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
Sending a scheme with slight modifications for the J. 3. frame.12th Sep 1931West Wittering \ V \ March1931-September1931  Scan417
Scheme 3341, which modifies the shape of the rear dumb iron, spring shackle, and frame side member.12th Sep 1931West Wittering \ V \ March1931-September1931  Scan418
General construction scheme for the J.3. oil pump, distributor drive, and oil relief unit.12th Sep 1931West Wittering \ V \ March1931-September1931  Scan419
J.3 front engine suspension and radiator mounting.12th Sep 1931West Wittering \ V \ March1931-September1931  Scan420
Design change to the J.3. oil base end filter's suction pipe arrangement.12th Sep 1931West Wittering \ V \ March1931-September1931  Scan421
The 'Peregrine' engine's full-scale drawing (LeC. 2954), its bore size, and a modification to the cylinder and crankcase design.14th Sep 1931West Wittering \ V \ March1931-September1931  Scan422
Alterations to the 'China' crankshaft for future series.9th Sep 1931West Wittering \ V \ March1931-September1931  Scan423
Modifications to the 'China' crankshaft, increasing web width and altering oilway drilling.16th Sep 1931West Wittering \ V \ March1931-September1931  Scan424
Sticking and concentricity of cones in a synchro-mesh gearbox, referencing Buick's lapping instructions.19th Sep 1931West Wittering \ V \ March1931-September1931  Scan425
Recommendation to trial a bronze stirrup to reduce friction in a gear mechanism.19th Sep 1931West Wittering \ V \ March1931-September1931  Scan426
Sending a revised quarter-scale layout and skeleton specification for the Peregrine 2 chassis.19th Sep 1931West Wittering \ V \ March1931-September1931  Scan427
Frame stiffness, torsional rigidity, and engine mounting, comparing approaches with Packard and Lancia.19th Sep 1931West Wittering \ V \ March1931-September1931  Scan428
Specification sheet for the Peregrine 2 (Revised) vehicle layout.19th Sep 1931West Wittering \ V \ March1931-September1931  Scan429
Specification sheet for vehicle components, coachwork, and suggested body styles.19th Sep 1931West Wittering \ V \ March1931-September1931  Scan430
Making the revised Peregrine 2 chassis suitable for modern coachwork with a new six light saloon body.19th Sep 1931West Wittering \ V \ March1931-September1931  Scan431
J.3. crankcase cover, its associated dynamo, water pump suspension, and drive coupling.21th Sep 1931West Wittering \ V \ March1931-September1931  Scan432
Standardization of front spring pin diameters to reduce the multiplicity of parts.21th Sep 1931West Wittering \ V \ March1931-September1931  Scan433
Alternative designs for the rear axle tube and brake gear.23th Sep 1931West Wittering \ V \ March1931-September1931  Scan434
Scheme for a 'Locomotive Type Drake' for a J.3 model, being sent for storage.23th Sep 1931West Wittering \ V \ March1931-September1931  Scan435
J. 3. Valve Rocker Calculation of Lift.23th Sep 1931West Wittering \ V \ March1931-September1931  Scan436
Problem with the float for twin carburetters being too heavy and instructions for alterations.24th Sep 1931West Wittering \ V \ March1931-September1931  Scan437
Successful development of a new synchromesh gearbox with a silent 3rd gear.26th Sep 1931West Wittering \ V \ March1931-September1931  Scan438
Imperative use of flexible springs and adjustable shock dampers.26th Sep 1931West Wittering \ V \ March1931-September1931  Scan439
Modifications to the 20/25 balance weights for existing forgings to reduce stress.26th Sep 1931West Wittering \ V \ March1931-September1931  Scan440
Design of a J.3. oil level indicator for use on the Peregrine engine.26th Sep 1931West Wittering \ V \ March1931-September1931  Scan441
Letter about a blueprint for crankshaft and crankcase modifications for a starter motor.26th Sep 1931West Wittering \ V \ March1931-September1931  Scan442
Change in the battery and suspension arrangement for the 20/25 model.26th Sep 1931West Wittering \ V \ March1931-September1931  Scan443
Conclusions on car engine performance, focusing on valve timing, cam design, and lift.28th Sep 1931West Wittering \ V \ March1931-September1931  Scan444
Riding qualities of motor cars, focusing on springs and controllable dampers.28th Sep 1931West Wittering \ V \ March1931-September1931  Scan445
Proposal for improving ride quality using a dual-valve damper system with a replenishing pipe.28th Sep 1931West Wittering \ V \ March1931-September1931  Scan446
Conclusions on balance weights, flywheel vibrations, and crankchamber deflections.28th Sep 1931West Wittering \ V \ March1931-September1931  Scan447
Carburettor trials and future development plans for various designs, including up-draught and down-draught types.28th Sep 1931West Wittering \ V \ March1931-September1931  Scan448
Suggestion and cost-benefit of using Austenitic steel for car cylinder liners.28th Sep 1931West Wittering \ V \ March1931-September1931  Scan449
Dispatch of drawings for a redesigned J.3 crankcase and an attached print for the dynamo drive and lubrication.28th Sep 1931West Wittering \ V \ March1931-September1931  Scan450
