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
Performance and proposed modifications for a water pump, fan, ignition wires, Autovac, and dashboard.30th Jan 1931West Wittering \ V \ 2January1931-April1931  Scan008
The condition and performance of various steering components.30th Jan 1931West Wittering \ V \ 2January1931-April1931  Scan009
The performance and modifications of the flywheel, clutch, gearbox, and servo motor.30th Jan 1931West Wittering \ V \ 2January1931-April1931  Scan010
The condition and modifications of servo, propeller shaft, rear axle, and brake components.30th Jan 1931West Wittering \ V \ 2January1931-April1931  Scan011
Brake material performance, lubrication issues, and modifications to front axle, brakes, and shock dampers.30th Jan 1931West Wittering \ V \ 2January1931-April1931  Scan012
Test report detailing the condition of front and rear shock dampers and front road springs upon dismantling.30th Jan 1931West Wittering \ V \ 2January1931-April1931  Scan013
Inspection report detailing the lubrication status of front and rear road springs, and a note on the pedal starter motor gear.30th Jan 1931West Wittering \ V \ 2January1931-April1931  Scan014
Issues and modifications for the bonnet, petrol tank, telegauge, and battery.30th Jan 1931West Wittering \ V \ 2January1931-April1931  Scan015
Technical inspection report detailing faults and observations on various vehicle components.30th Jan 1931West Wittering \ V \ 2January1931-April1931  Scan016
The condition of the clutch, brake pedals, accelerator, radiator, radiator shutters, and coil.30th Jan 1931West Wittering \ V \ 2January1931-April1931  Scan017
The condition and performance of various automotive electrical components after testing.30th Jan 1931West Wittering \ V \ 2January1931-April1931  Scan018
The performance of a car's starter motor, Park Ward bodywork, and India tyres, with usage data.4th Feb 1931West Wittering \ V \ 2January1931-April1931  Scan019
Cover note for the final report on the 10,000-mile test run of chassis 18.G.IV in France.4th Feb 1931West Wittering \ V \ 2January1931-April1931  Scan020
Graph showing top gear acceleration performance, plotting speed in miles per hour against time in seconds.28th Dec 1930West Wittering \ V \ 2January1931-April1931  Scan021
With a purple ink stamp from the print room in Derby.4th Feb 1931West Wittering \ V \ 2January1931-April1931  Scan022
Graph showing Dynamo Output in Amps versus speed in M.P.H. for different electrical loads.22th Dec 1930West Wittering \ V \ 2January1931-April1931  Scan023
Line graph chart displaying top water, bottom water, oil, and air temperatures for a 250-mile average day's run.9th Dec 1930West Wittering \ V \ 2January1931-April1931  Scan024
Almost blank document with a purple reception stamp from Derby.2nd Feb 1931West Wittering \ V \ 2January1931-April1931  Scan025
Cracked magnesium crankcase during installation tests.4th Feb 1931West Wittering \ V \ 2January1931-April1931  Scan026
Recommendation to standardise the 48 coil medium output dynamo for the 20/25 chassis.6th Feb 1931West Wittering \ V \ 2January1931-April1931  Scan027
Cover note for a scheme by Humfrey-Sandberg to fit their clutch into a 40/50 gearbox.9th Feb 1931West Wittering \ V \ 2January1931-April1931  Scan028
The development of Delco hydraulic shock absorbers, covering different types and the challenges in achieving optimal ride quality.11th Feb 1931West Wittering \ V \ 2January1931-April1931  Scan029
Comparative analysis of flywheel dynamics at various speeds using visual traces.2nd Feb 1931West Wittering \ V \ 2January1931-April1931  Scan030
Recalling the standardisation sheet for the 20/25 48 coil medium output dynamo.2nd Feb 1931West Wittering \ V \ 2January1931-April1931  Scan031
Various complaints pertaining to the operation of dynamo brushes.3rd Feb 1931West Wittering \ V \ 2January1931-April1931  Scan032
Experiments with special dynamo brushes and analysis of output variation issues after production tests.3rd Feb 1931West Wittering \ V \ 2January1931-April1931  Scan033
Dynamo output variations related to brush gear, bedding, and reversed rotation.3rd Feb 1931West Wittering \ V \ 2January1931-April1931  Scan034
Continued report on brush bedding, sticking issues, and machine maintenance.3rd Feb 1931West Wittering \ V \ 2January1931-April1931  Scan035
Blueprint showing three views and a list of features for a mechanical component, likely a damper or shock absorber.16th Feb 1933West Wittering \ V \ 2January1931-April1931  Scan036
Bench tests and analysis of a failed Springfield De Jon ignition coil.9th Feb 1931West Wittering \ V \ 2January1931-April1931  Scan037
Detailed analysis of a coil's construction, materials, and winding specifications.9th Feb 1931West Wittering \ V \ 2January1931-April1931  Scan038
Specifications and construction details for a coil, detailing windings, insulation, materials, and weights.9th Feb 1931West Wittering \ V \ 2January1931-April1931  Scan039
The advantages and performance of lower capacity paraffin waxed paper ignition condensers.9th Feb 1931West Wittering \ V \ 2January1931-April1931  Scan040
