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
Eureka wire as an alternative to nichrome wire for the EAC silent starter gear.7th Oct 1924Box 64 \ 3  scan0011
Gap measurements for an automatic main switch and auxiliary switch.9th Oct 1924Box 64 \ 3  scan0012
Test report and improvement suggestions for a silent starter gear main and relay switch unit.15th Oct 1924Box 64 \ 3  scan0013
Required adjustments for springs, contacts, and a relay unit for further testing.15th Oct 1924Box 64 \ 3  scan0014
Potential modifications to a main switch, including its brush contact, air gaps, and lever.15th Oct 1924Box 64 \ 3  scan0015
Preliminary tests and required alterations for the EAC Silent Starter Gear.4th Nov 1924Box 64 \ 3  scan0016
Modifications to electrical windings for a motor, actuator coil, and relay switch unit.4th Nov 1924Box 64 \ 3  scan0017
Continued note regarding heavy current winding strips for a starter motor.20th Mar 1924Box 64 \ 3  scan0018
Two faults observed with the EAC.11 engine's electrical starter unit.20th Mar 1924Box 64 \ 3  scan0019
The EAC Silent Starter Gear, detailing circuit connections and the sequence of operations.7th Nov 1924Box 64 \ 3  scan0020
Preliminary bench tests on switch units and actuator box components.7th Nov 1924Box 64 \ 3  scan0021
Alterations to motor windings and bye-pass resistance for improved starting and reliability.7th Nov 1924Box 64 \ 3  scan0022
Technical memorandum discussing the operation of an actuator box and potential improvements to resolve an operational 'thump'.7th Nov 1924Box 64 \ 3  scan0023
Recommended alterations for a silent starter unit.20th Nov 1924Box 64 \ 3  scan0024
Secret memo regarding a cushion drive modification to eliminate a thump in the starter drive.20th Nov 1924Box 64 \ 3  scan0025
The replacement of the 'pot' type coupling and the adoption of a new starter for the 'W' Series engine.3rd Dec 1924Box 64 \ 3  scan0026
Wiring diagram of connections for a Sequence Silent Starter system.25th Jul 1928Box 64 \ 3  scan0027
Modifications to a fabric engine coupling and an epicyclic starter gear for 'V' series engines.1st Sep 1925Box 64 \ 3  scan0028
Modifications to gears and shafts for improved strength and bearing performance.10th Jan 1925Box 64 \ 3  scan0029
Design and requirements for a sequence starter, including fabric coupling, spring mechanism, and coil windings.10th Jan 1925Box 64 \ 3  scan0030
Request for information regarding the fitting of a Sequence Silent Starter to a 'W' Series Chassis.13th Jan 1925Box 64 \ 3  scan0031
Design and specifications for a sequence silent starter, including a sketch of the field pole core.13th Jan 1925Box 64 \ 3  scan0032
Modifications for a sequence silent starter, including the bendix shaft helix angle and motor windings.14th Jan 1925Box 64 \ 3  scan0033
Conditions for correct operation of the EAC silent starter gear, with circuit and resistance details.5th Mar 1925Box 64 \ 3  scan0034
Specification detailing the electrical operating conditions and resistance values for two circuits, including an actuator box and main switch.5th Mar 1925Box 64 \ 3  scan0035
Technical specifications for the correct operation of main and secondary electrical circuits, detailing current, voltage, and resistance requirements.5th Mar 1925Box 64 \ 3  scan0036
Description of Circuit 4 (Hold off) detailing the operation of a relay switch, current, resistance and voltage.1st Mar 1924Box 64 \ 3  scan0037
Specifications for the windings of an EAC Silent Starter unit.1st Mar 1924Box 64 \ 3  scan0038
EFC to RHC regarding an alteration to the EAC silent starter gear.9th Mar 1925Box 64 \ 3  scan0039
Ordering material for an alternative starter for the 'X' Series as the Sequence Starter is not being used.6th Aug 1925Box 64 \ 3  scan0040
Revised arrangement and construction of a silent starter motor scheme.23th Oct 1925Box 64 \ 3  scan0041
From R. to EFC. requesting a report on the Sequence Starter.17th Nov 1925Box 64 \ 3  scan0042
Revised advance report concerning the EAC silent starter gear.19th Nov 1925Box 64 \ 3  scan0043