Prints for a crankcase, detailing the oil pump, suspension, and starter motor.29th Sep 1931West Wittering \ V \ March1931-September1931  Scan451
Modifications and improvements to the engine cooling system, including shutters, radiator, and louvres.1st Oct 1930West Wittering \ V \ October1930-February1931  Scan001
Various schemes and problems related to gearbox design.1st Oct 1930West Wittering \ V \ October1930-February1931  Scan002
Comparison and critique of various gearbox designs, including epicyclic, Wilson, Salerni, and spool gears.1st Oct 1930West Wittering \ V \ October1930-February1931  Scan003
Confidential memo discussing car body booming issues, the potential of all-steel bodies, and comparisons to American manufacturers.1st Oct 1930West Wittering \ V \ October1930-February1931  Scan004
Confidential memo detailing solutions for crankshaft vibration in the 25HP engine at high speed.1st Oct 1930West Wittering \ V \ October1930-February1931  Scan005
Conference report outlining the accuracy limits and specifications for a vehicle subframe.2nd Oct 1930West Wittering \ V \ October1930-February1931  Scan006
Specifications and procedures for chassis, subframe, and body assembly.2nd Oct 1930West Wittering \ V \ October1930-February1931  Scan007
Suitability of French Marchel headlamps over Lucas lamps, in light of a new French law.2nd Oct 1930West Wittering \ V \ October1930-February1931  Scan008
Outlining the objectives and current status of various vehicle improvements.22th Oct 1930West Wittering \ V \ October1930-February1931  Scan009
Visit to the Pressed Steel Body Co. to investigate three different types of all-steel body construction.4th Oct 1930West Wittering \ V \ October1930-February1931  Scan010
Investigation into all-steel car bodies, specifically the Budd system, for potential use on the 25HP model.10th Oct 1930West Wittering \ V \ October1930-February1931  Scan011
Modifications to the 'C' steering system to improve body space and comfort.10th Oct 1930West Wittering \ V \ October1930-February1931  Scan012
Alternative layouts for the N. 2 Series instrument board on different chassis types.10th Oct 1930West Wittering \ V \ October1930-February1931  Scan013
Modifications to the scuttle of a body to fit a revised radiator and bonnet on a Phantom II.10th Oct 1930West Wittering \ V \ October1930-February1931  Scan014
Cover memo for an enclosed print showing the 25HP clutch.11th Oct 1930West Wittering \ V \ October1930-February1931  Scan015
The construction of a specimen 3rd speed epicyclic train for testing a revised gearbox.14th Oct 1930West Wittering \ V \ October1930-February1931  Scan016
Requesting a progress update on experiments related to pedal stems and bonnets.10th Nov 1930West Wittering \ V \ October1930-February1931  Scan017
Proposal for a new louvred bonnet design, scheme 3153, with improvements over the 14-EX model.11th Oct 1930West Wittering \ V \ October1930-February1931  Scan018
Instructions to stop the 25HP flywheel job and modify the bonnet louvres.11th Oct 1930West Wittering \ V \ October1930-February1931  Scan019
Short memo regarding sending drawings (LeCs. 2830/1) for the 25HP Clutch.13th Oct 1930West Wittering \ V \ October1930-February1931  Scan020
Revised epicyclic 3rd speed gearbox and associated drawings.13th Oct 1930West Wittering \ V \ October1930-February1931  Scan021
Improvements to radiators and bonnets, including square tubes, overflow valves, and bonnet vents.14th Oct 1930West Wittering \ V \ October1930-February1931  Scan022
Schemes for a revised epicyclic 3rd speed gearbox.16th Oct 1930West Wittering \ V \ October1930-February1931  Scan023
Modification to the P.2. Bonnet side panel to create a continuous body line, addressing criticisms from Sales and coachbuilders.16th Oct 1930West Wittering \ V \ October1930-February1931  Scan024
Confidential memo on Motor Show impressions, discussing design costs, manufacturing efficiency, and supplier quality.20th Oct 1930West Wittering \ V \ October1930-February1931  Scan025
Engine performance, future design considerations including a 12-cylinder engine, and proposals for future car models.20th Oct 1930West Wittering \ V \ October1930-February1931  Scan026
Engine mounting options, superchargers, gearboxes, and the 25HP model.20th Oct 1930West Wittering \ V \ October1930-February1931  Scan027
Reduction of flywheel vibration on a 25HP engine.20th Oct 1930West Wittering \ V \ October1930-February1931  Scan028
Cost-saving measures by discontinuing part number stamping and simplifying drawing dimensions.23th Oct 1930West Wittering \ V \ October1930-February1931  Scan029
Modifications to the wheels of the Phantom II.24th Oct 1930West Wittering \ V \ October1930-February1931  Scan030
Scheme 3157 for vacuum control and operation of top and 3rd gear jaw clutches, which supersedes scheme 3151.25th Oct 1930West Wittering \ V \ October1930-February1931  Scan031
Criticisms and potential improvements for bonnets and radiators.25th Oct 1930West Wittering \ V \ October1930-February1931  Scan032
