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
Lubrication and modifications for the J.4. gearbox and clutch components.16th Jul 1931West Wittering \ V \ March1931-September1931  Scan317
Outlining revisions to the 20/25 radiator design, including changes to matrix depth and suspension centres.20th Jul 1931West Wittering \ V \ March1931-September1931  Scan318
Preliminary specification for an 18HP vehicle, covering engine, chassis, and design choices.20th Jul 1931West Wittering \ V \ March1931-September1931  Scan319
Stiffer washers for friction dampers on a P. 2. Conversion Mounting.20th Jul 1931West Wittering \ V \ March1931-September1931  Scan320
Proposal to use a cylinder head without lips for lower compression engines.20th Jul 1931West Wittering \ V \ March1931-September1931  Scan321
Modifications to the J.4 gearbox, including the universal joint, 3rd motion shaft, and a proposed change to the pendulum lever's construction.20th Jul 1931West Wittering \ V \ March1931-September1931  Scan322
Engine performance improvements related to long duration camshafts and valve timing.21th Jul 1931West Wittering \ V \ March1931-September1931  Scan323
Issues with flywheel vibration and proposing a trial with a thinner flange.21th Jul 1931West Wittering \ V \ March1931-September1931  Scan324
Modifications to the 20/25 servo to fit the J. 4. Gearbox, referencing scheme 3315.21th Jul 1931West Wittering \ V \ March1931-September1931  Scan325
Scheme 3316 for lowered controls, noting potential difficulty with bakelite moulding.23th Jul 1931West Wittering \ V \ March1931-September1931  Scan326
The 13HP specification concerning track width, gear change, and potential for a heavy chassis.23th Jul 1931West Wittering \ V \ March1931-September1931  Scan327
Modifications to the universal joint flange and gearbox to save costs.23th Jul 1931West Wittering \ V \ March1931-September1931  Scan328
Requesting a mock-up of a 'lowered controls' scheme for examination.24th Jul 1931West Wittering \ V \ March1931-September1931  Scan329
Modifications for the J.4. gearbox, specifically the change gear lever, gate, and brake pedal mechanism.24th Jul 1931West Wittering \ V \ March1931-September1931  Scan330
Design specifications for the Japan Cylinder Head and Valve Rockers, referencing drawing LeC. 2929.24th Jul 1931West Wittering \ V \ March1931-September1931  Scan331
Modifications to a P.2 conversion mounting, including a new friction damper design and stiffening brackets.24th Jul 1931West Wittering \ V \ March1931-September1931  Scan332
Complaint letter from F. H. Royce regarding a faulty car clock supplied by Messrs North & Sons Ltd.24th Jul 1931West Wittering \ V \ March1931-September1931  Scan333
Comparing design elements of competitor cars (Buick, Humber, Wizard) against Rolls-Royce's own practices.4th Aug 1931West Wittering \ V \ March1931-September1931  Scan334
Provisional patent and experimental approaches for connecting headlamps via the series winding of a car dynamo.4th Aug 1931West Wittering \ V \ March1931-September1931  Scan335
Potential names for a new car model and design considerations for the J.3. chassis and a 13HP model.14th Aug 1931West Wittering \ V \ March1931-September1931  Scan336
Material suitability and design improvements for piston pins and articulated rod pins.11th Aug 1931West Wittering \ V \ March1931-September1931  Scan337
Confidential sending of 'Peregrine' and Saloon Body layouts.11th Aug 1931West Wittering \ V \ March1931-September1931  Scan338
Modification to the shape of the lower water pipe to improve drainage and prevent ice from damaging the water pump.11th Aug 1931West Wittering \ V \ March1931-September1931  Scan339
Request for more information on proposed changes to the central lubrication system and a front battery suspension failure during a 10,000-mile test in France.12th Aug 1931West Wittering \ V \ March1931-September1931  Scan340