Testing a stiffer flywheel and crankshaft flange to address engine boom on a Phantom II model.2nd Mar 1931West Wittering \ V \ 2January1931-April1931  Scan041
Blueprint detailing the dimensions for a crankshaft stiff flange.2nd Mar 1931West Wittering \ V \ 2January1931-April1931  Scan042
Stamped document, possibly a cover sheet or blank page from the archives.2nd Mar 1931West Wittering \ V \ 2January1931-April1931  Scan043
Diagram for a Stiffened Flywheel PII.2nd Mar 1931West Wittering \ V \ 2January1931-April1931  Scan044
Heavily faded document with only a purple date stamp legible.2nd Mar 1931West Wittering \ V \ 2January1931-April1931  Scan045
Material and hardness testing of shock damper pads, comparing Delco's copper-plated parts with new Nitro Alloy steel versions.3rd Mar 1931West Wittering \ V \ 2January1931-April1931  Scan046
Improvements and utilization of Phantom II rear shock dampers, specifically a split piston design.4th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan047
Initial flight testing of an automatic boost control system.5th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan048
Starter motor engagement issues on a Phantom II, particularly in frosty conditions.5th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan049
Relationship between side spare wheel carriers, rear engine feet, and customer complaints of noise.5th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan050
Examination and test report on a Marelli distributor and contact breaker.3rd Mar 1931West Wittering \ V \ 2January1931-April1931  Scan051
Observations from a distributor unit test, noting noise levels and component wear.1st Mar 1931West Wittering \ V \ 2January1931-April1931  Scan052
Tests and modifications carried out on a Phantom II diaphragm petrol pump.12th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan053
Technical report discussing the development and comparison of different fuel feed systems, including gravity tanks and various petrol pumps.12th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan054
Fuel flow tests with a standard autovac system and a proposal to fit and test a new A.C. fuel pump.12th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan055
Graph and table comparing the performance of AC and RR petrol pumps against engine RPM.14th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan056
Blank document page with a purple ink office stamp from the print room in Derby.14th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan057
Technical memo evaluating the features and performance of Scintilla Type MNG.12-D magnetos.13th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan058
Results of performance tests on 12-cylinder, four-spark-per-revolution magnetos for an F engine, noting multiple specification failures.3rd Mar 1931West Wittering \ V \ 2January1931-April1931  Scan059
Magneto sparking performance issues and recommended modifications to the Scintilla Co.3rd Mar 1931West Wittering \ V \ 2January1931-April1931  Scan060
Providing corrected weight figures for standard and cast iron brake drums.14th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan061
Meeting report on testing cars with different gearboxes and clutches, including Maybach and Wilson types.13th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan062
Conference report discussing gearboxes, car performance, and shock absorbers.13th Jan 1931West Wittering \ V \ 2January1931-April1931  Scan063
Meeting minutes discussing Phantom II bodies and starters, Young batteries, and Japan III costs.13th Jan 1931West Wittering \ V \ 2January1931-April1931  Scan064
Advantages of front engine feet over rear engine feet for the 'Japan III' engine mounting.14th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan065
Propeller shaft whirling issues and the proposed solution of increasing shaft diameter and thickness.16th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan066
Test report comparing their own ignition coil against two American-made coils (De Jon and Marelli) on a 20/25 HP car.17th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan067
Cold-weather testing of a Phantom II starter motor, identifying congealed oil as the cause of failure.21th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan068
Performance of automatic boost control systems from different manufacturers and proposing a comparative test.23th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan069
Comparison of Wakefield's P.4 mineral oil as an alternative to Silvertown P.4 for use in aero engines.24th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan070
Possibilities and implications of series winding on main poles for car dynamos.27th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan071
Dynamo output curves, performance, and temperature control methods, including third brush control.27th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan072
Dynamo and battery performance in relation to headlamp current and output curves.27th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan073
Comparison of specifications between a Lucas Dynamo Model C5-O Type N-O and a similar-sized Rolls-Royce machine.30th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan074
