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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Potential names for a new car model ('No.3') and proposed technical changes to the 15HP chassis ('J.3').14th Oct 1931Box 5a \ 1  01-page192
Internal codename 'Japan 5' for a new model, and the timing for creating a prototype.1st Aug 1921Box 5a \ 1  01-page193
The new front engine and radiator support, with the design changed due to a deeper radiator.1st Aug 1931Box 5a \ 1  01-page194
Potential performance improvements for the 25 HP model to increase sales.1st Aug 1931Box 5a \ 1  01-page195
Bench tests and modifications to improve the performance of a 25 HP power unit.1st Aug 1931Box 5a \ 1  01-page196
Performance and handling of a car during high-speed tests, noting lap times, engine roughness, and component effectiveness.5th Aug 1931Box 5a \ 1  01-page197
Blueprint graph of engine performance test results from Brooklands.1st Aug 1931Box 5a \ 1  01-page198
Graph comparing the performance and back pressure of five different exhaust systems against engine RPM.11th Aug 1931Box 5a \ 1  01-page199
Brooklands performance test data for a 12 G IV Close Coupled Four Seater, comparing various car and engine configurations.14th Aug 1931Box 5a \ 1  01-page200
Assessment of the appearance and production suitability of a 25HP car on its way to France.1st Jan 1931Box 5a \ 1  01-page201
Acceleration and hill climbing tests to confirm the improved performance of a 25 HP car.19th Aug 1931Box 5a \ 1  01-page202
Low speed performance tests for hill climbs and acceleration comparing different carburettor and silencer setups.15th Aug 1931Box 5a \ 1  01-page203
Proposing tests on a 25 HP high performance car at Brooklands.24th Aug 1931Box 5a \ 1  01-page204
Dispatch of drawing LeC. 2938 for the J.3. crankcase, cylinder block, and crankshaft.1st Aug 1931Box 5a \ 1  01-page205
Test report on a modified 25 HP car at Brooklands race track.29th Mar 1931Box 5a \ 1  01-page206
Performance comparison chart of a 25 HP car's lap speeds at Brooklands Track with various engine and axle configurations.26th Aug 1931Box 5a \ 1  01-page207
Bar chart comparing the high-speed performance of a 25 HP car with different engine, carburetter, and axle configurations at Brooklands track.26th Aug 1931Box 5a \ 1  01-page208
Results of experiments on the 25 HP car and plans for incorporating new features.29th Aug 1931Box 5a \ 1  01-page209
Results of experimental work to improve the performance and smoothness of the 20/25 HP car.1st Sep 1931Box 5a \ 1  01-page210
Delay to the 25 HP experimental car 18-S4 due to fitting an improved synchro-mesh gearbox.2nd Sep 1931Box 5a \ 1  01-page211
Progress report on the J.3. project, detailing cost-saving design improvements and steering adjustments.3rd Sep 1931Box 5a \ 1  01-page212
Technical memo outlining required improvements for 25HP and 45HP car models.7th Sep 1931Box 5a \ 1  01-page213
Engine performance trade-offs, prioritizing reliability over maximum speed and horsepower.7th Sep 1931Box 5a \ 1  01-page214
Technical memo discussing engine performance specifications and modifications for the Phantom II.7th Sep 1931Box 5a \ 1  01-page215
Material change from aluminium to cast iron for the Peregrine J.111 crankcase and cylinder block.15th Sep 1931Box 5a \ 1  01-page216
Design policy for the 'Peregrine' project, comparing scaled-down vs. shared components from the J.3 model.15th Sep 1931Box 5a \ 1  01-page217
The standardization of parts for the 20 HP Chassis 'T' Series.25th Sep 1931Box 5a \ 1  01-page218
Proposed improvements and new parts for the 25 HP car model.1st Oct 1931Box 5a \ 1  01-page219
Concluding remarks about implementing improvements on a 25 HP car following satisfactory tests.14th Oct 1931Box 5a \ 1  01-page220
Design options and cost for a front apron on a 'Y' Series chassis.14th Oct 1931Box 5a \ 1  01-page221
Inquiry about the readiness of a component for a 10,000-mile test.14th Oct 1931Box 5a \ 1  01-page222
Road tests for a car with new features, including a modified crankshaft, flywheel, and exhaust valves.14th Oct 1931Box 5a \ 1  01-page223
