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
Novel suspension systems observed at the Paris Salon, with a detailed analysis of the Farman system.11th Oct 1927West Wittering \ R \ 2October1927-November-1927  11
Continued road test report evaluating a vehicle's suspension and steering performance, noting a harsh ride and issues with the steering gear.1st Nov 1927West Wittering \ R \ 2October1927-November-1927  12
Technical evaluation of the chassis, suspension, and handling characteristics of Steyr and Buick cars.11th Nov 1927West Wittering \ R \ 2October1927-November-1927  13
Summary of impressions on various cars with unconventional suspension systems and a review of the La Salle.14th Nov 1927West Wittering \ R \ 2October1927-November-1927  14
Rear axle control and engine design trends, with illustrations of torque control fittings.17th Nov 1927West Wittering \ R \ 2October1927-November-1927  15
Report page discussing various automotive points of interest including servos, petrol pumps, and a blueprint of a mechanical part.23th Nov 1927West Wittering \ R \ 2October1927-November-1927  16
Use of an independent dynamo switch and an experiment with an artificial load on the dynamo-battery system.12th Oct 1927West Wittering \ R \ 2October1927-November-1927  17
The moments of inertia for Watford and B.T.H. aero magneto rotors and a proposal for a related experiment.12th Oct 1927West Wittering \ R \ 2October1927-November-1927  18
Weakness of the front spring under compression during braking and the excessive weight of the torque arm.14th Oct 1927West Wittering \ R \ 2October1927-November-1927  19
Issues and potential improvements for the 20 HP steering system.14th Oct 1927West Wittering \ R \ 2October1927-November-1927  20
The performance of experimental tungsten ignition contacts and associated components.18th Oct 1927West Wittering \ R \ 2October1927-November-1927  21
Ignition system experiments and a review of battery ignition distributors at the Olympia Show.18th Oct 1927West Wittering \ R \ 2October1927-November-1927  22
The Delco-Remy contact breaker arrangement and plans for further experiments.18th Oct 1927West Wittering \ R \ 2October1927-November-1927  23
Report correcting the specific weight of the 20 HP reciprocating parts and comparing tubular connecting rod designs with Lorraine and Hispano cars.8th Oct 1927West Wittering \ R \ 2October1927-November-1927  24
Comparative table of engine component weights and dimensions for 20HP, 40HP, Lorraine, and Hispano engines.19th Oct 1927West Wittering \ R \ 2October1927-November-1927  25
The co-efficient of friction for various materials under dry and oily conditions.19th Oct 1927West Wittering \ R \ 2October1927-November-1927  26
Friction tests on various materials and experiments on a multi-plate spring drive damper.21th Oct 1927West Wittering \ R \ 2October1927-November-1927  27
Confirming tungsten points have been standardised and instructed for production for battery ignition systems.21th Oct 1927West Wittering \ R \ 2October1927-November-1927  28
Test report on an experimental mushroom type H.T. rotor, focusing on preventing failure by tracking.22th Oct 1927West Wittering \ R \ 2October1927-November-1927  29
Distributor head sparking and corrosion, proposing a redesigned rotor with vanes.22th Oct 1927West Wittering \ R \ 2October1927-November-1927  30
On body mounting, confirming subframe mounting reduces vibration but noting issues with dash and scuttle movement.1st Oct 1927West Wittering \ R \ 2October1927-November-1927  31
Report from the Coachwork Sub-Committee on testing a separate under-frame for mounting a car body to improve ride quality.1st Nov 1924West Wittering \ R \ 2October1927-November-1927  32
Tests of a Bradburn & Wedge rubber mounting scheme to reduce swaying and booming in two different car models.22th Apr 1926West Wittering \ R \ 2October1927-November-1927  33
Desirability and practicality of fitting a subframe to 40/50 and 20 HP chassis.22th Apr 1926West Wittering \ R \ 2October1927-November-1927  34
