| Description | Date | Identifier | |
| Photograph and the design of a vertical silencer for a semi-expanding carburetter. | 19th Dec 1932 | Box 13 \ 4 04-page081 | |
| Photograph of an installed inline-six engine, showing the carburettor, air intake, and distributor. | 23th Dec 1932 | Box 13 \ 4 04-page082 | |
| Excessive suction noise from a new type of carburetter for the Phantom II 'O' Series. | 23th Dec 1932 | Box 13 \ 4 04-page083 | |
| Increased suction noise of a new carburetter for the Phantom II 'O' Series. | 28th Dec 1932 | Box 13 \ 4 04-page084 | |
| Requesting an experiment on a semi-expanding carburetter to resolve a weakening off issue. | 31th Dec 1932 | Box 13 \ 4 04-page085 | |
| Additional feature for Semi-Expanding Carburetters on J.2 and Phantom II models. | 3rd Jan 1933 | Box 13 \ 4 04-page086 | |
| Modifications to resolve hesitation issues on Phantom II carburetters. | 6th Jan 1933 | Box 13 \ 4 04-page087 | |
| Test results for a Semi-Expanding Carburetter P.II, detailing efforts to prevent air leaks and balance float chamber depression. | 9th Jan 1933 | Box 13 \ 4 04-page088 | |
| Recommendation for assembling a control spindle to prevent leaks in the float chamber. | 9th Jan 1933 | Box 13 \ 4 04-page089 | |
| Request to produce a further set of parts for the large air valve of a 40/50 carburetter. | 12th Jan 1933 | Box 13 \ 4 04-page090 | |
| The re-issue of a document on semi-expanding carburettors and refinements to increase jet spring pressure. | 14th Jan 1933 | Box 13 \ 4 04-page091 | |
| Redesigned throttle edge adjustment for semi-expanding carburetters on Phantom II and J.2 models. | 16th Jan 1933 | Box 13 \ 4 04-page092 | |
| Design of a resonance air silencer for the Phantom II Semi-Expanding Carburetter. | 21th Jan 1933 | Box 13 \ 4 04-page093 | |
| Requesting two larger air valve Phantom II carburetters with modifications. | 25th Jan 1933 | Box 13 \ 4 04-page094 | |
| Tester's report on rectifying a 'luffing up' issue with a Phantom II semi-expanding carburettor. | 31th Jan 1933 | Box 13 \ 4 04-page095 | |
| And recommending modifications to a standard carburetter. | 31th Jan 1933 | Box 13 \ 4 04-page096 | |
| Blueprint showing a modification to a diffuser component. | 1st Feb 1933 | Box 13 \ 4 04-page097 | |
| Starting carburetter controls and extra cylinder lubrication for the Phantom II. | 2nd Feb 1933 | Box 13 \ 4 04-page098 | |
| Test report on the Large Phantom II Semi Expanding Carburetter, detailing modifications and performance. | 6th Feb 1933 | Box 13 \ 4 04-page099 | |
| Resolving excessive fuel consumption by modifying the carburetter's stand pipe and float chamber. | 6th Feb 1933 | Box 13 \ 4 04-page100 | |
| Carburetter modifications, alterations, and subsequent performance during slow running and road tests. | 6th Feb 1933 | Box 13 \ 4 04-page101 | |
| Resolving a 'luffing up' issue in a carburetter caused by a low diffuser level and proposed modifications. | 6th Feb 1933 | Box 13 \ 4 04-page102 | |
| Blueprint for a PII carburettor needle, showing taper diameters. | 7th Feb 1933 | Box 13 \ 4 04-page103 | |
| Blueprint detailing a modification to a float chamber vent position. | 7th Feb 1933 | Box 13 \ 4 04-page104 | |
| Performance graph showing Power Output, BMEP, and RPM for a Phantom II engine with an open exhaust. | 7th Feb 1935 | Box 13 \ 4 04-page105 | |
