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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Price increase and testing of H.T. cable for 20 HP and 40/50 HP chassis.10th May 1926Box 168 \ 1  img030
Instructions for an environmental exposure test on 'Maconite' H.T. ignition cable.11th May 1926Box 168 \ 1  img031
Instructions for a three-month outdoor exposure test comparing a standard H.T. ignition cable with a Maconit sample.29th Jun 1929Box 168 \ 1  img032
The flammability and softening temperature of Maconita insulated H.T. cables for chassis.14th May 1926Box 168 \ 1  img033
Complaint and testing of 'Maconite' High Tension Cable.14th May 1926Box 168 \ 1  img034
On the testing of Maconitematerial, suggesting further experiments on other wires.15th May 1926Box 168 \ 1  img035
Laboratory report on the effects of heating two samples of high tension cable in an air bath.17th May 1926Box 168 \ 1  img036
Cover note for a report on experiments with 'Maconite' insulated H.T. cables for chassis.21th May 1926Box 168 \ 1  img037
The heat and flammability tests of Maconinte H.T. Ignition Cable compared to a standard cable.19th May 1926Box 168 \ 1  img038
Suggesting a comparative test for Maconitem insulated cables due to past issues with H.T. cable insulation rotting and cracking.26th May 1926Box 168 \ 1  img039
Further tests on Macon insulated cables and sending a sample for an expert opinion.28th May 1926Box 168 \ 1  img040
The testing and evaluation of a sample of Maconit H.T. cable.28th May 1926Box 168 \ 1  img041
Proposal to modify the ignition wiring on specific chassis to test MaconIte H.T. cable.4th Jun 1926Box 168 \ 1  img042
Comparative testing of Maconites insulated H.T. cables against standard types for chassis wiring.8th Jun 1926Box 168 \ 1  img043
High voltage test report comparing the merits of Maconite, Glover's, and Helsby ignition cables.7th Jun 1926Box 168 \ 1  img044
Correspondence regarding manufacturing differences in two samples of Maconita H.T. Cable from supplier W.T. Glover & Co. Ltd.9th Jun 1926Box 168 \ 1  img045
Letter from W.T. Glover & Co. Ltd. discussing cable samples and their specifications.8th Jun 1926Box 168 \ 1  img046
Cover letter for a report on comparative tests of Maconita H.T. insulating cable.2nd Sep 1926Box 168 \ 1  img047
Test report comparing the insulation properties of 'Maconite' and 'Glover' H.T. ignition cables after atmospheric exposure.31th Aug 1926Box 168 \ 1  img048
Order for Maconité H.T. cable, referencing a previous returned order.21th Jan 1927Box 168 \ 1  img049
Request to remove and inspect Macon-ite H.T. wires from chassis 12-EX, replacing them with standard Glover cable.21th Jan 1927Box 168 \ 1  img050
Supply of Maconite H.T. cable for a 10,000 mile test on a 20 HP chassis 10-GIII.15th Feb 1927Box 168 \ 1  img051
Comparative destructive testing of H.T. wires from chassis 11-GLII.5th Apr 1927Box 168 \ 1  img052
Instructions to replace and continue testing Maconit H.T. wires after a 20,000-mile test.23th May 1927Box 168 \ 1  img053
Comparative testing and costs of H.T. ignition cables from various suppliers.8th Dec 1927Box 168 \ 1  img054
Collection of Maconite and Glover H.T. ignition cables from various test cars for comparative laboratory testing.12th Dec 1927Box 168 \ 1  img055
Confirming the replacement of Maconite wires with standard Glover wires on engine 10-G3.8th Dec 1927Box 168 \ 1  img056
Comparing the prices of 'Maconite' and 'Glover's' H.T. ignition cables and arranging for test samples to be sent.24th Jan 1928Box 168 \ 1  img057
Instructions detailing the results of tests on chassis H.T. ignition cables.28th Apr 1928Box 168 \ 1  img058
Test report on the mileage and electrical properties of 'Maconite' and 'Glover' wires.8th Dec 1924Box 168 \ 1  img059
The physical condition of cable samples and the procedure for electrical breakdown testing.9th Dec 1924Box 168 \ 1  img060
High voltage breakdown tests comparing the performance of 'Maconite' and 'Glover' materials.9th Dec 1924Box 168 \ 1  img061
Instruction note regarding the comparative testing and standardisation of H.T. ignition cables.8th Dec 1924Box 168 \ 1  img062
