| Description | Date | Identifier | |
| The transfer of an induction pipe, carburettors, and air silencer for a 3 1/2 litre unit. | 24th May 1935 | Box 85 \ 4 scan0124 | |
| Invoice for six No.139 Filters from The S.U. Company and a request for payment authorisation. | 3rd Jun 1935 | Box 85 \ 4 scan0125 | |
| Request to issue an official order for S.U.Co. filters for testing on a Bentley Carburetter. | 6th Jun 1935 | Box 85 \ 4 scan0126 | |
| The development and dimensional modifications for Bentley induction pipes for two specific applications. | 13th Jun 1935 | Box 85 \ 4 scan0127 | |
| Instruction to fit a standard thimble filter to all Bentley carburetter float chambers to prevent flooding. | 27th Jun 1935 | Box 85 \ 4 scan0128 | |
| Requesting a new design for an air intake bend for a Large Bore Bentley, to be cast in aluminium. | 16th Sep 1935 | Box 85 \ 4 scan0129 | |
| Layout and parts for the large bore Bentley induction system. | 18th Sep 1935 | Box 85 \ 4 scan0130 | |
| Modifications to an induction pipe for a 3.500 Bore Bentley. | 18th Sep 1935 | Box 85 \ 4 scan0131 | |
| Development of the induction system and carburettors for the 3.500 Bore Bentley. | 18th Sep 1935 | Box 85 \ 4 scan0132 | |
| Provisional specifications for intake system components for B-18 and B-19 engine units. | 18th Sep 1935 | Box 85 \ 4 scan0133 | |
| Improvements to the 3.500' Bore Bentley Induction System and its carburetters. | 20th Sep 1935 | Box 85 \ 4 scan0134 | |
| Urgent production request for induction pipes and intake bends for a Large Bore Bentley to gain road experience. | 24th Sep 1935 | Box 85 \ 4 scan0135 | |
| Request to modify a Bentley Induction Pipe from specification Hs.2080 to Hs.2188. | 10th Oct 1935 | Box 85 \ 4 scan0136 | |
| Query regarding the sizes for an L.B.2 needle for a Bentley 'G' Series chassis. | 15th Jan 1936 | Box 85 \ 4 scan0137 | |
| Confirmation of the final pipe dimensions for the Bentley Induction System. | 18th Oct 1935 | Box 85 \ 4 scan0138 | |
| Potential jamming issue with the float mechanism in larger S.U. carburettors for the Large Bore Bentley. | 21th Oct 1935 | Box 85 \ 4 scan0139 | |
| Instructing the production of three sets of large bore Bentley induction pipes and clarifying drawing number discrepancies. | 21th Oct 1935 | Box 85 \ 4 scan0140 | |
| Request to supply a complete set of large carburetters and induction pipes for test bed purposes. | 23th Oct 1935 | Box 85 \ 4 scan0141 | |
| New drawings and associated parts for the Large Bore Bentley Chassis. | 17th Oct 1935 | Box 85 \ 4 scan0142 | |
| Weight reduction exercise for Big Bore Bentley Air Silencers by changing material gauges. | 6th Nov 1935 | Box 85 \ 4 scan0143 | |
| Instruction to manufacture one more Big Bore Bentley air silencer, specifying the use of steel rivets instead of aluminium. | 11th Nov 1935 | Box 85 \ 4 scan0144 | |
| Modifications to air silencers for Big Bore Bentley and 20/25 HP models, detailing changes in materials. | 19th Nov 1935 | Box 85 \ 4 scan0145 | |
| Drawings for a carburetter air cleaner, silencer, ignition control, and water pump elbow for Large Bore Bentley and 25-HP engines. | 23th Nov 1935 | Box 85 \ 4 scan0146 | |
| The new L.O.P. for the carburetter on the Large Bore Bentley Chassis. | 26th Nov 1935 | Box 85 \ 4 scan0147 | |
