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
Testing procedures for the oil relay ignition governor springs and freedom of movement.28th Jan 1925Box 65 \ 1  scan0072
Assembly and testing instructions for a governor, detailing spring settings and pull force specifications.28th Jan 1925Box 65 \ 1  scan0073
Instructions for setting and testing an Oil Relay Mechanism.28th Jan 1925Box 65 \ 1  scan0074
Instructions for fitting and troubleshooting an oil relay assembly and governor, including potential ignition issues.28th Jan 1925Box 65 \ 1  scan0075
List of potential faults and their causes related to piston, lever, and governor mechanisms.29th Jan 1925Box 65 \ 1  scan0076
Blueprint showing the approximate setting of eccentrics for a hand control linkage.29th Jan 1925Box 65 \ 1  scan0077
Graph showing oil relay lever angular movement against engine and governor RPM.31th Jan 1925Box 65 \ 1  scan0078
Objections to the Scintilla magneto and alternative ignition control systems for 'V' series engines.31th Jan 1925Box 65 \ 1  scan0079
Anxieties over engine detonations from a new head design with two governors and wide-apart plugs.31th Jan 1925Box 65 \ 1  scan0080
Testing procedure for rating governor torsion springs.28th Jan 1925Box 65 \ 1  scan0081
Secret memo regarding the testing of EAC Ignition Governor Springs to determine their rating and revise production limits.2nd Feb 1925Box 65 \ 1  scan0082
Containing a telegram discussing potential issues and improvements for a gearbox.2nd Feb 1925Box 65 \ 1  scan0083
Issues and improvements for the Relay Advance and Four Speed Box.2nd Mar 1925Box 65 \ 1  scan0084
Design improvements for pinions and shafts, including tooth angle and clearances.5th Feb 1925Box 65 \ 1  scan0085
Requesting to try stronger torsional springs for the EAC ignition governor.5th Feb 1925Box 65 \ 1  scan0086
Secret memorandum regarding the automatic advance ignition mechanism and a suggested design change.11th Feb 1925Box 65 \ 1  scan0087
List of compression springs that can be used in the Relay Crosshead for the Ignition Governor.16th Feb 1925Box 65 \ 1  scan0088
Magneto and requesting a modification for springs in the oil relay.26th Feb 1925Box 65 \ 1  scan0089
Tests to prevent the inner piston in the ignition relay from sticking due to oil impurities.28th Feb 1925Box 65 \ 1  scan0090
Operational certainty of an EAC oil relay governor mechanism.2nd Mar 1925Box 65 \ 1  scan0091
Instruction book page detailing the function, cleaning, and troubleshooting procedures for the oil relay.3rd Mar 1925Box 65 \ 1  scan0092
Instructions for dismantling a relay due to grit between the pistons.12th Mar 1925Box 65 \ 1  scan0093
Secret memo requesting suggestions for laboratory tests to justify a new automatic ignition control system.12th Mar 1925Box 65 \ 1  scan0094
Suggesting a cooler for the ignition oil relay to prevent damage from high temperatures during bench tests.18th Mar 1925Box 65 \ 1  scan0095
Oil relay governor ignition system, discussing advantages over other schemes and the benefits of synchronized dual spark plugs.18th Mar 1925Box 65 \ 1  scan0096
Oil relay governor ignition, explaining the phenomenon of engine detonation.17th Mar 1925Box 65 \ 1  scan0097
Engine detonation, proposing a dual ignition system as a solution for larger engines.17th Mar 1925Box 65 \ 1  scan0098
Dual ignition system with automatic advance via an oil relay.17th Mar 1925Box 65 \ 1  scan0099
Automatic ignition controls and the inspection of car 98-NK for joint improvements.23th Mar 1925Box 65 \ 1  scan0100
Request for figures for curves for springs E.73152 and E.73203, for the Ignition Governor.26th Mar 1925Box 65 \ 1  scan0101
The failure of an oil ignition relay due to a perished cup leather from high oil temperature.31th Mar 1925Box 65 \ 1  scan0102
Instruction to omit the troublesome spring ring from future Oil Relay parts.3rd Apr 1925Box 65 \ 1  scan0103
Request to test the durability of two different types of cup leather for an oil relay at various temperatures.1st Apr 1925Box 65 \ 1  scan0104
