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 from The S.U. Company enclosing two copies of the general arrangement drawing for the Kestrel engine carburettor.3rd Jul 1934Box 31 \ 5  Scan214
The receipt and forwarding of S.U. carburetter drawings for contract action.4th Jul 1934Box 31 \ 5  Scan215
The handover of S.U. Carburetter drawings to hasten a contract for two sets.5th Jul 1934Box 31 \ 5  Scan216
Letter from the S.U. Company regarding potential patent infringements by Claudel Hobson on aero carburetters.7th Jul 1934Box 31 \ 5  Scan217
Internal memorandum regarding S.U. Carburetters, royalty payments, and needle supplies for the 20/25 HP model.9th Jul 1934Box 31 \ 5  Scan218
Letter from The S.U. Co. regarding carburetter royalties and the production and delivery of needles.9th Jul 1934Box 31 \ 5  Scan219
Letter to The S.U. Company regarding the supply of carburetter needles.9th Jul 1934Box 31 \ 5  Scan220
Letter to The S.U. Carburetter Co. outlining a proposed agreement for a new carburetter design based on S.U. patents.13th Jul 1934Box 31 \ 5  Scan221
Attaching a copy of a letter received from the S.U. Company agreeing to proposals.18th Jul 1934Box 31 \ 5  Scan222
Letter from The S.U. Company agreeing to the manufacturing arrangements for the new S.U. Carburetter.16th Jul 1934Box 31 \ 5  Scan223
Letter from The S.U. Company regarding a delay in dispatching carburettors and pumps for a Bentley.17th Jul 1934Box 31 \ 5  Scan224
The poor finish of S.U. Carburetters and a request for larger delivery quantities.19th Jul 1934Box 31 \ 5  Scan225
Blueprint of a dual-barrel component with associated linkage, possibly a carburetor.26th Jan 1934Box 31 \ 5  Scan226
Letter from The S.U. Company regarding a revised print of SU.0124 with alterations.19th Jul 1934Box 31 \ 5  Scan227
Letter to The S.U. Company regarding petrol pumps and carburetter float chamber covers.23th Jul 1934Box 31 \ 5  Scan228
Letter from The S.U. Company regarding new castings for an S.U. 0124 float chamber and requesting material specifications.26th Jul 1934Box 31 \ 5  Scan229
Letter to S.U. Carburetter Co. Ltd. regarding modifications to a float chamber pattern and a supercharger case.27th Jul 1934Box 31 \ 5  Scan230
Internal request to issue an official order for petrol pumps and carburettors to the S.U. Co.14th Jul 1934Box 31 \ 5  Scan231
Letter from The S.U. Company regarding a supercharged casing and carburetter parts.1st Aug 1934Box 31 \ 5  Scan232
Request to S.U. Company Ltd. for 6 experimental needles with specified dimensions for use on a 3½ litre Bentley.22th Aug 1934Box 31 \ 5  Scan233
Letter to S.U. Company Ltd. regarding a carburettor float chamber stud problem.13th Sep 1934Box 31 \ 5  Scan234
Requesting the modification of two air valves for a Bentley carburation system.18th Sep 1934Box 31 \ 5  Scan235
Letter from The S.U. Company regarding an enclosed installation drawing and the transfer of a carburetter.24th Sep 1934Box 31 \ 5  Scan236
Letter to The S.U. Company regarding flooding issues in Bentley carburettors, suggesting a fault in the float mechanism.24th Sep 1934Box 31 \ 5  Scan237
Invoice from S.U.Co for an experimental Kestrel Aero Engine carburetter.28th Sep 1934Box 31 \ 5  Scan238
Hs. to Roy requesting an order be placed with S.U. Carburetters Ltd. for a Kestrel engine part.4th Oct 1934Box 31 \ 5  Scan239
Letter to The S.U. Co. Ltd. regarding flooding carburetter issues caused by rough needles and a discussion on fuel pump core specifications.19th Oct 1934Box 31 \ 5  Scan240
Letter requesting to be informed of any future modifications to pumps or carburetters.19th Oct 1934Box 31 \ 5  Scan241
Modified S.U. carburetter float chamber design.24th Oct 1934Box 31 \ 5  Scan242
Test report comparing the performance of standard A.W. needles and new experimental needles on S.U. carburettors fitted to two Bentley cars.25th Oct 1934Box 31 \ 5  Scan243
Carburettor performance, comparing lap speeds with new and old type carburetters on a 20/25HP car.25th Oct 1934Box 31 \ 5  Scan244
Letter to S.U. Co. regarding suggested modifications for a floatchamber on a Bentley carburetter.27th Oct 1938Box 31 \ 5  Scan245
Typed letter detailing improvements and omissions related to a petrol joint, drainage pipe, and float tickler.6th Nov 1934Box 31 \ 5  Scan246