| Test results for a Large Bore Bentley fitted with large carburettors, comparing different cylinder heads and needles. | 13th Dec 1935 | Box 85 \ 4 scan0148 | |
| Providing blueprints and drawings for a Large Bore Bentley air silencer. | 17th Dec 1935 | Box 85 \ 4 scan0149 | |
| The comparative performance tests of L.B.1 and L.B.2 needles on a B-56-BN Bentley. | 24th Dec 1935 | Box 85 \ 4 scan0150 | |
| Testing of L.B.1 and L.B.2 needles for the Big Bore Bentley. | 30th Dec 1935 | Box 85 \ 4 scan0151 | |
| Letter providing the dimensions for an L.B.2 carburettor needle for the Bentley 'G' series chassis. | 20th Jan 1936 | Box 85 \ 4 scan0152 | |
| Standardisation of parts for a lightened air silencer. | 15th Jun 1935 | Box 85 \ 4 scan0153 | |
| Cost estimation for extra jigs, tools, and equipment and the proposed production implementation. | 17th Sep 1935 | Box 85 \ 4 scan0154 | |
| Questioning the new throttle stop arrangement on Large Bore Bentley carburettors. | 7th Feb 1936 | Box 85 \ 4 scan0155 | |
| High cost of the Vokes Air Filter EB.2772 for the Bentley and seeking alternatives. | 28th Feb 1936 | Box 85 \ 4 scan0156 | |
| Request to detail and produce a modified induction pipe for a High Power Bentley. | 5th Mar 1936 | Box 85 \ 4 scan0157 | |
| Proposal outlining cost savings for the Bentley Air Silencer by substituting materials. | 27th Mar 1936 | Box 85 \ 4 scan0158 | |
| Confirming agreement on a scheme to reduce the cost of the Bentley air silencer. | 27th Mar 1936 | Box 85 \ 4 scan0159 | |
| Request to slow production of the current Bentley carburetter air silencer pending a modified design. | 30th Mar 1936 | Box 85 \ 4 scan0160 | |
| Providing sketches for a Bentley Air Silencer's metallic wool air filter element. | 30th Mar 1936 | Box 85 \ 4 scan0161 | |
| The cost reduction and production of a Bentley Air Silencer. | 30th Mar 1936 | Box 85 \ 4 scan0162 | |
| Negative results of tests on a Bentley using large carburetters and induction pipes. | 6th Apr 1936 | Box 85 \ 4 scan0163 | |
| Slow running engine vibration tests using different carburetter and induction pipe configurations. | 6th Apr 1936 | Box 85 \ 4 scan0164 | |
| Acceleration test results and conclusions for different carburetter and induction pipe configurations. | 6th Apr 1936 | Box 85 \ 4 scan0165 | |
| Performance test results for car models 6-B-IV and 3-B-IV at Brooklands. | 2nd Apr 1936 | Box 85 \ 4 scan0166 | |
| Comparison of engine performance traces under various ignition, RPM, pipe, and carburetter settings. | 17th Apr 1936 | Box 85 \ 4 scan0167 | |
| Replacement blueprint for the Bentley II Chassis carburetter air silencer assembly. | 17th Apr 1936 | Box 85 \ 4 scan0168 | |
| Details and drawings of an auxiliary carburetter system for improving the slow running of old Bentley cars. | 19th Aug 1936 | Box 85 \ 4 scan0169 | |
| Materials and design for filter elements used in air intake silencers. | 28th Aug 1936 | Box 85 \ 4 scan0170 | |
| Results of testing filter elements for air intake silencers in different fuels. | 31th Aug 1936 | Box 85 \ 4 scan0171 | |
| Modified air silencer filter element for the 25/30 and Bentley chassis, requesting a detailed drawing. | 21th Sep 1936 | Box 85 \ 4 scan0172 | |
| Standardisation of an air silencer by changing from aluminium to steel to reduce cost. | 16th Nov 1936 | Box 85 \ 4 scan0173 | |
| Cost estimate and production feasibility note for jigs and equipment for the 'K' series chassis. | 14th Oct 1936 | Box 85 \ 4 scan0174 | |