Removal of an oil relay ignition governor from a test rig for further testing.9th Apr 1925Box 65 \ 1  scan0105
Oil relay ignition governor, detailing performance issues and proposed solutions.6th Apr 1925Box 65 \ 1  scan0106
Modifying a governor's performance curve, providing a data table of engine RPM versus lever movement.6th Apr 1925Box 65 \ 1  scan0107
Investigations of the oil relay governor.21th Apr 1925Box 65 \ 1  scan0108
Modifications to the Oil Relay Ignition Governor, focusing on inner piston clearances and foreign matter filtration.25th Sep 1924Box 65 \ 1  scan0109
Modifications to engine ignition advance and control springs.25th Sep 1924Box 65 \ 1  scan0110
Issues with a magneto sticking and the failure of cup leathers.25th Sep 1924Box 65 \ 1  scan0111
The failure of cup leathers due to high oil temperatures and viscosity changes in engines.25th Sep 1924Box 65 \ 1  scan0112
Tests for an ignition oil relay leather piston ring.25th Sep 1924Box 65 \ 1  scan0113
Graph showing the viscosity of Price's Motorine 'C' at various temperatures.20th Apr 1925Box 65 \ 1  scan0114
Graph of the ignition advance curve for an ignition relay governor, plotted against engine RPM under extreme working conditions.20th Apr 1925Box 65 \ 1  scan0115
Ignition timing specifications for automatic control, magneto, and battery systems.14th May 1925Box 65 \ 1  scan0116
Confirming a production fix by soldering the ball end on the Oil Relay Ignition Governor plunger.22th Jun 1925Box 65 \ 1  scan0117
Two experimental methods for preventing crankcase gas leakage via the ignition governor.31th Aug 1925Box 65 \ 1  scan0118
Proposed modification to the ignition control for the 40/50HP Chassis.3rd Sep 1925Box 65 \ 1  scan0119
Instructing the replacement of a magneto and spring for the oil relay ignition control on car 98-NK.19th Jan 1926Box 65 \ 1  scan0120
Removing an inner spring from the oil ignition relay due to a reduction in magneto sleeve friction.12th Feb 1926Box 65 \ 1  scan0121
Tests on the efficiency of ignition controls and an ignition oil relay.16th Feb 1926Box 65 \ 1  scan0122
Piston efficiency tests, including a diagram of the test apparatus.16th Feb 1926Box 65 \ 1  scan0123
Test report comparing the performance of different piston types and analyzing relay power.16th Feb 1926Box 65 \ 1  scan0124
The efficiency of an oil relay, detailing tests on expanding rings and the power required to operate controls.16th Feb 1926Box 65 \ 1  scan0125
Explanation of the forces and operation of the magneto hand control relay and pressure piston.16th Feb 1926Box 65 \ 1  scan0126
Investigation into piston efficiency, magneto alternatives, and the characteristics of an oil relay and ignition governor.16th Feb 1926Box 65 \ 1  scan0127
Analysis of a pressure piston system, focusing on the relationship between load, cut-off gap, leaks, and effective pressure.16th Feb 1926Box 65 \ 1  scan0128
Page discussing the significance of oil pressure and its variation with speed, including a data table.17th Feb 1926Box 65 \ 1  scan0129
Sending two blueprints of a Piston Ring for an experiment on the 40/50HP Chassis Ignition Governor.17th Feb 1926Box 65 \ 1  scan0130
Engineering drawing for a hammered piston ring for a relay piston.16th Feb 1926Box 65 \ 1  scan0131
Using models of pointers and quadrants to establish a standard for setting controls on bodied cars.18th Feb 1926Box 65 \ 1  scan0132
Experiments and suggestions for the Phantom Automatic Ignition Advance system.10th Mar 1926Box 65 \ 1  scan0133
Comparison of two alternative springs for a 40/50HP chassis ignition governor, detailing load and stress.12th Mar 1926Box 65 \ 1  scan0134
The Phantom automatic ignition advance, discussing friction and noise in the magneto.13th Mar 1926Box 65 \ 1  scan0135
Continued page discussing the causes and solutions for noise originating from magneto sleeves and control linkages.13th Mar 1926Box 65 \ 1  scan0136
The testing and development of a Lucas magneto, including noise levels and proposed modifications.3rd Mar 1926Box 65 \ 1  scan0137
Progress report on machine modifications and chassis tests, specifically concerning Lucas magnetos.13th Mar 1926Box 65 \ 1  scan0138
