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
Exhaust roar issue, proposed solutions, and a decision not to purchase a Bentley car.11th Jul 1929Box 14 \ 6  Scan093
Query regarding the incorporation of modifications for Fabric Couplings and an S.S. Exhaust System into the first batch of S.S. chassis.15th Jul 1929Box 14 \ 6  Scan094
Laboratory report on pitting issues in S.S. exhaust valves and seatings due to the properties of Aluminium Bronze.16th Jul 1929Box 14 \ 6  Scan095
Test results for the S.S. chassis, focusing on axle performance, steering, and identified noise issues.16th Jul 1929Box 14 \ 6  Scan096
Exhaust manifold modifications, exhaust notes, and chassis testing results for various models.17th Jul 1929Box 14 \ 6  Scan097
Issues with exhaust valve seatings on S.S. cars, suggesting a change in material hardness.17th Jul 1929Box 14 \ 6  Scan098
Laboratory note discussing variations in the Brinell hardness of S.S. exhaust valve seatings.19th Jul 1929Box 14 \ 6  Scan099
Modifications to an SS exhaust system, including a new silencer design and reduced pipe diameter.26th Jul 1929Box 14 \ 6  Scan100
Differences for production cars regarding rear spring oiling, servo lining, thermostat, and exhaust fittings.26th Jul 1929Box 14 \ 6  Scan101
List of required modifications for S.S. cars concerning steering and damper components.30th Jul 1929Box 14 \ 6  Scan102
Mr. Royce's decisions on new materials for exhaust valves and valve guides for all engines.30th Jul 1929Box 14 \ 6  Scan103
Issue of spitting in the exhaust on the S.S. chassis.8th Aug 1929Box 14 \ 6  Scan104
Extract discussing a fault with the exhaust joint on an S.S. Chassis.1st Aug 1929Box 14 \ 6  Scan105
Oil leak issue with the change gear bracket breather hole and suggesting design modifications.14th Aug 1929Box 14 \ 6  Scan106
Modifications to an SS exhaust system, including a new scheme for a ribbed cast aluminium front expansion box.15th Aug 1929Box 14 \ 6  Scan107
Improvements to exhaust and inlet valves for all aero and car engines.19th Aug 1929Box 14 \ 6  Scan108
Modifications to an SS exhaust system box and its spring anchorage.20th Sep 1929Box 14 \ 6  Scan109
Various schemes for induction pipe and carburetter heating for the Phantom II model.1st Oct 1929Box 14 \ 6  Scan110
Programme of S.S. hot spot experiments and modifications for a 20 HP engine.16th Oct 1929Box 14 \ 6  Scan111
List of action items for modifying and testing engine components, including manifolds and compression ratios.16th Oct 1929Box 14 \ 6  Scan112
Calibration curve graph for an exhaust hot spot thermocouple.23th Oct 1929Box 14 \ 6  Scan113
Experiments with exhaust heating for the Phantom II engine's hot spot.23th Oct 1929Box 14 \ 6  Scan114
Page two of a test report discussing engine temperatures and the design of the exhaust and intake manifold.12th Nov 1929Box 14 \ 6  Scan115
Road test results of a cast aluminium silencer fitted to test car 20-EX.12th Nov 1929Box 14 \ 6  Scan116
Exhaust system modifications to reduce spitting noises and booming, including a cast aluminium part and a different down pipe.12th Nov 1929Box 14 \ 6  Scan117
Troubleshooting noise issues with the exhaust heated hot spot on the Phantom II.16th Nov 1929Box 14 \ 6  Scan118
Standardisation of chassis parts concerning Firth's Crown steel car engine exhaust valves.23th Aug 1929Box 14 \ 6  Scan119
Design to silence the noise in the Phantom II exhaust heated induction pipe.27th Nov 1929Box 14 \ 6  Scan120
Modification to the Phantom II exhaust silencer to prevent 'spitting'.28th Nov 1929Box 14 \ 6  Scan121
Design schemes for the Phantom II's exhaust-heated throttle.29th Nov 1929Box 14 \ 6  Scan122
Query regarding the supply of exhaust heated throttles for three Phantom II chassis exported to America.5th Dec 1929Box 14 \ 6  Scan123
Recommended exhaust heated throttle scheme for the Phantom II 18-EX car and the plan for its approval.6th Dec 1929Box 14 \ 6  Scan124
Brief acknowledgement memo regarding an exhaust heated throttle.7th Dec 1929Box 14 \ 6  Scan125
