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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Official order be placed for parts from the Zenith Carburetter Co. Ltd.12th Nov 1935Box 20 \ 9  Scan018
Request to issue an official order for Stromberg carburetter parts for carburetter No. DB-32.15th Nov 1935Box 20 \ 9  Scan019
Performance report and specifications for a Stromberg carburetter D.B.42.16th Nov 1935Box 20 \ 9  Scan020
Letter from Zenith Carburetter Co. Ltd. regarding the supply and testing of various carburetter parts and models.20th Nov 1935Box 20 \ 9  Scan021
Letter from the Zenith Carburetter Co. confirming a carburetter has passed a petrol leak test.20th Nov 1935Box 20 \ 9  Scan022
Proposing the standardisation of the Duplex Downdraught Stromberg carburetter system for the Phantom III.21th Nov 1935Box 20 \ 9  Scan023
Parts affected by the change to a Duplex carburetter on the Phantom III.22th Nov 1935Box 20 \ 9  Scan024
Invoice from The Zenith Carburetter Co. Ltd. for nozzles and jets, seeking payment authorisation.22th Nov 1935Box 20 \ 9  Scan025
Letter to the Zenith Carburetter Co. Ltd. about sourcing twin Stromberg carburetters for an experimental twin six engine.23th Nov 1935Box 20 \ 9  Scan026
Letter urgently requesting information on the Stromberg carburetter within a fortnight.23th Nov 1935Box 20 \ 9  Scan027
Invoice from Zenith Carburetter Co. Ltd. for choke valves and a request for payment authorization.25th Nov 1935Box 20 \ 9  Scan028
Confirming the official order of carburetter pieces.26th Nov 1935Box 20 \ 9  Scan029
Letter to Zenith Carburetter Co. Ltd. regarding the return of duplicate Stromberg parts.26th Nov 1935Box 20 \ 9  Scan030
Request to manufacture a Cylindrical Petrol Float for experiments on a Stromberg Carburetter.26th Nov 1935Box 20 \ 9  Scan031
Instructing the dispatch of Stromberg carburetter parts to Zenith Carburetter Co. Ltd. due to an erroneous order duplication.26th Nov 1935Box 20 \ 9  Scan032
Letter from Zenith Carburetter Co. Ltd discussing manufacturing and delivery of a Twin Stromberg Carburetter.26th Nov 1935Box 20 \ 9  Scan033
Letter from The Zenith Carburetter Co. discussing the modification, delivery, and pricing of carburetters.26th Nov 1935Box 20 \ 9  Scan034
Letter from Zenith Carburetter Co. Ltd. providing tentative pricing for Twin Stromberg Carburetters.27th Nov 1935Box 20 \ 9  Scan035
Page 2 of a letter from The Zenith Carburetter Co. regarding a first-class carburetter job.27th Nov 1935Box 20 \ 9  Scan036
Letter to Daimler enquiring about a flooding issue with a Stromberg Downdraught Carburetter on a gradient.28th Nov 1935Box 20 \ 9  Scan037
Letter to The Zenith Carburetter Co. Ltd. acknowledging receipt of prices.29th Nov 1935Box 20 \ 9  Scan038
Internal order request for three E.E.3 Duplex downdraught Stromberg carburetters for a Phantom III.29th Nov 1935Box 20 \ 9  Scan039
The creation of official orders for Zenith and Stromberg carburettor parts.29th Nov 1935Box 20 \ 9  Scan040
Invoice from Zenith Carburetter Ltd. for carburettor parts.29th Nov 1935Box 20 \ 9  Scan041
Official order be passed to the Zenith Carburetter Co. for jets.3rd Dec 1935Box 20 \ 9  Scan042
Requesting alterations to the induction systems of two cars for development and testing purposes.4th Dec 1935Box 20 \ 9  Scan043
Invoice from Zenith Carburetter Co. Ltd. for H.S. Bleeds and a request for payment.9th Dec 1935Box 20 \ 9  Scan044
The results of testing a heated riser for a Duplex Stromberg Carburetter.10th Dec 1935Box 20 \ 9  Scan045
Potential flooding of Stromberg down-draught carburetters on an incline and inquiring about how American cars handle this issue.1st Dec 1935Box 20 \ 9  Scan046
Letter to Zenith Carburetter Co. Ltd. regarding the return of four defective bye-pass jets.13th Dec 1935Box 20 \ 9  Scan047
Requesting the manufacture of 3 pairs of chokes for Stromberg carburetters for the Phantom III.13th Dec 1935Box 20 \ 9  Scan048
Requesting the production of a brass induction system for the Ph.III Stromberg Duplex Carburetter.13th Dec 1935Box 20 \ 9  Scan049
Issue of Stromberg carburetter flooding on gradients.13th Dec 1935Box 20 \ 9  Scan050