Recommending the purchase of a Stutz car for evaluation, noting the sale of a Lancia and findings from a Hispano.24th Oct 1927West Wittering \ R \ 2October1927-November-1927  35
Road trial report on a 6-Cylinder Bentley from the 1927 Motor Show.24th Oct 1927West Wittering \ R \ 2October1927-November-1927  36
Comparative performance review of Bentley, Daimler, and Stutz vehicles.24th Oct 1927West Wittering \ R \ 2October1927-November-1927  37
Technical review of the Stutz and a Bugatti, discussing their engine performance, handling, and other characteristics.24th Oct 1927West Wittering \ R \ 2October1927-November-1927  38
Page discussing a 6-cylinder, 14 HP Lea Francis engine with 2 O.H.V. camshafts.4th Oct 1927West Wittering \ R \ 2October1927-November-1927  39
Chassis electrical system, focusing on battery size, charging issues, and specific components like the Danger Lamp and Auto Switch units.25th Oct 1927West Wittering \ R \ 2October1927-November-1927  40
The vehicle's electrical system, charging current, and the potential adoption of an auto-switch.12th Oct 1927West Wittering \ R \ 2October1927-November-1927  41
Continued description of a charging system, detailing the function and connection of a voltmeter.18th Apr 1925West Wittering \ R \ 2October1927-November-1927  42
The design and application of a 'Danger lamp unit' for vehicle electrical systems.18th Apr 1925West Wittering \ R \ 2October1927-November-1927  43
The wiring and function of a four-terminal unit for indicating high water temperature or high voltage system faults.18th Apr 1925West Wittering \ R \ 2October1927-November-1927  44
Explanation of the dynamo-battery system, detailing the function of the danger lamp under various fault conditions and the cutout coil connections.18th Apr 1925West Wittering \ R \ 2October1927-November-1927  45
Report discussing the wiring of a distribution box and associated electrical components.18th Oct 1927West Wittering \ R \ 2October1927-November-1927  46
Chassis electrical system diagram incorporating a Danger Lamp Unit or an Auto Switch Unit.18th Oct 1927West Wittering \ R \ 2October1927-November-1927  47
Two-page document with a blank left page and a faded, illegible right page featuring a 'Print Room' stamp.19th Oct 1927West Wittering \ R \ 2October1927-November-1927  48
Bench testing an auto switch and noting unsatisfactory working conditions.27th Oct 1927West Wittering \ R \ 2October1927-November-1927  49
Analysis of an auto switch phenomenon, resistance, and shunt coil connections in a dynamo-battery circuit.5th Oct 1927West Wittering \ R \ 2October1927-November-1927  50
Analysis of modifying a five-terminal switch by adding an extra terminal for the shunt coil to enhance circuit protection.5th Oct 1927West Wittering \ R \ 2October1927-November-1927  51
The problem of reducing charging current using a vibrator regulator and the effects of resistance R.8th Jun 1927West Wittering \ R \ 2October1927-November-1927  52
Proposal for a new method to prevent vibrator regulator action in a dynamo electrical system.8th Jun 1927West Wittering \ R \ 2October1927-November-1927  53
Electrical experiments and proposing further trials on the chassis.29th Oct 1927West Wittering \ R \ 2October1927-November-1927  54
Tests conducted to determine if a standard 6.75' balloon tyre would come off the well base rim when deflated.29th Oct 1927West Wittering \ R \ 2October1927-November-1927  55
The safety and performance of well-based tyres following various tests and real-world scenarios.17th Oct 1927West Wittering \ R \ 2October1927-November-1927  56
Deflation tests conducted on large tyres to observe their performance when failing at speed.17th Oct 1927West Wittering \ R \ 2October1927-November-1927  57
Vibration tests conducted on a 20 HP spring drive and crankshaft damper.31th Oct 1927West Wittering \ R \ 2October1927-November-1927  58
Technical analysis of engine vibration, focusing on difficulties with keeping plates tight on small splines and methods to reduce roughness.22th Apr 1927West Wittering \ R \ 2October1927-November-1927  59
