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
Letter to The S.U. Company regarding the design and testing of carburetters and petrol pumps.4th Feb 1933Box 31 \ 5  Scan014
Internal order request for two 1 5/8 inch diameter S.U. throttle carburettors.7th Feb 1933Box 31 \ 5  Scan015
Letter to The S.U. Company regarding seizure issues with brass carburettor throttle spindles, recommending a switch to steel.10th Feb 1933Box 31 \ 5  Scan016
Letter from The S.U. Company regarding the supply of carburettor spindles.11th Feb 1933Box 31 \ 5  Scan017
Letter to the S.U. Company regarding carburettor bore sizes and a request for three carburettors.15th Feb 1933Box 31 \ 5  Scan018
Drawing of an induction pipe for three carburettors.15th Feb 1933Box 31 \ 5  Scan019
Stamped document from the Print Room in Derby.15th Feb 1933Box 31 \ 5  Scan020
Letter from The S.U. Company correcting the number of carburettors required and discussing induction pipe diameter.16th Feb 1933Box 31 \ 5  Scan021
Letter from S. Smith & Sons regarding a model of an automatic jet control with metallic bellows.28th Feb 1933Box 31 \ 5  Scan022
Issue with automatic jet control parts for S.U. carburetters and arranging for a new set from Smiths.2nd Mar 1933Box 31 \ 5  Scan023
Letter to S. Smith & Sons regarding the dimensions of bellows for an automatic jet control.2nd Mar 1933Box 31 \ 5  Scan024
Letter from S. Smith & Sons regarding a Blue Print for an Automatic Jet Control.3rd Mar 1933Box 31 \ 5  Scan025
Letter from S. Smith & Sons (Motor Accessories) Ltd chasing the return of an Automatic Jet Control unit on loan.13th Mar 1933Box 31 \ 5  Scan026
Letter from S. Smith & Sons confirming the dispatch of an Automatic Jet Control for testing.14th Mar 1933Box 31 \ 5  Scan027
Letter to S. Smith & Sons disputing a charge for experimental work on an S.U. Carburetter automatic jet control.14th Mar 1933Box 31 \ 5  Scan028
Test report on S.U. carburettors for a 19-G-IV chassis, including modifications to an induction pipe balance piece.16th Mar 1933Box 31 \ 5  Scan029
Testing various induction pipes and balance pieces to reduce noise and improve engine performance.17th Mar 1933Box 31 \ 5  Scan030
Letter to the S.U. Company regarding the testing of their carburettors and a request for a smaller size.17th Mar 1933Box 31 \ 5  Scan031
Performance graph for twin 3/8 inch S.U. carburettors on a Peregrine II No. 5 Unit engine.18th Mar 1933Box 31 \ 5  Scan032
Severely faded and almost entirely illegible typed document, likely a carbon copy, with a clear date stamp.18th Mar 1933Box 31 \ 5  Scan033
Preliminary tests on twin S.U. carburetters for the Peregrine engine.20th Mar 1933Box 31 \ 5  Scan034
Follow-up letter from Electric Heating & Hardware Ltd. regarding a patented serrated needle for S.U. Carburetters.20th Mar 1933Box 31 \ 5  Scan035
Apology letter from S. Smith & Sons regarding a loan account misunderstanding and the supply of a replacement Jet Control unit.21th Mar 1933Box 31 \ 5  Scan036
Letter to Messrs S. Smith & Sons concerning the return of a thermostat jet control.27th Mar 1933Box 31 \ 5  Scan037
Letter to Electric Heating & Hardware Ltd declining to proceed with a job for serrated needles.29th Mar 1933Box 31 \ 5  Scan038
Letter to The S.U. Company concerning the supply and development of carburetters.31th Mar 1933Box 31 \ 5  Scan039
Letter from S. Smith & Sons regarding proposed tests for an automatic jet control system.3rd Apr 1933Box 31 \ 5  Scan040
Letter to The S.U. Company returning incorrectly sized carburetters and requesting a supply of No.6 needles.5th Apr 1933Box 31 \ 5  Scan041
Diagram and explanation of an S.U. petrol pump failure due to a broken fibre disc.6th Apr 1933Box 31 \ 5  Scan042
Letter from The S.U. Company regarding H.V.3 carburetters and the sending of No.6 needles.6th Apr 1933Box 31 \ 5  Scan043
The dispatch of a pair of S.U. carburettors and throttle couplings back to the S.U. Co.6th Apr 1933Box 31 \ 5  Scan044
Letter from The S.U. Company regarding the specification and delivery of carburetters.8th Apr 1933Box 31 \ 5  Scan045