Requesting an official order for H.S. Bleeds from Zenith Carburetter Co. Ltd.9th Dec 1935Box 20 \ 9  Scan051
Telegram requesting a supply of three sets of parts for spring-loaded hand-controlled throttle chokes.16th Dec 1935Box 20 \ 9  Scan052
Letter from The Zenith Carburetter Co. Ltd concerning the dispatch of parts for a Hand Strangler Control conversion.16th Dec 1935Box 20 \ 9  Scan053
Proposal, pricing, and delivery of Stromberg carburettors for the Phantom III model from the Zenith Company.16th Dec 1935Box 20 \ 9  Scan054
Questioning the benefits and drawbacks of down draught Stromberg carburetters, referencing flooding issues.17th Dec 1935Box 20 \ 9  Scan055
To swap engine components between two cars to test an automatic carburetter scheme against a hand-controlled one.17th Dec 1935Box 20 \ 9  Scan056
Letter to The Zenith Carburetter Co. Ltd. regarding an incorrectly supplied carburetter and an urgent modification required for a petrol leak.18th Dec 1935Box 20 \ 9  Scan057
Letter detailing modifications and specifications for DA-42 carburetors.1st Dec 1935Box 20 \ 9  Scan058
Duplex Stromberg carburetter modification for the Phantom III.20th Dec 1935Box 20 \ 9  Scan059
Letter from Zenith Carburetter Co. Ltd apologising for delays due to moving factory and acknowledging an issue with a D.A. Carburetter.21th Dec 1935Box 20 \ 9  Scan060
Explaining the decision to use a downdraught carburetter on the big bore 20/25 engine.21th Dec 1935Box 20 \ 9  Scan061
Three cold start tests performed on a Stromberg Carburetter.21th Dec 1935Box 20 \ 9  Scan062
Letter from Bendix to Zenith discussing carburetter components like throttle shafts, pump nozzles, and electric choke units.23th Dec 1935Box 20 \ 9  Scan063
Letter from Bendix Products Corporation regarding the performance of automatic choke set-ups.30th Dec 1935Box 20 \ 9  Scan064
Invoice for carburettor parts from Zenith Carburetter Co. and authorising payment.30th Dec 1935Box 20 \ 9  Scan065
Letter to Zenith Carburetter Co. Ltd. inquiring about a Stromberg Carburetter shut-off scheme.30th Dec 1935Box 20 \ 9  Scan066
Letter to The Zenith Carburetter Co. Ltd. regarding a delayed order for EE-3 duplex carburetters and providing the required specification.1st Jan 1936Box 20 \ 9  Scan067
Request for a set of parts for an EE-3 carburetter.1st Jan 1936Box 20 \ 9  Scan068
Observations on carburetter testing apparatus at Strombergs.2nd Jan 1936Box 20 \ 9  Scan069
Blueprint of Stromberg equipment for testing aero engines.1st Jan 1935Box 20 \ 9  Scan070
Blank document page stamped by the Print Room in Derby.1st Jan 1935Box 20 \ 9  Scan071
Requesting an official order be passed to the Zenith Carburetter Co. for parts already received.3rd Jan 1936Box 20 \ 9  Scan072
Internal request to order two Stromerg carburettors type DA.42 with detailed setting specifications.6th Jan 1936Box 20 \ 9  Scan073
Performance comparison and analysis of a Duplex Down Draught Carburetter for the Phantom III.7th Jan 1936Box 20 \ 9  Scan074
Continued report on carburettor modifications, discussing mixture distribution, throttle response, and material changes for weight saving.7th Jan 1936Box 20 \ 9  Scan075
To place an order for a Buick transmission assembly and Zenith carburetter parts.7th Jan 1936Box 20 \ 9  Scan076
Invoice from Zenith Carburetter Co. Ltd. for By Pass Jets.8th Jan 1936Box 20 \ 9  Scan077
Procedural issues with invoicing and requisitioning for parts supplied by Stromberg & Zenith Carburetter Co.10th Jan 1936Box 20 \ 9  Scan078
Letter to the Zenith Carburetter Co. Ltd. regarding an incorrect invoice for faulty, returned By-Pass Jets.10th Jan 1936Box 20 \ 9  Scan079
Specification sheet for a DA-42 Stromberg Carburetter, model 18-G-IV (Large Bore).11th Jan 1936Box 20 \ 9  Scan080
Final specification and performance notes for a Stromberg carburetter on car 21-C-IV (Large Bore).15th Jan 1936Box 20 \ 9  Scan081
Settings and modifications for a Stromberg DA-42 carburetter on car 20-G-IV.13th Jan 1936Box 20 \ 9  Scan082
Specification of a DB-42 Stromberg Carburetter and other component modifications for car 19-G-IV.13th Jan 1936Box 20 \ 9  Scan083
