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
Design modifications and ordering of hypoid rear axle gears with different offsets.25th Jun 1927West Wittering \ Q \ April1927-June1927  130
Defect in Phantom cylinder block castings and potential solutions.25th Jun 1927West Wittering \ Q \ April1927-June1927  131
On an investigation into a sticking 20HP starter mechanism, suggesting improvements to springs, washers, and lubrication.29th Jun 1927West Wittering \ Q \ April1927-June1927  132
Proposing a visit to W.W. with an RAC-V11 chassis for examination.1st Dec 1926West Wittering \ Q \ December1926-January1927  1
Comments received on the performance and issues of the Packard 8-cylinder engine.1st Dec 1926West Wittering \ Q \ December1926-January1927  2
Continued technical comparison of engine balance between straight-eight and six-cylinder engines.6th Dec 1926West Wittering \ Q \ December1926-January1927  3
Suitability of chamois leather petrol filters, particularly when used with benzol fuel.1st Dec 1926West Wittering \ Q \ December1926-January1927  4
Road performance test report on a Packard 8-cylinder engine, focusing on crankshaft vibration periods.1st Dec 1926West Wittering \ Q \ December1926-January1927  5
Road test report page criticising an eight-cylinder car's engine roughness, distressing steering, and inefficient brakes.15th Dec 1926West Wittering \ Q \ December1926-January1927  6
Performance observations on a vehicle's clutch, suspension, and single-point lubrication system.24th Dec 1926West Wittering \ Q \ December1926-January1927  7
Performance improvements on a 20 HP car following various modifications.1st Dec 1926West Wittering \ Q \ December1926-January1927  8
Concluding page of a report comparing performance figures for a modified 20 HP engine against the 40/50 HP and standard Phantom models.17th Jan 1927West Wittering \ Q \ December1926-January1927  9
Two graphs comparing vehicle acceleration performance: Rolls Royce vs Bentley, and High vs Low Axle Ratio on a Phantom.10th Dec 1926West Wittering \ Q \ December1926-January1927  10
Stamped blank page, likely a cover or separator sheet.3rd Dec 1926West Wittering \ Q \ December1926-January1927  11
Two graphs comparing the acceleration of various car models and configurations.27th Jan 1927West Wittering \ Q \ December1926-January1927  12
Performance comparison graphs for the 20 HP model, showing acceleration and velocity with different engine configurations.31th Jan 1927West Wittering \ Q \ December1926-January1927  13
Mostly blank or faded document page with a 'Print Room' stamp.3rd Dec 1926West Wittering \ Q \ December1926-January1927  14
Automatic electro-magnetic switch for reducing the rate of dynamo charge.4th Dec 1926West Wittering \ Q \ December1926-January1927  15
Electrical system tests for 20 HP and 40/50 HP models, discussing test setup modifications and dynamo output curves.4th Dec 1926West Wittering \ Q \ December1926-January1927  16
Report discussing the testing and advantages of a ballast resistance unit for the ignition system, referencing previous reports on the subject.4th Dec 1926West Wittering \ Q \ December1926-January1927  17
Page discussing the deterioration of batteries due to over-filling, over-discharging, and incorrect charging methods.4th Dec 1926West Wittering \ Q \ December1926-January1927  18
Vibrator regulator and its effect on major and minor output curves for battery charging.4th Dec 1926West Wittering \ Q \ December1926-January1927  19
Simplified diagram of the connections of a chassis electrical system.1st Dec 1926West Wittering \ Q \ December1926-January1927  20
Wiring diagram for an electro-magnetic field resistance inserting switch unit for a chassis dynamo.9th Dec 1926West Wittering \ Q \ December1926-January1927  21
Blank page with a rectangular ink stamp in the bottom right corner.9th Dec 1926West Wittering \ Q \ December1926-January1927  22
Comparison of the operation and adjustments for a voltmeter, mentor, and automatic switch.27th Oct 1926West Wittering \ Q \ December1926-January1927  23
Miscellaneous observations on inserting a resistance into a field circuit.8th Nov 1926West Wittering \ Q \ December1926-January1927  24
The adjustment and operating voltages of an automatic regulating switch.8th Nov 1926West Wittering \ Q \ December1926-January1927  25
Test report on a 20 HP Dynamo Output Controller.11th Nov 1926West Wittering \ Q \ December1926-January1927  26
Performance graph showing the Ampere Output and Operating Voltages of a Phantom Dynamo at various speeds.10th Dec 1926West Wittering \ Q \ December1926-January1927  27
Reverse side of a document showing a 'Print Room' stamp from Derby.10th Dec 1926West Wittering \ Q \ December1926-January1927  28
Trial of a sequence starter scheme, detailing issues with a 20° spiral and a subsequent switch modification.6th Dec 1926West Wittering \ Q \ December1926-January1927  29
Modifications to a gear engagement mechanism to reduce noise and improve function.6th Dec 1926West Wittering \ Q \ December1926-January1927  30
