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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Blueprint updates for the Phantom II Semi-Expanding Carburetter, detailing replacement part numbers for the float assembly.16th Apr 1932Box 13 \ 3  03-page416
Proposal for the control of an expanding carburetter, suggesting specific settings for normal running, warming up, and starting.22th Apr 1932Box 13 \ 3  03-page417
Blueprint for a steering wheel-mounted mixture control for a semi-expanding carburettor PII.21th Apr 1932Box 13 \ 3  03-page418
The initial chassis tests of a new semi-expanding carburettor, detailing performance, modifications, and starting issues.25th Apr 1932Box 13 \ 3  03-page419
Carburetter performance, detailing issues with slow running, mixture control, noise, and fuel build-up.25th Apr 1932Box 13 \ 3  03-page420
Calculations and design considerations for carburettor air silencers on the Phantom II.2nd May 1932Box 13 \ 3  03-page421
Power output curves for the Phantom II with various carburettors and silencer losses.12th May 1932Box 13 \ 3  03-page422
Graph comparing power output with a 5.25 compression ratio under four different carburettor and intake setups.23th May 1932Box 13 \ 3  03-page423
Parts to be incorporated into two semi-expanding carburetters.23th May 1932Box 13 \ 3  03-page424
Scheme to overcome air lock trouble in the Semi-Expanding Carburetter Ph.II.9th Jun 1932Box 13 \ 3  03-page425
Design and production of a resonance silencer and semi-expanding carburetter.10th Jun 1932Box 13 \ 3  03-page426
Resonance air silencer tests for carburettor roar on a Phantom II semi-expanding carburettor.15th Jun 1932Box 13 \ 3  03-page427
Performance of a new semi-expanding carburettor compared to previous models.1st Jun 1932Box 13 \ 3  03-page428
Patent infringement and royalty payments for the expanding carburetter.18th Jun 1932Box 13 \ 3  03-page429
Test report on the Phantom II semi-expanding carburetter, detailing weaknesses and potential improvements.20th Jun 1932Box 13 \ 3  03-page430
Carburetter starting and slow running issues, including proposed solutions.20th Jun 1932Box 13 \ 3  03-page431
Test results and specifications for carburettor acceleration and metering.20th Jun 1932Box 13 \ 3  03-page432
Carburetter adjustments, focusing on quick thread adjustment, suction piston performance, and float material.20th Jun 1932Box 13 \ 3  03-page433
Cross-section drawings comparing a modified carburetor component with a later version.20th Jun 1932Box 13 \ 3  03-page434
Blueprint for a modification to a slow running body for an expanding carburettor.20th Jun 1932Box 13 \ 3  03-page435
Acceleration and expanding carburettor tests at Brooklands.13th Jul 1932Box 13 \ 4  04-page001
Performance testing data from Brooklands, including lap times, speeds, and acceleration with different tyre configurations.13th Jul 1932Box 13 \ 4  04-page002
Performance and acceleration test results at Brooklands using a standard carburettor.14th Jul 1932Box 13 \ 4  04-page003
Valve timing, tappet clearance, valve lift, and tyre specifications for the 22-EX model.14th Jul 1932Box 13 \ 4  04-page004
Development of a Phase II semi-expanding carburetter and an accompanying blueprint.14th Jul 1932Box 13 \ 4  04-page005
Mixture control of a semi-automatic carburetter.18th Jul 1932Box 13 \ 4  04-page006
Necessary modification to the jet feed of a Phantom II Semi-Expanding Carburetter.19th Jul 1932Box 13 \ 4  04-page007
Requesting an update on when new type carburetters for a Phantom II car will be ready for fitting.20th Jul 1932Box 13 \ 4  04-page008
New larger carburettors for the Phantom II model following tests at Brooklands.22th Jul 1932Box 13 \ 4  04-page009
Car performance test results comparing a semi-expanding carburetter against standard and S.U. models at Brooklands.23th Jul 1932Box 13 \ 4  04-page010
Brooklands tests comparing different induction systems, including open exhaust, cut-out, and a long-type silencer.23th Jul 1932Box 13 \ 4  04-page011
Engine performance test results, including speeds achieved with different exhaust and silencer configurations.23th Jul 1932Box 13 \ 4  04-page012
