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
Suggesting a different valve timing for the Sports Phantom to improve high-speed output, based on a comparison with a Lorraine engine.23th Apr 1927West Wittering \ Q \ April1927-June1927  30
Knocking brake complaint on a 20HP car, recommending fitting the flexible servo operation to all 20HP and Phantom models.25th Apr 1927West Wittering \ Q \ April1927-June1927  31
Proposed alteration to the carburetter's double float to improve airflow.25th Apr 1927West Wittering \ Q \ April1927-June1927  32
Selection of appropriate wheels and tyres for the 20HP model.25th Apr 1927West Wittering \ Q \ April1927-June1927  33
Design of a new front axle for the 20HP model, based on the characteristics of the lightened Phantom type.25th Apr 1927West Wittering \ Q \ April1927-June1927  34
Modification to the combined wheel carrier and luggage grid to prevent the wheel from climbing the plate.27th Apr 1927West Wittering \ Q \ April1927-June1927  35
Second standard front wheel brake axle design for the Phantom and 20HP models.29th Apr 1927West Wittering \ Q \ April1927-June1927  36
Need for a spring thrust collar on the servo to prevent shock and correcting the tendency to alter brake bedding for rough action.29th Apr 1927West Wittering \ Q \ April1927-June1927  37
The benefits of damping friction on the steering of the Phantom and 20HP models to avoid rattles.29th Apr 1927West Wittering \ Q \ April1927-June1927  38
Car dynamo design, specifically coil and slot configurations and the stamping of plates.29th Apr 1927West Wittering \ Q \ April1927-June1927  39
Performance of the Phantom engine in the 7-EX car and proposed modifications.29th Apr 1927West Wittering \ Q \ April1927-June1927  40
Design changes for bonnets and radiators, focusing on aesthetics and practicality.29th Apr 1927West Wittering \ Q \ April1927-June1927  41
Suitability of a rear luggage box and spare wheel carrier for a town carriage.29th Apr 1927West Wittering \ Q \ April1927-June1927  42
Suitability of different shock dampers for various driving conditions and chassis types.29th Apr 1927West Wittering \ Q \ April1927-June1927  43
On chassis lubrication, discussing issues with a new oil distribution system and a potential American-origin replacement being tested.29th Apr 1927West Wittering \ Q \ April1927-June1927  44
Outlining the proposal and rationale for creating the high-speed '10-EX Sports Model'.29th Apr 1927West Wittering \ Q \ April1927-June1927  45
Pressure on tungsten points for battery ignition and expressing dissatisfaction with progress on the unit.29th Apr 1927West Wittering \ Q \ April1927-June1927  46
Improvement of high-speed wobbles by reducing front axle weight.30th Apr 1927West Wittering \ Q \ April1927-June1927  47
Preference for the Enots 'Bowen' central lubrication system and requesting specimen parts for testing.30th Apr 1927West Wittering \ Q \ April1927-June1927  48
Inquiring about the long-term effectiveness of felt glands on valves and proposing an alternative design to reduce oil consumption.30th Apr 1927West Wittering \ Q \ April1927-June1927  49
Schemes for a proposed divided battery for the Phantom model.30th Apr 1927West Wittering \ Q \ April1927-June1927  50
Proposed experiment for the Phantom valve rocker gear to test valve seating noise.30th Apr 1927West Wittering \ Q \ April1927-June1927  51
Improvements and alterations to the 20HP steering geometry.30th Apr 1927West Wittering \ Q \ April1927-June1927  52
Cause of a steering 'joggle' in a 20HP car, comparing geometry issues versus gyroscopic action.30th Apr 1927West Wittering \ Q \ April1927-June1927  53
Engine performance improvements due to correctly sprung automatic ignition advance.2nd May 1927West Wittering \ Q \ April1927-June1927  54
New starter motor system for the Phantom model, termed 'RR. sequence'.2nd May 1927West Wittering \ Q \ April1927-June1927  55
State, issues, and proposed improvements for the Phantom steering system.3rd May 1927West Wittering \ Q \ April1927-June1927  56
Design of riveted road spring clips for the 40/50 and 20HP models.3rd May 1927West Wittering \ Q \ April1927-June1927  57
From R. to H.S. requesting a 20HP car for reference, preferably a Lorraine type with a specific crankshaft damper.3rd May 1927West Wittering \ Q \ April1927-June1927  58
Weight reduction on the Phantom's front end by modifying wing irons and front springs.3rd May 1927West Wittering \ Q \ April1927-June1927  59
Stiffening of camshafts to reduce sponginess in the brakes.5th Mar 1927West Wittering \ Q \ April1927-June1927  60
Sticking issue with the Phantom throttle and suggesting potential solutions.5th May 1927West Wittering \ Q \ April1927-June1927  61
Slow progress in improving the lifespan of battery ignition contact points on the Phantom and 20HP models.3rd May 1927West Wittering \ Q \ April1927-June1927  62