Replacement Bypass Jets and a potential invoice error with Zenith Carburetter Co.13th Jan 1936Box 20 \ 9  Scan084
Visit to the Zenith Carburetter Co. Ltd. to discuss the production of carburetters.17th Jan 1936Box 20 \ 9  Scan085
Suggestion to expedite carburetter production for early testing and an offer of support.17th Jan 1936Box 20 \ 9  Scan086
Official order for parts received from the Zenith Carburetter Co.20th Jan 1936Box 20 \ 9  Scan087
Requesting an order of 6 metering jets for a 25 HP Stromberg Carburetter.21th Jan 1936Box 20 \ 9  Scan088
The development and performance of a new turbulent cylinder head and induction pipe drain for the Large Bore 20/25 model.22th Jan 1936Box 20 \ 9  Scan089
Review of the clutch position and flywheel orders for the 20/25 and 20/27 models to suit the Borg & Beck clutch.22th Jan 1936Box 20 \ 9  Scan090
Test report on the induction pipe drainage scheme for a 25/30 HP engine.22th Jan 1936Box 20 \ 9  Scan091
Induction pipe drain tests, noting flow rates and design adaptations.22th Jan 1936Box 20 \ 9  Scan092
Proposal to use bronze throttle bodies for Stromberg carburettors instead of the standard cast-iron.22th Jan 1936Box 20 \ 9  Scan093
Graph of air/fuel ratio versus engine RPM for a 25/30 HP engine with a Stromberg DA 42 carburettor at full and half throttle.22th Jan 1936Box 20 \ 9  Scan094
Blank page with a print room stamp.22th Jan 1936Box 20 \ 9  Scan095
Power comparison graph for the 20/25 HP and 25/30 HP engines, plotting BHP and BMEP against RPM.2nd Jan 1936Box 20 \ 9  Scan096
Drawing showing a modification to an induction pipe for a 25/30 HP engine.22th Jan 1936Box 20 \ 9  Scan097
Blank document page stamped by the Print Room in Derby.22th Jan 1936Box 20 \ 9  Scan098
Specifications for the DA.42 Stromberg carburetter, unit C-16.22th Jan 1936Box 20 \ 9  Scan099
Summary of settings and modifications for a Stromberg DB.42 carburetter on unit E-3-M.22th Jan 1936Box 20 \ 9  Scan100
Proposal to order 50 American-made Stromberg Carburetters for the Phantom III chassis due to production difficulties and time constraints.22th Jan 1936Box 20 \ 9  Scan101
Sourcing, pricing, and delivery of proposed Stromberg Carburetters for the Phantom III model.16th Dec 1935Box 20 \ 9  Scan102
Choice of material (cast iron vs. bronze) for Stromberg carburettor bodies.23th Jan 1936Box 20 \ 9  Scan103
Sourcing of Stromberg carburettors for the Phantom III chassis, arguing for domestic manufacture over importation.23th Jan 1936Box 20 \ 9  Scan104
Carburetter production options for the Phantom III, comparing American versus English manufacturing.1st Jan 1936Box 20 \ 9  Scan105
Material choice for Stromberg carburettor bodies, advocating for cast iron over other options.23th Jan 1936Box 20 \ 9  Scan106
Cover letter for a report on performance issues with the Phantom III Induction System road tests.24th Jan 1936Box 20 \ 9  Scan107
Modifications to the Phantom III induction system and comparative tests.24th Jan 1936Box 20 \ 9  Scan108
Performance graph comparing power curves for three different induction systems on a Phantom III engine.22th Jan 1936Box 20 \ 9  Scan109
Stamped by the print room upon receipt.25th Jan 1936Box 20 \ 9  Scan110
Requesting an official order for parts, with the exception of the Seating & Needle Assembly.25th Jan 1936Box 20 \ 9  Scan111
Invoice from Zenith Carburetter Co. Ltd. requiring a check against an internal order.23th Jan 1936Box 20 \ 9  Scan112
Report on a Stromberg carburetter and requesting further checks on the accelerator pump spindle.31th Jan 1936Box 20 \ 9  Scan113
Confirming a credit note from The Zenith Carburetter Co. Ltd. has been received to cancel an invoice for By Pass Jets.3rd Feb 1936Box 20 \ 9  Scan114
Letter to The Zenith Carburetter Co. Ltd. enquiring about the delivery status of 3 duplex Stromberg carburettors.3rd Feb 1936Box 20 \ 9  Scan115
Modifications to the Phantom III Duplex Stromberg Downdraught Induction System and subsequent performance improvements.11th Feb 1936Box 20 \ 9  Scan116
Outstanding tests required for a petrol drain system and overflow vent pipe.11th Feb 1936Box 20 \ 9  Scan117


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