Comparison of large 6-cylinder engine performance against proposed 12 and 18-cylinder units following a visit to the U.S.A.23th Jul 1932Box 13 \ 4  04-page013
Taxation difficulties and market justification for a 12-cylinder power unit for the Phantom II model.23th Jul 1932Box 13 \ 4  04-page014
Data sheet detailing mean lap speeds achieved with various carburetor and silencer configurations.23th Jul 1932Box 13 \ 4  04-page015
Performance data sheet comparing mean lap speeds with different carburettor configurations.19th Jul 1932Box 13 \ 4  04-page016
Graph comparing the acceleration of the 22 EX and 25 EX models with different engine configurations.19th Jul 1932Box 13 \ 4  04-page017
Graph showing the effect of different carburettor needles on acceleration.7th Jul 1928Box 13 \ 4  04-page018
Graph comparing power output with a 5.25 compression ratio using various carburettor and component configurations.7th Jul 1928Box 13 \ 4  04-page019
Graph comparing power output against RPM for four different carburettor and intake configurations with a 5.25 compression ratio.3rd May 1932Box 13 \ 4  04-page020
Graph comparing power output (B.HP vs R.P.M.) for various carburetor, exhaust, and silencer configurations.16th Aug 1932Box 13 \ 4  04-page021
The Phantom II (19-EX) car's semi-expanding carburetter following a 10,000-mile test in France.16th Aug 1932Box 13 \ 4  04-page022
Petrol pump failures and governor performance on a 19-EX car.16th Mar 1932Box 13 \ 4  04-page023
Comparative fuel consumption tests between car models 19-EX and 25-EX.16th Aug 1932Box 13 \ 4  04-page024
Development stages and specification for the semi-expanding carburetter.25th Aug 1932Box 13 \ 4  04-page025
Specification sheet for an expanding carburetter (P.II).24th Aug 1932Box 13 \ 4  04-page026
Blueprint for an Actuating-Rod (Main Jet).24th Aug 1932Box 13 \ 4  04-page027
Technical drawing of an actuating rod nut.24th Aug 1937Box 13 \ 4  04-page028
Experimental drawing of a Needle Valve (A1) showing taper dimensions.24th Aug 1977Box 13 \ 4  04-page029
Blueprint detailing modifications to a diffuser for an experimental carburettor.24th Aug 1932Box 13 \ 4  04-page030
Blueprint of a modification to a carburettor diffuser body assembly.23th Aug 1932Box 13 \ 4  04-page031
The design of a separate starting carburetter for the Phantom II model.6th Sep 1932Box 13 \ 4  04-page032
Standardisation sheet and introduction of a new semi-expanding carburettor for the Continental type chassis.7th Sep 1932Box 13 \ 4  04-page033
Instructions for the adjustment of the Phantom II semi-expanding carburetter.21th Sep 1932Box 13 \ 4  04-page034
Instructions for mixture control, low speed jet setting, and slow running unit assembly.21th Sep 1932Box 13 \ 4  04-page035
Instructions for carburettor mixture control, starting procedures, and high-speed jet settings.21th Sep 1932Box 13 \ 4  04-page036
Specifications for carburetor components including the suction piston, taper needle valve, and diffuser.21th Sep 1932Box 13 \ 4  04-page037
Description of the general construction and petrol flow within the carburetter.21th Sep 1932Box 13 \ 4  04-page038
Cold starting issues with the R.R. Phantom II Semi Expanding Carburetter, detailing modifications made to improve performance.28th Sep 1932Box 13 \ 4  04-page039
Drawing of the Body (Slow Running Jet) for a Semi-Expanding Carburettor.28th Sep 1932Box 13 \ 4  04-page040
Confirming parts and modifications for a semi-expanding carburetter.30th Sep 1932Box 13 \ 4  04-page041
The need for sketch Hs.719 on production carburetters, pending cold weather for testing.3rd Oct 1932Box 13 \ 4  04-page042
Confirming the deletion of the small gauze filter for the low speed jet on the Phantom II Carburetter.4th Oct 1932Box 13 \ 4  04-page043
Confirming a new taper needle (V.1438) following road tests for the Phantom II Semi-Expanding carburettor.26th Oct 1932Box 13 \ 4  04-page044
Blueprint of a taper needle for a semi-experimental carburettor.2nd Nov 1942Box 13 \ 4  04-page045
Weakness and proposed spring-based fix for the Phantom semi-expanding carburetter's acceleration metering.17th Oct 1932Box 13 \ 4  04-page046
Consumption and acceleration tests on a semi-expanding carburetter.7th Nov 1932Box 13 \ 4  04-page047