The laboratory testing and suitability of Maconinte H.T. cable for chassis use, comparing it to standard Glover cable.2nd May 1928Box 168 \ 1  img063
Comparative testing of Maconites and standard Glover insulated cables for use as H.T. wire.2nd May 1928Box 168 \ 1  img064
The comparative testing of various electrical cables, including 'Gloverite', 'Super-Glover H.T.', 'Helsby' and 'Maconite' types.2nd May 1928Box 168 \ 1  img065
Examination and observation report on the condition of various H.T. ignition cables after extensive mileage.2nd May 1928Box 168 \ 1  img066
Results of electrical breakdown tests conducted on various cable samples, comparing 'Glover' and 'Maconite' types.2nd May 1928Box 168 \ 1  img067
The quality of H.T. ignition cables, recommending the standardisation of Maconites cable for the present.19th Apr 1926Box 168 \ 1  img068
Electrical experimental record sheet for 'Maconite' high tension wires.19th Apr 1926Box 168 \ 1  img069
Experimental record sheet for 'Maconite' high tension wires.19th Apr 1926Box 168 \ 1  img070
Experimental record sheet for 'Maconite' high tension wires, tracking mileage and tests.19th Apr 1926Box 168 \ 1  img071
Electrical experimental record sheet for 'Macomite' High Tension wires.19th Apr 1926Box 168 \ 1  img072
The quality testing of Glover H.T. cable and comparing its performance to Maconite cable.3rd May 1928Box 168 \ 1  img073
Test report on two samples of Glover H.T. cable which were found to be of poor quality after voltage testing.3rd May 1928Box 168 \ 1  img074
Standardisation of 'Maconite' insulated H.T. wires for chassis parts.14th May 1928Box 168 \ 1  img075
The standardisation of chassis parts, including implementation questions and an approval table.24th Mar 1938Box 168 \ 1  img076
Comparing the performance and price of different electrical cables.1st Jun 1928Box 168 \ 1  img077
Confirming the outside diameter of the Maconite H.T. cable is the same as the Glover cable currently in use.1st Jun 1928Box 168 \ 1  img078
Quality testing of a Maconit chassis H.T. cable following a failure.1st Oct 1928Box 168 \ 1  img079
Voltage test results for production Maconite H.T. cable.22th Oct 1928Box 168 \ 1  img080
Experimental record sheet for H.T. wires and cables, tracking mileage and test results.2nd Nov 1928Box 168 \ 1  img081
Proposal for alternative ignition wire tubing materials, metal or bakelite, for the Phantom II model.9th Dec 1929Box 168 \ 1  img082
Specification for the present standard H.T. Maconite covered wire.11th Dec 1929Box 168 \ 1  img083
Test results for eleven samples of production Maconit H.T. cable after water immersion.21th Jan 1930Box 168 \ 1  img084
Proposal to change Phantom II ignition wire tubes from steel with vulcanite to aluminium with a paper lining.14th Jan 1930Box 168 \ 1  img085
Test report for Maconites chassis high-tension ignition cable.14th Mar 1930Box 168 \ 1  img086
New and replaced drawings for wire fitting aluminium tubes on the 40/50HP chassis.11th Feb 1930Box 168 \ 1  img087
Critiquing the design of Phantom II ignition wire tubes and proposing improvements.25th Feb 1930Box 168 \ 1  img088
Extract from Mr. Hancock's report on vehicle 23-EX after 5,000 miles, concerning ignition wires and aluminium tubes.4th May 1930Box 168 \ 1  img089
Prints of new parts for the 40/50HP & L.H.S.S. Chassis wire fittings.13th May 1930Box 168 \ 1  img090
Extract from Mr. Hancock's report on the condition of ignition wires and tubes on vehicle 23-EX after 9,000 miles.21th May 1930Box 168 \ 1  img091
Decision to omit paper lining from the wiring tubes on the L.H. Phantom Chassis.22th May 1930Box 168 \ 1  img092
Phantom II ignition wire damage from exhaust heat and proposed remedies.5th Jun 1930Box 168 \ 1  img093
Suggestion to use enamelled aluminium H.T. wiring tubes for the 20 HP chassis.23th Jun 1930Box 168 \ 1  img094
Recommendation to use Super Glover H.T. cable as a substitute for Maconites H.T. cable.24th Jun 1930Box 168 \ 1  img095
Standardisation of chassis parts for aluminium ignition tubes without ebonite covering.11th Jun 1930Box 168 \ 1  img096