Confirming that aluminium parts for Bensport S.U. Carburetters requiring a scratch brush finish must be made from RR. alloy.10th Apr 1933Box 31 \ 5  Scan046
Finishing of a casting for S.U. Carburetters and timing the required operation.10th Apr 1933Box 31 \ 5  Scan047
Letter to S. Smith & Sons Ltd regarding the fitting of an experimental car with an Automatic Jet Control.11th Apr 1933Box 31 \ 5  Scan048
Letter from S. Smith & Sons (Motor Accessories) Ltd regarding Automatic Jet Control.12th Apr 1933Box 31 \ 5  Scan049
Letter from The S.U. Company regarding a request for drawings for two sample instruments for Bentley Carburetters.24th Apr 1933Box 31 \ 5  Scan050
Bentley carburation, comparing different induction pipe designs and the effects of an intake silencer.2nd May 1933Box 31 \ 5  Scan051
Weakest maintained consumption test results for 2 S.U. Carburetters.2nd May 1933Box 31 \ 5  Scan052
Graph comparing engine performance (B.HP vs R.P.M.) with different induction pipe configurations.28th Apr 1933Box 31 \ 5  Scan053
Stamped document from the Print Room in Derby.1st May 1933Box 31 \ 5  Scan054
Internal order request for one pair of Bentley carburettors from the S.U. Company.3rd May 1933Box 31 \ 5  Scan055
Letter to The S.U. Company regarding an order for a pair of Bentley carburetters.3rd May 1933Box 31 \ 5  Scan056
Letter from The S.U. Company regarding the return and refitting of experimental flat valves.25th May 1933Box 31 \ 5  Scan057
Letter to the S.U. Carburetter Co. regarding the return of unsatisfactory experimental flat valves.31th May 1933Box 31 \ 5  Scan058
Return of two flat valve acetate discs to the S.U. Carburetter Co.31th May 1933Box 31 \ 5  Scan059
Letter to The S.U. Company regarding component specifications and scheduling work on carburetters.14th Jun 1933Box 31 \ 5  Scan060
Letter from The S.U. Company regarding washers, a project delay due to Le Mans, and difficulties with new carburetters.15th Jun 1933Box 31 \ 5  Scan061
Letter to The S.U. Company regarding carburetter needle valve restrictions and potential solutions for the Bentley car.15th Jun 1933Box 31 \ 5  Scan062
Graph plotting the delivery performance in Pints per Hour against Pump RPM for a Bensport No. 4 Petrol Pump under various test conditions.7th Jun 1933Box 31 \ 5  Scan063
Blank page with a Print Room date stamp from the Derby factory.15th Jun 1933Box 31 \ 5  Scan064
Letter to The S.U. Company regarding blueprints and specifications for a suction chamber and cap.21th Jun 1933Box 31 \ 5  Scan065
Letter from The S.U. Company regarding the supply of float chamber seatings and a suction chamber cap.19th Jun 1933Box 31 \ 5  Scan066
Blueprint for a Suction Chamber HV4 for Bentsport, to be made from an aluminium diecasting.16th May 1933Box 31 \ 5  Scan067
Blueprint for a suction chamber cap, made of brass with a dull nickel finish.24th Jun 1933Box 31 \ 5  Scan068
Letter to the S.U. Company regarding issues with their petrol pumps and carburation adjustments during testing.24th Jun 1933Box 31 \ 5  Scan069
Confirmation of a loan of S.U. Carburetters for testing the first 3 1/2 Litre Bentley Engine.26th Jun 1933Box 31 \ 5  Scan070
Letter from The S.U. Company to confirm a visit from Mr. Von de Becke.5th Jul 1933Box 31 \ 5  Scan071
Bensport petrol pump tests including modifications to S.U. carburetter float chamber covers.15th Jul 1933Box 31 \ 5  Scan072
Petrol pump delivery tests with various modifications to float chamber and needle seats.15th Jul 1933Box 31 \ 5  Scan073
Adjustments to a needle valve and seat to reduce restriction.15th Jul 1933Box 31 \ 5  Scan074
Diagram illustrating modifications to an S.U. float chamber cover for Bensport petrol pump tests.18th Jul 1933Box 31 \ 5  Scan075
Stamp from the Print Room in Derby, indicating the date of processing.20th Jul 1933Box 31 \ 5  Scan076
Letter to The S.U. Company regarding carburation tests and needle design for a 3.6 litre Bentley.20th Jul 1933Box 31 \ 5  Scan077
Comparison of numerical data for 'RRA' and 'EXP. NEEDLE'.20th Jul 1933Box 31 \ 5  Scan078
Data table comparing different S.U. carburettor needles for Bentley vehicles.15th Jul 1933Box 31 \ 5  Scan079