Modifications to the air valve, needle, and diffuser to improve fuel mixture and consumption.8th Nov 1932Box 13 \ 4  04-page048
The development and starting difficulties of the new R.R. Semi Expanding Carburetter.8th Nov 1932Box 13 \ 4  04-page049
Improving carburettor efficiency, control, and starting procedures.8th Nov 1932Box 13 \ 4  04-page050
Decision to retain the standard starter carburetter for the Phantom II vehicle following testing.10th Nov 1932Box 13 \ 4  04-page051
Starting reliability issues with the semi-expanding carburetter on the Phantom II.11th Nov 1932Box 13 \ 4  04-page052
Starting difficulties with the Phantom II semi-expanding carburetter and proposing an experimental modification.12th Nov 1932Box 13 \ 4  04-page053
Instruction regarding the semi-expanding carburetter and slow running device for the 40/50 HP O.2 series.23th Nov 1932Box 13 \ 4  04-page054
Requesting instructions for tests on a Phantom II carburetter to understand the effects of the low-speed jet on a starting carburettor.14th Nov 1932Box 13 \ 4  04-page055
Power loss tests conducted on resonance air silencers for a Phantom II semi-expanding carburettor.25th Nov 1932Box 13 \ 4  04-page056
Tests conducted on Phantom II Semi Expanding Carburettor air silencers.22th Nov 1932Box 13 \ 4  04-page057
Drawing of a telescopic experimental air silencer.22th Nov 1932Box 13 \ 4  04-page058
Report page detailing experiments on an air intake system with a sketch of two tuning chambers.22th Nov 1932Box 13 \ 4  04-page059
Hand-drawn diagram illustrating modifications to a pipe, likely an air intake, with specified dimensions and hole patterns.22th Nov 1932Box 13 \ 4  04-page060
Testing twin S.U. carburettors and silencers on model 19.G.IV.22th Nov 1932Box 13 \ 4  04-page061
Performance graph comparing engine output with and without an AC Air Silencer for a J.3 Head unit.3rd Nov 1932Box 13 \ 4  04-page062
Tests conducted on a Phantom II semi-expanding carburetter, focusing on intake silencer design and efficiency.3rd Nov 1932Box 13 \ 4  04-page063
Tests to cure air intake roar on a Phantom II using a de-tuner with a semi-expanding carburetter.14th Oct 1932Box 13 \ 4  04-page064
Report page detailing tests on plunger position and a sketch of an air silencer and de-tuning chamber.14th Oct 1932Box 13 \ 4  04-page065
Road and dynamometer tests of an air silencer on experimental cars (20-EX, 22-EX).10th Nov 1932Box 13 \ 4  04-page066
The decision to retain the standard starter carburetter for the Phantom II following tests on a semi-expanding carburetter.10th Nov 1932Box 13 \ 4  04-page067
The development and testing of carburetter intake silencers, including comparisons with American designs.28th Nov 1932Box 13 \ 4  04-page068
The design and development of an A.C. Silencer for a 5-litre engine.28th Nov 1932Box 13 \ 4  04-page069
Test report on alternative designs and fitments for a semi-expanding carburetter air intake silencer.28th Nov 1932Box 13 \ 4  04-page070
Intake silencer tests, comparing efficiency, power loss, and weight for various designs.28th Nov 1932Box 13 \ 4  04-page071
Recommendation for an intermediate-sized air intake silencer, illustrated with a photograph of it fitted to an engine.28th Nov 1932Box 13 \ 4  04-page072
Blueprint detailing designs for resonance silencers for a semi-expanding carburettor.28th Nov 1932Box 13 \ 4  04-page073
Blueprint comparing two designs of Phantom II intake resonance silencers for a semi-expanding carburetter.28th Nov 1932Box 13 \ 4  04-page074
Blueprint showing two types of American intake silencers for Chrysler and Nash vehicles.28th Nov 1932Box 13 \ 4  04-page075
Blueprint showing a typical A.C. silencer for a 5-litre car.29th Nov 1932Box 13 \ 4  04-page076
Modifications to be carried out on a Phantom II semi expanding carburetter from car 58-GN.29th Nov 1932Box 13 \ 4  04-page077
Modifications to the Phantom II Semi-Expanding Carburetter.30th Nov 1932Box 13 \ 4  04-page078
Modifications to the Phantom II Semi-Expanding Carburetter.30th Nov 1932Box 13 \ 4  04-page079
Reduction in clearance for the Semi Expanding Carburetter's Air Valve Centre Spindle and bush.7th Dec 1932Box 13 \ 4  04-page080


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