Revised report on alterations made to an EAC silent starter system following trials.18th Nov 1925Box 64 \ 3  scan0044
'thump' sound during gear engagement, suggesting modifications to the gear ratio or motor windings.18th Nov 1925Box 64 \ 3  scan0045
Continued discussion on a fault feature observed in the 93-NK starting system.18th Nov 1925Box 64 \ 3  scan0046
Description of an electrical fault sequence involving the main switch, relay, and motor.18th Nov 1925Box 64 \ 3  scan0047
Adjustments and trial results for a relay circuit related to the starter motor.18th Nov 1925Box 64 \ 3  scan0048
From AJS to HS requesting parts for a starter drive test on an E.A.C. engine.23th Nov 1925Box 64 \ 3  scan0049
Recommendations and alterations for the sequence starter, including the actuator box switch and epicyclic gear.26th Nov 1925Box 64 \ 3  scan0050
Modification to a motor winding and the requirement for a new set of instructions for a switch.26th Nov 1925Box 64 \ 3  scan0051
Alterations to a Sequence Starter, a double switch unit, and a push button switch.20th Nov 1925Box 64 \ 3  scan0052
Technical memorandum discussing the design and improvement of a sequence starter mechanism.24th Nov 1925Box 64 \ 3  scan0053
Outlining the development status of various components for a sequence starter system.29th Dec 1925Box 64 \ 3  scan0054
Requesting proposals from West Wittering regarding previously outlined points.29th Dec 1925Box 64 \ 3  scan0055
The condition and proposed modifications for the Sequence Starter X.8650.4th Jan 1926Box 64 \ 3  scan0056
Outlining improvements for the new Phantom starter, model X.7650.6th Jan 1926Box 64 \ 3  scan0057
Requesting a sketch to clarify the placement of a parallel resistance in the EAC Silent Starter circuit.1st Sep 1926Box 64 \ 3  scan0058
D.O. diagram of connections for an EAC silent starter, detailing color-coded circuits and resistances.12th Jan 1926Box 64 \ 3  scan0059
Modification to a push-button switch for separate circuit feeding.12th Jan 1926Box 64 \ 3  scan0060
Alterations for the New Phantom sequence starter switch wiring and associated drawing updates.18th Jan 1926Box 64 \ 3  scan0061
Proposing a new, clearer electrical diagram for the Sequence Starter instruction book.30th Jan 1926Box 64 \ 3  scan0062
Best practices for arranging and color-coding circuits in radio diagrams.30th Jan 1926Box 64 \ 3  scan0063
Modifications to the New Phantom starter circuit diagram for the instruction book.3rd Feb 1926Box 64 \ 3  scan0064
Agreeing to suggestions for the New Phantom's sequence starter diagram and requesting the Drawing Office to update it.5th Feb 1926Box 64 \ 3  scan0065
Modifications and instructions for gearbox and engine starter systems.1st Mar 1926Box 64 \ 3  scan0066
Progress update on the design of a detachable dash, lighter clutch, propeller shaft, and gearbox modifications.26th May 1926Box 64 \ 3  scan0067
Instruction sheet regarding a delay on Silent Starter Units due to a material change from Bakelite to Ebonite for moulded parts.26th May 1926Box 64 \ 3  scan0068
Instruction to make up two sets of Sequence Starter Units for test, noting two motors were also handed for alteration.30th Jan 1926Box 64 \ 3  scan0069
Requesting the urgent completion and fitting of a modified silent flywheel starter to chassis 9-EX.4th Jun 1926Box 64 \ 3  scan0070
From 'R.' to 'EFC' requesting a progress report on the development of the sequence starter.10th Jun 1926Box 64 \ 3  scan0071
From EFC to FHC requesting a progress report on the development of the sequence silent starter, as requested by Mr. Royce.11th Jun 1926Box 64 \ 3  scan0072
Progress and alterations to the Sequence Silent Starter system.15th Jun 1926Box 64 \ 3  scan0073
Continued report on a revised combined switch unit being prepared for laboratory testing on chassis 9-EX.15th Jun 1926Box 64 \ 3  scan0074
The completion status of parts for a sequence starter and requesting further instructions.15th Jun 1926Box 64 \ 3  scan0075
Correcting the reduction ratios for the EAC starter motor, pinion to flywheel, and the total ratio.17th Jul 1926Box 64 \ 3  scan0076
