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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Photograph and the design of a vertical silencer for a semi-expanding carburetter.19th Dec 1932Box 13 \ 4  04-page081
Photograph of an installed inline-six engine, showing the carburettor, air intake, and distributor.23th Dec 1932Box 13 \ 4  04-page082
Excessive suction noise from a new type of carburetter for the Phantom II 'O' Series.23th Dec 1932Box 13 \ 4  04-page083
Increased suction noise of a new carburetter for the Phantom II 'O' Series.28th Dec 1932Box 13 \ 4  04-page084
Requesting an experiment on a semi-expanding carburetter to resolve a weakening off issue.31th Dec 1932Box 13 \ 4  04-page085
Additional feature for Semi-Expanding Carburetters on J.2 and Phantom II models.3rd Jan 1933Box 13 \ 4  04-page086
Modifications to resolve hesitation issues on Phantom II carburetters.6th Jan 1933Box 13 \ 4  04-page087
Test results for a Semi-Expanding Carburetter P.II, detailing efforts to prevent air leaks and balance float chamber depression.9th Jan 1933Box 13 \ 4  04-page088
Recommendation for assembling a control spindle to prevent leaks in the float chamber.9th Jan 1933Box 13 \ 4  04-page089
Request to produce a further set of parts for the large air valve of a 40/50 carburetter.12th Jan 1933Box 13 \ 4  04-page090
The re-issue of a document on semi-expanding carburettors and refinements to increase jet spring pressure.14th Jan 1933Box 13 \ 4  04-page091
Redesigned throttle edge adjustment for semi-expanding carburetters on Phantom II and J.2 models.16th Jan 1933Box 13 \ 4  04-page092
Design of a resonance air silencer for the Phantom II Semi-Expanding Carburetter.21th Jan 1933Box 13 \ 4  04-page093
Requesting two larger air valve Phantom II carburetters with modifications.25th Jan 1933Box 13 \ 4  04-page094
Tester's report on rectifying a 'luffing up' issue with a Phantom II semi-expanding carburettor.31th Jan 1933Box 13 \ 4  04-page095
And recommending modifications to a standard carburetter.31th Jan 1933Box 13 \ 4  04-page096
Blueprint showing a modification to a diffuser component.1st Feb 1933Box 13 \ 4  04-page097
Starting carburetter controls and extra cylinder lubrication for the Phantom II.2nd Feb 1933Box 13 \ 4  04-page098
Test report on the Large Phantom II Semi Expanding Carburetter, detailing modifications and performance.6th Feb 1933Box 13 \ 4  04-page099
Resolving excessive fuel consumption by modifying the carburetter's stand pipe and float chamber.6th Feb 1933Box 13 \ 4  04-page100
Carburetter modifications, alterations, and subsequent performance during slow running and road tests.6th Feb 1933Box 13 \ 4  04-page101
Resolving a 'luffing up' issue in a carburetter caused by a low diffuser level and proposed modifications.6th Feb 1933Box 13 \ 4  04-page102
Blueprint for a PII carburettor needle, showing taper diameters.7th Feb 1933Box 13 \ 4  04-page103
Blueprint detailing a modification to a float chamber vent position.7th Feb 1933Box 13 \ 4  04-page104
Performance graph showing Power Output, BMEP, and RPM for a Phantom II engine with an open exhaust.7th Feb 1935Box 13 \ 4  04-page105
Standardisation of a Semi-Expanding Carburetter to increase engine efficiency.6th Sep 1932Box 13 \ 4  04-page106
Standardisation form for a new chassis part to be fitted to the 'J' Series Continental Chassis.19th Nov 1932Box 13 \ 4  04-page107
Proposed modifications to the Large Phantom II Semi-Expanding Carburetter.16th Feb 1933Box 13 \ 4  04-page108
Test report on a Phantom II 'O' Series Continental Model with a semi-expanding carburettor.20th Feb 1933Box 13 \ 4  04-page109
Inquiring about the experimental fitting of carburettor air silencers to 20/25 and Phantom II chassis.24th Feb 1933Box 13 \ 4  04-page110
Query regarding the experimental fitting of carburetter air silencers to a 20/25 and a Phantom II chassis.24th Feb 1933Box 13 \ 4  04-page111
Fitting carburetter air silencers to specific chassis.27th Feb 1933Box 13 \ 4  04-page112
Experiments to locate a restriction point in Phantom II large air valve carburettors.28th Feb 1933Box 13 \ 4  04-page113
The fitting of carburetter air silencers.27th Feb 1933Box 13 \ 4  04-page114