Letter to The S.U. Co. Ltd. regarding a stripped thread on the carburetter float chamber stud, requesting a modification.6th Nov 1934Box 31 \ 5  Scan247
Letter to C.T. Skinner of The S.U. Co. Ltd. regarding a forwarded float chamber with a stripped stud boss.8th Nov 1934Box 31 \ 5  Scan248
Confirming promising bench test results for S.U. carburettors on Kestrel engines and arranging for design improvements.10th Nov 1934Box 31 \ 5  Scan249
Letter to a supplier complaining about the poor finish and cleanliness of supplied Bentley carburetter parts.12th Nov 1934Box 31 \ 5  Scan250
Letter from The S.U. Company regarding dirt and swarf found in their carburetters.13th Nov 1934Box 31 \ 5  Scan251
Letter to The S.U. Carburetter Co. requesting 6 needles with specific dimensions for a 3.5 litre Bentley car.13th Nov 1934Box 31 \ 5  Scan252
Letter from The S.U. Company regarding a returned float chamber and a necessary alteration.13th Nov 1934Box 31 \ 5  Scan253
Letter from The S.U. Company concerning the arrangement of special needles and a chart for the 'AW' needle.14th Nov 1934Box 31 \ 5  Scan254
Letter to The S.U. Company acknowledging receipt of needles but requesting a missing chart.16th Nov 1934Box 31 \ 5  Scan255
Letter from The S.U. Company regarding the safe arrival of needles and enclosing a further needle chart.17th Nov 1934Box 31 \ 5  Scan256
Data table of comparative dimensions for Rover, Bentley, M.G., and Lea-Francis components.19th Nov 1934Box 31 \ 5  Scan257
Letter acknowledging receipt of a letter and chart from The S.U. Company.19th Nov 1934Box 31 \ 5  Scan258
The dispatch of supercharger and carburetter parts to the S.U. Company for assembly.19th Nov 1934Box 31 \ 5  Scan259
Cover sheet for a chart of standard needles fitted to Bentley cars.19th Nov 1934Box 31 \ 5  Scan260
Bentley carburation issues and the testing of experimental needles to improve snap acceleration.19th Nov 1934Box 31 \ 5  Scan261
Letter from The S.U. Company thanking for the receipt of carburetter castings for the Kestrel engine.23th Nov 1934Box 31 \ 5  Scan262
Letter to S.U. Carburetter Co. requesting four experimental needles ('XB9') with specified dimensions.3rd Dec 1934Box 31 \ 5  Scan263
Letter to The S.U. Company Ltd. regarding the performance of their carburetter on a Kestrel engine.7th Dec 1934Box 31 \ 5  Scan264
Letter discussing carburettor performance regarding altitude correction and arranging a visit.7th Dec 1934Box 31 \ 5  Scan265
Points of criticism for the design and operation of the S.U. (Aero) carburetter.10th Dec 1934Box 31 \ 5  Scan266
List of issues and recommended modifications for an S.U. Carburetter.10th Dec 1934Box 31 \ 5  Scan267
List of design requirements and modifications for various engine components.10th Dec 1934Box 31 \ 5  Scan268
Page 3 of a report comparing the weight and durability of Dural versus steel nuts.10th Dec 1934Box 31 \ 5  Scan269
Letter from The S.U. Company confirming an appointment for a visit.10th Dec 1934Box 31 \ 5  Scan270
Outlining decisions from a meeting with the S.U. Co. regarding modifications to the experimental S.U. Aero Carburetter.12th Dec 1934Box 31 \ 5  Scan271
Design modifications and agreements for the S.U. Aero Carburetter.11th Dec 1934Box 31 \ 5  Scan272
List of modifications and considerations for carburettor components.11th Dec 1934Box 31 \ 5  Scan273
Notes on carburetter design issues including sandwich casting, aneroid locking, plugs and throttles.11th Dec 1934Box 31 \ 5  Scan274
Page of meeting notes detailing design agreements on carburettor and engine components.20th Dec 1934Box 31 \ 5  Scan275
The development work for the S.U. Automatic Carburetter for Aero Engines.20th Dec 1934Box 31 \ 5  Scan276
The S.U. Automatic Carburetter for aero engines, detailing its design, operation, and advantages.20th Dec 1934Box 31 \ 5  Scan277
Technical report on the development and operation of carburetter systems, including slow running and altitude compensation.20th Dec 1934Box 31 \ 5  Scan278
Investigation into carburetter mixture weakening, automatic correction, throttle characteristics, and potential modifications.20th Dec 1934Box 31 \ 5  Scan279