Proposed modifications for Phantom wing stays, wiring, and the bonnet catch.5th May 1927West Wittering \ Q \ April1927-June1927  63
Device for adding friction to the 'India Steering' column.5th May 1927West Wittering \ Q \ April1927-June1927  64
Flexible bracket design for a heat shield on an EAC.7 silencer.5th May 1927West Wittering \ Q \ April1927-June1927  65
Lowering the chassis frame by using a smaller back axle bevel gear and a hypoid gear.6th May 1927West Wittering \ Q \ April1927-June1927  66
Design and testing of spring clips.6th May 1927West Wittering \ Q \ April1927-June1927  67
Likely cause of a broken inlet valve on an Eagle 15 engine.6th May 1927West Wittering \ Q \ April1927-June1927  68
Road clearance on 20HP and 7-EX models, warning against reduction based on faults experienced in France.7th May 1927West Wittering \ Q \ April1927-June1927  69
Update on the status of various experimental designs for the Phantom and India models.7th May 1927West Wittering \ Q \ April1927-June1927  70
Experiments with the Phantom radiator and fan placement.9th May 1927West Wittering \ Q \ April1927-June1927  71
Sponginess in EAC.7 rear brakes and the implementation of scheme 2385 using stiffened camshafts.9th May 1927West Wittering \ Q \ April1927-June1927  72
Steering irreversibility and trials with different worm gear designs.11th May 1927West Wittering \ Q \ April1927-June1927  73
Mr. Lanchester's patent for a crankshaft damper in relation to the company's own prior art.11th May 1927West Wittering \ Q \ April1927-June1927  74
Issues with the Lucas magneto, ignition plugs, throttle, and magneto timing on the 7-EX model.11th May 1927West Wittering \ Q \ April1927-June1927  75
Experimental improvements to the Phantom steering system, including a new irreversible worm.12th May 1927West Wittering \ Q \ April1927-June1927  76
Specifying the requirements for a light-bodied 20HP reference car.13th May 1927West Wittering \ Q \ April1927-June1927  77
Clarifying technical terms and measurements for springs intended for Australia.13th May 1927West Wittering \ Q \ April1927-June1927  78
Modification to a spanner for the India steering friction device.13th May 1927West Wittering \ Q \ April1927-June1927  79
Problems with chassis work and a request to bring in specific vehicles.14th May 1927West Wittering \ Q \ April1927-June1927  80
Experimental design comments on the Phantom model.14th May 1927West Wittering \ Q \ April1927-June1927  81
Proposed design changes and standardizations for various vehicle components.14th May 1927West Wittering \ Q \ April1927-June1927  82
Speedometer drive squares twisting off due to the load from mechanically driven screen wipers, and a proposal to increase the drive square size to the B.E.S.A. standard.14th May 1927West Wittering \ Q \ April1927-June1927  83
Modifications to a starter motor for EAC.7 to improve the vigour of its end motion.16th May 1927West Wittering \ Q \ April1927-June1927  84
Conditions to improve the life of tungsten points in battery ignition systems.16th May 1927West Wittering \ Q \ April1927-June1927  85
Solutions for sticking crankshaft friction dampers in slipper drives.19th May 1927West Wittering \ Q \ April1927-June1927  86
Postponement of two EAC.7 geometry schemes in favour of more urgent steering experiments on the Phantom.20th May 1927West Wittering \ Q \ April1927-June1927  87
Lubrication and gear hardening for a 20HP RR Improved Bijur starter.23th May 1927West Wittering \ Q \ April1927-June1927  88
Requesting a drawing for the new 20HP wheel with a 19 inch rim.24th May 1927West Wittering \ Q \ April1927-June1927  89
Requesting information on the American installation of the Bijur central lubrication system on a Phantom.24th May 1927West Wittering \ Q \ April1927-June1927  90
Revisions for the EAC.7 engine, including liners and compression ratios.24th May 1927West Wittering \ Q \ April1927-June1927  91
Design modifications for Phantom luggage carriers and a petrol tank protecting grid.24th May 1927West Wittering \ Q \ April1927-June1927  92
From 'R' outlining eleven car development objectives for a board meeting.25th May 1927West Wittering \ Q \ April1927-June1927  93
The suitability of a chassis recently returned from France for a Hooper fixed cabriolet.25th May 1927West Wittering \ Q \ April1927-June1927  94
Proposing a simpler method for ignition wiring by running the high-tension conductors through round tubes.26th May 1927West Wittering \ Q \ April1927-June1927  95
Drawing LeC. 2417 for modified top water pipe connections to meet Air Ministry specifications.26th May 1927West Wittering \ Q \ April1927-June1927  96
Modification to the Phantom magneto coupling to aid in timing adjustment.26th May 1927West Wittering \ Q \ April1927-June1927  97