Test report on a semi-expanding carburetter, detailing modifications to the throttle bore and their effect on induction pipe depression.28th Feb 1933Box 13 \ 4  04-page115
Test data sheet showing induction pipe depression and necessary piston lift under various engine configurations at 3000 rpm.28th Feb 1933Box 13 \ 4  04-page116
The performance gain from a semi-expanding carburetter on the Phantom II.4th May 1933Box 13 \ 4  04-page117
Performance graph comparing the power output of a Phantom II engine with a standard versus a larger expanding carburettor.3rd Mar 1933Box 13 \ 4  04-page118
Performance of a semi-expanding carburetter silencer during London Trials on car 20-MY.6th Mar 1933Box 13 \ 4  04-page119
Fitting of an air silencer to the 40/50 semi-expanding carburetter.7th Mar 1933Box 13 \ 4  04-page120
List of modifications for the large Phantom II carburetter.9th Mar 1933Box 13 \ 4  04-page121
Request to manufacture six throttle spindle bushes in BZ/PC for a Phantom II carburetter due to issues with the original Duralumin material.14th Mar 1933Box 13 \ 4  04-page122
Urgent inquiry about the development and fitting history of a new air silencer for car models 19-EX and 58-GN.14th Mar 1933Box 13 \ 4  04-page123
Tests on a semi-expanding carburettor and a resonance-type air silencer for cars 19-EX and 58-GN.15th Mar 1933Box 13 \ 4  04-page124
Throttle sticking issues and potential solutions for the Phantom II Semi Expanding Carburetter.15th Mar 1933Box 13 \ 4  04-page125
Confusion over the introduction schedule of new air silencers for Phantom II cars.15th Mar 1933Box 13 \ 4  04-page126
Mistake and revised plan for introducing an air silencer to the O2 series chassis.15th Mar 1933Box 13 \ 4  04-page127
The delays in introducing an air silencer for the Phantom II Cars.17th Mar 1933Box 13 \ 4  04-page128
Cutaway diagram illustrating depression tests on a Semi-Expanding Carburettor Phase II.20th Mar 1933Box 13 \ 4  04-page129
Production of new silencers and their impact on existing Phantom 0.2 models and induction pipes.16th Mar 1933Box 13 \ 4  04-page130
Modified spring and attachment for the Phantom II throttle valve.17th Mar 1933Box 13 \ 4  04-page131
Carburetter silencer noise and steering concerns on the Phantom II Continental cars.18th Mar 1933Box 13 \ 4  04-page132
Proposing modifications to the semi-expanding carburetter before production.21th Mar 1933Box 13 \ 4  04-page133
Test report on modifications to a Large Phantom II expanding carburetter to reduce induction pipe depression.20th Mar 1933Box 13 \ 4  04-page134
Carburetter modifications, airflow, and induction pipe depression tests.20th Mar 1933Box 13 \ 4  04-page135
Blueprint for the proposed layout of an expanding carburettor's intake flange and air ports.20th Jan 1938Box 13 \ 4  04-page136
Two new designs of copper gauze air cleaners for the 20-HP and Phantom II models.28th Mar 1933Box 13 \ 4  04-page137
Reasons for a modification to the throttle spring for the Phantom II.29th Mar 1933Box 13 \ 4  04-page138
Explaining the reasoning for a modified throttle spring design for the Phantom II.29th Mar 1933Box 13 \ 4  04-page139
Series of tests to resolve excessive oil consumption on 25 HP & Phantom II cars after fitting new air silencers.30th Mar 1933Box 13 \ 4  04-page140
Instructions to address oil consumption on Phantom II cars by fitting a new pipe and resolving an oil breather issue.30th Mar 1933Box 13 \ 4  04-page141
Modification to the breather connection on a Phantom II crankcase.30th Mar 1933Box 13 \ 4  04-page142
Test report on depressions in the latest type Phantom Air Silencer.11th Apr 1933Box 13 \ 4  04-page143
Requesting updates to the Peregrine and J.III carburetter drawings to incorporate improvements and fix an air lock fault.10th Apr 1933Box 13 \ 4  04-page144
Instruction to include modification (V.1541) into the existing carburetter body (E.83047) for the Phantom II expanding carburetter.10th Apr 1933Box 13 \ 4  04-page145
Sketch showing the position for a 1' spring lever on the Phantom II throttle.26th Apr 1933Box 13 \ 4  04-page146
Analysis of throttle spring direction and its effect on bearing loads and throttle spindle wear.29th Apr 1933Box 13 \ 4  04-page147
