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
Graph showing the results of a battery discharge test after 8231 miles of use.21th Feb 1927West Wittering \ Q \ February1927-March1927  67
Graph showing continuous high rate discharge curves for 40-50 HP chassis batteries through a fixed resistance.1st Feb 1923West Wittering \ Q \ February1927-March1927  68
Analysis of the Lorraine Dietrich crankshaft's synchronous speeds, vibration, and torsional stiffness.1st Mar 1927West Wittering \ Q \ February1927-March1927  69
Analysis of crankshaft inertia, synchronous speed, and the effects of spring drives, with reference to Goshawk and 20 HP engines.1st Mar 1927West Wittering \ Q \ February1927-March1927  70
Progress report on torsional vibration experiments on the Lorraine and Goshawk engines.2nd Mar 1927West Wittering \ Q \ February1927-March1927  71
Graphical comparison of crankshaft stiffness and torsional deflection curves for a standard 20 HP and a Lorraine-Dietrich crankshaft.2nd Mar 1927West Wittering \ Q \ February1927-March1927  72
Blueprint of a crankshaft for a Lorraine-Dietrich engine, showing main dimensions and cross-sections.1st Mar 1927West Wittering \ Q \ February1927-March1927  73
Drawing of a piston, connecting rod, gudgeon pin, and related components for a Lorraine Dietrich engine.1st Mar 1927West Wittering \ Q \ February1927-March1927  74
Battery ignition contact points and the probable standardisation of tungsten points.4th Mar 1927West Wittering \ Q \ February1927-March1927  75
Instructions on the correct lining, maintenance, and cleaning of battery ignition contact points.2nd Mar 1927West Wittering \ Q \ February1927-March1927  76
Standardisation and supply of tungsten contact breaker points and related ignition system design considerations.4th Mar 1927West Wittering \ Q \ February1927-March1927  77
Optimizing ignition systems, focusing on inductance, condenser capacity, and contact point life.4th Mar 1927West Wittering \ Q \ February1927-March1927  78
The sufficiency of a hold-on electromagnet for the Sequence Starter No.2 Scheme.8th Mar 1927West Wittering \ Q \ February1927-March1927  79
The inspection, performance, and testing of a P & R Special Battery 3A.8th Mar 1927West Wittering \ Q \ February1927-March1927  80
The condition of a No.3A Experimental Battery after service and testing.5th Mar 1927West Wittering \ Q \ February1927-March1927  81
Report from Peto & Radford comparing the performance of 9-plate and 7-plate battery cells.8th Mar 1927West Wittering \ Q \ February1927-March1927  82
Technical discussion on the suitability of a sleeve-type magneto for the 20 HP chassis.8th Mar 1927West Wittering \ Q \ February1927-March1927  83
Comparison of sleeve and rotating armature magneto performance, referencing the 20 HP, 40/50 HP, and E06 models.8th Mar 1927West Wittering \ Q \ February1927-March1927  84
Modifications to the R.O.1 magneto, its performance, and comparing the capabilities of suppliers.7th Mar 1927West Wittering \ Q \ February1927-March1927  85
Technical memo detailing the results of braking tests on model EAC-V11.7th Mar 1927West Wittering \ Q \ February1927-March1927  86
Steering geometry and the damped pendulum lever to avoid high-speed wobbles and 'shimmy'.14th Mar 1927West Wittering \ Q \ February1927-March1927  87
Steering system performance, issues like wobbles, and potential improvements.14th Mar 1927West Wittering \ Q \ February1927-March1927  88
Steering improvements related to friction, damping, springs, and the effect of an aluminium engine.1st Feb 1927West Wittering \ Q \ February1927-March1927  89
Preventing the overcharging of car accumulators by comparing gassing indicators with automatic switches.15th Mar 1927West Wittering \ Q \ February1927-March1927  90
Modifications to the charging and ignition system, including observations from road tests.15th Mar 1927West Wittering \ Q \ February1927-March1927  91