Request to prepare a design scheme for applying rubber-enclosed glands to water pipe connections.26th May 1927West Wittering \ Q \ April1927-June1927  98
Experimental self-centering spring and friction device for the Phantom steering system.26th May 1927West Wittering \ Q \ April1927-June1927  99
Merits of the Phantom and 20HP clutches compared to older cone clutch models, addressing issues of cost and materials.27th May 1927West Wittering \ Q \ April1927-June1927  100
The accessibility of shock dampers and a proposed lever alteration for the Axle Control on a Phantom & EAC 7.27th May 1927West Wittering \ Q \ April1927-June1927  101
Inquiring about 'petroflex' or other flexible tubing for central lubrication connections between the frame and axle.28th May 1927West Wittering \ Q \ April1927-June1927  102
Design improvements for Lovejoy shock dampers, specifically regarding strap connections and linking mechanisms.30th May 1927West Wittering \ Q \ April1927-June1927  103
Undershield alterations and the decision to revise an engine design rather than standardise its current form.31th May 1927West Wittering \ Q \ April1927-June1927  104
Preliminary scheme for a revised dry liner aluminium Phantom engine.1st Jun 1927West Wittering \ Q \ April1927-June1927  105
Calculations for stress in the bolts of a pedestal piston and proposing design modifications.1st Jun 1927West Wittering \ Q \ April1927-June1927  106
Proposed design for a Phantom side spare wheel carrier, referencing scheme 2420.4th Jun 1927West Wittering \ Q \ April1927-June1927  107
Requesting experimental trials of induction pipe manifolds for the revised Phantom model.7th Jun 1927West Wittering \ Q \ April1927-June1927  108
Two schematic diagrams illustrating alternative manifold connection layouts.4th Jun 1927West Wittering \ Q \ April1927-June1927  109
Design improvements for the No. 2 Sequence Starter Motor, including winding, armature size, and efficiency.8th Jun 1927West Wittering \ Q \ April1927-June1927  110
Ignition switch positions for the Phantom model and proposing an electromagnetic safety device for the dynamo charging circuit.8th Jun 1927West Wittering \ Q \ April1927-June1927  111
High-speed resistance in hydraulic shock dampers and proposing methods for analysis.9th Jun 1927West Wittering \ Q \ April1927-June1927  112
Improvements to the battery ignition contact maker, including distributor and condenser connection modifications.10th Jun 1927West Wittering \ Q \ April1927-June1927  113
Patented method to reduce rattles in road spring attachments, with a request to test the scheme.10th Jun 1927West Wittering \ Q \ April1927-June1927  114
Modifications to an Enots pump for a centralised chassis lubrication system.11th Jun 1927West Wittering \ Q \ April1927-June1927  115
Design choices for a sequence starter motor, including gear ratio and armature specifications.11th Jun 1927West Wittering \ Q \ April1927-June1927  116
Bosch starter sequence motor.1st Jun 1944West Wittering \ Q \ April1927-June1927  117
Design and features of the improved No. 2B scheme sequence starter motor.14th Jun 1927West Wittering \ Q \ April1927-June1927  118
Testing for a front axle control system and a potential issue with the exhaust pipe.15th Jun 1927West Wittering \ Q \ April1927-June1927  119
From R to EFC regarding testing an engine starter.16th Jun 1927West Wittering \ Q \ April1927-June1927  120
Need to improve the lifespan of tungsten points used in battery ignition systems.18th Jun 1927West Wittering \ Q \ April1927-June1927  121
Scheme 2425 for centralised chassis lubrication of the rear springs and footbrake differential.18th Jun 1927West Wittering \ Q \ April1927-June1927  122
From 'R' to 'BJ' regarding the cost, appearance, and cooling of 40/50 bonnet shutters and louvres.23th Jun 1927West Wittering \ Q \ April1927-June1927  123
Modifications to the front exhaust pipe for the front axle control by shock damper.24th Jun 1927West Wittering \ Q \ April1927-June1927  124
Pencil sketch of a dual exhaust manifold assembly.25th Jun 1927West Wittering \ Q \ April1927-June1927  125
Design and fitting of stiffer chassis springs for cars in Australia.24th Jun 1927West Wittering \ Q \ April1927-June1927  126
Effects of weight distribution on a car's riding qualities and recommending placement of components.24th Jun 1927West Wittering \ Q \ April1927-June1927  127
Phantom front axle control, exhaust pipe standardisation, and a request for experimental testing.25th Jun 1927West Wittering \ Q \ April1927-June1927  128
Improvements to Phantom cylinder blocks to avoid distortion and piston knocks, referencing issues with American production.25th Jun 1927West Wittering \ Q \ April1927-June1927  129
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