Carburetter disposition and a recommendation to increase the spring load for production part Lec.3412.29th Apr 1933Box 13 \ 4  04-page148
Tests conducted on the Phantom II throttle spring.29th Apr 1933Box 13 \ 4  04-page149
Test results and calculations for a throttle mechanism, comparing torque and load under different schemes.29th Apr 1933Box 13 \ 4  04-page150
Calculations for bearing loads and spring torque on a mechanical component under different force conditions.2nd May 1933Box 13 \ 4  04-page151
Design of a 2 3/8' semi-expanding carburetter for the 8 litre Phantom II.2nd May 1933Box 13 \ 4  04-page152
Standardisation of a carburetter air silencer for a 40/50 model to reduce noise.3rd Feb 1933Box 13 \ 4  04-page153
Costs and implementation schedule for a new part on the 'P' Series chassis.8th Jul 1933Box 13 \ 4  04-page154
Standardisation sheet for the deletion of the governor throttle control on the carburettor.22th Apr 1933Box 13 \ 4  04-page155
Tests and modifications to a Phantom II throttle spring arrangement to resolve sluggish movement.9th May 1933Box 13 \ 4  04-page156
Spring lengths and loads for a throttle and accelerator pedal assembly, part L.E.C.3412.9th May 1933Box 13 \ 4  04-page157
Request to the No.1 Erecting Shop to loan a complete petrol supply system for a Phantom II to the Experimental Department.17th May 1933Box 13 \ 4  04-page158
Request to manufacture an adjustable air silencer for an 8 litre Phantom for experimental tests.20th May 1933Box 13 \ 4  04-page159
The inadequacy of the petrol supply for the 8-litre engine.20th May 1933Box 13 \ 4  04-page160
Provisional specification document concerning resonance air silencers.8th Jun 1933Box 13 \ 4  04-page161
To slow the production of floats for semi-expanding Phantom carburetters due to a discovered issue.13th Jun 1933Box 13 \ 4  04-page162
Flooding issue with production carburetters and an urgent request for different floats for testing.13th Jun 1933Box 13 \ 4  04-page163
Production plans for carburettors, air silencers, and a new breather scheme for the Bentley.15th Jun 1933Box 13 \ 4  04-page164
Modification to the Phantom II semi-expanding carburetter to prevent flooding on inclines.30th Jun 1933Box 13 \ 4  04-page165
Comparative test results for a new light float versus a standard float in a carburetter on Shardlow Road.30th Jun 1933Box 13 \ 4  04-page166
Power curve data for a Phantom II No.7 large bore unit with a semi-expanding carburettor at different float levels.12th Sep 1933Box 13 \ 4  04-page167
Requesting a detail drawing for the air intake of a Large Phantom II Semi-Expanding Carburetter.12th Sep 1933Box 13 \ 4  04-page168
Request for parts to test a large Phantom carburettor and an urgent need for an air intake for the 27-EX French test.14th Sep 1933Box 13 \ 4  04-page169
Requesting tests on a worm and wheel controlled throttle edge adjustment for a carburetter before production.19th Sep 1933Box 13 \ 4  04-page170
Instructional memo for a new worm and wheel controlled throttle adjustment for a carburetter.22th Sep 1933Box 13 \ 4  04-page171
Instructions for a modified slow running adjustment scheme for a Phantom II carburetter.26th Sep 1933Box 13 \ 4  04-page172
Blueprint alteration for the Phantom II Semi-Expanding Carburetter.27th Sep 1933Box 13 \ 4  04-page173
Comparison curve for an old type carburetter and camshaft versus a new type, at the same compression ratio.6th Nov 1933Box 13 \ 4  04-page174
Development and testing report on the Phantom semi-expanding carburetter.6th Nov 1932Box 13 \ 4  04-page175
Modifications and testing of a carburettor and air silencer system.6th Nov 1933Box 13 \ 4  04-page176
Test results for a silencer under various configurations measuring BHP loss and back pressure at 3000 R.P.M.6th Nov 1933Box 13 \ 4  04-page177
Blueprint graph comparing power outputs for the 7.67 Litre Phantom II engine with an open exhaust.3rd Oct 1933Box 13 \ 4  04-page178
Blueprint for a modification to a main jet sleeve.7th Nov 1933Box 13 \ 4  04-page179
Blueprint detailing a modification to a Needle Valve for a Phantom Lec 31.32.7th Nov 1933Box 13 \ 4  04-page180


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