Querying the approval for fitting an exhaust-heated carburetter, particularly for cars destined for America.1st Dec 1929Box 14 \ 6  Scan126
Standardisation sheet for an exhaust heated bend for the Phantom II model, intended for cars going to the U.S.A.16th Dec 1929Box 14 \ 6  Scan127
Carburetter standardisation, Phantom II frame and carburetter development, and the 20 HP model.17th Dec 1929Box 14 \ 6  Scan128
Meeting notes on design modifications for the 20 HP and aero engines, including gearing and materials.2nd Jan 1930Box 14 \ 6  Scan129
Proposal to trial hard-drawn brass sheet for Phantom Chassis silencer laggings and clips as a cost-saving measure.2nd Jan 1930Box 14 \ 6  Scan130
Analysis comparing the standard silencer system with a new cast aluminium expansion box system for the Phantom II model.13th Jan 1930Box 14 \ 6  Scan131
Exhaust system tests, detailing power loss and component melting under test conditions.24th Nov 1930Box 14 \ 6  Scan132
Graph plotting Brake Horse Power against engine RPM for various exhaust system configurations on an SS-15 engine.9th Jan 1930Box 14 \ 6  Scan133
Blank page with a 'Print Room' stamp.13th Jan 1930Box 14 \ 6  Scan134
Graph showing power loss to a standard exhaust system for engine SS-15 under various configurations.9th Jan 1930Box 14 \ 6  Scan135
Blank document page marked with a 'Print Room' reception stamp.13th Jan 1930Box 14 \ 6  Scan136
Graph comparing the power output from an engine with different exhaust manifold pipe systems.10th Jan 1930Box 14 \ 6  Scan137
Page marked with a receiving stamp from the print room.13th Jan 1930Box 14 \ 6  Scan138
Blueprint diagram illustrating the failure of a cut-out ring, showing areas of melting and cracking.11th Mar 1930Box 14 \ 6  Scan139
Stamped document from the Print Room in Derby.14th Jan 1930Box 14 \ 6  Scan140
Modification to the Phantom II exhaust system's aluminium silencer to avoid drumming.28th Jan 1930Box 14 \ 6  Scan141
Phantom II exhaust system and a scheme for an aluminium front expansion box.28th Jan 1930Box 14 \ 6  Scan142
Effectiveness of a malleable iron feed pipe and the design of a silencer for a Phantom II induction system.1st Feb 1930Box 14 \ 6  Scan143
Vibrations and booms on the Phantom II model, caused by a leaking exhaust cutout valve, suggesting improvements.10th Feb 1930Box 14 \ 6  Scan144
Problems and proposed solutions for exhaust manifolds on various car models.26th Feb 1931Box 14 \ 6  Scan145
Manifold improvements for the P. 2 model, including material changes and the addition of cooling ribs.19th Mar 1930Box 14 \ 6  Scan146
Recommendation to delete drain holes in silencers as they are a source of exhaust noise.19th Mar 1930Box 14 \ 6  Scan147
Directive to revert to using S.L.V. steel for exhaust valves on 20 HP and 40/50 HP chassis.4th Apr 1930Box 14 \ 6  Scan148
The reversion to S.L.V. Specification No. 238.A for exhaust valves on 20/25 HP and 40/50 HP chassis.7th Apr 1930Box 14 \ 6  Scan149
The switch to S.L.V. steel for exhaust valves and the resulting scrap costs.8th Apr 1930Box 14 \ 6  Scan150
Investigation report on a seized exhaust cut out and a broken battery box flange on car 23-EX.24th Apr 1930Box 14 \ 6  Scan151
Issues with body mounting, subframes, and potential improvements.21th May 1930Box 14 \ 6  Scan152
Investigation into body and chassis noises like booming and rumble, with proposals for testing and modifications.21th May 1930Box 14 \ 6  Scan153
Bending of a triangular flat plate on the Phantom II exhaust system.28th May 1930Box 14 \ 6  Scan154
Slipping nickel silver lagging on the exhaust system of chassis 23-EX.2nd Jun 1930Box 14 \ 6  Scan155
Complaints of damage to spring gaiters from the Phantom II silencer outlet, with a proposed solution and a handwritten update.4th Jun 1930Box 14 \ 6  Scan156
The failure of a triangular stay for the Phantom II front exhaust box and proposed modifications.11th Aug 1930Box 14 \ 6  Scan157
With a sketch requesting an experimental, strengthened bracket for the front silencer.28th May 1930Box 14 \ 6  Scan158
