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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Report page detailing tests on a carburetor's jet needle, choke, and diffuser performance.21th Oct 1929Box 13 \ 3  03-page116
Graph of power curves comparing different carburettor configurations on a Standard Phantom engine.21th Oct 1929Box 13 \ 3  03-page117
Graph plotting Brake Horse Power (BHP) against RPM for two expanding choke carburettor configurations.23th Oct 1929Box 13 \ 3  03-page118
Experiments on an exhaust-heated hot spot for the Phantom II engine.23th Oct 1929Box 13 \ 3  03-page119
Test report comparing exhaust temperatures with different silencer arrangements and suggesting design improvements.22th Oct 1929Box 13 \ 3  03-page120
Power curve graph for Engine No. SS.15, comparing an exhaust-heated hot-spot system to a standard water-heated one.22th Oct 1929Box 13 \ 3  03-page121
Blueprint drawing of an Exhaust Hot Spot Silencer.17th Oct 1929Box 13 \ 3  03-page122
The standardisation of the Phantom II exhaust heated carburetter.25th Oct 1929Box 13 \ 3  03-page123
Experimental results for an exhaust-heated carburettor on the Phantom II.25th Oct 1929Box 13 \ 3  03-page124
Development and urgency of an exhaust heated carburetter for the Phantom II, specifically for the American market.28th Oct 1929Box 13 \ 3  03-page125
Design options for the Phantom II exhaust heated throttle and silencer system.28th Oct 1929Box 13 \ 3  03-page126
Standardisation of exhaust-heated carburettors for the Phantom II chassis, listing affected parts.31th Oct 1929Box 13 \ 3  03-page127
Supply of new exhaust heated carburetter parts for a Phantom II to the American company.1st Nov 1929Box 13 \ 3  03-page128
The fitting of an exhaust heated carburetter for a Phantom II.5th Nov 1929Box 13 \ 3  03-page129
Power output tests of an expanding choke carburetter on a Phantom II engine.1st Nov 1929Box 13 \ 3  03-page130
Progress report on resolving engine metering problems by testing combinations of needle taper and diffuser air piston springs.1st Nov 1929Box 13 \ 3  03-page131
Graph comparing the power output of a Phantom III engine with an expanding choke carburettor versus a standard Phantom carburettor.4th Nov 1929Box 13 \ 3  03-page132
Analysis of obstructions in the petrol supply line to the carburettor and their effect on delivery flow rates.7th Nov 1929Box 13 \ 3  03-page133
Analysis of fuel flow obstructions and delivery rates under various supply conditions.7th Nov 1929Box 13 \ 3  03-page134
Table of fluid delivery results under various component configurations.7th Nov 1929Box 13 \ 3  03-page135
Needle valve seat and fuel flow tests with recommendations for improvement.7th Nov 1929Box 13 \ 3  03-page136
Comparison table of flow rates for a standard filter versus a modified filter.1st Nov 1929Box 13 \ 3  03-page137
Drawing of a nipple used for petrol flow tests.6th Nov 1929Box 13 \ 3  03-page138
Blueprint showing the dimensions of a larger banjo used on petrol flow tests, supplied with Zenith petrol filters.7th Nov 1929Box 13 \ 3  03-page139
Cross-section drawing showing a modification to part E76531 for petrol flow tests.7th Nov 1929Box 13 \ 3  03-page140
Blueprint detailing a valve assembly and various points at which petrol flow deliveries were measured.7th Nov 1929Box 13 \ 3  03-page141
Testing and development of an exhaust heating device for Phantom II carburettors, for chassis ordered by America.11th Nov 1929Box 13 \ 3  03-page142
Noise issue with the exhaust heating system for Phantom II carburettors.2nd Nov 1929Box 13 \ 3  03-page143
Noise issues with the exhaust heated hot spot on the Phantom II.16th Nov 1929Box 13 \ 3  03-page144
Customer suggestion to connect the red warning lamp to the starter carburetter on Phantom cars.8th Nov 1929Box 13 \ 3  03-page145
Proposal to add a red warning lamp for the starting carburetter to alert customers when it is left on.18th Nov 1929Box 13 \ 3  03-page146
Design to silence the noise in the exhaust heated induction pipe for the Phantom II.27th Nov 1929Box 13 \ 3  03-page147
Design schemes for an exhaust-heated throttle on the Phantom II model.29th Nov 1929Box 13 \ 3  03-page148
Alternative exhaust-heated carburettor uptake for the Phantom II, designed to dampen exhaust noise.1st Dec 1929Box 13 \ 3  03-page149