Design elements including the crankcase oil filler cap, mascot, and bonnet louvres.25th Oct 1930West Wittering \ V \ October1930-February1931  Scan033
Revised drawing for an epicyclic third speed gearbox, noting a design change and a delay with previous prints.25th Oct 1930West Wittering \ V \ October1930-February1931  Scan034
Instrument board layout for 'C' and 'D' type steering.27th Oct 1930West Wittering \ V \ October1930-February1931  Scan035
Thermostat modifications and their effect on engine performance and petrol consumption.27th Oct 1930West Wittering \ V \ October1930-February1931  Scan036
Log of temperature readings from a 25EX thermostat test.20th Oct 1930West Wittering \ V \ October1930-February1931  Scan037
Test results for a 24 EX thermostat, including temperature readings and radiator shutter operation points.20th Oct 1930West Wittering \ V \ October1930-February1931  Scan038
Test report for a thermostat marked 'A', with temperature readings and radiator shutter operation points.20th Oct 1930West Wittering \ V \ October1930-February1931  Scan039
Operating temperatures for the 25EX Thermostat.21th Oct 1930West Wittering \ V \ October1930-February1931  Scan040
Hand-drawn sketch of a tube/pipe cross-section with a circled feature, alongside handwritten valve timing notes.5th Nov 1930West Wittering \ V \ October1930-February1931  Scan041
Acceleration test results for vehicle 19EX at water temperatures of 60°C and 70°C.5th Nov 1930West Wittering \ V \ October1930-February1931  Scan042
Modification to the jaw clutches in the revised epicyclic third speed gearbox.29th Oct 1930West Wittering \ V \ October1930-February1931  Scan043
Specifications for a 'Car for R', covering body track, bonnet, chassis, lamps, and delivery schedule for France.29th Oct 1930West Wittering \ V \ October1930-February1931  Scan044
Superseded internal memo indicated by a 'RECEIVED' stamp and handwritten notes.31th Oct 1930West Wittering \ V \ October1930-February1931  Scan045
Modification to the 1st speed dogs for the all-epicyclic gearbox, scheme 3159.29th Oct 1930West Wittering \ V \ October1930-February1931  Scan046
New untarnishable metal called 'Silveroid' for body fittings, noting its use by Crossley's.29th Oct 1930West Wittering \ V \ October1930-February1931  Scan047
Required design features for future 25HP models regarding axle, springing, engine mounting, and bodywork.29th Oct 1930West Wittering \ V \ October1930-February1931  Scan048
Vehicle ride characteristics, performance, and body design considerations.30th Oct 1930West Wittering \ V \ October1930-February1931  Scan049
Proposal for a combined direct, electric, and mechanically geared change gear system.30th Oct 1930West Wittering \ V \ October1930-February1931  Scan050
List of required accessories and specifications for car 27-EX.30th Oct 1930West Wittering \ V \ October1930-February1931  Scan051
The revised Epicyclic 3rd speed gearbox and the experimental arrangement of its oil pump and lubrication jet.31th Oct 1930West Wittering \ V \ October1930-February1931  Scan052
Modifications and specifications for the Epicyclic 3rd speed gearbox.11th Nov 1930West Wittering \ V \ October1930-February1931  Scan053
Various novel gear changing mechanisms and transmission technologies.11th Mar 1930West Wittering \ V \ October1930-February1931  Scan054
Evaluation of various gearbox and transmission schemes, including historical attempts and future plans.11th Mar 1930West Wittering \ V \ October1930-February1931  Scan055
The design of a new 4-speed gearbox, detailing its semi-silent, easy-change features.13th Nov 1930West Wittering \ V \ October1930-February1931  Scan056
Three schemes for the revision of the 25HP 'Japan' engine.13th Nov 1930West Wittering \ V \ October1930-February1931  Scan057
Proposed re-arrangement of the 25HP frame, cross members, and brake gear per scheme 3162.1st Nov 1930West Wittering \ V \ October1930-February1931  Scan058
Modifications and additions to a revised epicyclic third speed gearbox.14th Nov 1930West Wittering \ V \ October1930-February1931  Scan059
Letter to Park Ward & Co. detailing the final finish and interior specifications for Sir Henry Royce's car, 27EX.5th Nov 1930West Wittering \ V \ October1930-February1931  Scan060
Car interior fittings and design specifications, including sketches.6th Nov 1930West Wittering \ V \ October1930-February1931  Scan061
Chassis 27-EX for Sir Henry Royce, coordinating body mounting with Park Ward and component fitting.6th Nov 1930West Wittering \ V \ October1930-February1931  Scan062
Revised epicyclic 3rd speed gearbox and the feasibility of fitting an 8.5' fabric coupling.7th Nov 1930West Wittering \ V \ October1930-February1931  Scan063
Revisions to the epicyclic 3rd speed gearbox and modifications to the servo and brake arrangements.10th Nov 1930West Wittering \ V \ October1930-February1931  Scan064
From DA to HS requesting remarks on criticisms regarding reduced controls on the steering column.7th Nov 1930West Wittering \ V \ October1930-February1931  Scan065
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