| Description | Date | Identifier | |
| Comparing the power output of an experimental induction pipe versus a production induction pipe. | 27th Mar 1931 | Box 13 \ 3 03-page216 | |
| Carburetter silencer design, suggesting experiments for oil discharge and a modification for power loss. | 1st Jun 1930 | Box 13 \ 3 03-page217 | |
| Modifications to the carburetter silencer to reduce power loss at high speed. | 4th Jun 1930 | Box 13 \ 3 03-page218 | |
| Temperature tests and issues found during trials at Brooklands. | 11th Jun 1930 | Box 13 \ 3 03-page219 | |
| Acceleration test results comparing a standard carburetter with an air silencer carburetter. | 1st Sep 1930 | Box 13 \ 3 03-page220 | |
| Steering tests conducted at Brooklands with different tyre types and pressures. | 4th Jun 1930 | Box 13 \ 3 03-page221 | |
| Test report on Dunlop Silent Tyres, evaluating steering and ride quality at various pressures and with different wheel setups. | 8th Jul 1930 | Box 13 \ 3 03-page222 | |
| Progress report on the design of double carburettors for the P. 2 engine. | 8th Jul 1930 | Box 13 \ 3 03-page223 | |
| The production of an experimental induction pipe for the P. 2 research project. | 11th Jul 1931 | Box 13 \ 3 03-page224 | |
| Increasing petrol consumption and proposing tests on carburetter performance. | 10th Jul 1930 | Box 13 \ 3 03-page225 | |
| Standardisation report on a new union in the feed pipe to the carburetter. | 6th Jun 1930 | Box 13 \ 3 03-page226 | |
| Design suggestions for a non-expanding carburettor, specifically the accelerator pump mechanism. | 23th Jul 1930 | Box 13 \ 3 03-page227 | |
| The function of an accelerator pump and a starting device for a carburetter system. | 23th Jul 1930 | Box 13 \ 3 03-page228 | |
| Typed note discussing the operation and design of a P.2. non-expanding carburetter, referencing blueprints. | 25th Jul 1930 | Box 13 \ 3 03-page229 | |
| Arrangement of controls for the starting carburetter using a universal joint. | 25th Jul 1930 | Box 13 \ 3 03-page230 | |
| Proposal to put the starting carburetter control stop on the dashboard. | 21th Aug 1930 | Box 13 \ 3 03-page231 | |
| Whether improved car performance is due to drilling an air-valve or advanced ignition timing. | 28th Jul 1930 | Box 13 \ 3 03-page232 | |
| Design memo detailing the features of the P.2 Twin Carburetters, page 2. | 21th Aug 1930 | Box 13 \ 3 03-page233 | |
| Sending of drawings for twin carburetters for the Phantom chassis. | 23th Aug 1930 | Box 13 \ 3 03-page234 | |
| Induction pipe and hot spot for the twin carburetter on a Phantom II. | 31th Aug 1930 | Box 13 \ 3 03-page235 | |
| Requesting an estimated timeline for the commencement of testing on new carburetters. | 3rd Sep 1930 | Box 13 \ 3 03-page236 | |
| Providing a timeline estimate for the testing and drawing of Phantom II twin carburetters. | 5th Sep 1930 | Box 13 \ 3 03-page237 | |
| Revising the delivery time for Phantom II twin carburettors. | 6th Sep 1930 | Box 13 \ 3 03-page238 | |
| Modification of a carburetter with an air maze gauze screen for cars in Australia. | 9th Sep 1930 | Box 13 \ 3 03-page239 | |
| Outstanding issues with the Phantom II Left Hand Chassis following 10,000 miles of testing. | 9th Sep 1930 | Box 13 \ 3 03-page240 | |
| Modifications to the clutch, carburettor, and brakes for experimental cars. | 17th Sep 1930 | Box 13 \ 3 03-page241 | |
| Confirming the completion of design work for twin carburetter controls. | 17th Sep 1930 | Box 13 \ 3 03-page242 | |
| Modifying car 58-GN's springing and fitting a carburetter with an air silencer, compromising power for reduced engine noise. | 13th Oct 1930 | Box 13 \ 3 03-page243 | |
| The finalisation of the Phantom II carburetter air intake design, pending high-speed tests. | 13th Oct 1930 | Box 13 \ 3 03-page244 | |
| Tests to determine the necessary degree of silencing for the Phantom II carburettor air intake. | 22th Oct 1930 | Box 13 \ 3 03-page245 | |
| Alterations to a carburetter and silencer system, detailing the effects on power loss and noise levels. | 22th Oct 1930 | Box 13 \ 3 03-page246 | |
| The condition of tests comparing lap speeds for various carburettor and air silencer configurations. | 22th Oct 1930 | Box 13 \ 3 03-page247 | |
| Performance test results comparing an air maze and an air silencer, with speed and acceleration tests on a 19-MX car. | 22th Oct 1930 | Box 13 \ 3 03-page248 | |