Proposal for improvements to carburetters, outlining a system combining fixed and expanding type features.12th Mar 1929Box 13 \ 3  03-page150
Technical description of carburettor design features and principles of operation.12th Mar 1929Box 13 \ 3  03-page151
Page discussing an air valve, a restrictor needle, and referencing an attached carburetter drawing.4th Dec 1929Box 13 \ 3  03-page152
New expanding carburetter design based on a recent patent, aimed at increasing MEP at higher speeds.4th Dec 1929Box 13 \ 3  03-page153
Modifications to the Phantom II Air Silencer Carburetter to reduce power loss.7th Dec 1929Box 13 \ 3  03-page154
List of requested alterations for various parts, with a supporting diagram for one modification.16th Dec 1929Box 13 \ 3  03-page155
From Sg. to Hs. regarding the approval and fitting of an exhaust-heated carburettor.16th Dec 1929Box 13 \ 3  03-page156
Issuing a standardisation sheet for an exhaust heated bend for the Phantom II model.16th Dec 1929Box 13 \ 3  03-page157
Carburetter standardisation, Phantom II frame modifications, and the 20 HP model.17th Dec 1929Box 13 \ 3  03-page158
Design decisions for rubber engine mountings, aero engine R, reduction gear noise, and material treatments.18th Dec 1929Box 13 \ 3  03-page159
Requesting views on an attached note regarding an exhaust heated carburetter.18th Dec 1929Box 13 \ 3  03-page160
Requesting to fit an exhaust heated carburetter to a customer's Phantom II chassis destined for the U.S.A.17th Dec 1929Box 13 \ 3  03-page161
Fitting of an exhaust heated carburetter to Phantom II cars destined for use in the U.S.A.19th Dec 1929Box 13 \ 3  03-page162
Report discussing piston seizure and scoring issues attributed to misuse of the starter carburetter, proposing a modification.19th Dec 1929Box 13 \ 3  03-page163
Suggestion for a simplified, non-adjustable lubrication system using an 'upper cylinder' lubricant.19th Dec 1929Box 13 \ 3  03-page164
Tests carried out on an Air Silencer Carburetter S.S. detailing power loss issues.20th Dec 1929Box 13 \ 3  03-page165
Analysis of power loss caused by cowling and air-silencer modifications on a carburetter.20th Dec 1929Box 13 \ 3  03-page166
Proposed modifications to a silencer and carburettor to improve airflow and reduce noise.6th Dec 1929Box 13 \ 3  03-page167
Graph comparing Brake Horse Power vs RPM for an engine with different air silencer carburettor configurations.6th Dec 1929Box 13 \ 3  03-page168
Graph plotting Brake Horse Power against RPM for Air Silencer Carburettor development on Engine No. S-7.9th Dec 1929Box 13 \ 3  03-page169
Performance graph analysing silencer losses during air silencer carburettor development on Engine N° 55-7.9th Dec 1929Box 13 \ 3  03-page170
Performance graph analyzing engine brake horsepower versus RPM for various air silencer carburetor configurations and losses.9th Dec 1929Box 13 \ 3  03-page171
Design, materials, and silencer for the Phantom II exhaust-heated induction pipe.21th Dec 1929Box 13 \ 3  03-page172
Required modifications for the Air Silencer Carburetter, LeC.2734.28th Dec 1929Box 13 \ 3  03-page173
Drawing for a proposed modification to the Phantom II Air Silencer.2nd Jan 1930Box 13 \ 3  03-page174
The exhaust heated throttle fitted to cars sent to America.3rd Jan 1930Box 13 \ 3  03-page175
The supply and fitting of exhaust-heated carburetters for various Phantom II chassis.3rd Jan 1930Box 13 \ 3  03-page176
Modification instructions for the Phantom 11 carburetter air inlet and silencer.4th Jan 1930Box 13 \ 3  03-page177
Modification of a suction piston for a high-speed choke tube.4th Jan 1930Box 13 \ 3  03-page178
The results of fitting a Solex Duplex carburettor to a Phantom II engine.7th Jan 1930Box 13 \ 3  03-page179
Performance comparison of Standard, R.R.C.H., and Solex twin carburettors on a Phantom II engine.7th Jan 1930Box 13 \ 3  03-page180
The performance of a Solex induction system and carburetter on a Phantom I car (12-EX).7th Jan 1930Box 13 \ 3  03-page181
Graph plotting Brake Horse Power against RPM for Solex twin carburettor tests on a Phantom II engine.10th Jan 1930Box 13 \ 3  03-page182
Query about the suggestion to add a red warning lamp for the starter carburetter on 'Phantom' cars.10th Jan 1930Box 13 \ 3  03-page183