Modifications to a sequence starter to resolve backlash and switch contact issues.1st Dec 1926West Wittering \ Q \ December1926-January1927  31
Proposed alterations to the 40/50 front braking system and comparing different schemes.9th Dec 1926West Wittering \ Q \ December1926-January1927  32
Blueprint detailing the brake distribution for a 40/50 model, comparing old, new, and proposed modifications.9th Dec 1926West Wittering \ Q \ December1926-January1927  33
Mostly blank document page with a red date and reference stamp in the bottom right corner.9th Dec 1926West Wittering \ Q \ December1926-January1927  34
On tests of a new ignition oil relay with metal piston rings, including proposed ignition advance curves for Phantom and other engines.9th Dec 1926West Wittering \ Q \ December1926-January1927  35
Adjustments to a piston assembly and spring tensions for a magneto relay.9th Dec 1926West Wittering \ Q \ December1926-January1927  36
Graph plotting ignition advance on the flywheel against engine RPM for an oil relay.10th Dec 1926West Wittering \ Q \ December1926-January1927  37
Tests of different 'turbulent' type heads on the Lighter Phantom engine to reduce detonation and continued firing after ignition switch-off.10th Dec 1926West Wittering \ Q \ December1926-January1927  38
Engine tests comparing performance with different clearances and cylinder head designs, focusing on detonation and ignition.1st Dec 1926West Wittering \ Q \ December1926-January1927  39
Engine performance, discussing compression ratios, detonation, and ignition characteristics for various car models.1st Dec 1926West Wittering \ Q \ December1926-January1927  40
Report page discussing engine performance related to spark timing, detonation, and self-ignition.1st Dec 1926West Wittering \ Q \ December1926-January1927  41
Engine self-ignition tests comparing a standard engine with a new head, and further experiments with smaller valves.1st Dec 1926West Wittering \ Q \ December1926-January1927  42
Summary of engine tests on the lighter Phantom engine, comparing valve sizes and ignition advance.1st Dec 1926West Wittering \ Q \ December1926-January1927  43
Preparations for road and bench tests on three different cylinder heads to analyze engine detonation.1st Dec 1926West Wittering \ Q \ December1926-January1927  44
Graph plotting Ignition Advance against B.M.E.P. curves at 1000 R.P.M. for various Aluminium Phantom engine configurations.10th Dec 1920West Wittering \ Q \ December1926-January1927  45
The back of a photograph with a date stamp.10th Dec 1920West Wittering \ Q \ December1926-January1927  46
Graph of ignition advance curves for various Phantom engine configurations, plotting ignition advance against engine RPM.2nd Dec 1926West Wittering \ Q \ December1926-January1927  47
Power comparison graph for an Aluminium Phantom engine, testing large versus small diameter valves.16th Dec 1926West Wittering \ Q \ December1926-January1927  48
Graph of Ignition Advance versus B.M.E.P. curves for an Aluminium Phantom engine at 1000 R.P.M.1st Dec 1926West Wittering \ Q \ December1926-January1927  49
Blueprint showing a cross-section of smaller diameter valves for the Lighter Phantom Engine.30th Sep 1926West Wittering \ Q \ December1926-January1927  50
Largely illegible document marked with a 'Print Room' stamp from Derby.10th Dec 1930West Wittering \ Q \ December1926-January1927  51
Disadvantages of a new type of hydraulic shock damper compared to the standard model.10th Dec 1926West Wittering \ Q \ December1926-January1927  52
List of experimental electrical items fitted to chassis 7-EX.10th Dec 1926West Wittering \ Q \ December1926-January1927  53
The 10,000-mile test of an experimental J-type N.B. dynamo, detailing issues with brush noisiness.10th Dec 1926West Wittering \ Q \ December1926-January1927  54
Brush noisiness in five machines, attributing the issue to commutator irregularity.10th Dec 1926West Wittering \ Q \ December1926-January1927  55
Examination report of an N.B. Dynamo J after a 10,000 miles test.27th Nov 1926West Wittering \ Q \ December1926-January1927  56
Tests to eliminate brake squeaks on the 40/50 HP model by modifying the brake shoe.15th Dec 1926West Wittering \ Q \ December1926-January1927  57
Performance of duralumin brake shoes and the effectiveness of drum dampers.15th Dec 1926West Wittering \ Q \ December1926-January1927  58
Blueprint detailing a modification to brake shoes to cure squeaks.15th Dec 1926West Wittering \ Q \ December1926-January1927  59
Two-page document with faint, illegible text on the right page and a date stamp in the bottom right corner.15th Dec 1926West Wittering \ Q \ December1926-January1927  60
Blueprints of performance curves for a 20 HP dynamo fitted with an automatic electro-magnetic switch.21th Dec 1926West Wittering \ Q \ December1926-January1927  61
Graph showing dynamo output curves for a 20 HP model under different conditions.20th Dec 1926West Wittering \ Q \ December1926-January1927  62
Blank page with a company date stamp from the print room.20th Dec 1926West Wittering \ Q \ December1926-January1927  63