| Blueprint showing the design for a supercharger and induction pipes for a large bore Bentley. | 10th Feb 1937 | Box 85 \ 4 scan0175 | |
| Suggestion to simplify the carburetter throttle coupling on the 4¼ Litre Bentley chassis. | 10th Feb 1937 | Box 85 \ 4 scan0176 | |
| The performance gains from fitting six Amal carburetters to 3.5 and 4.25 litre Bentley engines. | 6th Aug 1937 | Box 85 \ 4 scan0177 | |
| Engine modifications testing different carburettor setups and a T.T. cylinder head, noting effects on airflow and power. | 6th Aug 1937 | Box 85 \ 4 scan0178 | |
| Analysis of the effects of carburettor size and enlarged inlet valve ports on engine power and torque. | 6th Aug 1937 | Box 85 \ 4 scan0179 | |
| List of conclusions regarding engine induction system losses and efficiency. | 6th Aug 1937 | Box 85 \ 4 scan0180 | |
| Impracticality of gaining power by freezing the induction system. | 1st Dec 1937 | Box 85 \ 4 scan0181 | |
| Performance graph comparing two different carburetter systems for a 3½ Litre Bentley engine, unit B.7. | 1st Dec 1937 | Box 85 \ 4 scan0182 | |
| Performance graph comparing two carburettor systems on a 4 1/4 Litre Bentley B14 engine. | 1st Apr 1937 | Box 85 \ 4 scan0183 | |
| Performance graph comparing three different carburettor systems on a 4¼ Litre Bentley engine, unit B14. | 1st Oct 1937 | Box 85 \ 4 scan0184 | |
| Petrol leaks from the float chamber lid of a Bentley S.U. carburetter due to a machining fault. | 11th May 1937 | Box 85 \ 4 scan0185 | |
| Service complaints about Bentley throttle control sticking. | 22th May 1937 | Box 85 \ 4 scan0186 | |
| Complaints about Bentley S.U. carburetter float chamber covers being too thin. | 22th May 1937 | Box 85 \ 4 scan0187 | |
| Service complaint memo about sticking throttle controls on Bentley carburettors and a proposed solution. | 22th May 1937 | Box 85 \ 4 scan0188 | |
| Replacement throttle control parts for the Bentley Chassis, specifically a bracket and spring. | 28th Oct 1937 | Box 85 \ 4 scan0189 | |
| Sticking throttle issues in Bentley cars and a proposed spring-based solution. | 13th Dec 1937 | Box 85 \ 4 scan0190 | |
| Response regarding complaints of a sticking throttle spring on a Bentley II chassis, suggesting modifications. | 22th Apr 1938 | Box 85 \ 4 scan0191 | |
| Confirmation to produce a drawing for an experimental cast aluminium intake bend for a 4¼-litre Bentley. | 3rd Aug 1938 | Box 85 \ 4 scan0192 | |
| Requesting tests be conducted on an outside air intake for a Bentley, with instructions for carburetor adjustment. | 8th Aug 1938 | Box 85 \ 4 scan0193 | |
| Parts list for a Bentley 11 Air Silencer modification to suit larger carburetters. | 24th Aug 1938 | Box 85 \ 4 scan0194 | |
| Performance comparison experiments for a Bentley II with a standard air intake versus an external air intake, including acceleration test results. | 29th Aug 1938 | Box 85 \ 4 scan0195 | |
| Report comparing standard and external air intakes, detailing temperature readings and performance conclusions. | 29th Aug 1938 | Box 85 \ 4 scan0196 | |
| Slow running adjustment method for 4 1/4 Litre Bentley carburetter throttles. | 4th Mar 1939 | Box 85 \ 4 scan0197 | |
| Inquiry regarding instances of throttle sticking after fitting a lower stressed throttle spring, piece No. EB.3429. | 31th Mar 1939 | Box 85 \ 4 scan0198 | |
