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
Flywheel modifications for Phantom experiments, specifically the need for a lighter and stiffer design.23th Feb 1931West Wittering \ V \ October1930-February1931  Scan366
Issues with shock dampers, springs, and potential replacements like the Delco-Lovejoy model.27th Feb 1931West Wittering \ V \ October1930-February1931  Scan367
Comparison of lever and shaft designs, including an evaluation of a Delco damper.23th Feb 1931West Wittering \ V \ October1930-February1931  Scan368
Two proposed schemes for improving shock dampers, focusing on increased stiffness.23th Feb 1931West Wittering \ V \ October1930-February1931  Scan369
Original schemes for controls of a 3rd speed epicyclic gearbox.23th Feb 1931West Wittering \ V \ October1930-February1931  Scan370
Revision to the engine front suspension, referencing a blueprint and pivot pin fixing methods.23th Feb 1931West Wittering \ V \ October1930-February1931  Scan371
Potential improvements to car 18-EX, specifically addressing torque reactions and flywheel vibration.23th Feb 1931West Wittering \ V \ October1930-February1931  Scan372
Modifications to the 'Maybach dogs' on an epicyclic 3rd speed box to prevent a clicking sound.23th Feb 1931West Wittering \ V \ October1930-February1931  Scan373
Design of a double piston shock damper, with diagrams.24th Feb 1931West Wittering \ V \ October1930-February1931  Scan374
Design specifications and alternatives for various mechanical components.24th Feb 1931West Wittering \ V \ October1930-February1931  Scan375
Damping control, competition, and a design for a broach for fine serrations in an internal lever.25th Feb 1931West Wittering \ V \ October1930-February1931  Scan376
Review of servo and speedometer drives, with feedback on helical gears, reverse gears, and the P.2. gearbox.25th Feb 1931West Wittering \ V \ October1930-February1931  Scan377
Design and production considerations for hydraulic dampers.25th Feb 1931West Wittering \ V \ October1930-February1931  Scan378
Design improvements for a mechanical component, including details on serrations, bearings, and materials.25th Feb 1931West Wittering \ V \ October1930-February1931  Scan379
Car vibrations, crankshaft weight, balance weights, and flywheel design.25th Feb 1931West Wittering \ V \ October1930-February1931  Scan380
Observations on the re-design of horizontal type hydraulic dampers, discussing pistons, valves, and oil/air separation.26th Feb 1931West Wittering \ V \ October1930-February1931  Scan381
Damping chassis motion, rebound, and front axle control, referencing road test data.29th Oct 1928West Wittering \ V \ October1930-February1931  Scan382
Issues and proposed solutions for exhaust manifolds.26th Feb 1931West Wittering \ V \ October1930-February1931  Scan383
Improvements to manifolds, including material changes and the addition of cooling ribs.29th Aug 1928West Wittering \ V \ October1930-February1931  Scan384
Design memo with diagrams discussing the construction of hydraulic dampers, particularly the valves and drilling.26th Feb 1931West Wittering \ V \ October1930-February1931  Scan385
Mr. Grylls' work on 12-cylinder engines and comparing them to Maybach and Lion engines.26th Feb 1931West Wittering \ V \ October1930-February1931  Scan386
Flywheel vibrations and a proposed ball bearing scheme.27th Feb 1931West Wittering \ V \ October1930-February1931  Scan387
Design of shock dampers, proposing a 4-stud cover over other methods.27th Feb 1931West Wittering \ V \ October1930-February1931  Scan388
Modifications to a flywheel to make it lighter and stiffer, including material changes and bolt configuration.27th Feb 1931West Wittering \ V \ October1930-February1931  Scan389
Engine vibrations and proposing a new mounting system to counteract wobbles and jellying.27th Feb 1931West Wittering \ V \ October1930-February1931  Scan390
Sketch of an engine mounting system, detailing the movement of links due to engine torque and frame torsion.21th Feb 1931West Wittering \ V \ October1930-February1931  Scan391
Body booming, vibrations, and potential engine mounting solutions.28th Feb 1931West Wittering \ V \ October1930-February1931  Scan392
Chassis torsional stiffness, body-induced vibrations, and the necessity of well-designed dampers.28th Feb 1931West Wittering \ V \ October1930-February1931  Scan393
Telegram copy suggesting obtaining a Maybach chassis to test several car bodies on it.28th Feb 1931West Wittering \ V \ October1930-February1931  Scan394
Modified engine mounting design using bell cranks and a push/pull rod for an anti-jellying scheme.28th Feb 1931West Wittering \ V \ October1930-February1931  Scan395
The arrangement of the twin battery ignition system and a proposed change to the H.T. moulding cap pattern.28th Feb 1931West Wittering \ V \ October1930-February1931  Scan396
Friction drive and assembly of the cone mounting for the flange on the Japan 3 engine.28th Feb 1931West Wittering \ V \ October1930-February1931  Scan397