Conclusions on throttle system gland leaks and proposed carburettor flight tests on a 'Hart' aircraft for altitude needle calibration.20th Dec 1934Box 31 \ 5  Scan280
Sketch of an S.U. Aero Carburetter showing the position of jets at the throttle edge.21th Dec 1934Box 31 \ 5  Scan281
Graph showing the richening characteristic of the boost controlled aneroid on a Kestrel VI engine at 2200 RPM.21th Dec 1934Box 31 \ 5  Scan282
Blank page with a 'Print Room' stamp from Derby.21th Dec 1934Box 31 \ 5  Scan283
Graph showing fuel flow versus altitude for an S.U. carburetter with a fixed throttle.10th Dec 1934Box 31 \ 5  Scan284
Graph showing the throttle characteristics of an S.U. carburetter on a Kestrel VI engine at various altitudes.1st Mar 1934Box 31 \ 5  Scan285
Constant speed throttle curve graph comparing S.U. and Kestrel VI carburetters on a Kestrel VI engine.10th Dec 1934Box 31 \ 5  Scan286
Graph comparing the constant speed throttling curve of an S.U. carburettor with a Kestrel VI carburettor on a Kestrel VI engine.10th Dec 1934Box 31 \ 5  Scan287
Letter from The S.U. Company cancelling an appointment due to a family illness.31th Dec 1934Box 31 \ 5  Scan288
Troubles and improvement schemes for the 20/25 HP S.U. Carburetter.9th Jan 1935Box 31 \ 5  Scan289
Letter requesting the supply of two pairs of needles with specified dimensions.10th Jan 1935Box 31 \ 5  Scan290
Requesting the resumption of anti-corrosion treatment for S.U. fuel pump and carburettor parts due to recent corrosion issues.11th Jan 1935Box 31 \ 5  Scan291
Letter to The S.U. Company Ltd. regarding a petrol pump diaphragm and carburetter flooding issues on a Bentley.22th Jan 1935Box 31 \ 5  Scan292
Request to the S.U. Carburetter Co. for a pair of modified experimental needles (XC3) with specified dimensions.1st Feb 1935Box 31 \ 5  Scan293
Letter from The S.U. Company discussing the design and performance of float chambers and pumps.7th Feb 1935Box 31 \ 5  Scan294
Drawing for an improved Bentley carburetter float chamber from the S.U. Co.9th Feb 1935Box 31 \ 5  Scan295
Request to S.U. Carburetter Co. Ltd. for diaphragm assemblies and diaphragms made of German material.16th Feb 1935Box 31 \ 5  Scan296
Invoice from S.U.Co. for a pair of HV5 H.R. Type Carburetters for a Bentley.21th Feb 1935Box 31 \ 5  Scan297
Request to the S.U. Company Ltd. for different types of carburetter needles.21th Feb 1935Box 31 \ 5  Scan298
Letter from The S.U. Company acknowledging receipt of an order.22th Feb 1935Box 31 \ 5  Scan299
The address side of a postcard sent to the Experimental Department in Derby.23th Feb 1935Box 31 \ 5  Scan300
Order be placed for a pair of HV5 H.R. Type Carburetters for a Bentley.23th Feb 1935Box 31 \ 5  Scan301
Request to the S.U. Carburetter Co. Ltd. for 4 pairs of needles with specified dimensions.25th Feb 1935Box 31 \ 5  Scan302
Invoice from S.U.Co. for R.R. & R.R.X. Jet Needles and a request for a covering order.26th Feb 1935Box 31 \ 5  Scan303
Authorising payment for needles.27th Feb 1935Box 31 \ 5  Scan304
Letter to Mr Skinner of S.U. Co. providing feedback and suggestions on a proposed modified float-chamber blueprint.27th Feb 1935Box 31 \ 5  Scan305
Letter to Messrs. S.U. Co. detailing feedback on carburettor components.27th Feb 1935Box 31 \ 5  Scan306
Letter from The S.U. Company regarding an upcoming meeting and the design of pistons.11th Mar 1935Box 31 \ 5  Scan307
Letter to The S.U. Carburetter Co. Ltd. chasing up an order for special carburetters and requesting jets for a Bentley.13th Mar 1935Box 31 \ 5  Scan308
Letter to The S.U. Company Ltd. regarding issues with seatings and float chamber modifications.15th Mar 1935Box 31 \ 5  Scan309
Proposal to use a shouldered nut and lengthened screw for the S.U. carburetter throttle adjustment to improve accessibility.23th Mar 1935Box 31 \ 5  Scan310
Letter from The S.U. Company regarding a duplicated order of carburetter needles.25th Mar 1935Box 31 \ 5  Scan311
Letter to The S.U. Company Ltd. regarding a roughly cut carburetter needle seating causing issues.27th Mar 1935Box 31 \ 5  Scan312
Letter from The S.U. Company regarding the examination of a returned seating and the dispatch of requested spares.28th Mar 1935Box 31 \ 5  Scan313


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