Comparison of the electrical and mechanical properties between a Lucas machine and a Rolls-Royce machine.30th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan075
Comparison of a Lucas machine's features and performance against an existing standard model, focusing on the armature and winding.1st May 1931West Wittering \ V \ 2January1931-April1931  Scan076
Continued analysis of dynamo charging outputs and resistance stages for vehicle electrical systems.1st Mar 1931West Wittering \ V \ 2January1931-April1931  Scan077
Performance comparison of a standard machine against a Lucas machine, detailing potential improvements.3rd Mar 1931West Wittering \ V \ 2January1931-April1931  Scan078
Diagram of an armature stamping for a Lucas Model C5-O Type N-O dynamo.25th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan079
Output speed performance curves for 20/25 Dynamos.25th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan080
Marked with a purple ink stamp from the Print Room in Derby.31th Mar 1931West Wittering \ V \ 2January1931-April1931  Scan081
Unsuccessful results of a test to cure squeaking brakes and the plan for a further test.1st Apr 1931West Wittering \ V \ 2January1931-April1931  Scan082
Summarizing the experience with hydraulic shock dampers on Phantom I and Phantom II models.2nd Dec 1930West Wittering \ V \ December1930-February1931  Scan001
Analysis of suspension and shock damper issues, particularly concerning noise, efficiency, and component deflection.2nd Dec 1930West Wittering \ V \ December1930-February1931  Scan002
Hydraulic damper performance, high-speed road holding, and maintenance issues.2nd Dec 1930West Wittering \ V \ December1930-February1931  Scan003
The performance and proposed modifications for dampers, valves, and related components.2nd Dec 1930West Wittering \ V \ December1930-February1931  Scan004
Damper performance, valve accessibility, and load measurements for various car models.2nd Dec 1930West Wittering \ V \ December1930-February1931  Scan005
Series of diagrams showing the progressive falling off in rear damper efficiency with reduction of stroke.4th Dec 1930West Wittering \ V \ December1930-February1931  Scan006
Blank document with a Print Room date stamp from Derby.4th Dec 1930West Wittering \ V \ December1930-February1931  Scan007
Graphs showing the effect of restricting air vent ball lift on a Phantom II rear shock damper.3rd Dec 1930West Wittering \ V \ December1930-February1931  Scan008
Reverse side of a document showing a purple ink stamp from the print room.3rd Dec 1930West Wittering \ V \ December1930-February1931  Scan009
Graph and diagram illustrating tests on different rear shock damper levers.21th Nov 1930West Wittering \ V \ December1930-February1931  Scan010
Faint, largely illegible carbon copy of a document with a purple ink stamp.3rd Dec 1930West Wittering \ V \ December1930-February1931  Scan011
The laboratory testing of two different sequence starter main switch units, comparing different thicknesses of copper contact laminations.2nd Dec 1930West Wittering \ V \ December1930-February1931  Scan012
'F' cylinder liner tests designed to reduce distortion, seizure, and cracked blocks.4th Dec 1930West Wittering \ V \ December1930-February1931  Scan013
Test summary comparing different cylinder liner schemes and the effects of honing on distortion.4th Nov 1930West Wittering \ V \ December1930-February1931  Scan014
Two experiments with beneficial results on the 'flywheel period' vibrations on a 25-HP engine.8th Dec 1930West Wittering \ V \ December1930-February1931  Scan015
'F' cylinder tests, detailing various cylinder liner modifications and their results.1st Dec 1930West Wittering \ V \ December1930-February1931  Scan016
Engine tests comparing different piston ring configurations and their effects on oil consumption and block distortion.1st Dec 1930West Wittering \ V \ December1930-February1931  Scan017
Modification to the P.2. starter's auxiliary switch by removing the carbon contacts.1st Dec 1930West Wittering \ V \ December1930-February1931  Scan018
Proposal for a two-rate charge switching scheme using a special switchbox for one-way interconnection.12th Dec 1930West Wittering \ V \ December1930-February1931  Scan019
Continued report on the interconnection of lighting switches and dynamo charging.1st Dec 1930West Wittering \ V \ December1930-February1931  Scan020
Discovery of cracks in a connecting rod from a compression ignition engine.13th Dec 1930West Wittering \ V \ December1930-February1931  Scan021
Sketch illustrating cracks in a connecting rod from a C.I. Unit.10th Dec 1930West Wittering \ V \ December1930-February1931  Scan022
Blank page with a purple 'Print Room, Derby' date stamp.13th Dec 1930West Wittering \ V \ December1930-February1931  Scan023
Rating tests and interchangeability for full and moderate supercharged 'H' engines.15th Dec 1930West Wittering \ V \ December1930-February1931  Scan024
Comparison table of engine data for different rotor diameters and supercharger types.15th Dec 1930West Wittering \ V \ December1930-February1931  Scan025
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