Testing and performance of a Hobson K-S petrol level indicator on experimental cars.24th Dec 1926West Wittering \ Q \ December1926-January1927  64
Typed document discussing indicators for an instrument board with a handwritten annotation.1st Feb 1927West Wittering \ Q \ December1926-January1927  65
Short summary of a report on tests of platinum and tungsten battery ignition contact breaker points.24th Dec 1926West Wittering \ Q \ December1926-January1927  66
Comparative tests of different materials for battery ignition contact points.24th Dec 1926West Wittering \ Q \ December1926-January1927  67
The comparative analysis and testing of tungsten contact points from various suppliers.24th Dec 1926West Wittering \ Q \ December1926-January1927  68
Tests on ignition contact points using various materials, components, and arrangements.24th Dec 1926West Wittering \ Q \ December1926-January1927  69
Page from a report detailing comparative tests on ignition components like coils, condensers, and contact points.24th Dec 1926West Wittering \ Q \ December1926-January1927  70
Improvements in contact breaker springs, comparing them to a Delco-Remy design.24th Dec 1926West Wittering \ Q \ December1926-January1927  71
The differences between a Delco-Remy contact breaker and a proprietary one, with details of ongoing ignition system tests.24th Dec 1926West Wittering \ Q \ December1926-January1927  72
Ignition system testing, analysing misfiring issues and comparing results with a Delco-Remy system.23th Dec 1926West Wittering \ Q \ December1926-January1927  73
Results of tests on platinum points under various conditions.23th Dec 1926West Wittering \ Q \ December1926-January1927  74
Results of a series of tests on tungsten points for contact breakers.18th Sep 1926West Wittering \ Q \ December1926-January1927  75
Continued list detailing the conditions and outcomes of experiments on ignition system components.18th Sep 1926West Wittering \ Q \ December1926-January1927  76
The adoption of spherical unions as an improvement over the standard ones.29th Dec 1926West Wittering \ Q \ December1926-January1927  77
Chassis length and bonnet shortening for an eight-cylinder car.29th Dec 1936West Wittering \ Q \ December1926-January1927  78
Eight-in-line engine and the future need for smaller cars and shorter engines due to traffic congestion.1st Dec 1926West Wittering \ Q \ December1926-January1927  79
Analysis of car chassis dimensions and engine configurations, considering alternatives for future models.1st Dec 1926West Wittering \ Q \ December1926-January1927  80
V8 engine design considerations, including comparisons with a Packard model.12th Dec 1926West Wittering \ Q \ December1926-January1927  81
Bonnet dimensions and issues with the appearance of a radiator with integral shutters.12th Dec 1926West Wittering \ Q \ December1926-January1927  82
Blueprint detailing bonnet dimensions for four different vehicle series.30th Dec 1926West Wittering \ Q \ December1926-January1927  83
Faint and almost entirely illegible document with a Print Room stamp.30th Dec 1926West Wittering \ Q \ December1926-January1927  84
From EFC to AJS confirming the starter motor X.7625 is O.K. following a telegram.4th Jan 1927West Wittering \ Q \ December1926-January1927  85
Technical and cost implications of using narrower brushes for the EAC.7 starter motor.5th Jan 1927West Wittering \ Q \ December1926-January1927  86
Proposal to standardise an adjustable idler gear mounting for 20 HP cars following a 14,000-mile test.1st Jan 1927West Wittering \ Q \ December1926-January1927  87
Arrangement of a floating idler gear assembly.6th Jan 1927West Wittering \ Q \ December1926-January1927  88
Winding specifications and construction of a Phantom sequence starter motor.7th Jan 1927West Wittering \ Q \ December1926-January1927  89
Results of high speed tests on a finer primary winding coil.17th Jan 1927West Wittering \ Q \ December1926-January1927  90
Test report on a finer primary coil for the Phantom test bed engine.7th Jan 1927West Wittering \ Q \ December1926-January1927  91
Experiments on charging batteries to the characteristic V = 17 - .25 A.1st Jan 1927West Wittering \ Q \ December1926-January1927  92
Performance tests on various battery types, measuring charging and discharging characteristics.1st Jan 1927West Wittering \ Q \ December1926-January1927  93
Results of battery charging and discharging tests.14th Jan 1927West Wittering \ Q \ December1926-January1927  94
Bench testing and dispatch of a Delco-Remy distributor and contact breaker sample.14th Jan 1927West Wittering \ Q \ December1926-January1927  95
Crankshaft torsional vibrations, the General Motors Harmonic Balancer, and related investigations.1st Jan 1927West Wittering \ Q \ December1926-January1927  96
Letter from General Motors regarding the principles and study of a crankshaft harmonic balancer.15th Dec 1926West Wittering \ Q \ December1926-January1927  97
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