Issues with exhaust valves on the P. 2 model after a 10,000-mile test, comparing old and new designs.13th Aug 1931West Wittering \ V \ March1931-September1931  Scan341
Knocking issue with new plates in reaction dampers and potential solutions.13th Aug 1931West Wittering \ V \ March1931-September1931  Scan342
And comparing various lubricating oils for workshop and toolroom use.13th Aug 1931West Wittering \ V \ March1931-September1931  Scan343
Designing and producing larger damper discs in response to a knocking issue.13th Aug 1931West Wittering \ V \ March1931-September1931  Scan344
Feedback and proposed design changes for the 20/25 model's front and rear aprons.14th Aug 1931West Wittering \ V \ March1931-September1931  Scan345
Pencil sketch of a rear-mounted luggage carrier or toolbox assembly.21th Aug 1931West Wittering \ V \ March1931-September1931  Scan346
Review of the new front engine and radiator support design for the 25HP model.17th Aug 1931West Wittering \ V \ March1931-September1931  Scan347
Frame stiffness and components for the 25HP side wheel carrier.15th Aug 1931West Wittering \ V \ March1931-September1931  Scan348
Side wheel carrier stays for the 25 HP model, discussing issues and proposing a new design.15th Aug 1931West Wittering \ V \ March1931-September1931  Scan349
Lessons learned from a 25HP car, focusing on issues with high center of gravity and flexible springing.15th Aug 1931West Wittering \ V \ March1931-September1931  Scan350
Design and material selection for battery boxes, specifically for the P.2 and 25HP models.17th Aug 1931West Wittering \ V \ March1931-September1931  Scan351
Design and testing of battery boxes for various car models.15th Aug 1931West Wittering \ V \ March1931-September1931  Scan352
The appearance of a 25HP car, including radiator depth and aprons.15th Aug 1931West Wittering \ V \ March1931-September1931  Scan353
Using cooler or salt-cooled valves to improve power on the Phantom II.17th Aug 1931West Wittering \ V \ March1931-September1931  Scan354
Requesting samples of thin lubricating mineral and sperm oil for testing.17th Aug 1931West Wittering \ V \ March1931-September1931  Scan355
Objectives and challenges of balancing crankshafts for different engines.17th Aug 1931West Wittering \ V \ March1931-September1931  Scan356
Design of the J. 3. connecting rod for a 2.125' crankpin.17th Aug 1931West Wittering \ V \ March1931-September1931  Scan357
Request for sketches and information regarding radiator mounting, lubrication systems, and speedometer drive improvements.17th Aug 1931West Wittering \ V \ March1931-September1931  Scan358
Requesting a sketch and design modification for a carburettor mounting.26th Jun 1922West Wittering \ V \ March1931-September1931  Scan359
Engine vibration issues and potential solutions involving balance weights on a 25HP engine.19th Aug 1931West Wittering \ V \ March1931-September1931  Scan360
Performance of the old carburetter and the conditions for considering a new S.U. model.20th Aug 1931West Wittering \ V \ March1931-September1931  Scan361
Relative importance of wind tunnel experiments versus focusing on acceleration, low-speed torque, and weight reduction.20th Aug 1931West Wittering \ V \ March1931-September1931  Scan362
Development and challenges of producing rivetless aluminium bonnets.20th Aug 1931West Wittering \ V \ March1931-September1931  Scan363
Scheme for attaching intermediate half weights to an existing 20/25 crankshaft on the Chrysler principle.20th Aug 1931West Wittering \ V \ March1931-September1931  Scan364
Suggestion for securing knobs to lowered control levers by applying moulding directly.20th Aug 1931West Wittering \ V \ March1931-September1931  Scan365
Notification about modifications to the rear axle centre box under scheme 3326.20th Aug 1931West Wittering \ V \ March1931-September1931  Scan366