Road tests of the electrical auto-switch and charging system for various chassis.15th Mar 1927West Wittering \ Q \ February1927-March1927  92
Test report on the performance of an electrical switch and dynamo output under various car running conditions.20th Mar 1913West Wittering \ Q \ February1927-March1927  93
Technical description of an auto-switch for regulating battery charging and an experiment to reduce dynamo output.20th Mar 1913West Wittering \ Q \ February1927-March1927  94
The performance of the auto-charge reducing switch, incorporating customer feedback on the electrical system's behavior.21th Mar 1927West Wittering \ Q \ February1927-March1927  95
Tests and a proposed solution for problematic water pump glands on 20 HP and 40/50 HP chassis.21th Mar 1927West Wittering \ Q \ February1927-March1927  96
Blueprint of a modification for a 40/50 water pump, specifically showing spring-loaded asbestos rope glands.21th Mar 1927West Wittering \ Q \ February1927-March1927  97
Three experiments for a battery ignition system, involving an off-set cam and a new lever.23th Mar 1927West Wittering \ Q \ February1927-March1927  98
The unsatisfactory performance of English bodywork on continental roads, comparing it with French-built bodies.29th Mar 1927West Wittering \ Q \ February1927-March1927  99
Custom-made luggage box from Vitton's in Paris for a Phantom model.1st Mar 1927West Wittering \ Q \ February1927-March1927  100
The front seat comfort for three passengers and an update on receiving details for various body types.30th Mar 1927West Wittering \ Q \ February1927-March1927  101
Technical comparison of the Grav-Vac and Autovac vacuum petrol feed systems.30th Mar 1927West Wittering \ Q \ February1927-March1927  102
Performance comparison graph of Autovac and Grav-Vac petrol feed systems on a 20 HP engine.29th Mar 1927West Wittering \ Q \ February1927-March1927  103
Page with a purple date stamp from Derby.30th Mar 1927West Wittering \ Q \ February1927-March1927  104
Test bench performance of a Lorraine-Dietrich engine and its comparison to a 20 HP engine.30th Mar 1927West Wittering \ Q \ February1927-March1927  105
Performance analysis of a six-cylinder engine, detailing its compression, detonation, and power output compared to other models.30th Mar 1927West Wittering \ Q \ February1927-March1927  106
The performance of a twin Zenith carburetter setup, including a sketch of the induction system.30th Mar 1927West Wittering \ Q \ February1927-March1927  107
Description of an engine's offset cylinder 'desaxe' arrangement and induction pipe depression.23th Apr 1925West Wittering \ Q \ February1927-March1927  108
Comparison of engine valve gear, valve lift diagrams, and gas velocity characteristics.23th Apr 1925West Wittering \ Q \ February1927-March1927  109
Comparison of the Lorraine and Goshawk engines, focusing on gas velocity, mechanical efficiency, friction losses, and ignition systems.2nd Feb 1927West Wittering \ Q \ February1927-March1927  110
Analysis of engine performance, comparing spark advance, detonation, and cylinder head design with Hispano and other models.28th Nov 1928West Wittering \ Q \ February1927-March1927  111
Analysis of a 20 HP engine's power curves in comparison to a Lorraine engine, detailing an inlet valve with a detachable guide cage.28th Nov 1928West Wittering \ Q \ February1927-March1927  112
Report page on engine testing, detailing vibration analysis, valve performance, and general conclusions.25th Jan 1926West Wittering \ Q \ February1927-March1927  113
Comparison of the chief characteristics of the Lorraine engine with the 20 HP engine.25th Jan 1926West Wittering \ Q \ February1927-March1927  114
Report page discussing the use of large diameter valves with Lorraine carburetters.18th Aug 1927West Wittering \ Q \ February1927-March1927  115
