| Description | Date | Identifier | |
| Blueprint for a Bentley carburetter part from the S.U. Company. | 29th Apr 1933 | Box 85 \ 4 scan0024 | |
| Bentley carburation, requesting a test of moving the intake silencer to improve consumption. | 3rd May 1933 | Box 85 \ 4 scan0025 | |
| Modification to the Bensport ignition wiring, requiring buffer ends on the induction pipes. | 5th May 1933 | Box 85 \ 4 scan0026 | |
| Test results for various configurations of a Bentley Air Silencer. | 15th May 1933 | Box 85 \ 4 scan0027 | |
| Instruction to incorporate modification V.1567 into drawing EB.355 for an air intake bend. | 19th May 1933 | Box 85 \ 4 scan0028 | |
| Design and testing of a new, larger Bentley air silencer. | 24th May 1933 | Box 85 \ 4 scan0029 | |
| Blueprint showing the design and dimensions for an experimental air intake, modified from E.B. 355. | 19th May 1933 | Box 85 \ 4 scan0030 | |
| Test results and instructions for a new venturi-type centre piece for the Bentley induction system. | 24th May 1933 | Box 85 \ 4 scan0031 | |
| Blueprint of a Balance Restriction component for a Bentley. | 24th May 1933 | Box 85 \ 4 scan0032 | |
| Performance graph plotting B.H.P and B.M.E.P against R.P.M., with engine specifications and a timing diagram. | 23th May 1933 | Box 85 \ 4 scan0033 | |
| Fitting a venturi centre piece to the Bentley Induction System. | 25th May 1933 | Box 85 \ 4 scan0034 | |
| Increase in length of a Bentley Air Intake Silencer. | 27th May 1933 | Box 85 \ 4 scan0035 | |
| From G.H. Whyman instructing RHC to make four air silencers for Bentley cars. | 29th May 1933 | Box 85 \ 4 scan0036 | |
| Chasing a decision on the finish for Bentley carburettors and associated parts. | 14th Jun 1933 | Box 85 \ 4 scan0037 | |
| Scratch brush finish for the induction system and air silencer of a Bentley destined for France. | 14th Jun 1933 | Box 85 \ 4 scan0038 | |
| Alternative finishes for a Bentley engine and requesting a decision. | 16th Jun 1933 | Box 85 \ 4 scan0039 | |
| Note discussing a failure in the riveting of supporting brackets for air silencers and requesting a design review. | 21th Aug 1933 | Box 85 \ 4 scan0040 | |
| Standardisation of parts document for a modified water pipe to carburetter water jackets. | 10th Nov 1933 | Box 85 \ 4 scan0041 | |
| Scheme to modify the petrol system on a Bentley car to reduce piping and unions. | 2nd Dec 1933 | Box 85 \ 4 scan0042 | |
| Requesting the production of a modified induction pipe and brass blanks for the Bentley Induction System on the Spectre engine. | 4th Jan 1934 | Box 85 \ 4 scan0043 | |
| Effects of reducing the Bentley Induction Pipe diameter and requesting a mock-up. | 4th Jan 1934 | Box 85 \ 4 scan0044 | |
| Instructions for building a Semi-Expanding Carburetter with specific modifications. | 25th Jan 1934 | Box 85 \ 4 scan0045 | |
| Step-by-step procedure for changing and fitting the Float Chamber Dain pipes to a Bentley. | 30th May 1934 | Box 85 \ 4 scan0046 | |
| Requesting the creation of spring-loaded mixture controls for Bentley carburetters to fix an issue with jets. | 22th Jun 1934 | Box 85 \ 4 scan0047 | |
| Schematic for a Mixture Control component for a Bentley. | 31th May 1934 | Box 85 \ 4 scan0048 | |
| Standardisation of parts for modified float chambers, drain pipes, and plug terminals to prevent petrol spraying and flooding. | 31th May 1934 | Box 85 \ 4 scan0049 | |
| Estimated cost for extra jigs, tools, and equipment for a modification to be fitted on all cars. | 14th Jun 1934 | Box 85 \ 4 scan0050 | |