Dynamometer experiments showing an extended smooth running range with a spring drive.1st Nov 1927West Wittering \ R \ 2October1927-November-1927  60
The test results of the G.1. type 20 HP spring drive, analyzing harmonics and engine roughness.1st Nov 1927West Wittering \ R \ 2October1927-November-1927  61
Blueprint showing a cross-section of an experimental spring-drive mechanism for the Goshawk III engine.31th Oct 1927West Wittering \ R \ 2October1927-November-1927  62
Blank page with a Print Room date stamp from Derby.31th Oct 1927West Wittering \ R \ 2October1927-November-1927  63
Upcoming tests on a modified crankshaft, tubular connecting rods, and new slipper wheel for the 10-EX engine.11th Nov 1927West Wittering \ R \ 2October1927-November-1927  64
Axle weights and weight savings for the 40/50 HP model.1st Nov 1927West Wittering \ R \ 2October1927-November-1927  65
Comparison of axle weights between the EAC.7 and 40/50 HP models, detailing alterations due to the Hotchkiss drive.1st Nov 1927West Wittering \ R \ 2October1927-November-1927  66
Weight saving comparison table for axle components, independent of the type of axle control.1st Nov 1927West Wittering \ R \ 2October1927-November-1927  67
Specification sheet detailing the weights of axle components for the EAC.7 and 40/50 models.2nd Nov 1927West Wittering \ R \ 2October1927-November-1927  68
Investigation into a knocking noise issue with the Watford Sleeveless Magneto Type EW6, involving component swaps and further testing.2nd Nov 1927West Wittering \ R \ 2October1927-November-1927  69
The investigation of knocking noises in Watford Sleeveless Magneto Type EW6, with recommendations for further testing.2nd Nov 1927West Wittering \ R \ 2October1927-November-1927  70
Comparative suspension tests for 40/50 HP cars, focusing on the differences between semi-elliptic and cantilever sprung systems.2nd Nov 1927West Wittering \ R \ 2October1927-November-1927  71
Testing hydraulics with increased viscosity oil to improve vehicle ride and damping.12th Nov 1927West Wittering \ R \ 2October1927-November-1927  72
Preliminary examination report on a Bosch Type FU6R magneto, comparing it with existing standards.12th Nov 1927West Wittering \ R \ 2October1927-November-1927  73
Contact breaker timing and performance test results for a magneto.2nd Nov 1921West Wittering \ R \ 2October1927-November-1927  74
Magneto performance tests, detailing firing speeds, operational noise, and comparison with other models.2nd Nov 1921West Wittering \ R \ 2October1927-November-1927  75
Inspection report detailing the positive aspects and criticisms of an electrical machine.2nd Nov 1921West Wittering \ R \ 2October1927-November-1927  76
Report page discussing a machine's noise level and doubt about its suitability for an experimental car.3rd Nov 1927West Wittering \ R \ 2October1927-November-1927  77
The standardization and testing of 28-slot armatures for 20 HP and 40/50 dynamos to resolve noise issues.3rd Nov 1927West Wittering \ R \ 2October1927-November-1927  78
Report discussing armature noise and performance improvements in experimental N.B. machines.10th Oct 1927West Wittering \ R \ 2October1927-November-1927  79
Experiments with a low depression carburetter on the Phantom engine to improve volumetric efficiency.11th Nov 1927West Wittering \ R \ 2October1927-November-1927  80
Experiments to increase engine power by modifying carburettor and intake dimensions.11th Nov 1927West Wittering \ R \ 2October1927-November-1927  81
Engine development experiments, focusing on carburettor performance and power output improvements.11th Nov 1927West Wittering \ R \ 2October1927-November-1927  82
Proposal to construct and test a new expanding type carburetter based on an annular diffuser Claudel design.1st Nov 1927West Wittering \ R \ 2October1927-November-1927  83
On the testing of a freewheel on a 12 HP Austin, discussing its performance and potential future use.1st Nov 1927West Wittering \ R \ 2October1927-November-1927  84