| Air silencer tests, comparing different baffle designs and proposing a new standard for Phantom II cars. | 22th Oct 1930 | Box 13 \ 3 03-page249 | |
| Continued document page discussing how three outer baffles stop dust from being drawn into the carburetter. | 22th Oct 1930 | Box 13 \ 3 03-page250 | |
| Graph comparing the performance (B.HP vs Engine R.P.M.) of standard vs. air silenced carburettors. | 22th Oct 1930 | Box 13 \ 3 03-page251 | |
| Blueprint diagram of a Carburetter Air Silencer P.I. showing modifications. | 29th Oct 1930 | Box 13 \ 3 03-page252 | |
| The standardisation of a silencer for the carburetter on the Phantom II car. | 29th Oct 1930 | Box 13 \ 3 03-page253 | |
| Standardisation arrangement for fitting a carburetter silencer to both home and American chassis. | 29th Oct 1930 | Box 13 \ 3 03-page254 | |
| Standardisation of a carburetter silencer for home and American markets. | 29th Oct 1930 | Box 13 \ 3 03-page255 | |
| Proposal to standardise the Air Silencer Carburetter for both English and American use. | 10th Oct 1930 | Box 13 \ 3 03-page256 | |
| Performance characteristics of a silencer for a carburetter. | 31th Oct 1930 | Box 13 \ 3 03-page257 | |
| Alterations and tests on starting carburetters with fixed maximum restriction. | 21th Nov 1930 | Box 13 \ 3 03-page258 | |
| Avoidance of a new design in favour of modifying the existing starter carburetter. | 21th Nov 1930 | Box 13 \ 3 03-page259 | |
| Update on the testing of Phantom II Twin Carburetters. | 8th Dec 1930 | Box 13 \ 3 03-page260 | |
| Thermostat settings, carburation issues, and silencer design for the 25HP and 45HP models. | 11th Dec 1930 | Box 13 \ 3 03-page261 | |
| Note regarding a delay in testing twin carburetters for the Phantom II. | 12th Dec 1930 | Box 13 \ 3 03-page262 | |
| Request to supply spare slow running jets for a Phantom Twin Carburetter for experimental work. | 16th Dec 1930 | Box 13 \ 3 03-page263 | |
| Urgent request for a new scheme for a reserve tank on a 40/50 HP chassis due to a new petrol pump and twin carburetter combination. | 19th Dec 1930 | Box 13 \ 3 03-page264 | |
| Issue of noise from twin carburetters and proposing a solution using the crankcase as a silencer. | 20th Dec 1930 | Box 13 \ 3 03-page265 | |
| The preliminary tests of a new twin-choke carburettor for the Phantom II. | 24th Dec 1930 | Box 13 \ 3 03-page266 | |
| Advantages of drawing air through the crankcase and the use of a honeycomb flame damper. | 24th Dec 1930 | Box 13 \ 3 03-page267 | |
| Twin type carburettor design, including intake from the crankchamber, draining, and air metering. | 26th Dec 1930 | Box 13 \ 3 03-page268 | |
| Instruction to produce a new carburetter valve seating for the Phantom 11 to prolong its life and prevent flooding. | 27th Jan 1931 | Box 13 \ 3 03-page269 | |
| Tests and corrections made on Phantom II twin choke carburettors. | 23th Jan 1931 | Box 13 \ 3 03-page270 | |
| Progress report on the development and testing of an aero-based downdraught carburetter scheme. | 27th Jan 1931 | Box 13 \ 3 03-page271 | |
| Modifications to the Phantom 11 twin choke carburetter. | 27th Feb 1931 | Box 13 \ 3 03-page272 | |
| Performance comparison graph of twin carburettors versus a standard carburettor system. | 22th Jan 1931 | Box 13 \ 3 03-page273 | |
| Single versus double carburetter configurations for 6-cylinder engines and their potential effects on performance. | 2nd Mar 1931 | Box 13 \ 3 03-page274 | |
| Tests of a downdraught carburettor on a Phantom II, detailing issues with distribution. | 26th Feb 1931 | Box 13 \ 3 03-page275 | |
| Comparing downdraught and SU carburettors, focusing on distribution and proposing tests for induction heating. | 26th Feb 1931 | Box 13 \ 3 03-page276 | |
| Performance graph comparing Downdraught and Standard carburettors on a Phantom II engine with a 5/1 compression ratio head and open exhaust. | 26th Feb 1931 | Box 13 \ 3 03-page277 | |
| List of modifications for the Phantom twin-choke carburetter. | 26th Feb 1931 | Box 13 \ 3 03-page278 | |
| List of modifications and settings for carburetter components. | 20th Dec 1972 | Box 13 \ 3 03-page279 | |
| Blueprint showing a cross-section of a valve seating component. | 20th Dec 1972 | Box 13 \ 3 03-page280 | |
| Blueprint detailing a modification to a sleeve for a variable valve on a twin choke carburettor. | 26th Feb 1931 | Box 13 \ 3 03-page281 | |