| Letter to the Packless Gland Co. regarding the design and supply of parts for a carburettor, water pump, and thermostat. | 26th Jun 1934 | Box 85 \ 4 scan0051 | |
| Letter from The Packless Gland Co. Ltd. regarding a carburetter mixture control, a packless gland for a water pump, and a by-pass thermostat. | 27th Jun 1934 | Box 85 \ 4 scan0052 | |
| Testing of new, less expensive flexible petrol pipes from Benton and Stone. | 19th Jul 1934 | Box 85 \ 4 scan0053 | |
| Comparing pricing and considering alternative suppliers for Petroflex pipes. | 25th Jul 1934 | Box 85 \ 4 scan0054 | |
| Purchase and testing of Petroflex flexible petrol pipes from various manufacturers. | 26th Jul 1934 | Box 85 \ 4 scan0055 | |
| Letter despatching carburetter mixture control parts for a Bentley and requesting information on by-pass thermostats. | 26th Jul 1934 | Box 85 \ 4 scan0056 | |
| Requesting the dispatch of parts to the Packless Gland Co. for completion and testing. | 26th Jul 1934 | Box 85 \ 4 scan0057 | |
| Letter from The Packless Gland Co. Ltd. regarding carburetter mixture controls and by-pass thermostats. | 27th Jul 1934 | Box 85 \ 4 scan0058 | |
| Letter from The Packless Gland Co. Ltd. discussing thermostat design, its perceived shortcomings, and potential improvements. | 5th Jul 1934 | Box 85 \ 4 scan0059 | |
| General arrangement drawing of a thermostat assembly. | 5th Jul 1934 | Box 85 \ 4 scan0060 | |
| Arrangement of a thermostat mounting. | 1st Sep 1934 | Box 85 \ 4 scan0061 | |
| Letter from The Packless Gland Co. Ltd. to Rolls-Royce regarding carburettor mixture control. | 28th Aug 1934 | Box 85 \ 4 scan0062 | |
| Letter to The Packless Gland Co., Ltd. regarding carburetter mixture control performance. | 1st Sep 1934 | Box 85 \ 4 scan0063 | |
| Letter to The Packless Gland Co. Ltd. requesting a progress update on carburetter mixture controls for a Bentley engine. | 20th Sep 1934 | Box 85 \ 4 scan0064 | |
| Letter to Gabriel Manufacturing Co. inquiring about the leakage-proof design of their sample petrol flexes. | 21th Sep 1934 | Box 85 \ 4 scan0065 | |
| Letter from Gabriel Manufacturing Co. describing the manufacturing and testing process of Titeflex Petrol Pipes. | 24th Sep 1934 | Box 85 \ 4 scan0066 | |
| The second page of a letter from Gabrile Manufacturing Co. about a product demonstration. | 24th Sep 1934 | Box 85 \ 4 scan0067 | |
| Promotional leaflet for Titeflex all-metal flexible hose and tubing. | 24th Sep 1934 | Box 85 \ 4 scan0068 | |
| Instructions for applying and soldering couplings to Titeflex metal hose, including size and specification tables. | 24th Sep 1934 | Box 85 \ 4 scan0069 | |
| Product catalog page for Tite Flex flexible metal hose and adapters, detailing their construction, application, and specifications. | 24th Sep 1934 | Box 85 \ 4 scan0070 | |
| Brochure detailing the construction, features, and applications of Tite Flex all-metal hose. | 24th Sep 1934 | Box 85 \ 4 scan0071 | |
| Technical leaflet describing the construction, properties, and applications of Tite Flex all-metal hoses. | 24th Sep 1934 | Box 85 \ 4 scan0072 | |
| Informational leaflet on the features, construction, and application of Tite flex all metal hose. | 24th Sep 1934 | Box 85 \ 4 scan0073 | |
| Product information sheet for Tite flex all-metal hoses, detailing applications, features, and ordering instructions. | 24th Sep 1934 | Box 85 \ 4 scan0074 | |