From AJS to Hs regarding Mr. Royce's urgent request for the Goshawk I starter gear.23th Jul 1926Box 64 \ 3  scan0077
Confirming the starter's final reduction ratio and refuting a different value.9th Aug 1926Box 64 \ 3  scan0078
Request to investigate a sequence starter failure where the motor does not revolve or engage.13th Aug 1926Box 64 \ 3  scan0079
Starter motor particulars, including pinion thread angles and specifications.15th Aug 1926Box 64 \ 3  scan0080
Investigation into the occasional failure of a sequence starter, exploring issues of jamming and teazer current.17th Aug 1926Box 64 \ 3  scan0081
The design of a starter motor, including foot-operated versus hand-operated buttons and winding gauge specifications.17th Aug 1926Box 64 \ 3  scan0082
Experiments investigating starter motor jamming, focusing on the effect of increased voltage and Teazor torque.17th Aug 1926Box 64 \ 3  scan0083
Altering teeth and helix angles to resolve an operational jam.17th Aug 1926Box 64 \ 3  scan0084
Typed letter from F.H. Royce to Mr. Clarke regarding scheduling a visit.24th Aug 1926Box 64 \ 3  scan0085
From EFC to AJS regarding experimental information on a sequence starter.1st Sep 1926Box 64 \ 3  scan0086
Modifications to a sequence starter, focusing on issues with the spiral angle.1st Sep 1926Box 64 \ 3  scan0087
Solutions for starter motor engagement faults and its planned relocation.1st Sep 1926Box 64 \ 3  scan0088
Drawing for a spring drive for a sequence starter, showing modifications to an epicyclic gear case.1st Sep 1926Box 64 \ 3  scan0089
Requested photostat copy of a sequence starter diagram.8th Sep 1926Box 64 \ 3  scan0090
Confirming the decision not to wait for a new sequence starter for EAC.VII following a visit to West Wittering.10th Sep 1926Box 64 \ 3  scan0091
Clarifying the definitions and testing of 'helix angle' and 'spiral angle' for a starter.14th Sep 1926Box 64 \ 3  scan0092
The development and instructions for a sequence starter.21th Sep 1926Box 64 \ 3  scan0093
Requesting the setup of a test rig for sequence starter testing using scrap Phantom parts.21th Sep 1926Box 64 \ 3  scan0094
Blueprints, parts, and testing instructions for a Sequence Starter and Epicyclic Gear.29th Sep 1926Box 64 \ 3  scan0095
From EFC to AJS providing a progress update on the X.7650 Sequence Starter, noting a delay in results.29th Sep 1926Box 64 \ 3  scan0096
Trying a new simplified sequence starter on the 20 HP model as the current one is unsatisfactory.11th Feb 1926Box 64 \ 3  scan0097
Comparison table of experiments conducted on sequence starters.9th Nov 1926Box 64 \ 3  scan0098
Trials and modifications to a sequence starter scheme on an EAC.7 chassis.16th Dec 1926Box 64 \ 3  scan0099
Modifications to a switch mechanism to reduce thumping on gear engagement.6th Dec 1926Box 64 \ 3  scan0100
Modifications and testing of a sequence starter to resolve backlash and failure issues.6th Dec 1926Box 64 \ 3  scan0101
Testing various combinations of components for a sequence starter, including different spiral angles, switches, and buffers.25th Jan 1927Box 64 \ 3  scan0102
Experimental schemes involving spiral mechanisms, actuator boxes, and switches.26th Jan 1927Box 64 \ 3  scan0103
Request to the Experimental Shop to produce a 34° 52' spiral for use in sequence starter experiments.26th Jan 1927Box 64 \ 3  scan0104
Conditions for correct operation of the EAC silent starter gear.1st Feb 1927Box 64 \ 3  scan0105
Page 2 of a document detailing the conditions for correct operation of two electrical circuits.1st Feb 1927Box 64 \ 3  scan0106
Specifications for the operation of a main switch and associated electrical circuits.1st Feb 1927Box 64 \ 3  scan0107
Description of the operation of Circuit 4, the 'Hold Off' (Green) circuit, including resistance, voltage, and current specifications.2nd May 1927Box 64 \ 3  scan0108
New 'RR. sequence' starter motor system for the Phantom model.2nd May 1927Box 64 \ 3  scan0109
Various proposed combinations and testing for the No.1 scheme sequence starter.11th Jun 1927Box 64 \ 3  scan0110


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