Informing Mr. Elliott of all experimental apparatus and results to avoid overlapping work and save resources.21th Aug 1931West Wittering \ V \ March1931-September1931  Scan367
Two different designs for a dynamic balancer and their potential applications.22th Aug 1931West Wittering \ V \ March1931-September1931  Scan368
Designs for a 25.HP Special Touring Saloon body to be built by Park Ward & Co.22th Aug 1931West Wittering \ V \ March1931-September1931  Scan369
Arrangements and special features for a 'U' Series chassis for a Special Touring Saloon.22th Aug 1931West Wittering \ V \ March1931-September1931  Scan370
Design advantages of side-mounted spare wheels for the Continental Touring Saloon P2.22th Aug 1931West Wittering \ V \ March1931-September1931  Scan371
Experiments with rivetless aluminium bonnets, referencing a competitor's design from the Paris Salon.22th Aug 1931West Wittering \ V \ March1931-September1931  Scan372
Requesting a blueprint for a bonnet side panel to fit matching louvres on the scuttle of a 25HP Special Touring Saloon.22th Aug 1931West Wittering \ V \ March1931-September1931  Scan373
Drawing for a scheme of balance weights and a stiffer crank for the 20/25HP model.22th Aug 1931West Wittering \ V \ March1931-September1931  Scan374
Improved exhaust and inlet valves and the potential impact of their increased weight on valve springs.22th Aug 1931West Wittering \ V \ March1931-September1931  Scan375
Issues with steering ball joints on the Phantom model, including spring fatigue and ball diameter.24th Aug 1931West Wittering \ V \ March1931-September1931  Scan376
Requirements and design considerations for 25HP carburettors.25th Aug 1931West Wittering \ V \ March1931-September1931  Scan377
Modifications to a 20/25 gearbox with synchromesh, detailing changes to clear up a difficulty with the rear cross member.26th Aug 1931West Wittering \ V \ March1931-September1931  Scan378
Patent drawings for a Dynamic Balancer.26th Aug 1931West Wittering \ V \ March1931-September1931  Scan379
Modification instruction for a 'U' Series Continental Touring Saloon chassis, changing a cross member dimension.26th Aug 1931West Wittering \ V \ March1931-September1931  Scan380
Design requirements for the 25HP model's rear aprons, including modifications for controls and gauges.27th Aug 1931West Wittering \ V \ March1931-September1931  Scan381
Design, manufacturing, and fitting challenges of rivetless bonnets.25th Aug 1931West Wittering \ V \ March1931-September1931  Scan382
Assessment of balance weights for a 20/25 HP engine and options for crankshaft forgings.27th Aug 1931West Wittering \ V \ March1931-September1931  Scan383
The production, experimental fitting, and design of balance weights for a 25HP engine crankshaft.28th Aug 1931West Wittering \ V \ March1931-September1931  Scan384
Design considerations for a new back axle and rear brakes for the J. 3. model.28th Aug 1931West Wittering \ V \ March1931-September1931  Scan385
The J.3 Crankcase, Cylinder Block, and Crankshaft, referencing drawing LeC. 2938.29th Aug 1931West Wittering \ V \ March1931-September1931  Scan386
Design and modifications of the 'U' series petrol tank for cost-saving and improved aesthetics.29th Aug 1931West Wittering \ V \ March1931-September1931  Scan387
Design and fitting of an exhaust cutout for a 25HP 'U' Series Special Touring Saloon.1st Sep 1931West Wittering \ V \ March1931-September1931  Scan388
Lubrication failure on shock damper ball joints and servo sticking issues from a 10,000-mile test.1st Sep 1931West Wittering \ V \ March1931-September1931  Scan389
Modification to the 25HP 'U' Series battery suspension.1st Sep 1931West Wittering \ V \ March1931-September1931  Scan390
Seeking an opinion on fitting smaller 18' wheels to the 25HP model.1st Sep 1931West Wittering \ V \ March1931-September1931  Scan391