| Promotional document for Tite Flex all-metal hose, detailing its features and applications. | 24th Sep 1934 | Box 85 \ 4 scan0075 | |
| Letter from The Packless Gland Co. Ltd. regarding a delay in delivering Thermostatic Mixture Controls for the Bentley. | 24th Sep 1934 | Box 85 \ 4 scan0076 | |
| Letter to The Packless Gland Co. Ltd. regarding the despatch of carburetter mixture controls. | 25th Sep 1934 | Box 85 \ 4 scan0077 | |
| Engine breakdown on Bentley Chassis B-1-AE and the proposed modification to the air cleaner support bracket. | 3rd Oct 1934 | Box 85 \ 4 scan0078 | |
| Failure of a stiffening strip on Bentley carburetter air silencers and outlining the required modifications. | 4th Oct 1934 | Box 85 \ 4 scan0079 | |
| Letter from The British Thermostat Co., Ltd. regarding a delay in dispatching a Thermostat for the Bentley Mixture Control. | 6th Oct 1934 | Box 85 \ 4 scan0080 | |
| Internal request to order a flexible petrol pipe for a Bentley for test purposes. | 8th Oct 1934 | Box 85 \ 4 scan0081 | |
| Letter from The Packless Gland Co. Ltd. concerning a Bentley Mixture Controls unit. | 9th Oct 1934 | Box 85 \ 4 scan0082 | |
| Page 2 of a letter regarding the testing of a bellows unit and suggesting a different material due to difficulties soldering stainless steel. | 9th Oct 1934 | Box 85 \ 4 scan0083 | |
| 5 HP loss at high speeds due to the Bentley Air Silencer and proposing modifications to the downtake pipe. | 9th Oct 1934 | Box 85 \ 4 scan0084 | |
| Occasional flooding troubles experienced with the Bentley carburetter, focusing on the float mechanism. | 10th Oct 1934 | Box 85 \ 4 scan0085 | |
| Blueprint of a float chamber, type 2T/RR. | 11th Oct 1934 | Box 85 \ 4 scan0086 | |
| Letter to The Packless Gland Co. Ltd. regarding an Automatic Mixture Control unit and the material of its bellows plate. | 11th Oct 1934 | Box 85 \ 4 scan0087 | |
| 'flat spot' in Bentley low-speed acceleration and the solution of fitting a smaller diameter induction pipe. | 12th Oct 1934 | Box 85 \ 4 scan0088 | |
| Comparative performance tests of different diameter induction pipes on Bentley cars. | 8th Oct 1934 | Box 85 \ 4 scan0089 | |
| Performance comparison table for vehicles B-23-AE and 3-B-IV, testing different pipe and carburetor configurations. | 24th Oct 1934 | Box 85 \ 4 scan0090 | |
| Customer complaints about the slow running of Bentley engines and carburetter adjustments. | 24th Oct 1934 | Box 85 \ 4 scan0091 | |
| Letter discussing a customer complaint and seeking advice on how to communicate with customers. | 24th Oct 1934 | Box 85 \ 4 scan0092 | |
| Report of a test carried out on a Bentley Small Bore Induction Pipe to EX.14528. | 24th Oct 1934 | Box 85 \ 4 scan0093 | |
| Technical memorandum replying to queries about Bentley carburettors and comparing their performance to Rolls-Royce systems. | 27th Oct 1934 | Box 85 \ 4 scan0094 | |
| The compromise between engine idle speed and high-speed performance, particularly concerning the Bentley model. | 27th Oct 1934 | Box 85 \ 4 scan0095 | |
| Power loss experiments conducted on a Bentley engine. | 29th Oct 1934 | Box 85 \ 4 scan0096 | |
| Page 2 of a report detailing engine performance tests on air silencers and induction pipes. | 29th Oct 1934 | Box 85 \ 4 scan0097 | |
| Comparison of standard and 'R' type cam followers, detailing their effect on valve timing, power, and Mean Effective Pressure. | 7th Sep 1934 | Box 85 \ 4 scan0098 | |
