ratios, supercharging, and engine improvements.21th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan116
Design and benefits of a new front axle for 'SS' models.21th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan117
Modifications to the 'SS' front axle under scheme 2718.21th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan118
Revisions to the electrical installation and wiring diagram for chassis EAC.10.22th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan119
Questioning if a non-inductive resistance across the dynamo field would stop sparking on the charging switch, and requesting an experimental observation.22th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan120
Mr. Royce's views on bonnets for the Phantom and 'SS' models.24th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan121
Revised scheme for electrical switches to prevent sparking in the dynamo circuit.25th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan122
Alterations to the scuttle of a Sedanca for chassis 14-G-4 by coachbuilder Hooper's.27th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan123
The state of design work for an 'SS' chassis, detailing exceptions for road testing and suggested improvements.28th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan124
Scheme 2727, detailing minor dimensional changes to the 'SS' Radiator.28th Sep 1928West Wittering \ T \ 2July1928-December1928  Scan125
Car springing, weight distribution, and ride comfort issues.1st Oct 1928West Wittering \ T \ 2July1928-December1928  Scan126
Road spring design, comparing cantilever and semi-elliptic springs and the shape of plate ends.2nd Oct 1928West Wittering \ T \ 2July1928-December1928  Scan127
Outlining modifications to the ignition, charging, and magneto contacts for a switchbox, referencing drawing LeC. 2597.2nd Oct 1928West Wittering \ T \ 2July1928-December1928  Scan128
Instructions for mounting the Accessory Distribution Board, referencing drawing LeC. 2598.2nd Oct 1928West Wittering \ T \ 2July1928-December1928  Scan129
Alterations to the 20HP chassis switchbox for a green lamp installation.3rd Oct 1928West Wittering \ T \ 2July1928-December1928  Scan130
Redrawn blueprint for a modified switchbox wiring diagram.3rd Oct 1928West Wittering \ T \ 2July1928-December1928  Scan131
Modifications to the 'SS' gearbox undershield.3rd Oct 1928West Wittering \ T \ 2July1928-December1928  Scan132
The dispatch of prints for engine controls and noting outstanding mechanisms.6th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan133
Valve clearance issues caused by settled cylinder gaskets, and the recommended practice for reusing them.10th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan134
Method for providing central lubrication to the pendulum lever ball end, referencing drawing N. sch. 2737.10th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan135
Lightened clutch and flywheel serrated universal joint, suggesting a stainless steel plug or cadmium plating.10th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan136
Trial of bifocal dimming bulbs for headlamps.10th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan137
Suggestion on car engine mounting, using varied rubber flexibility to reduce high-speed wobbles.11th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan138
Four potential methods for improving vehicle acceleration.16th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan139
Request for the best form of positive blower (supercharger) for a 20HP engine, detailing specific performance and design requirements.16th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan140
Engine valve oiling issues on the 12-G-4 model causing poor performance at slow speeds.16th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan141
Piston design choices, including ring types, overoiling, skirt flexibility, and grinding specifications.16th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan142
Piston features and ring dimensions for Phantom and 20HP chassis.17th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan143
Suggesting improvements to the tool kit, side lamps, and windscreen wiper for Phantom and 'SS' models.17th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan144
Engine compression experiments, torque reactions, and potential improvements to carburettors and chassis.17th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan145
Proposed changes to side and rear wheel carriers for 20HP vehicles.17th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan146
Brief status update on the controls for the 'SS' Chassis X7240.17th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan147
Expressing concern that the 'SS' engine development has been sidelined by aero engine work.17th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan148
Wheel-arch clearances for the 18.EX and 'SS' car models.18th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan149
Clearance for the 'SS' radiator and fan, and a modification to the starting handle bracket.18th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan150
Revisions to the 'SS' battery suspension design.18th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan151
Oil supply to valves and a clutch shudder issue in Phantom & 20HP cars.19th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan152
Incorrect heelboard length and requesting a new sheet metal version based on correct schematics.20th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan153
New schemes for the arrangement of a luggage box and two wheels at the rear for model 18-EX.20th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan154
From 'R' querying a delay in progressing with a longer duration cam for the 'SS' engine.20th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan155
Chromium plating issues on nickel silver and specifications for parts on two 'SS' models.20th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan156
Urgent testing of a damped pendulum lever on a car to expedite results.20th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan157
Effect of rear-end weight distribution and body length on car riding and steering qualities.20th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan158