Inquiring if it is in order to bend the Phantom II silencer snout to clear the gaiters.16th Jun 1930Box 14 \ 6  Scan159
Deterioration of ignition wires and the proposal to fit a shield.17th Jun 1930Box 14 \ 6  Scan160
Test report on two strengthened anchor plates for Phantom II exhaust fittings.20th Jun 1930Box 14 \ 6  Scan161
Extract from a report on tests of completed cars, regarding extending an exhaust pipe.26th Jun 1930Box 14 \ 6  Scan162
Alterations to the Phantom II silencer snout.4th Jul 1930Box 14 \ 6  Scan163
The failure of an aluminium front expansion box on an exhaust system and a request for a steel replacement.11th Jul 1930Box 14 \ 6  Scan164
Blueprint diagram illustrating the failure of a front expansion box.11th Jul 1930Box 14 \ 6  Scan165
Query regarding a collapsed front expansion chamber on a 24-EX Phantom II during a 10,000-mile test.14th Jul 1930Box 14 \ 6  Scan166
The failure of a modified aluminium exhaust system on a Phantom II car due to heat.14th Jul 1930Box 14 \ 6  Scan167
The non-standardisation of the 24-EX exhaust system and the unsuitability of aluminium.15th Jul 1930Box 14 \ 6  Scan168
Extract concerning the extension of the P.2. exhaust swan neck in relation to designing a rear apron.15th Jul 1930Box 14 \ 6  Scan169
Suggestion to increase the number of bolts on the P.2 exhaust system's front expansion box flange from 4 to 8.15th Jul 1930Box 14 \ 6  Scan170
The preferable steel and shape for exhaust valves in car and aero engines.13th Aug 1930Box 14 \ 6  Scan171
Failure of aluminium exhaust boxes and suggesting cast iron and other alloys as alternative materials.1st Aug 1930Box 14 \ 6  Scan172
Decision to manufacture ribbed exhaust boxes in cast iron.22th Aug 1930Box 14 \ 6  Scan173
From 'Sg.' to 'Hs.' requesting to be kept informed about the results regarding exhaust valves for car and aero engines.2nd Sep 1930Box 14 \ 6  Scan174
Responding to a proposal to alter exhaust valves, citing past negative experiences with Ostenetic Steel.3rd Sep 1930Box 14 \ 6  Scan175
Modification to the design of the Phantom II silencers.15th Oct 1930Box 14 \ 6  Scan176
Modifications to the petrol tank, single line gauge fitting, filler, wheel carrier, and exhaust fishtail.17th Nov 1930Box 14 \ 6  Scan177
Investigation into the cause and potential cure for 'spitting in the silencer'.20th Nov 1930Box 14 \ 6  Scan178
The effects of fitting a smaller low-speed choke tube to improve carburation and reduce engine spitting.20th Nov 1921Box 14 \ 6  Scan179
Engine tests performed on car 22-EX to investigate a 'spitting' issue.20th Nov 1939Box 14 \ 6  Scan180
The test results of a Phantom II exhaust system with a long sliding joint.1st Dec 1930Box 14 \ 6  Scan181
Revised bracket for the exhaust swanneck pipe and associated testing.1st Dec 1930Box 14 \ 6  Scan182
Changes and new parts for the Phantom II exhaust fittings.10th Dec 1930Box 14 \ 6  Scan183
New drawings and parts for an extended rear exhaust pipe experiment on a 40/50HP chassis.11th Dec 1930Box 14 \ 6  Scan184
The parts for a heat shield to be fitted to the exhaust manifold on a 40/50HP chassis.24th Dec 1930Box 14 \ 6  Scan185
Instruction to modify the exhaust system on all L.H. Phantom II chassis.7th Jan 1931Box 14 \ 6  Scan186
Standardisation report on altering the Phantom II exhaust system to the 20/25 scheme.11th Dec 1930Box 14 \ 6  Scan187
Implementation and costs associated with a standardized chassis part.2nd Feb 1931Box 14 \ 6  Scan188
40/50 silencers, detailing power loss, weight, and silence level.2nd Feb 1931Box 14 \ 6  Scan189
Failure of an exhaust pipe due to corrosion and proposing further investigation on Phantom II chassis.3rd Feb 1931Box 14 \ 6  Scan190
Silencer pipe on a Phantom II failing due to intercrystalline corrosion, with a request to check other cars.5th Feb 1931Box 14 \ 6  Scan191
Use of cooling ribs on exhaust manifolds for Phantom I and 20/25 models.4th Mar 1931Box 14 \ 6  Scan192


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