| Standardisation of a Semi-Expanding Carburetter to increase engine efficiency. | 6th Sep 1932 | Box 13 \ 4 04-page106 | |
| Standardisation form for a new chassis part to be fitted to the 'J' Series Continental Chassis. | 19th Nov 1932 | Box 13 \ 4 04-page107 | |
| Proposed modifications to the Large Phantom II Semi-Expanding Carburetter. | 16th Feb 1933 | Box 13 \ 4 04-page108 | |
| Test report on a Phantom II 'O' Series Continental Model with a semi-expanding carburettor. | 20th Feb 1933 | Box 13 \ 4 04-page109 | |
| Inquiring about the experimental fitting of carburettor air silencers to 20/25 and Phantom II chassis. | 24th Feb 1933 | Box 13 \ 4 04-page110 | |
| Query regarding the experimental fitting of carburetter air silencers to a 20/25 and a Phantom II chassis. | 24th Feb 1933 | Box 13 \ 4 04-page111 | |
| Fitting carburetter air silencers to specific chassis. | 27th Feb 1933 | Box 13 \ 4 04-page112 | |
| Experiments to locate a restriction point in Phantom II large air valve carburettors. | 28th Feb 1933 | Box 13 \ 4 04-page113 | |
| The fitting of carburetter air silencers. | 27th Feb 1933 | Box 13 \ 4 04-page114 | |
| Test report on a semi-expanding carburetter, detailing modifications to the throttle bore and their effect on induction pipe depression. | 28th Feb 1933 | Box 13 \ 4 04-page115 | |
| Test data sheet showing induction pipe depression and necessary piston lift under various engine configurations at 3000 rpm. | 28th Feb 1933 | Box 13 \ 4 04-page116 | |
| The performance gain from a semi-expanding carburetter on the Phantom II. | 4th May 1933 | Box 13 \ 4 04-page117 | |
| Performance graph comparing the power output of a Phantom II engine with a standard versus a larger expanding carburettor. | 3rd Mar 1933 | Box 13 \ 4 04-page118 | |
| Performance of a semi-expanding carburetter silencer during London Trials on car 20-MY. | 6th Mar 1933 | Box 13 \ 4 04-page119 | |
| Fitting of an air silencer to the 40/50 semi-expanding carburetter. | 7th Mar 1933 | Box 13 \ 4 04-page120 | |
| List of modifications for the large Phantom II carburetter. | 9th Mar 1933 | Box 13 \ 4 04-page121 | |
| Request to manufacture six throttle spindle bushes in BZ/PC for a Phantom II carburetter due to issues with the original Duralumin material. | 14th Mar 1933 | Box 13 \ 4 04-page122 | |
| Urgent inquiry about the development and fitting history of a new air silencer for car models 19-EX and 58-GN. | 14th Mar 1933 | Box 13 \ 4 04-page123 | |
| Tests on a semi-expanding carburettor and a resonance-type air silencer for cars 19-EX and 58-GN. | 15th Mar 1933 | Box 13 \ 4 04-page124 | |
| Throttle sticking issues and potential solutions for the Phantom II Semi Expanding Carburetter. | 15th Mar 1933 | Box 13 \ 4 04-page125 | |
| Confusion over the introduction schedule of new air silencers for Phantom II cars. | 15th Mar 1933 | Box 13 \ 4 04-page126 | |
| Mistake and revised plan for introducing an air silencer to the O2 series chassis. | 15th Mar 1933 | Box 13 \ 4 04-page127 | |
| The delays in introducing an air silencer for the Phantom II Cars. | 17th Mar 1933 | Box 13 \ 4 04-page128 | |
| Cutaway diagram illustrating depression tests on a Semi-Expanding Carburettor Phase II. | 20th Mar 1933 | Box 13 \ 4 04-page129 | |
| Production of new silencers and their impact on existing Phantom 0.2 models and induction pipes. | 16th Mar 1933 | Box 13 \ 4 04-page130 | |