Confirmation of a telephone conversation regarding modifications to frame width for Phantom II and Peregrine, and a discussion on wheel and tyre specifications.19th Oct 1931Box 5a \ 1  01-page224
Tyre dimensions, their impact on chassis height and steering, and the provision of blueprints.19th Oct 1931Box 5a \ 1  01-page225
Approval process for new part drawings for the Japan 3 and Peregrine I projects.22th Oct 1931Box 5a \ 1  01-page226
Requesting an update on the completion timeline for the Japan 3 Engine Section design work.1st Oct 1941Box 5a \ 1  01-page227
Delays on the 'Japan 3' engine project and a revised completion target of Christmas.26th Oct 1931Box 5a \ 1  01-page228
Holding production on a list of experimental parts for the 'T' series.29th Oct 1931Box 5a \ 1  01-page229
Alterations for the second half of the 25 HP 'T' series and suggesting a conference to review the changes.29th Oct 1931Box 5a \ 1  01-page230
From 'R' discussing design improvements and considerations for the 'Japan 1 Unit' engine.30th Oct 1931Box 5a \ 1  01-page231
Confirming the production of an additional 25 chassis for the 25 HP 'T' series.2nd Nov 1931Box 5a \ 1  01-page232
Modifications and proposed standard items for the 20/25 HP Chassis T-Series.3rd Nov 1931Box 5a \ 1  01-page233
Listing six new parts or alterations for the second half of the 20/25 Chassis 'T' Series.4th Nov 1931Box 5a \ 1  01-page234
Various component failures in a 19-G4 model car at 15,000 miles.1st Nov 1931Box 5a \ 1  01-page235
Blueprint Lec.2969 for fan drive, exhaust, and water connections, noting uncertainty about front axle and steering tube positions.17th Nov 1931Box 5a \ 1  01-page236
Cover memo for a Fitting Department report on the first 'T' series 20/25 HP chassis.9th Nov 1931Box 5a \ 1  01-page237
List of ten issues and required modifications for the 20/25 HP 'T' Series, 2nd 100 vehicle.5th Nov 1931Box 5a \ 1  01-page238
Issues with the radiator suspension on ball pins, specifically the length of the centre distance piece.5th Nov 1931Box 5a \ 1  01-page239
Progress report on the design and development of the J.S. engine.21th Nov 1931Box 5a \ 1  01-page240
Car 19-G4 after 15,000 miles, detailing component issues and modifications.10th Nov 1931Box 5a \ 1  01-page241
Extract from a memo on car design work, specifically concerning a new rubber support for the radiator and engine front end.10th Nov 1931Box 5a \ 1  01-page242
On car design work, discussing issues with petrol gauges, ignition coils, and exhaust pipes.10th Nov 1931Box 5a \ 1  01-page243
Pump connections, engine mounting, and carburetter design for the L.S. & Peregrine.14th Nov 1931Box 5a \ 1  01-page244
Modifications to a 25 HP car for Lord Cholmondeley and its performance trial results.14th Nov 1931Box 5a \ 1  01-page245
List of modifications and improvements for the 20/25 chassis.7th Nov 1931Box 5a \ 1  01-page246
Status update memo on various automotive components and planned standardizations.7th Nov 1931Box 5a \ 1  01-page247
Unsuitability of the 20HP and J.1 engines for speed and supercharging programmes.26th Nov 1931Box 5a \ 1  01-page248
Design and layout for the rear end of car J.3.30th Nov 1931Box 5a \ 1  01-page249
The production of 100 20/25 HP 'U' Series chassis, numbers 3801-3900.3rd Dec 1931Box 5a \ 1  01-page250
Production schedule for the 20/25 HP Chassis 'U' Series (3801 - 3900).31th Dec 1931Box 5a \ 1  01-page251
Calculations and diagrams for an improved camshaft for China.3rd Dec 1931Box 5a \ 1  01-page252
Driving seat positions, pedals, and levers for the J.3. model.3rd Dec 1931Box 5a \ 1  01-page253
Cover note for scheme 3390, the general arrangement of J. 3., requesting blueprints and confirming printing feasibility.8th Dec 1931Box 5a \ 1  01-page254
Specifications for a sportier 25 HP car, with suggestions for modifications to increase speed.19th Dec 1931Box 5a \ 1  01-page255
The condition of an 18-GIV engine unit after a 10,000-mile test, detailing the state of various components.21th Dec 1931Box 5a \ 1  01-page256
Findings on the flywheel, clutch, and various chassis components.1st Dec 1931Box 5a \ 1  01-page257