Testing of a freewheel on a transmission and its potential future use.11th Nov 1927West Wittering \ R \ 2October1927-November-1927  85
Description of the general properties of the Humfrey-Sandberg free wheel clutch.11th Nov 1927West Wittering \ R \ 2October1927-November-1927  86
Description of a unique free wheel clutch and its application in motor vehicles and locomotives.11th Nov 1927West Wittering \ R \ 2October1927-November-1927  87
The features and advantages of a transmission system with free-wheeling and clutch capabilities.11th Nov 1927West Wittering \ R \ 2October1927-November-1927  88
The features of slipping clutches, constant mesh gearboxes, and differentials.10th Oct 1927West Wittering \ R \ 2October1927-November-1927  89
Page detailing the drive, braking, and general industrial applications of a mechanical system.1st May 1927West Wittering \ R \ 2October1927-November-1927  90
Confidential report on Mr. J.C.W. Humfrey's invention of a 'one-way' clutch.1st May 1927West Wittering \ R \ 2October1927-November-1927  91
Description of the operation and acting forces within a roller-based friction clutch.1st May 1927West Wittering \ R \ 2October1927-November-1927  92
The mechanics of a clutch system, focusing on motion reversal and bearing surface geometry.1st May 1927West Wittering \ R \ 2October1927-November-1927  93
Mathematical analysis of the geometry of rollers using hyperboloid of revolution equations.1st May 1927West Wittering \ R \ 2October1927-November-1927  94
Analysis of stress concentration and uneven force distribution on a roller component.1st May 1927West Wittering \ R \ 2October1927-November-1927  95
Typed report discussing clutch roller compression and the loss of energy during clutching.1st May 1927West Wittering \ R \ 2October1927-November-1927  96
Examination and summary of conclusions regarding a clutch design, focusing on friction, wear, and load distribution.4th Aug 1924West Wittering \ R \ 2October1927-November-1927  97
The concluding page of a report discussing a clutch arrangement and manufacturing proposition.4th Aug 1924West Wittering \ R \ 2October1927-November-1927  98
Further report on the Humfrey-Sandberg clutch by Professor L. N. G. Filon.4th Aug 1924West Wittering \ R \ 2October1927-November-1927  99
Explanation of the operation of a clutch mechanism involving rollers and conoids.18th Jul 1927West Wittering \ R \ 2October1927-November-1927  100
Mechanical analysis of forces and slip between conoids and rollers in a component.18th Jul 1927West Wittering \ R \ 2October1927-November-1927  101
Analysis of the axial thrust forces on rollers and conoids within a mechanical system.18th Jul 1927West Wittering \ R \ 2October1927-November-1927  102
Mechanical analysis of roller slipping, inclination, and the forces affecting their motion.18th Jul 1927West Wittering \ R \ 2October1927-November-1927  103
Analysis of roller forces, flange mechanics, and free-wheel action within a clutch system.18th Jul 1927West Wittering \ R \ 2October1927-November-1927  104
The mechanics of a clutch operating as a slipping drive, covering torque, friction, and axial thrust.18th Jul 1927West Wittering \ R \ 2October1927-November-1927  105
Providing reverse drive and the advantages of a specific clutch type for a constant-mesh gearbox.10th Aug 1926West Wittering \ R \ 2October1927-November-1927  106
List of six advantages of a mechanical system, possibly a clutch or gear mechanism, concluding a report.10th Aug 1926West Wittering \ R \ 2October1927-November-1927  107
Diagrams illustrating the geometry and mechanics of a splined conoidal joint or coupling.4th Nov 1927West Wittering \ R \ 2October1927-November-1927  108
High-speed engine vibration and crankshaft critical speed, noting bearing distortion.4th Nov 1927West Wittering \ R \ 2October1927-November-1927  109
Continued report discussing a 1500 c.c. racing engine, comparing crankcase designs and the effectiveness of a spring drive.5th Nov 1927West Wittering \ R \ 2October1927-November-1927  110
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