| Standardisation of parts report for a Titeflex all-metal flexible tube. | 7th Sep 1934 | Box 85 \ 4 scan0099 | |
| Standardisation of parts document noting an externally sourced piece with no tool cost. | 22th Oct 1934 | Box 85 \ 4 scan0100 | |
| Leakage tests for 'Titeflex' petrol piping after a 10,000-mile standardisation. | 16th Nov 1934 | Box 85 \ 4 scan0101 | |
| Issues with snap acceleration on Bentley cars and the testing of different carburettor needles to improve performance. | 19th Nov 1934 | Box 85 \ 4 scan0102 | |
| Letter to The Packless Gland Co. Ltd. inquiring about the status of automatic mixture controls for a Bentley engine. | 14th Dec 1934 | Box 85 \ 4 scan0103 | |
| Letter to The Packless Gland, Co.Ltd., requesting an update on the construction of two Bentley mixture controls. | 4th Jan 1934 | Box 85 \ 4 scan0104 | |
| Letter from The Packless Gland Co., Ltd. regarding the supply and testing of an Automatic Mixture Control unit. | 5th Jan 1935 | Box 85 \ 4 scan0105 | |
| Letter to The Packless Gland Co. Ltd. regarding a faulty Automatic Mixture Control unit and a request for a replacement. | 14th Jan 1935 | Box 85 \ 4 scan0106 | |
| Instructing the dispatch of a Bentley automatic mixture control to The Packless Gland Co. Ltd. | 14th Jan 1935 | Box 85 \ 4 scan0107 | |
| Letter from carburetter manufacturer AMAL regarding available down-draught carburetter sizes. | 14th Jan 1935 | Box 85 \ 4 scan0108 | |
| Correspondence to The Packless Gland Co. Ltd. regarding the failure of a capillary tube and agreement to remake a bottom plate in brass. | 16th Jan 1935 | Box 85 \ 4 scan0109 | |
| Letter from R.A.G. Limited regarding the supply and pricing of carburettors. | 16th Jan 1935 | Box 85 \ 4 scan0110 | |
| Letter from R.A.G. Limited offering carburetter samples for testing. | 16th Jan 1935 | Box 85 \ 4 scan0111 | |
| Letter to The Packless Gland Co. Ltd. chasing the return of two Bentley automatic mixture controls. | 2nd Feb 1935 | Box 85 \ 4 scan0112 | |
| Request to produce a modified induction pipe for a Bentley Competition vehicle. | 12th Feb 1935 | Box 85 \ 4 scan0113 | |
| Request for two jets and jet guides to be made for Bentley Automatic Mixture Controls. | 26th Feb 1935 | Box 85 \ 4 scan0114 | |
| Request to manufacture an induction pipe for downdraught carburetter tests on a Bentley engine. | 2nd Mar 1935 | Box 85 \ 4 scan0115 | |
| Report comparing a standard induction system with a larger one, detailing their performance characteristics. | 8th Mar 1935 | Box 85 \ 4 scan0116 | |
| Performance graph comparing three different induction system setups on a B.2 Unit. | 30th Jan 1935 | Box 85 \ 4 scan0117 | |
| Graph comparing induction pipe depression against RPM for three different induction system configurations. | 30th Jan 1935 | Box 85 \ 4 scan0118 | |
| Instruction to alter the pattern for an experimental Bentley induction pipe for Spectre development. | 10th Apr 1935 | Box 85 \ 4 scan0119 | |
| Invoice from Thos. Crump & Co. Ltd. for special gauge glasses and glass bends. | 8th May 1935 | Box 85 \ 4 scan0120 | |
| Requesting information on the location of an improved Bentley S.U. Floatchamber model. | 9th May 1935 | Box 85 \ 4 scan0121 | |
| Requesting an order be passed to Messrs. Thos. Crump & Co.Ltd. for Special Gauge Glasses. | 13th May 1935 | Box 85 \ 4 scan0122 | |
| Instruction to modify new S.U. carburetter float chambers to the standard 20/25 HP specification. | 14th May 1935 | Box 85 \ 4 scan0123 | |
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