Drawing for an expanding carburetter with a fixed throat for the Phantom II.19th Jan 1930Box 13 \ 3  03-page184
Modification to force lubricating oil into cylinders when using the starting carburetter.28th Jan 1930Box 13 \ 3  03-page185
The performance improvements of the Phantom II engine when fitted with a twin Solex carburettor, including feedback from Sir Henry Segrave.21th Jan 1930Box 13 \ 3  03-page186
Improving engine performance and acceleration by using twin carburetters, with references to competitors and specific engine models.22th Jan 1930Box 13 \ 3  03-page187
Dynamometer and road test report comparing a Solex twin choke carburetter against the standard on a Phantom II.22th Jan 1930Box 13 \ 3  03-page188
The performance of a simple carburettor and potential improvements.22th Jan 1930Box 13 \ 3  03-page189
Graph comparing power at road wheels for a Solex Twin Choke Carburetter versus an RR Carburetter on a Phantom II.22th Jan 1930Box 13 \ 3  03-page190
Resolving petrol feed issues on the Phantom II model during dynamometer testing.27th Jan 1930Box 13 \ 3  03-page191
Modifications to the Phantom II air inlet silencer to reduce power loss.28th Jan 1930Box 13 \ 3  03-page192
The Phantom II exhaust heated throttle, its testing, and a proposal for an extra oil supply scheme.28th Jan 1930Box 13 \ 3  03-page193
Test report and recommendation for the Phantom II exhaust heated jacket induction system silencer.30th Jan 1930Box 13 \ 3  03-page194
Phantom II exhaust heated jacket induction system, the malleable iron feed pipe, and a silencer design.1st Feb 1930Box 13 \ 3  03-page195
Unsatisfactory noise issue with exhaust heated throttles on production chassis under light load.14th Feb 1930Box 13 \ 3  03-page196
Responding to a complaint about a noisy exhaust heated throttle system on the 22-EX chassis.15th Feb 1930Box 13 \ 3  03-page197
Proposing finer manufacturing limits for the Phantom II exhaust heated induction bend.18th Feb 1930Box 13 \ 3  03-page198
The eighth report of the design committee discussing developments for the Phantom ll, 20 HP, Condor, and Schneider Trophy engines.25th Feb 1930Box 13 \ 3  03-page199
Engine modifications and development requirements for the 1931 Schneider Trophy race.25th Feb 1930Box 13 \ 3  03-page200
Summary of tests with twin Solex carburetters on the Phantom II vehicle, comparing performance improvements.27th Feb 1930Box 13 \ 3  03-page201
Extract from quarterly complaints for the 20 HP & Phantom models, detailing a suggestion for the starter carburetter.27th Feb 1930Box 13 \ 3  03-page202
Standardisation of an exhaust heated induction pipe bend to improve carburation on cars for the U.S.A.16th Dec 1929Box 13 \ 3  03-page203
Standardisation document for an exhaust heated induction pipe bend.12th Dec 1918Box 13 \ 3  03-page204
Proposal for the standardisation of the Phantom II exhaust heated induction pipe bend system.13th Dec 1929Box 13 \ 3  03-page205
Proposing a design for an adjustable mechanism for the radiator shutter and starting carburetter controls.11th Apr 1930Box 13 \ 3  03-page206
Development of twin carburetters for 6-cylinder engines, potentially for the Phantom II.14th May 1930Box 13 \ 3  03-page207
Power loss due to the carburettor air silencer and proposed modifications.7th May 1930Box 13 \ 3  03-page208
Preliminary tests of a modified air-silencer carburetter (LRC.2786) for F.II engines.7th May 1930Box 13 \ 3  03-page209
Analysis of power loss from air-port cowling and silencer tubes with proposed modifications to improve performance.7th May 1930Box 13 \ 3  03-page210
Blueprint graph comparing brake horsepower against engine RPM for a Phantom II engine with and without an air silencer carburettor.6th May 1930Box 13 \ 3  03-page211
Graph analysing the power loss of an air silencer carburettor by plotting brake horse power against engine RPM.6th May 1930Box 13 \ 3  03-page212
Preliminary test report and modification request for the Phantom II starting carburetter nozzle and needle.14th May 1930Box 13 \ 3  03-page213
Diagram of a needle valve assembly for a starting carburetter.31th May 1930Box 13 \ 3  03-page214
Oil draining and power loss issues with a carburetter silencer, proposing design modifications.31th May 1930Box 13 \ 3  03-page215


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