Condition report on vehicle components, identifying an oil leak in the rear axle and wear issues with the pedals and gearbox.1st Dec 1931Box 5a \ 1  01-page258
Blueprint of a 25HP Rear Brake Actuating Shaft.17th Dec 1931Box 5a \ 1  01-page259
Table of cylinder bore measurements showing diameter and wear after 15,000 miles.17th Dec 1931Box 5a \ 1  01-page260
Blueprint diagram illustrating a required alteration to the exhaust valve seating to prevent hammering.29th Nov 1931Box 5a \ 1  01-page261
Photograph displaying two rows of engine bearing shells for examination.25th Jan 1931Box 5a \ 1  01-page262
Review of the 25 HP model's position and proposals for performance improvements and developments.25th Jan 1931Box 5a \ 1  01-page263
Comments on the performance of the experimental car 18.G.4 after a 10,000-mile test in France.28th Dec 1931Box 5a \ 1  01-page264
Faults found on a vehicle, including issues with brakes, clutch, radiator, and electrics.29th Dec 1931Box 5a \ 1  01-page265
List of specifications and modifications for the gearbox, propeller shaft, and other chassis components.29th Dec 1931Box 5a \ 1  01-page266
Modifications for the final 25 chassis in the 'T' series.29th Dec 1931Box 5a \ 1  01-page267
Proposed modifications for a Continental 20/25 engine, including wheels, axle, and compression ratio.1st Dec 1931Box 5a \ 1  01-page268
10,000-mile test, recommending a new chassis for production based on performance and sales potential.30th Aug 1931Box 5a \ 1  01-page269
Requesting an opportunity to test car 18-G-4 after modifications, before its return to France.31th Dec 1931Box 5a \ 1  01-page270
Instruction to order material for 100 'U' series 20/25 HP chassis based on features from the 'T' series.31th Dec 1931Box 5a \ 1  01-page271
Proposed modifications for the 20 HP model, to be called India 3.22th Jul 1927Box 5a \ 2  02-page001
Progress on a frame and engine crankshaft for the next 20 HP car intended for trial in France.1st Sep 1927Box 5a \ 2  02-page002
Modifications for the 20 HP car, testing new models in France and rebranding the 40/50.21th Oct 1927Box 5a \ 2  02-page003
Confirming the preparation for a 10,000-mile test on a 20 HP chassis with new steering.11th Nov 1927Box 5a \ 2  02-page004
Instructions for preparing a 20 HP car for a 10,000-mile test in France, detailing proposed modifications.14th Nov 1927Box 5a \ 2  02-page005
List of twenty features to be incorporated into a chassis for the 'India 3 - 10,000 Miles Test in France'.11th Nov 1927Box 5a \ 2  02-page006
Continued list of engine component specifications and modifications.12th Mar 1927Box 5a \ 2  02-page007
Introduction of an 'X' shaped 4th cross member for the 20 HP car frame and the resulting modifications required.12th Mar 1927Box 5a \ 2  02-page008
Outlining required improvements for the 20 HP India 3 model.10th Mar 1928Box 5a \ 2  02-page009
List of nine proposed modifications for the 20 HP India 3 Next 10,000 Miler Engine.1st Mar 1928Box 5a \ 2  02-page010
Implementation of central oiling and oil-retaining universal joints on a 20 HP car model.3rd Mar 1928Box 5a \ 2  02-page011
Frame modifications and required features for the 20 HP India 3 model.5th Mar 1928Box 5a \ 2  02-page012
Arrangements for sending a 20 HP car, 14-G-4, to France.17th Dec 1923Box 5a \ 2  02-page013
Arrangements and conditions for a 10,000-mile test on the 'SS' model, referencing a previous fatal accident.17th Dec 1928Box 5a \ 2  02-page014
Continuation page of a document discussing the potential repetition of a test.17th Dec 1928Box 5a \ 2  02-page015
Running schedule for the 18-EX vehicle, detailing daily mileage and activities.17th Dec 1928Box 5a \ 2  02-page016
Schedule of running for a 20 HP vehicle, detailing dates, a route, and mileage.18th Dec 1928Box 5a \ 2  02-page017
Letter discussing the running schedule and transport arrangements for a 20 HP car to Chateauroux, France.18th Dec 1928Box 5a \ 2  02-page018
Arrangements for a 20 HP car to arrive at Le Havre and clear customs.19th Dec 1928Box 5a \ 2  02-page019
Start of a 10,000-mile test for a car at Chateauroux.22th Dec 1928Box 5a \ 2  02-page020


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