Diagram of timing for a Watford E06 Sleeve Magneto No 73972 and its distributor.25th Mar 1926Box 65 \ 1  scan0139
Improvements to the magneto and relay motor for the Phantom Auto: Advance system.30th Mar 1926Box 65 \ 1  scan0140
Merits of Watford magnetos and modifications to the Phantom automatic advance mechanism.27th Mar 1926Box 65 \ 1  scan0141
Continued memorandum discussing servo motor performance in relation to oil pressure and the governor.27th Mar 1926Box 65 \ 1  scan0142
Magneto's automatic advance mechanism on a Phantom model.30th Mar 1936Box 65 \ 1  scan0143
Requesting modifications for an ignition governor oil relay to complete experiments.7th Apr 1926Box 65 \ 1  scan0144
Altered blueprints for the 40/50HP Chassis Ignition Governor, specifically lengthening the relay cylinder.12th Apr 1926Box 65 \ 1  scan0145
Confirming the dispatch of blueprints for springs related to the 40/50HP Chassis ignition governor and controls.14th Apr 1926Box 65 \ 1  scan0146
Outlining a proposed scheme for the Phantom Relay Advance system, complete with a performance graph.18th Apr 1926Box 65 \ 1  scan0147
Modifications for the Ignition Governor on a 40/50HP Chassis.26th Apr 1926Box 65 \ 1  scan0148
Accompanying two blueprints for 40/50HP Chassis Ignition Governor parts.30th Apr 1926Box 65 \ 1  scan0149
Modifications to the 40/50 HP chassis ignition governor, considering cost and implementation timing.3rd May 1926Box 65 \ 1  scan0150
Phantom's automatic advance mechanism, including magneto noise, relay pistons, and governor settings.4th May 1926Box 65 \ 1  scan0151
Continued discussion on governor mechanism inefficiency with a suggested modification to the governor springing.4th May 1926Box 65 \ 1  scan0152
Continued discussion on improvements to the relay piston, governor weights and spring arrangements.4th May 1926Box 65 \ 1  scan0153
Notes and a graph analyzing engine timing advance characteristics against engine revolutions.1st May 1926Box 65 \ 1  scan0154
Concluding remarks on engine control system improvements, focusing on governors, springs, and hydraulic cylinders.4th May 1926Box 65 \ 1  scan0155
New return spring for the 40/50HP Chassis Ignition Governor.13th May 1926Box 65 \ 1  scan0156
Issue with an oil relay lever fouling a piston and subsequent adjustments.1st May 1926Box 65 \ 1  scan0157
Modifications to ignition timing and components to resolve a production issue.14th May 1926Box 65 \ 1  scan0158
Alterations required for the ignition governor for the 12-EX engine.14th May 1926Box 65 \ 1  scan0159
Extract detailing improvements to the Phantom's auto advance system, including new timing instructions and piston modifications.14th May 1926Box 65 \ 1  scan0160
Alterations required for the ignition governor for the 12-EX engine.14th May 1926Box 65 \ 1  scan0161
Updates and issues with the Phantom's automatic ignition advance system, referencing drawings and test results.17th May 1926Box 65 \ 1  scan0162
Note detailing ignition advance mechanisms and proposed modifications for the Phantom model's ignition system.8th May 1926Box 65 \ 1  scan0163
Extract detailing suggested modifications to the ignition system for Phantom Chassis models X.8770, X.8685 and X.8680.8th May 1926Box 65 \ 1  scan0164
Requesting a spare Battery Ignition Tower for EFC.27th May 1926Box 65 \ 1  scan0165
Requesting a fitter to be sent to the Experimental Electrical Lab for a Phantom ignition tower governor test.5th Jun 1926Box 65 \ 1  scan0166
From R. to H.S. regarding improvements to the automatic advance mechanism.10th Jun 1926Box 65 \ 1  scan0167
The fitting of a Phantom ignition tower for a governor test.10th Jun 1926Box 65 \ 1  scan0168
Ignition controls, advance curves, and associated drawings LeC's 2262 and 2265.3rd Jul 1926Box 65 \ 1  scan0169
Scheme for carburettor mixture control and revisions to ignition controls.6th Jul 1926Box 65 \ 1  scan0170
Preliminary tests and modifications on a new type of oil relay.19th Jul 1926Box 65 \ 1  scan0171


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