Secret memo discussing design schemes for the front-end suspension of the 'Japan 3' engine.28th Feb 1931West Wittering \ V \ October1930-February1931  Scan398
Cover memo for an attached letter from Springfield concerning electro gear transmission.2nd May 1931West Wittering \ W \ May1931-August1931  Scan001
Attached Buick service book containing information on the gearbox and general features.4th May 1931West Wittering \ W \ May1931-August1931  Scan002
The standardization of spare wheel carriers for the Phantom II and 20/25 HP models.4th May 1931West Wittering \ W \ May1931-August1931  Scan003
Tests conducted on double shock dampers to resolve valve flutter issues.13th May 1931West Wittering \ W \ May1931-August1931  Scan004
Modifications and tests on a sylphon tube and valve to improve damper performance.12th May 1931West Wittering \ W \ May1931-August1931  Scan005
Specification tables for low rating springs for 40/50 and 20 HP models.12th May 1931West Wittering \ W \ May1931-August1931  Scan006
Main leaf test data for 20 HP front and rear springs, including camber and load ratings.6th May 1931West Wittering \ W \ May1931-August1931  Scan007
The development and modification of improved dynamos for 40/50 and 25 HP models.6th May 1931West Wittering \ W \ May1931-August1931  Scan008
Dynamo output, electrical load, and proposed running conditions for vehicle testing.6th May 1931West Wittering \ W \ May1931-August1931  Scan009
Improvements to dynamo charging schemes and proposing a new machine to address insufficient charge issues.6th May 1931West Wittering \ W \ May1931-August1931  Scan010
Graph of output speed curves comparing the ampere output of two different 48 coil machines at various dynamo RPMs.1st Dec 1930West Wittering \ W \ May1931-August1931  Scan011
Graph comparing the output speed curves of a currently fitted 56 coil machine versus a proposed standard 48 coil machine.1st Dec 1930West Wittering \ W \ May1931-August1931  Scan012
Heavily faded carbon copy document with a purple ink 'Print Room' stamp.16th May 1931West Wittering \ W \ May1931-August1931  Scan013
Report comparing Delco, Bosch, and Lucas dynamos, focusing on features like control brushes and thermostats.6th May 1931West Wittering \ W \ May1931-August1931  Scan014
Water flow test results for four different radiator configurations on an SS.15 unit.19th May 1921West Wittering \ W \ May1931-August1931  Scan015
Graph comparing the performance of three different radiator types, plotting delivery rate and suction pump pressure against engine RPM.19th May 1921West Wittering \ W \ May1931-August1931  Scan016
Mostly blank document page with a purple ink date stamp.19th May 1931West Wittering \ W \ May1931-August1931  Scan017
Comparative table of radiator matrix tests showing critical temperatures and physical details.21th Apr 1931West Wittering \ W \ May1931-August1931  Scan018
Drawing for two types of cylinder studs, detailing dimensions, materials, and manufacturing notes.1st Jul 1930West Wittering \ W \ May1931-August1931  Scan019
Drawing for a square Matrix Tube with annealing and pressure test specifications.22th May 1931West Wittering \ W \ May1931-August1931  Scan020
Various tests carried out to resolve brake squeaks and groans on Phantom cars.21th May 1931West Wittering \ W \ May1931-August1931  Scan021
Issues with steel ribbed brake drums and a solution for rear brake groans.21th May 1931West Wittering \ W \ May1931-August1931  Scan022
Progress report on the testing of a dynamo with a series winding.21th May 1931West Wittering \ W \ May1931-August1931  Scan023
Test results and potential solutions for maintaining dynamo output at high speeds.21th May 1931West Wittering \ W \ May1931-August1931  Scan024
Particulars of valve areas.22th May 1931West Wittering \ W \ May1931-August1931  Scan025
The satisfactory settings for a torque reaction damper on a Phantom II vehicle.22th May 1931West Wittering \ W \ May1931-August1931  Scan026
'J.1.' specification and production plans for the second half of the 'T' series cars.29th May 1931West Wittering \ W \ May1931-August1931  Scan027
Output curve for a 40/50 HP Dynamo's two-rate charge scheme proposed for the N.2. series.29th May 1931West Wittering \ W \ May1931-August1931  Scan028
Graph showing dynamo output speed curves under various operating conditions.27th May 1931West Wittering \ W \ May1931-August1931  Scan029
Heavily faded document with a purple 'Print Room' stamp from Derby.29th May 1931West Wittering \ W \ May1931-August1931  Scan030
Series of five graphs showing results from frame deflection and distortion tests.28th May 1931West Wittering \ W \ May1931-August1931  Scan031
The reverse side of a folded document with a purple ink date stamp in the bottom right corner.29th May 1931West Wittering \ W \ May1931-August1931  Scan032
Power output tests and performance results for various camshafts, carburetters, and exhaust systems.29th May 1931West Wittering \ W \ May1931-August1931  Scan033