Performance and mileage log for all-aluminium wiring tubes fitted to a Phantom II engine.4th Sep 1930Box 168 \ 1  img097
Instructions detailing parts required for an experiment on a 20/25HP Chassis concerning aluminium ignition tubes.9th Jul 1930Box 168 \ 1  img098
Fitting aluminium ignition tubes to a 20/25 HP chassis for a 10,000-mile test with a view to standardisation.3rd Sep 1930Box 168 \ 1  img099
Test report on Maconite H.T. ignition cable.2nd Dec 1930Box 168 \ 1  img100
Extract from a monthly customer complaint report about Magneto H.T. wires for Phantom I and II models.16th Jan 1931Box 168 \ 1  img101
Proposed modification to the H.T. magneto wiring due to overheating.11th Dec 1930Box 168 \ 1  img102
Extract from a 6,000-mile report on chassis 18-CIV, detailing improvements to the ignition wires.18th Dec 1930Box 168 \ 1  img103
Suggestion to replace a brown bakelite elbow with a black enamelled aluminium casting for improved appearance and cost.29th Jan 1931Box 168 \ 1  img104
Extract from a 10,000-mile report concerning ignition wires and an aluminium tube.30th Jan 1931Box 168 \ 1  img105
Proposals to reduce the cost of ignition wiring tubes for the P. 2.25th Apr 1931Box 168 \ 1  img106
Failure of an H.T. wire on a Phantom II, confirming its insulation is standard and a better support is being investigated.8th Jun 1931Box 168 \ 1  img107
Ignition failure on an experimental Phantom II chassis due to the H.T. wire from the coil to distributor breaking down.9th Jul 1931Box 168 \ 1  img108
Powdery substance appearing on the high tension ignition wires of experimental engines, likely caused by heat radiation.19th Dec 1931Box 168 \ 1  img109
Powdery substance observed on ignition wires, identifying it as harmless resin from varnish.21th Dec 1931Box 168 \ 1  img110
On testing an H.T. wire, concluding the issue was moisture at the magneto end.21th Jan 1932Box 168 \ 1  img111
Test report on St Helens Cable & Rubber Co's high-tension and wiring cables, detailing high voltage breakdown and chemical effects.23th May 1932Box 168 \ 1  img112
Test report on the effects of oil immersion and heat on various electrical cables.23th May 1932Box 168 \ 1  img113
Test results for high voltage breakdown, high tension cable, and inflammability.23th May 1932Box 168 \ 1  img114
The submission of High Tension Ignition Flexible and wiring Cable samples for testing.6th May 1932Box 168 \ 1  img115
Confirming a previous communication and forwarding new samples of flexible cables for testing.19th May 1932Box 168 \ 1  img116
On test results for St. Helens Cable and Rubber Co's cellulose varnished fabric covered wires.28th May 1932Box 168 \ 1  img117
Response to a provisional specification on high tension electric ignition cables, questioning the need for pure rubber.23th Aug 1932Box 168 \ 1  img118
Attached blueprint Lec.3180 for the proposed ignition wiring scheme for the Peregrine.6th Sep 1932Box 168 \ 1  img119
Ripogloss Cable and the discontinuation of polished laquerred cables on experimental chassis.20th Jan 1933Box 168 \ 1  img120
Specification for P.B. Braided H.T. cable for tank engines.1st Apr 1933Box 168 \ 1  img121
The Bentley 3.5 Litre wiring diagram, requesting a check on the regulator's connection.17th May 1933Box 168 \ 1  img122
Comments and recommendations on the Bensport wiring diagram for model DB245.19th May 1933Box 168 \ 1  img123
Ignition coil windings and a proposed change to accessory fuse arrangements following a near-fire incident.19th May 1933Box 168 \ 1  img124
Considerations for 'Bensport' wiring diagrams, including dynamo, petrol gauge, and fuse issues.23th May 1933Box 168 \ 1  img125
The testing of a dynamo field fuse for a Bensport wiring diagram.29th May 1933Box 168 \ 1  img126
Confirming a test on a dynamo's protection circuit and fuse for 'Bensport' wiring.31th May 1933Box 168 \ 1  img127
Viability of using a smaller 4.5-ampere fuse for the Bentley wiring diagram's vibrator control dynamo.31th May 1933Box 168 \ 1  img128
Wiring alterations for the first experimental Bentley chassis, known as Bensport wiring.12th Jun 1933Box 168 \ 1  img129


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