Data table and graph for 'BEN SPORT' SU HV3 piston recess testing.15th Jul 1933Box 31 \ 5  Scan080
Issues of slack in S.U. carburettor controls and confirming the location of the mixture control lever.20th Jul 1933Box 31 \ 5  Scan081
Lost movement in S.U. jet controls, recommending specific dimensions and materials for pins to reduce slackness.21th Jul 1933Box 31 \ 5  Scan082
Letter to the S.U. Company regarding backlash issues in carburetter mixture controls.22th Jul 1933Box 31 \ 5  Scan083
Letter from The S.U. Company regarding a justified complaint about carburetter pins.24th Jul 1933Box 31 \ 5  Scan084
Internal request to place an order for 2 dozen type RR.X carburetter needles from The S.U. Company.27th Jul 1933Box 31 \ 5  Scan085
Comparison test report for S.U. carburettor needles, type RR.X versus RR.A.27th Jul 1933Box 31 \ 5  Scan086
Letter to The S.U. Company requesting a further supply of needles following successful trials.27th Jul 1933Box 31 \ 5  Scan087
Test report on modifications to S.U. carburetter float chamber covers and needle seats.27th Jul 1933Box 31 \ 5  Scan088
Testing different pressure springs in pumps and the resulting delivery differences and flow restrictions.27th Jul 1933Box 31 \ 5  Scan089
Letter from The S.U. Company confirming the dispatch of 2 dozen RR.X needles.28th Jul 1933Box 31 \ 5  Scan090
Modifications to the float chamber needle and seating for Bentley S.U. Carburetters.29th Jul 1933Box 31 \ 5  Scan091
Confirming the dispatch of four pairs of needles for Bentley Carburation.1st Aug 1933Box 31 \ 5  Scan092
Letter to the S.U. Company detailing the stove enamelling process for Bentley carburettors.3rd Aug 1933Box 31 \ 5  Scan093
Troubles with Bentley petrol pumps, including vapour lock and carburation issues.3rd Aug 1933Box 31 \ 5  Scan094
Performance graph showing fuel consumption versus engine speed for a Bentley engine under different carburetion settings.31th Jul 1933Box 31 \ 5  Scan095
Stamped document from the Print Room in Derby.3rd Aug 1933Box 31 \ 5  Scan096
Enamelling process and materials for S.U. Carburetters.8th Aug 1933Box 31 \ 5  Scan097
Letter to the S.U. Carburetter Co. about carburettor finish and an investigation into petrol pumps on the continent, specifically the Autflux model, to avoid vapour lock.22th Aug 1933Box 31 \ 5  Scan098
Pump delivery spring strength, pressure settings, and positioning to avoid vapour lock.29th Aug 1933Box 31 \ 5  Scan099
Letter from The S.U. Company discussing the supply and stove enamelled finish of Bentley carburettors.29th Aug 1933Box 31 \ 5  Scan100
Article describing a 'Robot Strangler Control', an automatic device for regulating the fuel mixture when the engine is cold.2nd May 1933Box 31 \ 5  Scan101
Letter to The S.U. Company regarding the finish on a pair of stove enamelled carburettors.2nd Sep 1933Box 31 \ 5  Scan102
Request to the Order Office for a replacement float for a 1 5/8' S.U. carburetter.5th Sep 1933Box 31 \ 5  Scan103
Letter from The S.U. Company regarding the finish on a carburetter and instructions for a float chamber part.5th Sep 1933Box 31 \ 5  Scan104
Letter from The S.U. Company regarding samples of dull plate holding-up bolts for the Experimental Department.7th Sep 1933Box 31 \ 5  Scan105
Letter to the S.U. Company discussing the preferred finish for Bentley carburetter parts.8th Sep 1933Box 31 \ 5  Scan106
Page 2 of a letter to The S.U. Company discussing production alternatives.11th Sep 1933Box 31 \ 5  Scan107
Letter from The S.U. Company regarding the finish of Bentley Carburetters.11th Sep 1933Box 31 \ 5  Scan108
Modifications and road tests of a 1 1/2' S.U. carburetter to improve slow running.5th Oct 1933Box 31 \ 5  Scan109
Blueprint detailing modifications to a 1 5/8 S.U. carburettor piston.7th Oct 1933Box 31 \ 5  Scan110
Blueprint diagram of a 1 5/8 S.U. carburetter.5th Oct 1933Box 31 \ 5  Scan111
Blank document page with a 'PRINT ROOM' reception stamp.5th Oct 1933Box 31 \ 5  Scan112
Modifications to two 1 3/8' S.U. carburettors for Bentley carburation.6th Oct 1933Box 31 \ 5  Scan113


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