| Blueprint for a modification to a diffuser body for a Twin Choke Carburettor PII. | 4th Feb 1920 | Box 13 \ 3 03-page282 | |
| Blueprint showing modifications to a pedestal, including two views and some dimensions. | 4th Feb 1920 | Box 13 \ 3 03-page283 | |
| Blueprint detailing a modification to a diffuser outer tube. | 4th Feb 1920 | Box 13 \ 3 03-page284 | |
| Control scheme for an accelerator pump connection with the throttle spindle for twin carburettors. | 2nd Apr 1921 | Box 13 \ 3 03-page285 | |
| Blueprint drawing of a slow running plug (F.1.). | 2nd Apr 1921 | Box 13 \ 3 03-page286 | |
| Schematic diagram for a slow running system of a twin-choke carburetor, detailing an adjusting screw. | 6th Apr 1936 | Box 13 \ 3 03-page287 | |
| Blueprint for a machined part with drilling, reaming, spotfacing, and tapping instructions. | 3rd Jan 1928 | Box 13 \ 3 03-page288 | |
| Blueprint showing a cross-section and dimensions for a Tappet Spindle (Twin Series B). | 3rd Jan 1928 | Box 13 \ 3 03-page289 | |
| Blueprint showing a modification to a sleeve for a slow running jet. | 25th Feb 1930 | Box 13 \ 3 03-page290 | |
| Cross-section diagram showing the modification of passage sizes from a float-chamber to variable valves. | 28th Jul 1934 | Box 13 \ 3 03-page291 | |
| Drawing of an atmospheric release to float chambers and petrol feed to an accelerating pump well. | 28th Jul 1934 | Box 13 \ 3 03-page292 | |
| Drawing of a modified carburetter throttle for a PII model. | 15th Jan 1931 | Box 13 \ 3 03-page293 | |
| Blueprint of a carburetter choke. | 15th Mar 1931 | Box 13 \ 3 03-page294 | |
| Experimental modifications to the Phantom downdraught carburetter. | 5th Mar 1931 | Box 13 \ 3 03-page295 | |
| Request to supply restrictor jets and jet needles for Phantom carburetters. | 10th Mar 1931 | Box 13 \ 3 03-page296 | |
| Specification table detailing the dimensions for jet needles for a downdraught carburetter. | 13th Mar 1931 | Box 13 \ 3 03-page297 | |
| The performance issues of a twin carburetter under various driving conditions. | 13th Mar 1931 | Box 13 \ 3 03-page298 | |
| Inadequate carburetter silencer, requesting new versions V.1083 and V.1082 be made for car 27-EX. | 17th Mar 1931 | Box 13 \ 3 03-page299 | |
| Request to manufacture diffuser parts for Phantom Twin carburettors. | 20th Mar 1931 | Box 13 \ 3 03-page300 | |
| Proposal for an improved induction pipe for the P. 2 down draught carburetter to improve fuel distribution. | 2nd Apr 1931 | Box 13 \ 3 03-page301 | |
| Experiments to improve fuel distribution with a downdraught carburetter. | 2nd Apr 1931 | Box 13 \ 3 03-page302 | |
| Road tests of a Phantom II twin-choke carburettor. | 2nd Apr 1931 | Box 13 \ 3 03-page303 | |
| Carburettor metering, fuel starvation during turns, and performance test results. | 2nd Apr 1931 | Box 13 \ 3 03-page304 | |
| Progress report on carburettor testing and development, covering noise, performance, and fuel consumption. | 2nd Apr 1931 | Box 13 \ 3 03-page305 | |
| Development of double carburetters, addressing issues of uneven flow, slow filling, and cornering. | 9th Apr 1931 | Box 13 \ 3 03-page306 | |
| Investigation into carburetter flooding and fuel starvation issues on the Phantom II during sharp turns. | 17th Apr 1931 | Box 13 \ 3 03-page307 | |
| Carburetor float issues during turns in the R. engine and Phantom II. | 17th Apr 1931 | Box 13 \ 3 03-page308 | |
| Diagram illustrating a float chamber issue in a Phantom II Twin Choke Carburetter at a 14-degree inclination. | 17th Apr 1931 | Box 13 \ 3 03-page309 | |
| The petrol level performance of a P.2 twin choke carburetter, comparing present and modified designs. | 21th Apr 1931 | Box 13 \ 3 03-page310 | |
| Fuel supply of low and high-speed jets and the design of the float chamber lid joint. | 21th Apr 1931 | Box 13 \ 3 03-page311 | |
| Alterations to the P.2. carburetter to prevent cutting out and advocating for the in-house development of double carburetters. | 4th May 1931 | Box 13 \ 3 03-page312 | |
| Adjustments and a proposed final design for P. 2. twin carburetters. | 1st May 1931 | Box 13 \ 3 03-page313 | |
| Drawings for a modified twin carburetter and hot spot piping. | 2nd May 1931 | Box 13 \ 3 03-page314 | |
| The slow running scheme and modifications for twin choke carburettors. | 5th May 1931 | Box 13 \ 3 03-page315 | |
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