Design modification for the exhaust silencer support.1st Sep 1931West Wittering \ V \ March1931-September1931  Scan392
Modifications to increase valve lift for the 25HP 'CHINA' model.2nd Sep 1931West Wittering \ V \ March1931-September1931  Scan393
Suggestion for main bearing lubrication, comparing oil cooling via the crankshaft versus direct air cooling of the crankcase.2nd Sep 1931West Wittering \ V \ March1931-September1931  Scan394
Alternative schemes for the 25HP battery box suspension and requesting testing.2nd Sep 1931West Wittering \ V \ March1931-September1931  Scan395
Requirement for a louvred bonnet and side panels for the 25HP 'U' Series Special Touring Saloon.2nd Sep 1931West Wittering \ V \ March1931-September1931  Scan396
Design progress and improvements on the J.3 model, focusing on cost reduction, steering, and the crankshaft.7th Sep 1931West Wittering \ V \ March1931-September1931  Scan397
Required improvements for 25HP & 45HP models, including balance weights, propeller shafts, cooling, performance, and carburetters.7th Sep 1931West Wittering \ V \ March1931-September1931  Scan398
On engine specifications for a Phantom II, comparing it to the 25HP model with a focus on power output, valve timing, and cam design.3rd Sep 1931West Wittering \ V \ March1931-September1931  Scan399
Proposal for manufacturing a cheaper rear axle tube by modifying the design to reduce machining.4th Sep 1931West Wittering \ V \ March1931-September1931  Scan400
Merits and implementation of rivetless bonnets.4th Sep 1931West Wittering \ V \ March1931-September1931  Scan401
The general scheme of the crank-case, cylinder block and crankshaft, noting changes to the rear main bearings.5th Sep 1931West Wittering \ V \ March1931-September1931  Scan402
The cross drive for the oil pump and distributor.5th Sep 1931West Wittering \ V \ March1931-September1931  Scan403
Print of drawing LeC.2943 for a J.3. crankcase, noting a modification to the dynamo strap anchorage.5th Sep 1931West Wittering \ V \ March1931-September1931  Scan404
Alternative design for a dynamic balancer, highlighting its ease of assembly and proposing it for a patent.5th Sep 1931West Wittering \ V \ March1931-September1931  Scan405
Layout and specifications for the frame, transmission, and springs for the J. 3. project.7th Sep 1931West Wittering \ V \ March1931-September1931  Scan406
Design and modification of a rivetless bonnet hinge.7th Sep 1931West Wittering \ V \ March1931-September1931  Scan407
Potential solutions for side wheel carrier unsteadiness and engine mounting.8th Sep 1931West Wittering \ V \ March1931-September1931  Scan408
Hand-drawn sketch with notes for a stay bracket attachment on a 25HP model.8th Sep 1927West Wittering \ V \ March1931-September1931  Scan409
Proposal for a new, more aesthetically pleasing Hobson petrol gauge fitting on the 'U' series 25HP petrol tank.1st Sep 1931West Wittering \ V \ March1931-September1931  Scan410
Modifications to the 20/25 crankshaft using existing forgings, including changes to journal and web dimensions.9th Sep 1931West Wittering \ V \ March1931-September1931  Scan411
P. 2 diamond mounting conversion, detailing the addition of aluminium feet to the engine.10th Sep 1931West Wittering \ V \ March1931-September1931  Scan412
Sending schemes for steering gear layout, clearances, and modifications for the L.H. car.11th Sep 1931West Wittering \ V \ March1931-September1931  Scan413
Scheme 3329 showing the front dumb iron, front cross member, and front portion of the starting handle tube.11th Sep 1931West Wittering \ V \ March1931-September1931  Scan414
Inquiry regarding the inspection progress of a model for lowered controls for P. 2.11th Sep 1931West Wittering \ V \ March1931-September1931  Scan415
Drawings for rigging and testing a 25HP induction system.12th Sep 1931West Wittering \ V \ March1931-September1931  Scan416
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