| Modified spring and attachment for the Phantom II throttle valve. | 17th Mar 1933 | Box 13 \ 4 04-page131 | |
| Carburetter silencer noise and steering concerns on the Phantom II Continental cars. | 18th Mar 1933 | Box 13 \ 4 04-page132 | |
| Proposing modifications to the semi-expanding carburetter before production. | 21th Mar 1933 | Box 13 \ 4 04-page133 | |
| Test report on modifications to a Large Phantom II expanding carburetter to reduce induction pipe depression. | 20th Mar 1933 | Box 13 \ 4 04-page134 | |
| Carburetter modifications, airflow, and induction pipe depression tests. | 20th Mar 1933 | Box 13 \ 4 04-page135 | |
| Blueprint for the proposed layout of an expanding carburettor's intake flange and air ports. | 20th Jan 1938 | Box 13 \ 4 04-page136 | |
| Two new designs of copper gauze air cleaners for the 20-HP and Phantom II models. | 28th Mar 1933 | Box 13 \ 4 04-page137 | |
| Reasons for a modification to the throttle spring for the Phantom II. | 29th Mar 1933 | Box 13 \ 4 04-page138 | |
| Explaining the reasoning for a modified throttle spring design for the Phantom II. | 29th Mar 1933 | Box 13 \ 4 04-page139 | |
| Series of tests to resolve excessive oil consumption on 25 HP & Phantom II cars after fitting new air silencers. | 30th Mar 1933 | Box 13 \ 4 04-page140 | |
| Instructions to address oil consumption on Phantom II cars by fitting a new pipe and resolving an oil breather issue. | 30th Mar 1933 | Box 13 \ 4 04-page141 | |
| Modification to the breather connection on a Phantom II crankcase. | 30th Mar 1933 | Box 13 \ 4 04-page142 | |
| Test report on depressions in the latest type Phantom Air Silencer. | 11th Apr 1933 | Box 13 \ 4 04-page143 | |
| Requesting updates to the Peregrine and J.III carburetter drawings to incorporate improvements and fix an air lock fault. | 10th Apr 1933 | Box 13 \ 4 04-page144 | |
| Instruction to include modification (V.1541) into the existing carburetter body (E.83047) for the Phantom II expanding carburetter. | 10th Apr 1933 | Box 13 \ 4 04-page145 | |
| Sketch showing the position for a 1' spring lever on the Phantom II throttle. | 26th Apr 1933 | Box 13 \ 4 04-page146 | |
| Analysis of throttle spring direction and its effect on bearing loads and throttle spindle wear. | 29th Apr 1933 | Box 13 \ 4 04-page147 | |
| Carburetter disposition and a recommendation to increase the spring load for production part Lec.3412. | 29th Apr 1933 | Box 13 \ 4 04-page148 | |
| Tests conducted on the Phantom II throttle spring. | 29th Apr 1933 | Box 13 \ 4 04-page149 | |
| Test results and calculations for a throttle mechanism, comparing torque and load under different schemes. | 29th Apr 1933 | Box 13 \ 4 04-page150 | |
| Calculations for bearing loads and spring torque on a mechanical component under different force conditions. | 2nd May 1933 | Box 13 \ 4 04-page151 | |
| Design of a 2 3/8' semi-expanding carburetter for the 8 litre Phantom II. | 2nd May 1933 | Box 13 \ 4 04-page152 | |
| Standardisation of a carburetter air silencer for a 40/50 model to reduce noise. | 3rd Feb 1933 | Box 13 \ 4 04-page153 | |
| Costs and implementation schedule for a new part on the 'P' Series chassis. | 8th Jul 1933 | Box 13 \ 4 04-page154 | |
| Standardisation sheet for the deletion of the governor throttle control on the carburettor. | 22th Apr 1933 | Box 13 \ 4 04-page155 | |
| Tests and modifications to a Phantom II throttle spring arrangement to resolve sluggish movement. | 9th May 1933 | Box 13 \ 4 04-page156 | |