Manufacturing process and design improvements for road springs.20th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan159
From 'R' expressing anxiety over the slow progress of car improvements and outlining a new programme.20th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan160
Drawings for engine controls, including the governor, magneto, and ignition synchronising mechanisms.20th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan161
Updating the status and production schedule for various experimental car bodies.22th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan162
Proposal for a main grease drain for side-by-side brakes, involving alterations to the central spider casting and shoe locating discs for the Phantom.25th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan163
Design, production and supply issues of Phantom wing stays with coachbuilders.23th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan164
Torque reactions and vibrations in relation to a Chrysler Spring Drive.24th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan165
Letter to A. W. Claremont discussing options for improving acceleration, including superchargers and freewheels.24th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan166
Discussion of gearbox designs, including a combined freewheel/jaw clutch and an alternative epicyclic gear system.24th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan167
Letter from F.H. Royce discussing alternative gearbox arrangements, focusing on epicyclic units for silent operation.24th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan168
Modified front axle for 'INDIA 4', detailing schemes, measurements, and required modifications.24th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan169
Magneto and Throttle Governor Controls, referencing drawing LeC. 2606.25th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan170
Chasing progress on a drawing for 20HP carburettor alterations after about one month.26th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan171
Programme of improvements for the 20HP model, outlining changes in three phases.26th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan172
Delays and issues with car improvement progress, citing aero work and material stock problems.26th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan173
Responding to a query about 'SS' ignition wire tubing and materials.26th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan174
Part numbers and status for water connections, oil fittings, magneto controls, and undershields for the 'SS' chassis.27th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan175
Scheme for 'SS' floorboards over the clutch pit.27th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan176
Secret memo outlining proposals for luggage and wheel accommodation at the rear of the 'SS' model.27th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan177
Sending scheme 2752, a drawing for the 18-EX instrument board, to coachbuilders.31th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan178
Improvement to the front axle lubrication system using an air vessel to inject oil.31th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan179
Alternative arrangements for rear-mounted spare wheels and luggage grids.31th Oct 1928West Wittering \ T \ 2July1928-December1928  Scan180
Modifications to the front springs, side steering tube, and frame geometry for the 'India 4' model.11th Nov 1928West Wittering \ T \ 2July1928-December1928  Scan181
Scheme 2755 for dashboard arrangement to maximize the height of the autovac tank.11th Nov 1928West Wittering \ T \ 2July1928-December1928  Scan182
Brief cover note for drawing Lec. 2607 regarding a 20HP Dynamo Drive.1st Nov 1928West Wittering \ T \ 2July1928-December1928  Scan183
Two proposals for drilling front axle pivot pins to store reserve oil for centralised chassis lubrication.3rd Nov 1928West Wittering \ T \ 2July1928-December1928  Scan184
Required size reduction for 2 BA square collar nuts from .350 to .343.11th Jun 1928West Wittering \ T \ 2July1928-December1928  Scan185
Evaluation of a Talbot car with a freewheel back axle and the resulting conclusions about the technology.6th Nov 1928West Wittering \ T \ 2July1928-December1928  Scan186
Querying the status of a new design for 'SS' & G.4. bonnet fasteners and locks.6th Nov 1928West Wittering \ T \ 2July1928-December1928  Scan187
Proposing the use and stocking of steel underframes to improve coachbuilt bodies, particularly for the upcoming 'SS' Phantom model.7th Nov 1928West Wittering \ T \ 2July1928-December1928  Scan188
Alterations to the rear hub and brake drum for the India 4 rear axle, referencing scheme 2757.7th Nov 1928West Wittering \ T \ 2July1928-December1928  Scan189
The fitment of dipping lamps to various experimental car models.7th Nov 1928West Wittering \ T \ 2July1928-December1928  Scan190
Introduction and features of the new 'SS' and 'G. 4' chassis.7th Nov 1928West Wittering \ T \ 2July1928-December1928  Scan191
Implementation of modifications and the necessity of getting chassis improvements into production by midsummer 1929.7th Nov 1928West Wittering \ T \ 2July1928-December1928  Scan192
Methods to improve vehicle acceleration, including engine power and gearbox design.7th Nov 1928West Wittering \ T \ 2July1928-December1928  Scan193
Improved epicyclic unit gearbox design for silent operation and easier gear changes.8th Nov 1928West Wittering \ T \ 2July1928-December1928  Scan194
Confirmation of a wire suggesting an alteration to SS valve springs by increasing coil clearance.8th Nov 1928West Wittering \ T \ 2July1928-December1928  Scan195
Modifications to the 'SS' Front Axle, focusing on the mud excluder and brake geometry.8th Nov 1928West Wittering \ T \ 2July1928-December1928  Scan196
Scheme for centralised chassis lubrication involving air vessels for the front and rear axles.9th Nov 1928West Wittering \ T \ 2July1928-December1928  Scan197
Design improvements for the Enots petrol filter (part X4037), specifically its excessive weight and incorrect bolting.9th Nov 1928West Wittering \ T \ 2July1928-December1928  Scan198
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