Diagram comparing the exhaust valve lift of a Lorraine-Dietrich engine against a 20 HP R.R. engine.18th Aug 1927West Wittering \ Q \ February1927-March1927  116
Blank page with a purple date stamp from Derby.30th Mar 1927West Wittering \ Q \ February1927-March1927  117
Diagram comparing the inlet valve lift of a Lorraine-Dietrich engine and a 20hp R.R. engine.18th Mar 1927West Wittering \ Q \ February1927-March1927  118
Performance graph of mechanical efficiency and compression pressure curves for a Lorraine-Dietrich engine, compared to a 20 HP R.R. engine.21th Mar 1927West Wittering \ Q \ February1927-March1927  119
Graph comparing the power per unit cubic capacity and petrol consumption of a Lorraine-Dietrich engine and a 20 HP engine.16th Mar 1927West Wittering \ Q \ February1927-March1927  120
Power curve graph for a Lorraine-Dietrich engine with comparative data for a 20 HP R.R. engine.23th Mar 1927West Wittering \ Q \ February1927-March1927  121
Graph comparing the depression in the induction pipe for a Lorraine-Dietrich engine and a 20 HP R.R. engine.21th Mar 1927West Wittering \ Q \ February1927-March1927  122
Graph comparing necessary ignition advance versus engine RPM for Lighter Phantom and Lorraine-Dietrich engines.17th Mar 1927West Wittering \ Q \ February1927-March1927  123
Graph of curves showing gas velocity past the valves for a Lorraine-Dietrich engine, with a comparison to a 20 HP R.R. engine.25th Mar 1927West Wittering \ Q \ February1927-March1927  124
Graph comparing Indicated Horse Power and Indicated Mean Effective Pressure curves for a Lorraine-Dietrich and a 20 HP engine.25th Mar 1927West Wittering \ Q \ February1927-March1927  125
Blank page with a purple company stamp from the print room.30th Mar 1927West Wittering \ Q \ February1927-March1927  126
Graph of the inlet valve lift and piston displacement curve for a Lorraine-Dietrich engine.28th Mar 1927West Wittering \ Q \ February1927-March1927  127
Graph showing the inlet valve lift and piston displacement curve for a 20 HP engine.28th Mar 1927West Wittering \ Q \ February1927-March1927  128
Graph showing the power necessary to rotate a Lorraine-Dietrich engine, compared to a 20 HP R.R. engine.29th Mar 1927West Wittering \ Q \ February1927-March1927  129
Valve spring rating chart for a Lorraine-Dietrich engine.29th Mar 1927West Wittering \ Q \ February1927-March1927  130
Comparison of engine specifications between the Lorraine-Dietrich and a standard 20 HP engine.30th Mar 1927West Wittering \ Q \ February1927-March1927  131
Severely faded document with a purple ink stamp in the bottom right corner.30th Mar 1927West Wittering \ Q \ February1927-March1927  132
Requesting more detailed information and a drawing for a 'green lamp scheme' charge indicator before testing.30th Mar 1927West Wittering \ Q \ February1927-March1927  133
Design of spring clips, recommending a move away from clips made solid with the plate towards a simple forged and rivetted design.31th Mar 1927West Wittering \ Q \ February1927-March1927  134
Retaining a 20HP car for design reference and considering another chassis for engine trials.1st Jan 1927West Wittering \ Q \ January1927-March1927  1
Limitations of long chassis cars in congested traffic and the ride quality of shorter cars.1st Jan 1927West Wittering \ Q \ January1927-March1927  2
Policy on fitting a separate insulated junction box for battery connections on the frame.1st Jan 1927West Wittering \ Q \ January1927-March1927  3
Supply of Zeiss headlamps and a full-scale drawing for the 10 EX model.1st Jan 1927West Wittering \ Q \ January1927-March1927  4
Design of bonnet clips and locks, comparing existing models and suggesting improvements.5th Jan 1927West Wittering \ Q \ January1927-March1927  5
Technical memorandum discussing three different schemes for a bonnet lock on the 40/50 & 20HP models.10th Jan 1927West Wittering \ Q \ January1927-March1927  6