| Slow running adjustment for the 4 1/4-Litre Bentley, specifically concerning the throttle stops and return spring. | 29th Mar 1939 | Box 85 \ 4 scan0199 | |
| Technical memorandum discussing the crankshaft, damper, and critical frequency calculations for the Bensport engine. | 16th Jan 1932 | Box 85 \ 5 scan0001 | |
| Suitability of a Peregrine crankshaft for a supercharged engine, comparing it to an Alfa Romeo design. | 24th Mar 1932 | Box 85 \ 5 scan0002 | |
| Proposed modifications to the Bensport Engine's crankshaft to increase speed. | 15th Apr 1932 | Box 85 \ 5 scan0003 | |
| Engine shaft calculations, Peregrine critical speed, and proposed improvements. | 15th Apr 1932 | Box 85 \ 5 scan0004 | |
| Design considerations for the Bensport Crankshaft and supercharger. | 19th Apr 1932 | Box 85 \ 5 scan0005 | |
| Potential requirement and cost of using nitro-hardened crankshafts on the Bensport model. | 23th Apr 1932 | Box 85 \ 5 scan0006 | |
| Comparative analysis of the stiffness of Peregrine and Bensport crankshafts. | 27th Apr 1932 | Box 85 \ 5 scan0007 | |
| The stiffness and natural frequency of a supercharger drive. | 26th May 1932 | Box 85 \ 5 scan0008 | |
| Fitting of a Bensport crankshaft with larger diameter journals similar to the Peregrine engine. | 26th May 1932 | Box 85 \ 5 scan0009 | |
| Blueprint showing the dimensions of a centre main bearing for a Bensport crankshaft in a Peregrine crankcase. | 20th May 1940 | Box 85 \ 5 scan0010 | |
| The Bensport crankshaft, its balance weight studs, and testing on a Peregrine engine. | 27th May 1932 | Box 85 \ 5 scan0011 | |
| Failure of a Peregrine crankshaft during testing and proposals for new dimensions. | 21th Jun 1932 | Box 85 \ 5 scan0012 | |
| Comparison table of calculated stiffness, inertia, and critical speed for various engine components. | 22th Jun 1932 | Box 85 \ 5 scan0013 | |
| 'Bensport' engine's crankshaft limitations for racing applications. | 22th Jun 1932 | Box 85 \ 5 scan0014 | |
| Reduction of crankshaft stroke for the Reisport engine to raise its critical speed. | 29th Aug 1923 | Box 85 \ 5 scan0015 | |
| Data table comparing engine crankshaft stiffness, inertia, and critical speeds for various configurations. | 6th Jul 1932 | Box 85 \ 5 scan0016 | |
| Amended list of critical speeds for the Bensport crankshaft. | 6th Jul 1932 | Box 85 \ 5 scan0017 | |
| Table comparing engine characteristics such as Stiffness, Inertia, and Critical Speed across different configurations. | 15th Aug 1932 | Box 85 \ 5 scan0018 | |
| Blueprint for the Bensport Crankshaft. | 15th Aug 1932 | Box 85 \ 5 scan0019 | |
| Design issues with the J.I. crankshaft and proposing improvements for the Bensport model. | 29th Nov 1932 | Box 85 \ 5 scan0020 | |
| The design of the Bensport J.1. crankshaft, referencing drawing LeC.3284. | 1st Dec 1932 | Box 85 \ 5 scan0021 | |
| Necessity of using studs instead of bolts for main bearings on the Bensport engine, affecting the 20/25 model. | 21th Dec 1932 | Box 85 \ 5 scan0022 | |
| Drawing LeC.3324 for the Bensport J.1, detailing changes to the crankcase, starter motor, and main bearing caps. | 23th Dec 1932 | Box 85 \ 5 scan0023 | |
| Suggestion to test a modification for increasing oil holes in chassis crankshaft journals. | 9th Feb 1933 | Box 85 \ 5 scan0024 | |
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