Engine performance, including valve timing diagrams, camshafts, and exhaust systems.11th Jul 1930West Wittering \ W \ May1931-August1931  Scan034
Performance graph comparing BHP and BMEP vs RPM for Twin Zenith and Standard carburettors with different camshaft configurations.11th Jul 1930West Wittering \ W \ May1931-August1931  Scan035
Heavily faded document with a purple Print Room stamp in the bottom right corner.29th May 1931West Wittering \ W \ May1931-August1931  Scan036
Cost reduction and alternative suppliers for electrical equipment such as ammeters, clocks, speedometers, and batteries.30th May 1931West Wittering \ W \ May1931-August1931  Scan037
The design and performance of ignition system components including coils, condensers, distributors, and insulation.1st May 1931West Wittering \ W \ May1931-August1931  Scan038
The design and performance of various automotive electrical components, including the distribution board, horn, starter motor, and switches.30th May 1931West Wittering \ W \ May1931-August1931  Scan039
Brief typed memo confirming the dispatch of requested parts.1st Jun 1931West Wittering \ W \ May1931-August1931  Scan040
Results of tests on a shock absorber valve and ideas for further modifications.1st Jun 1931West Wittering \ W \ May1931-August1931  Scan041
Outline print of a Zenith carburetter supplied for testing purposes.1st Jun 1931West Wittering \ W \ May1931-August1931  Scan042
Test of a 40/50 dynamo fitted with a series winding.6th Mar 1931West Wittering \ W \ May1931-August1931  Scan043
Graph showing the output speed curves of a dynamo, with and without series field winding.1st Jun 1931West Wittering \ W \ May1931-August1931  Scan044
Mostly blank document featuring a purple ink date stamp.2nd Jun 1931West Wittering \ W \ May1931-August1931  Scan045
Attached Experimental Department expenses for the 1931 file.2nd Jun 1931West Wittering \ W \ May1931-August1931  Scan046
Blueprints for P.2 & 25 HP exhaust tail pipes.2nd Jun 1931West Wittering \ W \ May1931-August1931  Scan047
Appointment of a technical liaison, Mr. Tresilian, for experimental work between Derby and W.W.3rd Jun 1931West Wittering \ W \ May1931-August1931  Scan048
Short memo confirming if an attached blueprint was previously sent.4th Jun 1931West Wittering \ W \ May1931-August1931  Scan049
Re-arranged proportions for the Battery Ignition H.T. Rotor Drive to facilitate production.8th Jun 1931West Wittering \ W \ May1931-August1931  Scan050
Back pressure tests on the J.I. exhaust system for the 25 HP model.9th Jun 1931West Wittering \ W \ May1931-August1931  Scan051
Graph of exhaust back pressure curves for various silencer configurations on engine unit N.G.8.26th Jun 1933West Wittering \ W \ May1931-August1931  Scan052
Stamped blank document from the print room.10th Jun 1931West Wittering \ W \ May1931-August1931  Scan053
Cross-section drawing of a Double Piston Damper and Sylphon Chamber Pressure Release with annotations.6th Jun 1931West Wittering \ W \ May1931-August1931  Scan054
Performance graphs for a Double Piston Damper at high and low pressures.10th Jun 1931West Wittering \ W \ May1931-August1931  Scan055
Blank page with a Print Room date stamp.13th Jun 1931West Wittering \ W \ May1931-August1931  Scan056
Tests and modifications on a dynamo with series winding.15th Jun 1931West Wittering \ W \ May1931-August1931  Scan057
Graph showing the output speed curves of a dynamo under three different test conditions for a PII chassis.10th Jun 1931West Wittering \ W \ May1931-August1931  Scan058
Blank document page with a 'PRINT ROOM' date stamp.15th Jun 1931West Wittering \ W \ May1931-August1931  Scan059
Graph showing the output speed curves of a dynamo under three different winding configurations.1st Jun 1931West Wittering \ W \ May1931-August1931  Scan060
Back page marked with a 'Print Room' stamp.15th Jun 1931West Wittering \ W \ May1931-August1931  Scan061
Criticisms and suggested modifications for the new Phantom II type luggage grid.17th Jun 1931West Wittering \ W \ May1931-August1931  Scan062
Feedback on the design of a new luggage grid, noting fitting issues, fixing preferences, and suggesting an improved handle shape.17th Jun 1931West Wittering \ W \ May1931-August1931  Scan063
Views of spring makers on a proposed front spring design and an alternative suggestion.17th Jun 1931West Wittering \ W \ May1931-August1931  Scan064
Letter from Thos. Firth & Sons detailing the design of 20/25 HP Front Flexible Road Springs.29th May 1931West Wittering \ W \ May1931-August1931  Scan065
Test report on a Watford 100 m.p.h. magnetic type speedometer.9th Jun 1931West Wittering \ W \ May1931-August1931  Scan066
Graph showing the performance of two magnetic speedometers, charting the drop in M.P.H. reading against a rise in temperature.19th Jun 1931West Wittering \ W \ May1931-August1931  Scan067
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