Design notes and diagrams for a bonnet locking mechanism, discussing the barrel, pinion, and locking plate.1st Feb 1927West Wittering \ Q \ January1927-March1927  7
Design notes and sketches for various bonnet fastener components and mechanisms.14th Feb 1927West Wittering \ Q \ January1927-March1927  8
Design considerations and modifications for a 40/50 model bonnet and radiator.10th Jan 1927West Wittering \ Q \ January1927-March1927  9
Design considerations and sketches for bonnet, radiator, and scuttle modifications, comparing integral and non-integral designs.1st Jan 1927West Wittering \ Q \ January1927-March1927  10
With diagrams proposing modifications to the radiator and bonnet shape for improved appearance.28th Feb 1927West Wittering \ Q \ January1927-March1927  11
Telegram regarding specifications for a new starter motor.4th Jan 1927West Wittering \ Q \ January1927-March1927  12
Request for a Phantom starter motor carcase and its components to use as a model.6th Jan 1927West Wittering \ Q \ January1927-March1927  13
Wiring arrangements and conductor size for a Phantom starter motor.5th Jan 1927West Wittering \ Q \ January1927-March1927  14
Comparing blueprints and thread standards for spherical seated unions.5th Jan 1927West Wittering \ Q \ January1927-March1927  15
Design scheme for bonnet clips featuring spring fingers and notes on materials and implementation.10th Jan 1927West Wittering \ Q \ January1927-March1927  16
Bonnet design modifications and urging a decision to be made.6th Jan 1927West Wittering \ Q \ January1927-March1927  17
Proposed linkage for the mixture control on the steering column for a 20HP vehicle.6th Jan 1927West Wittering \ Q \ January1927-March1927  18
Fitting front axle control and other modifications to an existing chassis.6th Jan 1927West Wittering \ Q \ January1927-March1927  19
Sketch and notes detailing the wiring scheme for the Phantom starter motor.5th Jan 1927West Wittering \ Q \ January1927-March1927  20
The potential difference in mechanical stiffness of battery ignition contact points between the RR and Remy models.6th Jan 1927West Wittering \ Q \ January1927-March1927  21
F.10 spring drive with a larger driving shaft and its application on supercharged engines.10th Jan 1927West Wittering \ Q \ January1927-March1927  22
Performance of battery ignition contact maker points and proposing investigations into their design.10th Jan 1927West Wittering \ Q \ January1927-March1927  23
Design modifications for the Phantom Sequence Starter No. 2 Scheme, including windings and carcase length.8th Jan 1927West Wittering \ Q \ January1927-March1927  24
Design, materials, and standardization of new pipe unions.12th Jan 1927West Wittering \ Q \ January1927-March1927  25
Letter to Messrs Hooper & Co Ltd chasing the completion and delivery date of a Phantom Experimental Cabriolet de Ville body.10th Jan 1927West Wittering \ Q \ January1927-March1927  26
Failure in the 20HP steering longitudinal tube and proposing a solution.14th Jan 1927West Wittering \ Q \ January1927-March1927  27
Correcting a figure for the shorter 40/50 bonnet and discussing suggestions for improving its appearance.11th Jan 1927West Wittering \ Q \ January1927-March1927  28
Returning an incorrect starter motor carcase that was missing its field coils.11th Jan 1927West Wittering \ Q \ January1927-March1927  29
Proposed modifications to the 40/50 model's bonnet and radiator, advocating for gradual change.27th Jan 1927West Wittering \ Q \ January1927-March1927  30
Proposed modifications to the 40/50 bonnet and radiator proportions.18th Jan 1927West Wittering \ Q \ January1927-March1927  31
The main field windings for a Phantom starter motor.11th Jan 1927West Wittering \ Q \ January1927-March1927  32
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