| Spring lengths and loads for a throttle and accelerator pedal assembly, part L.E.C.3412. | 9th May 1933 | Box 13 \ 4 04-page157 | |
| Request to the No.1 Erecting Shop to loan a complete petrol supply system for a Phantom II to the Experimental Department. | 17th May 1933 | Box 13 \ 4 04-page158 | |
| Request to manufacture an adjustable air silencer for an 8 litre Phantom for experimental tests. | 20th May 1933 | Box 13 \ 4 04-page159 | |
| The inadequacy of the petrol supply for the 8-litre engine. | 20th May 1933 | Box 13 \ 4 04-page160 | |
| Provisional specification document concerning resonance air silencers. | 8th Jun 1933 | Box 13 \ 4 04-page161 | |
| To slow the production of floats for semi-expanding Phantom carburetters due to a discovered issue. | 13th Jun 1933 | Box 13 \ 4 04-page162 | |
| Flooding issue with production carburetters and an urgent request for different floats for testing. | 13th Jun 1933 | Box 13 \ 4 04-page163 | |
| Production plans for carburettors, air silencers, and a new breather scheme for the Bentley. | 15th Jun 1933 | Box 13 \ 4 04-page164 | |
| Modification to the Phantom II semi-expanding carburetter to prevent flooding on inclines. | 30th Jun 1933 | Box 13 \ 4 04-page165 | |
| Comparative test results for a new light float versus a standard float in a carburetter on Shardlow Road. | 30th Jun 1933 | Box 13 \ 4 04-page166 | |
| Power curve data for a Phantom II No.7 large bore unit with a semi-expanding carburettor at different float levels. | 12th Sep 1933 | Box 13 \ 4 04-page167 | |
| Requesting a detail drawing for the air intake of a Large Phantom II Semi-Expanding Carburetter. | 12th Sep 1933 | Box 13 \ 4 04-page168 | |
| Request for parts to test a large Phantom carburettor and an urgent need for an air intake for the 27-EX French test. | 14th Sep 1933 | Box 13 \ 4 04-page169 | |
| Requesting tests on a worm and wheel controlled throttle edge adjustment for a carburetter before production. | 19th Sep 1933 | Box 13 \ 4 04-page170 | |
| Instructional memo for a new worm and wheel controlled throttle adjustment for a carburetter. | 22th Sep 1933 | Box 13 \ 4 04-page171 | |
| Instructions for a modified slow running adjustment scheme for a Phantom II carburetter. | 26th Sep 1933 | Box 13 \ 4 04-page172 | |
| Blueprint alteration for the Phantom II Semi-Expanding Carburetter. | 27th Sep 1933 | Box 13 \ 4 04-page173 | |
| Comparison curve for an old type carburetter and camshaft versus a new type, at the same compression ratio. | 6th Nov 1933 | Box 13 \ 4 04-page174 | |
| Development and testing report on the Phantom semi-expanding carburetter. | 6th Nov 1932 | Box 13 \ 4 04-page175 | |
| Modifications and testing of a carburettor and air silencer system. | 6th Nov 1933 | Box 13 \ 4 04-page176 | |
| Test results for a silencer under various configurations measuring BHP loss and back pressure at 3000 R.P.M. | 6th Nov 1933 | Box 13 \ 4 04-page177 | |
| Blueprint graph comparing power outputs for the 7.67 Litre Phantom II engine with an open exhaust. | 3rd Oct 1933 | Box 13 \ 4 04-page178 | |
| Blueprint for a modification to a main jet sleeve. | 7th Nov 1933 | Box 13 \ 4 04-page179 | |
| Blueprint detailing a modification to a Needle Valve for a Phantom Lec 31.32. | 7th Nov 1933 | Box 13 \ 4 04-page180 | |
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